101 results about "Isocaproic acid" patented technology

The invention relates to the technical field of heavy anti-corrosion coatings, in particular to a graphene enhanced epoxy modified organic silicon resin heavy anti-corrosion powder coating. The coating is prepared from the following components in parts by weight: 42 to 58 parts of epoxidized epoxy modified organic silicon resin, 0.8 to 2.5 parts of hydroxylated graphene, 6 to 11 parts of nano zirconium dioxide coated boron nitride, 2.5 to 5.5 parts of lanthanum iso-octoate-titanate composite coupling agent, 1.5 to 3.5 parts of bis (3-triethoxysilylpropyl) disulfide, 4 to 7 parts of polyhedral oligomeric silsesquioxane, 5 to 8 parts of curing agent, 0.8 to 1.8 parts of flatting agent and 0.4 to 0.9 part of defoaming agent. 2.5 to 4.5 parts of polyether-ether-ketone micro powder and 1.2 to 2.8 parts of fluorine-containing phosphate ester. According to the invention, the resin is modified through chemical bridging, the modified graphene and the nano-coated powder are matched to construct a synergistic enhancement system, and the interface bonding is optimized by the composite coupling agent. The coating is excellent in adhesive force, corrosion resistance and mechanical property, good in processing fluidity and high in aging resistance and thermal stability, solves the problem that a traditional product is short in performance, and meets the industrial requirement.

The invention discloses an aniline pyridine amino-aluminum catalyst and a preparation method and application thereof, belonging to the technical field of polyester catalysts. The invention can directly utilize an aniline pyridine amino ligand to react with an aluminum source, and directly drain the solvent after the reaction to obtain a corresponding catalyst. The invention also utilizes the synthesized catalyst to catalyze monomers such as cyclic esters and lactones to prepare biodegradable aliphatic polyesters, and the monomer conversion rate is greater than 96%. Compared with the currently commercialized stannous isooctanoate catalyst, the aniline pyridine amino-aluminum catalyst provided by the invention has higher catalytic activity and lower biological toxicity, and has certain application prospects.

The invention discloses an oxidation kettle and a method for preparing an isocaprylic acid intermediate product sodium isocaprylate, the oxidation kettle comprises a kettle body and a jacket fixedly sleeved outside the circular outer part and the bottom end of the kettle body, a sealing seat is arranged at the center of the top end of the kettle body, a speed reducer is fixed at the top end of the sealing seat through a flange and a screw, and a speed reduction shaft of the speed reducer penetrates through the sealing seat; a speed reducer is arranged in the kettle body, the top end of the speed reducer is in transmission connection with a stirring motor, the stirring motor is electrically connected with an external power supply through an electric wire, and a stirring shaft is vertically arranged at the center of the kettle body. According to the device, the stirring effect on fluid in the kettle body can be enhanced through automatic up-down swinging of the metal stirring rollers, synchronous swinging of the multiple stirring rollers is achieved through the linkage mechanism, stable and controllable swinging action is ensured through the driving mechanism, the mixing uniformity and reaction efficiency of materials in the oxidation kettle are remarkably improved, and the production cost is reduced. And the stirring requirements of high-viscosity and easily-layered materials are met. The oxidation kettle can be used for preparing an isocaprylic acid intermediate product sodium isocaprylate.

The invention relates to a composite fuel oil additive, fuel oil and application. The composite fuel oil additive comprises the following components in parts by mass: 1-8 parts of an isocaprylic acid metal substance, 1-5 parts of a transition metal ionic compound and 15-20 parts of a surfactant, the surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonyl naphthalene sulfonic acid and dodecylbenzene sulfonic acid. The composite fuel oil additive can obviously improve the combustion efficiency and the utilization rate of fuel oil / fuel oil and improve the stability of fuel oil components, so that the fuel oil / fuel oil can be fully combusted, generation of carbon emission particles is reduced, meanwhile, residual carbon deposits in a fuel oil / fuel oil engine can be cleared and decomposed, abrasive particle abrasion of the engine is reduced, and the service life of the engine is prolonged. The engine working efficiency is improved; meanwhile, the composite fuel oil additive disclosed by the invention is green and economic, is suitable for industrial production, and can be applied to the fields of ships and the like.

The invention discloses an anti-skid resin type artificial stone material which comprises the following raw materials in parts by weight: 10 parts of composite resin, 55-70 parts of modified stone aggregate, 10-25 parts of needle-like wollastonite, 0.4-0.8 part of a curing agent, 0.05-0.2 part of a catalyst and 0.05-0.2 part of a light stabilizer, the composite resin comprises unsaturated polyester resin and an anti-skid filler in a mass ratio of 9: 1-7: 3, and the anti-skid resin type artificial stone material is prepared from the following raw materials in parts by weight: 10 parts of modified stone aggregate, 10-25 parts of needle-like wollastonite, 0.4-0.8 part of a curing agent, 0.05-0.2 part of a catalyst and 0.05-0.2 part of a light stabilizer. The anti-skid filler is one of ethylene glycol acrylate, glyceryl acrylate and acrylic acid modified sorbitol, the modified stone aggregate is formed by modifying stone aggregate through a stone aggregate modifier, and the catalyst is one of cobalt naphthenate, cobalt iso-octoate and manganese iso-octoate. The invention further discloses a preparation method of the anti-skid resin type artificial stone material, optimization balance of the anti-skid performance and other key performance of the artificial stone material is achieved, the application value of the artificial stone material in building decoration can be improved, and the safety and attractiveness of building space can be remarkably improved.

The application provides a method for preparing lithium iron phosphate by using waste lithium isooctanoate catalyst, and comprises the following steps: grinding and sieving the waste lithium isooctanoate catalyst to obtain lithium isooctanoate powder; mixing the lithium isooctanoate powder with water, adding concentrated hydrochloric acid to perform leaching reaction to obtain leaching slurry; filtering the leaching slurry to obtain filtrate and residue; adding activated carbon to the filtrate to perform adsorption and filtration, then adding HCl and FeCl3·6H2O to stir, and controlling the pH of the solution to be 1.0-1.5 to obtain an aqueous phase; uniformly mixing tributyl phosphate and sulfonated kerosene to obtain an organic phase; mixing, oscillating, standing and separating the aqueous phase and the organic phase to obtain an extraction phase and a raffinate phase; washing the extraction phase by using dilute hydrochloric acid to remove impurities, adjusting the molar ratio of P, Fe and Li in the extraction phase after impurity removal, adding a carbon source to obtain mixed slurry; performing spray drying on the mixed slurry, and performing high-temperature sintering, crushing and screening on the powder obtained by spray drying to remove iron, so as to obtain lithium iron phosphate. The application scheme realizes resource recycling and utilization, and the prepared product has high quality and low cost.

The invention discloses weather-resistant and medium-resistant alkyd resin varnish and a preparation method thereof. The varnish is prepared from the following raw materials: modified alkyd resin, a composite drier, zirconium iso-octoate with the purity of 12%, an anti-skinning agent, 200 # solvent oil and xylene. The modified alkyd resin is prepared from the following raw materials: soya oil acid, pentaerythritol, benzoic acid, pyrrolidine-2-one-1-acetic acid, dimethylbenzene and a 200 # solvent. According to the invention, pyrrolidine-2-ketone-1-acetic acid is used as a binary acid component to partially or completely replace traditional phthalic anhydride, so that the reaction efficiency of alkyd resin synthesis can be improved, and the problems of yellowing, pulverization and poor water resistance of traditional alkyd resin can be solved; according to the varnish prepared by the invention, on the basis of maintaining the inherent gloss, flexibility and constructability of alkyd resin, the key properties such as weather resistance, water resistance and acid resistance are improved; the whole preparation process of the varnish continues to use mature alkyd resin production equipment and flow, and has good economical efficiency and industrial popularization prospects.

The invention provides a method for preparing amorphous avibactam sodium by an anti-solvent method, which comprises the following steps: dropwise adding a solution of sodium isooctoate into a solution of avibactam tetrabutyl ammonium salt, then concentrating, quickly pouring the concentrated solution into an anti-solvent system at one time, and quickly separating out an amorphous solid. The amorphous avibactam sodium is prepared through anti-solvent precipitation, the process is stable and controllable, and the prepared product is high in purity and yield and can be stably stored; the method is simple in steps, and the solvent is a common solvent, so that the production cost is greatly reduced; generation of a large amount of acidic and alkaline wastewater is greatly reduced, and pollution to the environment is reduced; and the method has the advantages of short production period and low energy consumption, meets the requirements of large-scale production, and provides a feasible scheme for industrial production of the avibactam sodium amorphous product.

The invention relates to the field of lubrication of ball screws, in particular to long-life creep-resistant lubricating grease for a high-precision ball screw, which comprises the following components in parts by weight: 65 parts of polyolefin, 5-10 parts of pentaerythritol ester, 5-10 parts of isocyanate, 2-5 parts of amine chain extender, 5 parts of PTFE (polytetrafluoroethylene), 1.0-1.5 parts of diphenylamine, 0.1-0.5 part of 2, 4-diphenyl-1, 3-pentanediol monoisobutyrate, 0.1-0.5 part of antioxidant, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant. The composite material is prepared from the following components in parts by weight: 0.5 to 1 part of 2, 6-butylated hydroxytoluene, 1.5 to 2 parts of molybdenum isocaprylate, 0.5 to 1 part of molybdenum bis (2-ethylhexyl) dithiocarbamate, 1 to 2 parts of zinc dialkyl dithiophosphate, 3 parts of calcium petroleum sulfonate, 1 to 1.5 parts of polyisobutene, 0.2 to 0.5 part of benzotriazole and 0.1 to 0.3 part of polymethacrylate. The isocyanate comprises HDI and IPDI, and the amine chain extender comprises TETA and TEPA. According to the invention, isocyanate and the amine chain extender react to form a polyurea macromolecular chain, and a high-energy hydrogen bond network is formed, so that the lubricating grease has relatively high creep resistance; the anti-creep performance is further enhanced through cooperation with the PTFE particles; meanwhile, through cooperation with diphenylamine, the oxidation resistance is promoted, the consumption is reduced, and the service life of the lubricating grease is longer.

The invention belongs to the technical field of synthesis of organic compounds, and relates to a synthesis method of ticarcillin sodium. The synthesis method comprises the following steps: a condensation reaction step: in a nitrogen atmosphere, in an organic solvent and in the presence of N, N-bis (trimethylsilyl) urea, carrying out a reaction on 6-aminopenicillanic acid and 2, 2-dimethyl-5-(3-thienyl)-1, 3-dioxane-4, 6-diketone to generate ticarcillin, and filtering to obtain a solution containing ticarcillin; and a salt forming reaction step: carrying out a one-step salt forming reaction on the obtained solution containing ticarcillin and a sodium isooctanoate solution to obtain ticarcillin sodium. In the synthesis process, no acid or alkali is used for adjusting the pH value, so that open-loop degradation of a lactam ring in a ticarcillin structure is avoided; no water is added in the synthesis process, an organic solvent is used in the whole process, and other impurities generated by hydrolysis reaction are avoided; meanwhile, tedious steps such as extraction or reduced pressure distillation are not needed, the preparation process is easy and convenient to operate, the yield is high, the purity is high, and large-scale production is easy.

The invention belongs to the technical field of cooling liquid. The invention provides a mixed organic engine coolant and a preparation method thereof, and the mixed organic engine coolant comprises the following components by mass: 75-80% of ethylene glycol, 8-10% of a polyethylene glycol-isocaprylic acid copolymer, 2-3% of a chelating agent, 0.8-1.0% of a corrosion inhibitor, 0.1-0.3% of an antifoaming agent and the balance of deionized water. The polyethylene glycol-isocaprylic acid copolymer is prepared by copolymerization of polyethylene glycol and isocaprylic acid, the polyethylene glycol is PEG-2000, and the molecular weight of the polyethylene glycol is 2000. The mixed organic engine coolant can ensure that the metal corrosion resistance of the mixed organic engine coolant is excellent when the mixed organic engine coolant encounters hard water.

The application discloses a high-flash-point fireproof coating based on heat-resistant phenyl phosphine oxide and a preparation method thereof, and relates to the technical field of fireproof and flame-retardant coating.The high-flash-point fireproof coating based on heat-resistant phenyl phosphine oxide comprises the following components in parts: heat-resistant phenyl phosphine oxide 10-15 parts, cobalt isooctoate 1-3 parts, methyl ethyl ketone peroxide 0.2-1 part, epoxy resin 140-160 parts and curing agent 90-110 parts; the epoxy resin is epoxy resin 828 or epoxy resin 815 or epoxy resin C 14 H 20 O4.The heat-resistant phenyl phosphine oxide contains phosphorus with flame-retardant effect and has a high thermal decomposition temperature; as a flame-retardant additive, the heat-resistant phenyl phosphine oxide can improve the thermal stability of the coating, thereby avoiding early degradation of the polymer and improving the flash point of the coating, and the flash point is greater than 60 DEG C.

The application discloses a resin gold paste suitable for a printing transfer process, wherein the resin gold paste is composed of the following components in mass fraction: 20-50% of vulcanized benzoin gold, 0.5-3% of bismuth cyclopentanate, 0.1-1% of copper isooctanoate, 0.1-1% of rhodium isooctanoate, 5-30% of a high polymer resin, 0.3-4% of an additive and the rest of a solvent; the additive is composed of an additive A and an additive B, the additive A is one or more of polyethylene wax paste, polyamide wax paste, bentonite and hydrogenated castor oil, the additive B is one or more of a silicone lubricant, stearic acid amide and oleamide, and the mass ratio of the additive A to the additive B is 1:0.3-0.4. The resin gold paste is particularly suitable for the printing transfer process, has good printing performances such as rheological properties and screen passing properties, effectively reduces the phenomena of plate sticking, screen blocking and broken lines during continuous printing, and has high printing resolution, and is particularly suitable for being used as the resin gold paste for the printing transfer process.

The invention discloses a method for preparing isooctanoic acid by selective oxidation of isooctyl alcohol, and belongs to the technical field of preparation of isooctyl acid of fine chemicals. The invention uses sodium lignin sulfonate quaternary ammonium salt loaded with phosphotungstic acid as a catalyst, isooctyl alcohol as a raw material, and H2O2 as an oxidant, and synthesizes isooctyl acid by solvent-free one-step reaction. The method for preparing isooctyl acid by selective oxidation reaction of isooctyl alcohol provided by the invention has the advantages of being direct, efficient, and green. Compared with the prior art, the sodium lignin sulfonate quaternary ammonium salt catalyst loaded with phosphotungstic acid prepared and used by the invention and the product isooctyl acid can be separated by a simple solid-liquid separation means, which not only overcomes the defects of needing to use a large amount of strong oxidants (potassium permanganate, nitric acid, etc.) and noble metal catalysts in the process of synthesizing isooctyl acid, and polluting the environment, but also can achieve a high conversion rate of isooctyl alcohol and a high yield of isooctyl acid.

The application belongs to the technical field of cooling liquid, and provides a mixed organic engine cooling liquid and a preparation method thereof.The cooling liquid comprises the following components in percentage by mass: 75-80% of ethylene glycol, 8-10% of polyethylene glycol-isooctanoic acid copolymer, 2-3% of chelating agent, 0.8-1.0% of corrosion inhibitor, 0.1-0.3% of defoaming agent and deionized water in remainder; the polyethylene glycol-isooctanoic acid copolymer is prepared from polyethylene glycol and isooctanoic acid, and the polyethylene glycol is PEG-2000 with a molecular weight of 2000.The application can ensure that the mixed organic engine cooling liquid has excellent metal corrosion prevention performance when meeting hard water.

The invention belongs to the technical field of pharmacy, and relates to a method for recovering effective components from ampicillin sodium crystallization mother liquor, which comprises the steps of diisopropylamine recovery, ampicillin trihydrate acid recovery and sodium isooctanoate recovery. According to the method, the diisopropylamine, the ampicillin trihydrate and the sodium isooctanoate are effectively recovered from the solvent-method ampicillin sodium crystallization mother liquor, the recovery rates of the diisopropylamine, the ampicillin trihydrate and the sodium isooctanoate recovered by the method are all higher than 80%, and the quality of the recovered product is good. According to the method, various effective components of the ampicillin sodium crystallization mother liquor are effectively recovered, the production cost can be greatly reduced, meanwhile, the discharge amount of sewage is reduced, and the economic benefits and social benefits of enterprises are improved.

The invention provides a method and a device for synthesizing stannous octoate. The method provided by the invention comprises the step of reacting tin and isocaprylic acid in the presence of an antioxidant and oxygen-containing gas to obtain a reaction solution containing stannous octoate. According to the method and the device disclosed by the invention, stannous octoate with high purity and high yield can be obtained from tin and isocaprylic acid at normal pressure in one step, and a byproduct is only water, so that the method and the device are green and efficient.

The invention discloses application of a nutritional composition containing alpha-hydroxyisocaproic acid in weight management and blood fat improvement, and belongs to the fields of biological medicine manufacturing, biological medicine application and functional food development. The nutritional composition comprises alpha-hydroxyisocaproic acid and at least one second functional nutritional component, and the second functional nutritional component is preferably selected from one or more of the following components: 1) one or more of tea polyphenol and capsaicin; 2) one or more of beta-glucan, inulin and resistant dextrin; 3) one or more of medium chain triglyceride and sn-1, 3 diglyceride; under the condition of the same intake cycle and dosage, the nutritional composition can significantly improve the weight management effect and reduce related indexes of blood fat through a multi-way synergistic effect, and is combined with GLP-1 drugs or sequentially applied to weight management so as to reduce the risk of weight rise after drug withdrawal.

The invention provides an ultrahigh-base-number composite calcium salt detergent, a preparation method thereof and a lubricating oil complexing agent. The preparation method comprises the following steps: mixing solvent oil, base oil, an accelerant A, an accelerant B, sulfonic acid, salicylic acid, first inorganic calcium and an accelerant C for neutralization reaction; carbon dioxide is introduced, second inorganic calcium and water are added for a carbonation reaction, a product is purified after the reaction is finished, and the composite calcium salt detergent is obtained; the accelerant B is selected from a combination of two or more than three of polyisobutylene succinic anhydride, dodecenyl succinic anhydride, polymethacrylate, trimethylolpropane isooctoate, alkylphenol formaldehyde resin and benzylamine. The composite calcium salt detergent disclosed by the invention has the advantages of ultrahigh base number and better thermal stability, and can fundamentally improve the problem of precipitation when calcium sulfonate and calcium salicylate are compounded.

The application relates to the chemical process field and discloses a catalyst with a function of reducing chroma and a method for preparing isooctanoic acid. The catalyst and the method for synthesizing isooctanoic acid can reduce the chroma of isooctanoic acid products and downstream products prepared by using isooctanoic acid as raw materials after long-time storage, improve product quality, reduce the requirement of the raw material storage environment, thereby reducing the cost and improving the benefit.

The invention belongs to the technical field of automotive interior materials, and particularly relates to a low-VOC automotive interior material and a preparation process thereof. The material is prepared from the following raw materials in parts by weight: 80 to 90 parts of polyether polyol, 100 to 110 parts of toluene diisocynate, 10 to 15 parts of epoxy resin, 5 to 8 parts of terephthalic acid, 0.5 to 1 part of Zn modified graphene, 3 to 5 parts of water, 1 to 3 parts of foaming agent and 0.1 to 0.5 part of bismuth isooctoate. In the process of generating polyurethane through the reaction of polyether polyol and isocyanate, the epoxy resin, terephthalic acid and Zn modified graphene are used as auxiliaries, so that excellent mechanical properties can be obtained, volatilization of VOC molecules can be effectively reduced, and the polyurethane material is safer and more environmentally friendly and has a wide market prospect.

The invention discloses modified alkyd resin enamel paint and a preparation method thereof, and relates to the technical field of alkyd resin paint. The modified alkyd resin enamel paint is prepared from the following raw materials: fluorosilicone acrylic acid composite modified alkyd resin, scarlet powder, precipitated barium sulfate, a composite drier, zirconium iso-octoate with the purity of 12%, an anti-skinning agent and xylene. The fluorosilicone acrylic acid composite modified alkyd resin is prepared from basic alkyd resin, an acrylic acid prepolymer, vinyltriethoxysilane, 4-(2, 2-difluoroethyl) benzoic acid, an initiator, a solvent and a catalyst. The fluorosilicone acrylic acid composite modified alkyd resin is formed through step-by-step reaction of the acrylic acid prepolymer, the vinyltriethoxysilane and the 4-(2, 2-difluoroethyl) benzoic acid, so that the weather resistance, the water resistance, the pollution resistance and the adhesive force of a coating are improved, the modified alkyd resin still has good leveling property, the cost is prevented from being out of control, and the service life of the coating is prolonged. And both economy and practicability are considered.

A method for recovering effective components from oxacillin sodium mother liquor belongs to the technical field of medicine manufacturing, and comprises the following steps: S1, heating the oxacillin sodium mother liquor, and carrying out reduced pressure distillation; adding water into the kettle residue, stirring, standing for layering, and obtaining a water phase for later use; s2, activating anion exchange resin; s3, adding the water phase obtained in the step S1 into the anion exchange resin treated in the step S2, starting adsorption, washing with water to be neutral after adsorption is completed, eluting with 1%-5% sodium hydroxide, and collecting liquid which is an oxacillin sodium water solution; s4, heating the oxacillin sodium aqueous solution to 40 DEG C, adding hydrochloric acid, adjusting the pH value to 3.0-4.0, and preserving heat and growing crystals for 1 hour; dropwise adding hydrochloric acid, adjusting the pH value to 1.5-2.5, cooling and growing crystals for 2 hours, and drying to obtain oxacillin acid solid; s5, dissolving the oxacillin acid solid in a 95% alcohol solvent, dropwise adding a sodium isooctanoate solution, and crystallizing after dropwise adding; cooling and growing crystals for 2 hours, filtering to obtain a wet material, and drying to obtain oxacillin sodium. The method is easy to implement, and the product quality is stable.

The invention relates to the technical field of polyester resin, and discloses a preparation process of tin-free environment-friendly polyester resin, which is characterized in that dihydric alcohol, dibasic acid, a catalyst, an antioxidant, an acidolysis agent, a curing accelerator and the like are reacted to obtain the tin-free environment-friendly polyester resin. According to the invention, bismuth iso-octoate and 4-dimethylaminopyridine form a compound catalyst to replace a traditional organic tin catalyst, so that the tin-free environment-friendly polyester resin is obtained, and the blank of the tin-free environment-friendly polyester resin is filled. The toxic and side effects are effectively reduced, the environmental pollution is reduced, and the requirements of environment-friendly polyester resin are met. Meanwhile, tris (2-hydroxyethyl) benzene-1, 3, 5-triformate is added to participate in esterification polycondensation reaction, contains a plurality of hydroxyl crosslinking polymerization sites and a heat-resistant benzene ring structure, and is crosslinked into polyester resin molecules, so that the glass-transition temperature, the heat stability and the biodegradability of the resin can be improved.

The invention provides a multifunctional environment-friendly dust suppressant and a preparation method thereof, and relates to the field of dust control. The coating comprises a solution A and a solution B. The solution A comprises the following raw materials in percentage by mass: 5-10% of polyether polyol, 3-5% of isocyanate, 5-10% of carboxymethyl cellulose, 1-5% of a nonionic surfactant, 1-2% of a humectant, 1-2% of a film-forming agent, 1-2% of bentonite and the balance of water. The solution B is prepared from the following raw materials in percentage by mass: 1 to 3 percent of 2-amino-fluorobenzylamine, 0.5 to 1 percent of bismuth isooctoate, 5 to 10 percent of modified starch, 1 to 5 percent of polyvinyl alcohol and the balance of water. The polyether polyol and the isocyanate in the raw materials can form a polyurethane curing layer under the action of the catalyst, and hydroxyl groups in the modified starch and the polyvinyl alcohol in the raw materials can participate in the reaction of polyurethane to form the polyurethane curing layer with a three-dimensional network structure, so that the strength of the curing layer is improved.

The invention provides high-stability organic cooling liquid and a preparation method thereof, and relates to the technical field of cooling liquid. The organic cooling liquid is prepared from the following raw materials in parts by weight: 40 to 45 parts of ultrapure water, 50 to 55 parts of ethylene glycol, 0.3 to 0.5 part of methylbenzotriazole, 0.8 to 1 part of isocaprylic acid, 0.5 to 1 part of tetradecanedioic acid, 0.2 to 0.5 part of disodium ethylene diamine tetraacetate, 0.08 to 0.15 part of phenothiazine, 1.0 to 1.5 parts of triethanolamine, 0.1 to 0.2 part of polyether modified siloxane and 5.5 to 6.8 parts of a polyester mixture. The polyester mixture is prepared by mixing dioctyl adipate, glycerol and tributyl citrate, and the polyester mixture is obtained. The preparation method of the high-stability organic cooling liquid comprises the following steps: preparing the polyester mixture, adding the polyester mixture, adding the corrosion inhibitor, and adding the auxiliary agent. The high-stability organic cooling liquid disclosed by the invention has the advantages of excellent stability, relatively low corrosivity and relatively low conductivity.

The invention relates to the technical field of production of penicillin V potassium, and particularly discloses a novel process for preparing penicillin V potassium, which comprises the following steps: a) carrying out flocculation treatment on penicillin fermentation liquor, and passing through drum filtering equipment; b) passing the drum filtrate through a roll-type ultrafiltration membrane device, and acidifying and crystallizing the roll-type ultrafiltration membrane to obtain penicillin V acid crystals I; c) recrystallizing the penicillin V acid crystal I to obtain a penicillin V acid crystal II; d) reacting and crystallizing the penicillin V acid crystal II and potassium isooctanoate to obtain penicillin V potassium; e) drying and storing; the molar yield and the quality index of the penicillin V potassium obtained by the novel process are greatly improved compared with those of the existing level.

The invention discloses a method for preparing stannous octoate by sectional distillation, which comprises the following steps: adding isocaprylic acid, metallic tin, a catalyst and an antioxidant into a reaction container in proportion, heating to promote the reaction of the materials, and directly synthesizing a stannous octoate crude product; and carrying out two-stage reduced pressure distillation on the stannous octoate crude product, respectively distilling for 5-10 minutes under the conditions that the temperature is 60-70 DEG C and the pressure is 0.02-0.03 MPa, and then distilling for 15-20 minutes under the conditions that the temperature is 90-100 DEG C and the pressure is 0.06-0.08 MPa to obtain the stannous octoate product. The production process is simple, the utilization rate of raw materials such as metallic tin and isocaprylic acid is high, the production cost is low, the method is green and environment-friendly, the stannous octoate product is easy to separate, and the obtained stannous octoate product is good in quality.

An unsaturated polyester resin for diamond resin and its preparation method are disclosed, belonging to the technical field of polyester resins. It is composed of the following components: maleic anhydride, DCPD, DEG, EG, antioxidant, polymerization inhibitor, paraffin wax, styrene, composite accelerator, and water; the composite accelerator is composed of cobalt isooctanoate, copper isooctanoate, and potassium isooctanoate in a weight ratio of 1:2 to 4:6. The preparation steps are: 1) Add maleic anhydride, DEG, antioxidant, and water; heat and add DCPD, maintaining the temperature; 2) Add EG, MA, DEG, antioxidant, and polymerization inhibitor; heat and react; 3) Cool and add polymerization inhibitor and paraffin wax; cool and add styrene and the composite accelerator to obtain the unsaturated polyester resin for diamond resin; the composite accelerator is obtained by premixing cobalt isooctanoate, copper isooctanoate, and potassium isooctanoate in a weight ratio of 1:2 to 4:6 at 25 to 60°C. This invention features excellent mechanical properties, good air-drying properties, high solids content, and low linear shrinkage.

The invention discloses an aniline pyridine amino zinc catalyst and a preparation method and application thereof, belonging to the technical field of polyester catalysts. The invention can directly utilize an aniline pyridine amino ligand to react with a zinc source, and directly drain the solvent after the reaction to obtain a corresponding catalyst. The invention also utilizes the synthesized catalyst to catalyze cyclic ester monomers to prepare biodegradable aliphatic polyesters, and the monomer conversion rate is greater than 90%. Compared with the currently commercialized stannous isooctanoate catalyst, the aniline pyridine amino zinc complex provided by the invention has higher catalytic activity and lower biological toxicity, and has good application prospects.