Reinforced universal type degreased powder and preparation process thereof

Abstract

The invention discloses reinforced universal type degreased powder and a preparation process thereof, the reinforced universal type degreased powder comprises a basic carrier material and a functional component material, the basic carrier material comprises anhydrous sodium sulfate and sodium bicarbonate, and the functional component material comprises a surface active material, an enzymolysis degreasing material, an alkaline slow-release material, an oxidation carbon deposition treatment material and an auxiliary additive, the surface active material is prepared from rhamnolipid, APG (alkyl polyglucoside), PFBS (perfluorooctane sulfonate), polyether modified trisiloxane, cocamidopropyl betaine and polyoxyethylene lauryl ether. The whole degreasing powder can achieve targeted cracking of the pain point that stubborn oil stains are difficult to decompose, raw materials for sensitive characteristics of aluminum alloy / titanium alloy are optimized, and the degreasing powder which is thorough in stubborn oil stain degreasing, free of damage to sensitive materials, stable in long-term storage, environmentally friendly and compliant is achieved; through the preparation process of double-enzyme coating, silicon-based cooperation and double-cavity isolation, an efficient, safe and stable brand-new solution is provided for degreasing of the metal precision component.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal processing, in particular to a reinforced general-purpose degreasing powder and a preparation process thereof. BACKGROUND

[0002] The core of metal degreasing is to remove organic contaminants such as oil stains, grease, cutting fluid residues, fingerprints, etc. on the surface of the metal, so as to create a clean surface for subsequent welding, heat treatment, coating (such as anti-rust paint, high-temperature resistant coating), assembly and other processes. If the degreasing is not complete, it will lead to serious defects such as welding porosity, coating blistering and falling off, and heat treatment deformation.

[0003] The current degreasing powder is prone to the following problems in the use process: it is difficult to decompose stubborn oil stains, sensitive materials are prone to damage during degreasing, and the degreasing effect is reduced after long-term storage. SUMMARY

[0004] The present application provides a reinforced general-purpose degreasing powder and a preparation process thereof, which can target the pain point of "difficult to decompose stubborn oil stains", optimize the raw materials according to the sensitive characteristics of aluminum alloy / titanium alloy, and realize "degreasing powder with complete degreasing of stubborn oil stains, no damage to sensitive materials, stable after long-term storage, and environmental protection compliance"; through the preparation process of double-enzyme coating, silicon-based synergy and double-cavity isolation, a "high-efficiency, safe and stable" new solution is provided for the degreasing of metal precision components.

[0005] In order to solve the above technical problems, the present application provides a reinforced general-purpose degreasing powder, which comprises: a basic carrier material and a functional component material, the basic carrier material comprises anhydrous sodium sulfate and sodium bicarbonate, the functional component material comprises: a surface active material, an enzymatic degreasing material, an alkaline slow-release material, an oxidized carbon deposit treatment material and an auxiliary additive, the surface active material comprises rhamnolipid, APG, PFBS and polyether modified trisiloxane, cocamide propyl betaine and lauryl alcohol polyoxyethylene ether, the enzymatic degreasing material comprises recombinant siloxane hydrolase, recombinant rice lipase, D-sorbitol and trehalose, the alkaline slow-release material comprises beta-cyclodextrin coated sodium carbonate, ammonium bicarbonate, sodium citrate and sodium silicate, and the oxidized carbon deposit treatment material comprises PMPS, dimethyl oxalate, alpha-alumina nanoparticles and polymaleic anhydride.

[0006] As a preferred embodiment of the above technical solution, the auxiliary additive comprises a natural corrosion inhibitor, a slow-release synergist, an antioxidant, a penetrating agent, a coating agent and ASDA.

[0007] As the preferred technical scheme of the above, the basic carrier material and the functional component material are respectively 50-65% and 35-48% by weight percentage, wherein the functional component material is respectively 4.1-6.3% of surfactant, 1.0-2.2% of enzymatic degreasing material, 21.8-32.5% of alkaline slow-release material, 2.9-6.7% of oxidized carbon deposit treatment material, and 0.3-5.2% of auxiliary additive by weight percentage.

[0008] As the preferred technical scheme of the above, the oxidized carbon deposit treatment material and the basic carrier material after mixing include mixable material and isolation material, the mixable material includes potassium bisulfate composite powder, alpha-aluminum oxide nanoparticles, poly-maleic anhydride anhydrous sodium sulfate, and sodium bicarbonate, and the isolation material includes dimethyl oxalate and anhydrous sodium sulfate, wherein the proportion of anhydrous sodium sulfate in the mixable material and the isolation material is 94-96:4-6.

[0009] The application also provides a preparation process of the reinforced general-purpose degreasing powder, which specifically includes the following steps:

[0010] Step one: raw material pretreatment, after classifying different raw materials, screening and accurate treatment are performed;

[0011] Step two: functional component material preparation, different functional component materials are processed in different equipment respectively to obtain corresponding functional component materials, specifically including surfactant, enzymatic degreasing material, alkaline slow-release material, mixable material, and isolation material, and when preparing the alkaline slow-release material, the basic carrier material is mixed with beta-cyclodextrin coated sodium carbonate, ammonium bicarbonate, sodium citrate, ASDA, sodium silicate, anhydrous sodium sulfate, and sodium bicarbonate in a mixing tank A at a proportion, stirred at 20r / min for 10min to form uniform mixture A, and form the basic carrier-alkaline slow-release material;

[0012] Step three: composite mixing, all functional component materials except the isolation material are sequentially put into a double-helix conical mixer, mixed at 25r / min for 20-40min, and sampled from the top, middle and bottom of the double-helix conical mixer every five minutes, and after sampling, the component deviation is detected by HPLC, and the mixing is stopped after reaching the standard to obtain the mixed main material;

[0013] Step four: material processing, the mixed main material and the isolation material are respectively put into a low-temperature vacuum drying machine for drying treatment under a vacuum degree of 10 Pa, and are respectively dried for 2 h and 1 h at 38-42 DEG C and 34-36 DEG C, respectively. After drying, the mixed main material is transported into a magnetic separator to screen out a small amount of metal debris, and then the dried mixed main material is screened through a double-layer vibrating screen to obtain finished mixed material. After drying, the isolation material is transported into a pneumatic screening machine in a screening cavity filled with high-purity nitrogen for screening. The dried and screened finished isolation material is transported to a PTFE sealed tank for storage in an environment of room temperature 20 DEG C and relative humidity less than or equal to 30%.

[0014] Step five: detection and sub-packaging, the finished mixed material and the finished isolation material are respectively detected for parameters, and the materials meeting the standards are sub-packaged through a double-cavity moisture-proof packaging bag machine into A bag material and B bag material. The A bag material and the B bag material are mixed in proportion when used to obtain the enhanced general-purpose defatted powder.

[0015] As a preferred embodiment of the above technical solution, the precise processing in step one includes enzyme treatment, nano-particle treatment, acid component treatment and conventional component treatment. The enzyme treatment is performed by putting recombinant siloxane hydrolase and recombinant rice lipase into a vacuum freeze dryer for treatment at-50 DEG C and 10 Pa for 3 h, so as to ensure that the water content is less than or equal to 0.3% for standby use. The nano-particle treatment is performed by adding alpha-aluminum oxide nanoparticles and polymaleic anhydride into an ultrasonic dispersing instrument for treatment at 25 DEG C and 300 W for 10 min, so as to ensure that the particle size range is 50-80 nm for standby use. The acid component treatment is performed by adding oxalic acid dimethyl ester and deionized water into a corrosion-resistant batching tank in the same proportion and pre-dissolving at 15 r / min and 25 DEG C, and then calibrating an acid metering pump for standby use. The conventional component treatment is performed by respectively heat-air drying and screening other raw materials without environmental requirements for standby use.

[0016] As a preferred embodiment of the above technical solution, the enzyme-degraded defatted material in step two is prepared by using a double-cavity fluidized bed coating machine. The silicic ester enzyme and the coating agent are put into A cavity at a ratio of 1:3, and the rice lipase is put into B cavity at the same ratio. The double cavities are synchronously coated at a wind speed of 0.8 m / s for 30 min, and high-purity nitrogen is introduced into the whole process for protection, so as to obtain surface active material.

[0017] As a preferred embodiment of the above technical solution, when the surface active material is prepared in step two, rhamnolipid, APG, PFBS, polyether modified trisiloxane and polyether modified silicone oil are put into a mixing tank B at a ratio, and are stirred at 20 r / min for 10-15 min to form a mixture B. Meanwhile, cocamide propyl betaine and lauryl alcohol polyoxyethylene ether are put into a mixing tank C at a ratio of 3:1, and are stirred at 15 r / min for 8-10 min to form a mixture C. Then, the mixture B and the mixture C are put into a double-spiral mixing machine to form complete surface active material.

[0018] As the preferred of the above technical solution, in the step two, the PMPS, alpha-alumina nanoparticles and polymaleic anhydride are put into the mixing tank D in proportion to prepare the mixable material, the pH value is controlled at 6.5-7.0, stirred at 10 r / min for 4-8 min, and the particle potential value is detected by a potential instrument, and the mixing is stopped after ensuring that the absolute value of the potential is greater than 30 mV, to obtain the mixable material; in the preparation of the isolation material, dimethyl oxalate and anhydrous sodium sulfate are put into the PTFE-lined three-dimensional mixer in proportion, and the anhydrous sodium sulfate is put in first, then the PTFE-lined three-dimensional mixer is started to run at a low speed of 5 r / min, then the dimethyl oxalate is gradually and slowly put in through the closed screw feeder within 10 min, after the feeding is completed, the speed is adjusted to 15 r / min, and the mixing is carried out for 8 min to obtain the isolation material.

[0019] As the preferred of the above technical solution, in the step five, the closed nitrogen protection screw conveyor is used to transfer the finished isolation material in the PTFE sealed tank to the double-cavity moisture-proof packaging bag machine, and the nitrogen flow of the closed nitrogen protection screw conveyor is 1 L / min during the transfer process, in addition, there is a physical isolation film between the A bag material and the B bag material, and the isolation film is squeezed and broken to mix when used.

[0020] The application provides a reinforced general-purpose defatted powder and a preparation process thereof, which has surface active material, enzymatic defatted material, alkaline slow-release material and oxidation carbon deposition treatment material, and adds oxalic acid dimethyl ester, alpha-aluminum oxide nanoparticles and polymaleic anhydride in the current common defatted powder, and optimizes the PMPS dosage, the oxalic acid dimethyl ester can react with the PMPS after optimization to form a weak acidic environment with a pH of 6.5-7.0, and a "softening-oxidation-peeling" synergistic effect is formed, which gently destroys the carbon-carbon double bond (C=C) in the carbon deposition, so that the porosity of the dense carbon deposition is increased from 10% to 40%, creating a penetration channel for subsequent peeling, while avoiding the corrosion of strong acid to the metal, the alpha-aluminum oxide nanoparticles can physically assist in peeling the loose carbon deposition, solving the problem that the softened carbon deposition is still difficult to peel off, effectively improving the carbon deposition peeling rate, the polymaleic anhydride can be adsorbed on the surface of the peeled carbon deposition particles to form an electrostatic repulsion layer, preventing the particles from re-attaching to the shell surface, and the dispersant can be completely removed by subsequent rinsing without the risk of residue; the recombinant siloxane hydrolase, the polyether modified trisiloxane and the optimized surface active agent compounding ratio are added, the recombinant siloxane hydrolase specifically recognizes and hydrolyzes the Si-O bond, converting the insoluble silicon-based lubricating oil into water-soluble silanol, solving the problem of "emulsification only, not decomposition" from the root, the polyether modified trisiloxane forms a hydrogen bond with the hydrolyzed silanol as a special silicon-based dispersant, preventing the silanol from re-polymerizing and agglomerating, while reducing the interfacial tension between the defatting liquid and the silicon-based oil stain, and the original "APG+AEO" is adjusted to "APG+Rhamnolipid+PFBS", wherein the rhamnolipid replaces part of the LAS, which can enhance the emulsification efficiency, the PFBS can improve the penetration ability, and the three can work together to ensure that the silicon-based oil stain can quickly penetrate, completely hydrolyze and stably disperse; the sodium silicate dosage is optimized, the beta-cyclodextrin coated sodium carbonate and ammonium bicarbonate are added, the silicon residue risk is reduced, part of the sodium silicate is replaced by sodium citrate to reduce the sodium silicate dosage, the sodium citrate has chelation (Ca²⁺ / Mg²⁺) and weak base buffering functions, improves the chelation value and effectively prevents scale formation, the beta-cyclodextrin coated sodium carbonate can realize slow release of OH⁻, avoid local over-alkalization, and greatly reduce the corrosion rate of aluminum alloy, and the ammonium bicarbonate can form a pH gradient with sodium carbonate, that is, the pH is 8.5-9.0 in the initial defatting stage (0-5min) (adapted to the activity of double enzymes), and the pH is 9.5-10 in the later stage (5-10min).0 (enhanced oxidative degreasing), taking into account enzyme activity protection and degreasing efficiency, avoiding single pH that cannot meet the dual functional requirements; optimizing the type of enzyme, adding D-sorbitol and trehalose, replacing ordinary lipase with recombinant rice lipase, improving the high temperature resistance of recombinant enzyme, and improving the ester bond hydrolysis efficiency of ordinary cutting oil, D-sorbitol and trehalose can stabilize the spatial structure of the enzyme and form a glassy protective layer, which cooperates to improve the enzyme activity retention rate from 90% to 95% in an alkaline environment at 60°C, greatly improving the storage time and shelf life; the entire degreasing powder can realize targeted cracking of the "difficult oil stain decomposition" pain point, optimize the raw materials for aluminum alloy / titanium alloy sensitive characteristics, strengthen the "material compatibility", upgrade the raw materials from "single function" to "multifunctional synergy + compliance", and form a "functional complementary, no conflict" synergistic system between raw materials, and finally realize "difficult oil stain completely degreasing, sensitive material without damage, long-term storage stability, environmentally friendly and compliant degreasing powder.

[0021] During the production preparation process, targeted raw material treatment, preparation and storage, the three major bottlenecks of "insufficient function coverage, poor stability, high corrosion" that are prone to occur in the use process of traditional degreasing powder are broken through. The "targeted treatment of complex oil stains" and "extreme protection of materials" are combined, and through the preparation process of double-enzyme coating, silicon-based synergy and double-cavity isolation, the degreasing efficiency is improved by 40%, the corrosion rate is reduced by 90%, and the storage stability is prolonged by 5 times, providing a "high efficiency, safety and stability" new solution for metal precision component degreasing.

[0022] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, and to be implemented in accordance with the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The preparation process flow chart of the present application is shown in the following table: DETAILED DESCRIPTION

[0024] In order to make the purpose, feature, advantage of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] Embodiment one:

[0026] The embodiment of the present application provides a kind of to strengthen general type defatted powder, comprising: basic carrier material and functional ingredient material, basic carrier material includes anhydrous sodium sulfate and sodium bicarbonate, functional ingredient material includes: surface active material, enzymatic defatting material, alkaline sustained-release material, oxidized carbon deposit processing material and auxiliary additive, surface active material includes rhamnolipid, APG, PFBS and polyether modified trisiloxane, cocamide propyl betaine and lauryl alcohol polyoxyethylene ether, enzymatic defatting material includes recombinant siloxane hydrolase, recombinant rice lipase, D-sorbitol and trehalose, alkaline sustained-release material includes β-cyclodextrin coated sodium carbonate, ammonium bicarbonate, sodium citrate and sodium silicate, oxidized carbon deposit processing material includes PMPS, dimethyl oxalate, alpha-alumina nanoparticles and polymaleic anhydride.

[0027] The embodiment provides a reinforced general-purpose degreasing powder, which has a surface active material, an enzymatic hydrolysis degreasing material, an alkaline slow-release material, an oxidation carbon deposit treatment material, and adds dimethyl oxalate, alpha-alumina nanoparticles and polymaleic anhydride in the currently common degreasing powder, and optimizes the PMPS dosage, dimethyl oxalate can react with the PMPS after optimization of the dosage to form a weak acidic environment with a pH of 6.5-7.0, a "softening-oxidation-peeling" synergistic effect is formed, the carbon-carbon double bond (C=C) in the compact carbon deposit is mildly destroyed, the compact carbon deposit porosity is increased from 10% to 40%, a penetration channel is created for subsequent peeling, and corrosion of the metal by strong acid is avoided, the alpha-alumina nanoparticles can physically assist in peeling the loose carbon deposit, the problem that the carbon deposit is still difficult to peel after softening is solved, the carbon deposit peeling rate is effectively improved, the polymaleic anhydride can be adsorbed on the surface of the peeled carbon deposit particles to form an electrostatic repulsion layer, the particles are prevented from re-attaching to the shell surface, and the dispersant can be completely removed by subsequent rinsing, without the risk of residue; the recombinant siloxane hydrolytic enzyme, the polyether modified trisiloxane and the optimized surface active agent compounding ratio are added, the recombinant siloxane hydrolytic enzyme specifically recognizes and hydrolyzes the Si-O bond, the water-soluble silanol is converted from the hardly soluble silicon-based lubricating oil, the problem of "emulsification only, not decomposition" is solved from the root, the polyether modified trisiloxane forms a hydrogen bond with the hydrolyzed silanol as a special silicon-based dispersant, the silanol is prevented from re-polymerization and agglomeration, the interfacial tension between the degreasing liquid and the silicon-based oil stain is reduced, the original "APG+AEO" is adjusted to "APG+ rhamnolipid+PFBS" by optimizing the surface active agent compounding ratio, the rhamnolipid replaces part of the LAS, the emulsification efficiency is enhanced, the PFBS can improve the penetration capacity, and the three are synergistic to ensure that the silicon-based oil stain can be quickly penetrated, completely hydrolyzed and stably dispersed; the sodium silicate dosage is optimized, the beta-cyclodextrin coated sodium carbonate and ammonium bicarbonate are added, the silicon residue risk is reduced, part of the sodium silicate is replaced by sodium citrate to reduce the sodium silicate dosage, the sodium citrate has the functions of chelation (Ca²⁺ / Mg²⁺) and weak base buffering, the chelation value is improved to effectively prevent scale formation, the beta-cyclodextrin coated sodium carbonate can realize slow release of OH⁻, local over-alkalization is avoided, and the aluminum alloy corrosion rate is greatly reduced, and the ammonium bicarbonate can form a pH gradient with the sodium carbonate, that is, the pH is 8.5-9.0 (adapted to the double enzyme activity) in the initial stage (0-5min) of degreasing, and the pH is 9.5-10 in the later stage (5-10min).0 (enhanced oxidative degreasing), taking into account enzyme activity protection and degreasing efficiency, avoiding single pH that cannot meet the dual functional requirements; optimizing the type of enzyme, adding D-sorbitol and trehalose, replacing ordinary lipase with recombinant rice lipase, improving the high temperature resistance of recombinant enzyme, and improving the ester bond hydrolysis efficiency of ordinary cutting oil, D-sorbitol and trehalose can stabilize the spatial structure of the enzyme and form a glassy protective layer, which cooperates to increase the enzyme activity retention rate from 90% to 95% in an alkaline environment at 60°C, greatly improving the storage time and shelf life; the entire degreasing powder can realize targeted cracking of the "difficult oil stain decomposition" pain point, raw material optimization for aluminum alloy / titanium alloy sensitive characteristics, strengthening "material compatibility", from "single function" to "multifunctional synergy + compliance" of the raw material upgrade, and a "functional complementation, no conflict" synergistic system is formed between the raw materials, and finally "difficult oil stain is completely degreased, sensitive materials are not damaged, long-term storage is stable, and environmentally friendly and compliant degreasing powder is achieved.

[0028] In a further implementable manner of the present embodiment, the auxiliary additives include natural corrosion inhibitors, slow-release synergists, antioxidants, penetrants, coating agents, and ASDA.

[0029] The auxiliary additives in the present embodiment can be respectively set as natural corrosion inhibitors (vanillin), slow-release synergists (chitosan oligosaccharide), antioxidants (tea polyphenol), penetrants (polyether modified silicone oil), coating agents (β-cyclodextrin), and ASDA (L-aspartic acid diacetic acid tetrasodium), according to needs,

[0030] New vanillin (natural corrosion inhibitor): replace BTA, form coordination bond with metal surface through phenolic hydroxyl group, corrosion inhibition efficiency reaches 90.5%, and does not contain nitrogen element, no hydrogen embrittlement risk, at the same time, vanillin is natural extract, biodegradation rate > 80%, meet environmental protection requirements;

[0031] New chitosan oligosaccharide (corrosion inhibitor synergist): compounded with vanillin at a ratio of 5:1, the amino group of chitosan oligosaccharide can form a physical barrier on the metal surface, prolonging the corrosion protection time from 8h to more than 24h, while promoting the slow release of vanillin, avoiding the rapid consumption of corrosion inhibitor, and reducing the aluminum alloy white spot corrosion rate to less than 0.01%;

[0032] New tea polyphenol (antioxidant): remove free radicals generated during the degreasing process, prevent vanillin from being oxidized and invalid, and protect the titanium alloy surface from being eroded by free radicals, further reducing the risk of hydrogen embrittlement;

[0033] New ASDA: replace EDTA, the chelating ability of ASDA is equivalent to that of EDTA (Ca²⁺ chelating value > 300mg / g), but the biodegradation rate is more than 80% and does not contain heavy metals, and finally can be completely rinsed and removed, without residual risk.

[0034] In a further implementable manner of the embodiment, the base carrier material and the functional component material are respectively 50-65% and 35-48% by weight percentage, wherein the functional component material is respectively 4.1-6.3% surfactant, 1.0-2.2% enzymatic delipidation material, 21.8-32.5% alkaline slow-release material, 2.9-6.7% oxidized carbon deposit treatment material, and 0.3-5.2% auxiliary additive by weight percentage.

[0035] In the embodiment, the raw materials of different components are respectively 50-60% anhydrous sodium sulfate, 2-5% sodium bicarbonate, 1-1.5% rhamnolipid, 1.5-2% APG, 0.5-1% PFBS, 0.3-0.6% polyether-modified trisiloxane, 0.8-1.2% cocamidopropyl betaine, 0.2-0.4% lauryl alcohol polyoxyethylene ether, 0.5-1.0% recombinant siloxane hydrolase, 0.3-0.8% recombinant rice lipase, 0.1-0.2% D-sorbitol, 0.1-0.2% trehalose, 10-15% β-cyclodextrin-coated sodium carbonate, 0.3-0.5% ammonium bicarbonate, 8-12% sodium citrate, 3-5% sodium silicate, 1-2% PMPS, 1.0-1.5% dimethyl oxalate, 0.2-0.4% α-alumina nanoparticles, 0.5-0.8% polymaleic anhydride, 0.1-0.5% natural corrosion inhibitor, 0.05-0.2% slow-release synergist, 0.1-0.3% antioxidant, 0.2-0.4% penetrant, and 0.5-1.5% ASDA by weight percentage.

[0036] In a further implementable manner of the embodiment, the oxidized carbon deposit treatment material and the base carrier material after mixing include mixable material and isolated material, the mixable material includes potassium bisulfate composite powder, α-alumina nanoparticles, polymaleic anhydride anhydrous sodium sulfate, and sodium bicarbonate, and the isolated material includes dimethyl oxalate and anhydrous sodium sulfate, wherein the proportion of anhydrous sodium sulfate in the mixable material and the isolated material is 94-96:4-6.

[0037] The dimethyl oxalate in the embodiment can react with the optimized amount of PMPS to form a weakly acidic environment with a pH of 6.5-7.0, forming a “softening-oxidation-peeling” synergistic effect, gently destroying the carbon-carbon double bond (C=C) in the carbon deposit, increasing the compact carbon porosity from 10% to 40%, creating a penetration channel for subsequent peeling, while avoiding corrosion of the metal by strong acid, and preparing dimethyl oxalate as the main component of the isolated material, which needs to be isolated, to ensure purity during processing and storage by preventing volatilization, cross-contamination, and contact between acidic components and enzymes and alkaline substances, thereby ensuring the efficacy of the isolated material when mixed.

[0038] Embodiment two:

[0039] Reference Figure 1On the basis of the first embodiment, the embodiment provides a preparation process of the reinforced general-purpose defatted powder, and specifically comprises the following steps.

[0040] Step one: raw material pretreatment, after classifying different raw materials, screen and accurate treatment, accurate treatment includes enzyme treatment, nanoparticle treatment, acid component treatment and conventional component treatment, enzyme treatment is by putting recombinant siloxane hydrolase and recombinant rice lipase into a vacuum freeze dryer under the condition of-50℃ and 10Pa for 3h, ensuring that the water content is less than or equal to 0.3% for standby; nanoparticle treatment is by adding α-alumina nanoparticles and polymaleic anhydride into an ultrasonic disperser under the condition of 25℃ and 300W for 10min, ensuring that the particle size range is 50-80nm for standby; acid component treatment is by adding dimethyl oxalate and deionized water in the same proportion in a corrosion-resistant batching tank and pre-dissolving under the condition of 15r / min and 25℃, and acid metering pump calibration for standby; conventional component treatment is to put other raw materials without environmental requirements into a hot air dryer and a screening machine for screening respectively for standby;

[0041] Step two: functional ingredient material preparation, different functional ingredient materials are processed in different equipment respectively to obtain corresponding functional ingredient materials, specifically including surface active material, enzymatic defatted material, alkaline slow-release material, mixable material and isolation material;

[0042] When preparing the alkaline slow-release material, the base carrier material is prepared by putting β-cyclodextrin coated sodium carbonate, ammonium bicarbonate, sodium citrate, ASDA, sodium silicate, anhydrous sodium sulfate and sodium bicarbonate into a mixing tank A in proportion, stirring at 20r / min for 10min to form uniform mixture A, forming the base carrier-alkaline slow-release material;

[0043] The enzymatic defatted material is prepared by using a double-cavity fluidized bed coater, and the silicic ester enzyme and the coating agent are put into A cavity in a proportion of 1:3, and the rice lipase is put into B cavity in the same proportion, and the double cavities are synchronously coated at a wind speed of 0.8m / s for 30min, and high-purity nitrogen gas is introduced throughout the process to protect the surface active material;

[0044] When preparing the surface active material, the rhamnolipid, APG, PFBS, polyether modified trisiloxane and polyether modified silicone oil are put into a mixing tank B in proportion, and stirred at 20r / min for 10-15min to form mixture B, at the same time, the cocamide propyl betaine and lauryl alcohol polyoxyethylene ether are put into a mixing tank C in a proportion of 3:1, and stirred at 15r / min for 8-10min to form mixture C, and then the mixture B and the mixture C are put into a double helix mixer to form the complete surface active material;

[0045] The PMPS, alpha-alumina nanoparticles and polymaleic anhydride are proportionally put into a mixing tank D to prepare the mixable material, the pH value is controlled at 6.5-7.0 and stirred at 10 r / min for 4-8 min, and the particle potential value is detected by a potential instrument to ensure that the absolute value of the potential is > 30 mV, and then the mixing is stopped to obtain the mixable material;

[0046] The dimethyl oxalate and anhydrous sodium sulfate are proportionally put into a PTFE-lined three-dimensional mixer to mix, and the anhydrous sodium sulfate is put in first, then the PTFE-lined three-dimensional mixer is started at a low speed of 5 r / min, then the dimethyl oxalate is gradually and slowly put in through a closed screw feeder within 10 min, after the feeding is completed, the speed is adjusted to 15 r / min, and the mixing is carried out for 8 min to obtain the isolation material;

[0047] Step three: composite mixing, all functional ingredient materials except the isolation material are sequentially put into a double-spiral conical mixer, mixed at 25 r / min for 20-40 min, and sampled from the top, middle and bottom of the double-spiral conical mixer every five minutes, then the ingredient deviation is detected by HPLC after sampling, and the mixing is stopped after reaching the standard to obtain the mixed main material;

[0048] Step four: material processing, the mixed main material and the isolation material are respectively dried in a low-temperature vacuum dryer at a vacuum degree of 10 Pa, and dried at 38-42℃ and 34-36℃ for 2 h and 1 h respectively, after the drying is completed, the mixed main material is transported to a magnetic separator to remove a small amount of metal debris, then the dried mixed main material is screened through a double-layer vibrating screen to obtain the finished product mixed material, and the dried isolation material is transported to a pneumatic screening machine in a screening cavity filled with high-purity nitrogen for screening, and the dried and screened finished product isolation material is moved to a PTFE sealed tank for storage in an environment of room temperature 20℃ and relative humidity ≤ 30%;

[0049] Step five: detection and packaging, the finished product mixed material and the finished product isolation material are respectively detected for parameters, the materials meeting the standard are packaged into A bag material and B bag material by a double-cavity moisture-proof packaging bag machine, the finished product isolation material in the PTFE sealed tank is transported to the double-cavity moisture-proof packaging bag machine by a closed nitrogen protection screw conveyor, the nitrogen flow of the closed nitrogen protection screw conveyor is 1 L / min during the transportation, there is a physical isolation film between the A bag material and the B bag material, and the A bag material and the B bag material are mixed by extruding and breaking the isolation film during use, that is, the A bag material and the B bag material are mixed in proportion during use to obtain the enhanced universal defatting powder.

[0050] The embodiment provides a preparation process of reinforced general-purpose defatted powder, which has targeted raw material treatment, separate preparation and storage, breaks through three big bottlenecks of "insufficient function coverage, poor stability and high corrosion" easily appearing in the use process of traditional defatted powder, combines "targeted treatment of complex oil stains" and "extreme protection material", realizes 40% improvement of defatting efficiency, 90% reduction of corrosion rate and 5 times extension of storage stability through a preparation process of double-enzyme coating, silicon-based cooperation and double-cavity isolation, and provides a "high-efficiency, safe and stable" new solution for defatting of metal precision components, and specific performances are as follows.

[0051] Functional targeting is strong: a full-coverage system of "silicon-based oil stains + ordinary oil stains + high-temperature carbon deposition", APG / PFBS is used to solve silicon-based oil emulsification (emulsification rate 99%), cocamide propyl betaine and lauryl alcohol polyoxyethylene ether are used to treat ordinary oil and fat, PMPS+dimethyl oxalate is used to decompose carbon deposition (removal rate 99.2%), and the system is suitable for defatting requirements of complex oil stain scenes of different metal parts.

[0052] Material protection is extremely extreme: ASDA+vanillin / chitosan, the corrosion rate of aluminum alloy is less than 0.0008 mm / a, and the risk of hydrogen embrittlement of titanium alloy is zero.

[0053] High enzyme activity retention rate: beta-cyclodextrin coating+double stabilizer (trehalose+ sorbitol), enzyme activity loss is less than or equal to 5% after 18 months of room temperature storage, compared with 30% loss of traditional process for 3 months, the storage time is greatly increased.

[0054] No early reaction of ingredients: double-cavity isolation of dimethyl oxalate, volatilization rate is less than or equal to 0.5%, alkaline component is released and controlled, pH is stably controlled at 9.0±0.5, and defatting performance and effect are effectively ensured.

[0055] High-efficiency process integration: double-cavity equipment synchronous processing (such as double-enzyme coating period is shortened from 60 min to 30 min), module premixing reduces compounding time, and the total period is shortened by 40% compared with the traditional process.

[0056] Environmentally friendly and safe: the biodegradation rate of all ingredients is greater than 80% (such as ASDA replacing EDTA), there is no toxic residue, and the standard of low pollution and high performance is embodied.

[0057] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0058] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0059] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A reinforced general-purpose defatting powder, characterized in that, include: The product comprises a base carrier material and functional ingredients. The base carrier material includes anhydrous sodium sulfate and sodium bicarbonate. The functional ingredients include: surfactants, enzymatic lipolysis agents, alkaline slow-release agents, oxidative carbon deposit treatment agents, and auxiliary additives. The surfactants include rhamnolipids, APG, PFBS, polyether-modified trisiloxanes, cocamidopropyl betaine, and lauryl alcohol polyoxyethylene ether. The enzymatic lipolysis agents include recombinant siloxane hydrolase, recombinant rice lipase, D-sorbitol, and trehalose. The alkaline slow-release agents include β-cyclodextrin-coated sodium carbonate, ammonium bicarbonate, sodium citrate, and sodium silicate. The oxidative carbon deposit treatment agents include PMPS, dimethyl oxalate, α-alumina nanoparticles, and polymaleic anhydride.

2. The enhanced general-purpose degreasing powder according to claim 1, characterized in that, The auxiliary additives include natural corrosion inhibitors, slow-release synergists, antioxidants, penetrants, coating agents, and ASDA.

3. The enhanced general-purpose degreasing powder according to claim 1, characterized in that, The base carrier material and functional ingredient material are respectively, by weight percentage: base carrier material 50-65%, functional ingredient material 35-48%, wherein the functional ingredient material is respectively, by weight percentage: surfactant 4.1-6.3%, enzymatic degreasing agent 1.0-2.2%, alkaline slow-release agent 21.8-32.5%, carbon deposit oxidation treatment agent 2.9-6.7%, and auxiliary additives 0.3-5.2%.

4. The enhanced general-purpose degreasing powder according to claim 1, characterized in that, The oxidized carbon deposit treatment material and the base carrier material, after being mixed, include a miscible material and a separating material. The miscible material includes potassium bisulfate composite powder, α-alumina nanoparticles, polymaleic anhydride anhydrous sodium sulfate and sodium bicarbonate. The separating material includes dimethyl oxalate and anhydrous sodium sulfate, wherein the ratio of anhydrous sodium sulfate in the miscible material and the separating material is 94-96:4-6.

5. A preparation process for a general-purpose degreasing powder, characterized in that, Specifically, the following steps are included: Step 1: Raw material pretreatment, which involves classifying different raw materials and then screening and processing them precisely; Step 2: Functional ingredient preparation. Different functional ingredients are processed separately in different equipment to obtain the corresponding functional ingredients, including surfactants, enzymatically degreasing agents, alkaline slow-release agents, miscible agents, and separators. When preparing the alkaline slow-release agent, β-cyclodextrin-coated sodium carbonate, ammonium bicarbonate, sodium citrate, ASDA, sodium silicate, anhydrous sodium sulfate, and sodium bicarbonate are added to mixing tank A in proportion and stirred at 20 r / min for 10 min to form a uniform mixture A, which forms the basic carrier-alkaline slow-release agent. Step 3: Composite mixing. All functional components except the separator are sequentially added into the double helix conical mixer and mixed at 25 r / min for 20-40 min. Samples are taken from the top, middle and bottom of the double helix conical mixer every five minutes. After sampling, the component deviation is detected by HPLC. Once the standard is met, the mixing is stopped to obtain the mixed main material. Step 4: Material processing. The mixed main material and the separator are separately put into a low-temperature vacuum dryer and dried under a vacuum of 10Pa. They are dried at 38-42℃ and 34-36℃ for 2 hours and 1 hour respectively. After drying, the mixed main material is conveyed to a magnetic separator to remove trace metal debris. The dried mixed main material is then screened through a double-layer vibrating screen to obtain the finished mixture. After drying, the separator is conveyed to a pneumatic sieve with high-purity nitrogen gas in the screening chamber for screening. The dried and screened separator is the finished separator, which is then transferred to a PTFE sealed container and stored at room temperature of 20℃ and relative humidity ≤30%. Step 5: Testing and Packaging. The finished mixture and the finished separator are tested for parameters. Materials that meet the standards are packaged into A bags and B bags using a double-cavity moisture-proof packaging bag machine. When using, the A bag and B bag materials are mixed in proportion to obtain the reinforced general-purpose degreasing powder.

6. The preparation process of a reinforced general-purpose degreasing powder according to claim 5, characterized in that, Step one involves precise processing, including enzyme treatment, nanoparticle treatment, acidic component treatment, and conventional component treatment. Enzyme treatment involves adding recombinant recombinant siloxane hydrolase and recombinant rice lipase to a vacuum freeze dryer and treating them at -50℃ and 10Pa for 3 hours to ensure a moisture content of less than or equal to 0.3% before use. Nanoparticle treatment involves adding α-alumina nanoparticles and polymaleic anhydride to an ultrasonic disperser and treating them at 25℃ and 300W for 10 minutes to ensure a particle size range of 50-80nm before use. Acidic component treatment involves adding dimethyl oxalate and deionized water in equal proportions to a corrosion-resistant mixing tank and pre-dissolving them at 15r / min and 25℃, and calibrating the acid metering pump before use. Conventional component treatment involves hot air drying and screening of other raw materials without environmental requirements before use.

7. The preparation process of a reinforced general-purpose degreasing powder according to claim 5, characterized in that, In step two, the enzymatic delipidase was prepared using a dual-chamber fluidized bed coating machine. The silanase and coating agent were added to chamber A in a 1:3 ratio, and the rice lipase was added to chamber B in the same ratio. The two chambers were coated simultaneously for 30 minutes at an air velocity of 0.8 m / s, and high-purity nitrogen was introduced throughout the process for protection, resulting in the surfactant.

8. The preparation process of a reinforced general-purpose degreasing powder according to claim 5, characterized in that, In step two, when preparing the surfactant, rhamnolipid, APG, PFBS, polyether-modified trisiloxane, and polyether-modified silicone oil are added to mixing tank B in proportion and stirred at 20 r / min for 10-15 min to form mixture B. At the same time, cocamidopropyl betaine and lauryl alcohol polyoxyethylene ether are added to mixing tank C in a 3:1 ratio and stirred at 15 r / min for 8-10 min to form mixture C. Then, mixture B and mixture C are fed together into a twin-screw mixer to form a complete surfactant.

9. The preparation process of a reinforced general-purpose degreasing powder according to claim 5, characterized in that, In step two, when preparing the mixable material, PMPS, α-alumina nanoparticles, and polymaleic anhydride are added to mixing tank D in proportion. The pH value is controlled at 6.5-7.0 and the mixture is stirred at 10 r / min for 4-8 min. The particle potential value is detected with a potentiometer. Mixing is stopped after ensuring that the absolute value of the potential is >30 mV to obtain the mixable material. When preparing the separator material, dimethyl oxalate and anhydrous sodium sulfate are added to a PTFE-lined three-dimensional mixer in proportion. Anhydrous sodium sulfate is added first, and then the PTFE-lined three-dimensional mixer is started at a low speed of 5 r / min. Dimethyl oxalate is then gradually and slowly added over 10 min through a closed screw feeder. After the feeding is completed, the speed is adjusted to 15 r / min and the mixture is stirred for 8 min to obtain the separator material.

10. The preparation process of a reinforced general-purpose degreasing powder according to claim 5, characterized in that, In step five, a closed nitrogen-protected screw conveyor is used to transfer the finished isolation material in the PTFE sealed tank to the double-chamber moisture-proof packaging bag machine. The nitrogen flow rate of the closed nitrogen-protected screw conveyor is 1L / min during the transfer process. In addition, there is a physical isolation film between the A bag material and the B bag material. When using it, the isolation film is squeezed and broken to mix the materials.

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