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100results about How to "Improve tanning effect" patented technology
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High-fire-retardancy aminoresin nano-complex-function tanning agent
The invention discloses a tanning agent with high flame-resistance amino-resin nano-composite function, which is prepared by the method as follows: firstly, melamine, dicyandiamide, formaldehyde and acidic components are used as raw material to prepare flame-resistance amino-resin prepolymer; secondly, montmorillonite or organic montmorillonite are modified by tetrakis hydroxymethyl phosphonium and silane coupling agents to obtain modified montmorillonite or modified organic montmorillonite; finally, the prepared flame-resistance amino-resin prepolymer and the obtained modified montmorillonite or the modified organic montmorillonite are processed through in-situ intercalation compounding reaction. The tanning agent not only has better tanning performance and retanning filling performance, but also brings good flame-resistance and washable migration resistance to leather goods, and the addition quantity is less, and the flame retardant efficiency is high.
Owner:SICHUAN UNIV
Preparation method of carboxyl-containing epoxy resin tanning agent
A preparation method of a carboxyl-containing epoxy resin tanning agent comprises the steps: adding a sodium hydrogen sulfite aqueous solution into a reactor, then heating to 50-65 DEG C, dropwise adding allyl glycidyl ether, methacrylic acid and an ammonium persulfate aqueous solution with stirring, followed by carrying out a constant temperature reaction for 3-5 h at the temperature of 50-65 DEG C, finally, cooling to the room temperature, regulating the pH value of the obtained reaction system to 2.0-5.5, and thus obtaining the carboxyl-containing epoxy resin tanning agent. The preparation method of the tanning agent is simple and convenient in operation process; the tanning agent has a certain tanning effect and is combined with 3% of a chromium powder to tan sheep skin acid skin, the shrinkage temperature of crust leather after being tanned is allowed to reach about 110 DEG C, and the thickening rate is allowed to reach about 105%; and at the same time, compared with a 8% chromium powder traditional tanning method, the Cr2O3 content in waste liquid after chrome tanning is reduced by about 77.5%.
Owner:SHAANXI UNIV OF SCI & TECH
Preparation method of chromium-free tanning agent
ActiveCN106674141AImprove tanning effectImprove performanceOrganic chemistryTanning treatmentChromium freeBenzaldehyde
The invention relates to a preparation method of a chromium-free tanning agent, comprising the following steps: adding a hydrophilic group containing active compound and deionized water into a four-necked flask, neutralizing with sodium hydroxide, continuously stirring till dissolution, putting into an ice bath, adding cyanuric chloride, and regulating the pH value of the system with a solution of an acid binding agent to obtain a mixture A; heating the mixture A, dropwise adding p-hydroxy benzaldehyde dissolved in acetone while stirring, regulating the pH value of the system with the solution of the acid binding agent, and continuing the reaction after the materials are added; heating the system, dropwise adding p-hydroxy benzaldehyde dissolved in acetone, regulating the pH value of the system with the solution of the acid binding agent, continuing the reaction after the materials are added, cooling and discharging to obtain a mixture B; and filtering the mixture B, carrying out vacuum drying on the filter cake to obtain solid C, grinding and pulverizing the solid C to obtain the white powdered form chromium-free tanning agent. The chromium-free tanning agent can eliminate pollution from chromic salt, aluminum salt and formaldehyde and can be well absorbed, and the tanned crust leather has a white fine grain surface and is easy to be dyed into light-colored leather.
Owner:SHAANXI UNIV OF SCI & TECH
Preparation method of modified Chinese gall tanning extract environmentally-friendly leather tanning agent
The invention relates to a preparation method of a modified Chinese gall tanning extract environmentally-friendly leather tanning agent. Graft modification is performed on a Chinese gall tanning extract with p-hydroxy benzenyl sulfonate sodium and nekal under the catalytic action of horseradish peroxidase / H2O2 so as to obtain the environmentally-friendly leather tanning agent. The nekal is introduced into the leather tanning agent, so that the dissolubility of the Chinese gall tanning extract and the penetrability of the Chinese gall tanning extract in a leather fiber can be improved remarkably; and the p-hydroxy benzenyl sulfonate sodium is introduced, so that the tanning effect of the Chinese gall tanning extract can be enhanced. When the modified Chinese gall tanning extract related bythe invention is applied to major tanning, the shrinkage temperature can be raised to be 70 and 75 DEG C and leather thickening effect is remarkable; when the Chinese gall tanning extract is applied to retanning, the Chinese gall tanning extract has high seepage velocity, the leather body of finished leather is full, has moderate elasticity and fine grain surface, and incision fibers have high dispersibility and light colors; and the product is beneficial to the realization of environmentally-friendly leather production and plays a positive role in reducing pollution caused by leather tanning.
Owner:南通安广美术图案设计有限公司
Composition of tanning agent containing modified tara mimosa extract, and bating method without chrome
InactiveCN1760377AImprove solubilityImprove permeabilityTanning treatmentOrganic phosphorusMimosa Extract
A tanning agent containing modified Tara tannin extract contains proportionally modified Tara tannin extract, non-Cr metal salt and organic phosphorus salt. Its tanning method features that the bare leather must be immersed in acid before tanned.
Owner:SICHUAN UNIV
Oxidized graphene and trivalent chromium composited tanning agent and preparation method thereof
ActiveCN104232808AImprove tanning effectImprove absorption rateTanning treatmentChromium CompoundsPotassium dichromate
The invention discloses an oxidized graphene and trivalent chromium composited tanning agent. The oxidized graphene and trivalent chromium composited tanning agent is prepared from the following raw materials in parts by weight: 50-60 parts of oxidized graphene nanosheet dispersion liquid, 6-8 parts of potassium dichromate, 10-15 parts of sodium carbonate, and 0.5-0.1 part of a dispersing agent. The invention further discloses a preparation method of the oxidized graphene and trivalent chromium composited tanning agent. The leather tanning agent disclosed by the invention has the advantages of low dosage for tanning, high absorptivity and low residual amount of a chromium compound in the waste liquor; furthermore, the production technology for the tanning agent is special, the technical process is easy to operate, and the tanning agent is of a good application prospect.
Owner:苏州盛泽科技创业园发展有限公司
All-component wide-distribution organic polyaldehyde tanning agent and preparation method thereof
ActiveCN107217116AExcellent tanning performanceDoes not reduce tannabilityTanning treatmentPre-tanning chemical treatmentIodideIodine
The invention relates to an all-component wide-distribution organic polyaldehyde tanning agent and a preparation method thereof. The preparation method is characterized in that firstly, periodate is utilized to perform hydroformylation on polysaccharide and derivatives thereof under a proper condition, so as to retain all components of hydroformylated polysaccharide; secondly, an inorganic reducing agent is utilized to efficiently convert an iodine-containing compound into solid molecular iodine, and the solid molecular iodine is filtered and recycled; and finally, the hydroformylation product filtrate is subjected to heat treatment, so that the residual iodide is separated out in the form of steam, further absorbed by a NaOH solution and recycled, and the all-component wide-distribution organic polyaldehyde tanning agent is obtained. According to the all-component wide-distribution organic polyaldehyde tanning agent and the preparation method thereof, the technical problems that the conventional hydroformylated polysaccharide tanning agent is too narrow in molecular weight distribution and poor in tanning property, or contains the iodine-containing compound and affects the overall performance of leather after tanning are solved; besides, the prepared tanning agent retains all components of hydroformylated polysaccharide, the molecular weight distribution is wide, the shrinkage temperature of leather / fur after tannage can reach 85-90 DEG C, and the treated leather is pure white, full and soft.
Owner:SICHUAN UNIV +1
Chrome-free tanning method of alligator skin
The invention provides a chrome-free tanning method of alligator skin. The chrome-free tanning method comprises the following steps of (1) adding water and sodium chloride to a rotary drum or a paddle vat, adding a pickling alligator skin blank after the sodium chloride is dissolved, rotating the rotary drum or paddling a paddle plate for 5-10 minutes, and regulating the pH value of a mixed solution inside the rotary drum or the paddle vat to 3.4-3.7; (2) adding an organic phosphonium salt tanning agent, an alcamines compound and fatty aldehyde to the rotary drum or the paddle vat, then rotating the rotary drum or paddling the paddle plate for 10-20 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing till the alligator skin blank is fully impregnated; (3) regulating the pH value of the mixed solution inside the rotary drum or the paddle vat to 5.8-6.2, then rotating the rotary drum or paddling the paddle plate for 5-10 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing for 3-5 times, then standing for 6-12 hours, and then completely discharging the mixed solution; (4) adding the water and an oxidizing agent to the rotary drum or the paddle vat, then rotating the rotary drum or paddling the paddle plate for 5-10 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing for 3-5 times.
Owner:广西盟展鳄鱼科技开发有限公司
Preparation process of bovine blue wet leather
ActiveCN109628663AGood emulsifying and moisturizing effectImprove uniformityLeather manufacturingLeather clicking/perforating/clickingHair removalSalt free
The invention relates to the technical field of leather processing and provides a preparation process of bovine blue wet leather with a large leather area, broad growth patterns, great comprehensive performance and small environmental pollution. The bovine blue wet leather prepared by the preparation process of the bovine blue wet leather is large in width, broad in pattern, compact and fine in grain surfaces, consistent in color, uniform in thickness, soft, plump and elastic in leather body and high in physical strength. Moreover, the production process flow is simple and easy to implement, and the production cost is proper; in an implementation process, recycling of wastewater, preservation and removal of hair with less ash and sulfur, ammonia-free deashing and softening, salt-free pickling chrome tanning and other clean production technologies are also adopted. The water for tanning can be saved, the pollution of tanning is obviously reduced, the pollution disposal cost is lowered,considerable benefits of energy conservation and emission reduction are provided, and the preparation process is suitable for industrial production and use. The preparation process of the bovine bluewet leather specifically comprises the following steps of batching of bovine raw material leather, soaking in water, hair removal and expansion, beef removal, splitting, ash removal and softening, pretreatment, dewatering and peeling, soaking in acid and tanning with chrome and washing with water and discharging.
Owner:XUZHOU XINGNING LEATHER CO LTD
Method for tanning sheepskin through synergy of organic amine and epoxy resin composition tanning agent
ActiveCN107828923AImprove heat and humidity stabilityImprove tanning effectTanning treatmentLeather impregnationEpoxyFiber
The invention discloses a method for tanning sheepskin through synergy of organic amine and an epoxy resin composition tanning agent. The method comprises the steps that softened or acid removing sheepskin is processed by an organic amine bath lotion, and then the epoxy resin composition tanning agent is added for tanning. As the organic amine permeates into skin fibers, the organic amine can cooperate with the epoxy resin composition tanning agent to make amido of the organic amine and amido on skin collagen fibers have a reaction, a net-shaped crosslink structure is formed, and accordingly the damp heat resistance stability of leather is improved, the epoxy resin can serve as the main tanning agent to tan the sheepskin, the tanning performance is improved, the tanned sheepskin leather isclear in grain surface, rich in body, pure white in color and good in yellowing resistance performance, and the storage life of the tanned leather is longer than six months at the room temperature.
Owner:CHINA LEATHER & FOOTWEAR IND RES INST +1
Method for preparing basic chromium sulfate-chrome tanning agent by using lignite wax as reducing agent
InactiveCN103613134AImprove performanceReduced neutral salt contentTanning treatmentChromium sulfatesWaxReaction temperature
The invention discloses a method for preparing a basic chromium sulfate-chrome tanning agent by using lignite wax as a reducing agent. The method comprises the processes of primary oxidation, secondary oxidation and oxidation liquid modulation, wherein the primary oxidation comprises the steps of acidizing the lignite wax for 1 hour and then stirring and oxidizing for 4-6 hours; the secondary oxidation comprises the steps of acidizing the primary oxidation liquid for 20-40 minutes and then stirring and oxidizing for 2-3 hours; the method further comprises the steps of adding the primary oxidation liquid and the secondary oxidation liquid into a reaction kettle, determining the adding amount of an oxidizing agent and a reducing agent, adding the oxidizing agent and the reducing agent into the reaction kettle sequentially and slowly, strictly controlling the reaction temperature at 105-115 DEG C, stirring and oxidizing for 1-2 hours, standing, ageing, spray-drying and forming to obtain the basic chromium sulfate-chrome tanning agent. Compared with the pure sugar reducing agent, the neutral salt content of the basic chromium sulfate-chrome tanning agent is reduced by above 30 percent, the chrome absorption quantity of leather is enhanced, and the plumpness and humidity-resistant and heat-resistant stability of the leather are improved. The basic chromium sulfate-chrome tanning agent comprises organic micromolecular acid with a good masking effect, particularly sulfonated phthalic acid, so that the leather is plump and soft, and has elasticity, natural brightness and wax feel.
Owner:南通金庆美术图案设计有限公司
Preparation method of high-performance carbon nanotube modified chrome tanning agent
InactiveCN101880735AImprove the coordination effectLarge amount of bindingTanning treatmentCarbon nanotubeGlucose polymers
The invention provides a preparation method of high-performance carbon nanotube modified chrome tanning agent, which comprises the following steps of: after mixing a carbon nanotube with an acid solution, and ultrasonically processing the mixture to prepare a suspension; then, heating, condensing, refluxing, repeatedly washing and centrifugally separating until the pH value becomes neutral; subsequently, after dissolving dichromate in water, slowly adding sulfuric acid and the treated carbon nanotube; ultrasonically processing to prepare a stable suspension; taking glucose and adding water to dissolve the glucose; dropwise adding the water solution of glucose into the suspension containing dichromate while stirring so as to produce a carbon nanotube modified chrome tanning liquid in-situ; and finally, settling and placing for long time. The chrome tanning agent enhances the bonding force of chrome, increases the quality and the properties of leather, is friendly to environment, reduces pollution and decreases resource waste.
Owner:SHAANXI UNIV OF SCI & TECH
Aminated modified glycosyl aldehyde tanning agent and preparation method thereof
ActiveCN110241270AGood tanningRaise the isoelectric pointTanning treatmentAldehydeHigh concentration
The invention discloses an amino modified glycosyl aldehyde tanning agent, which is prepared from the following raw materials in parts by weight: 100 parts of a glycosyl aldehyde tanning agent and 4-10 parts of an amino compound; according to the preparation method of the amino modified glycosyl aldehyde tanning agent, after first-step reaction is finished, direct filtration and separation can be carried out to respectively obtain the high-concentration glycosyl aldehyde tanning agent and an iodate precipitate, the preparation process is simplified, and the preparation cost of the amino modified glycosyl aldehyde tanning agent is obviously reduced.
Owner:四川亭江新材料股份有限公司 +1
Preparation method of formaldehyde-free leather synthetic tanning agent
InactiveCN101781392AImprove tanning effectEasy to fillTanning treatmentSodium bicarbonateEnzymatic synthesis
The invention relates to a preparation method of a formaldehyde-free leather synthetic tanning agent by enzymatic synthesis. Firstly, p-hydroxybenzoic acid and poly hexanediol are reacted to produce ester, then p-hydroxybenzoic acid macrogol ester, p-hydroxybenzaldehyde and sodium phenolsulfonate are dissolved in deionized water, the pH value of the system is adjusted with a sodium bicarbonate solution, and finally copolymerization is carried out under the catalytic action of horseradish peroxidase (HRP) to obtain the formaldehyde-free leather synthetic tanning agent. Through ester producing reaction and combined polymerization, aldehyde group, carboxyl and phenolic hydroxyl which have tanning effect on leather collagen fibers and polyethylene glycol branched chains, sulfo group and the like which have the functions of penetration, lubrication and filling are introduced into the product structure, and the obtained product has moderate relative molecular weight, good permeability and high absorption rate, and is a pollution-free polymer tanning agent with green performance.
Owner:SHAANXI UNIV OF SCI & TECH
Method for preparing chromium-containing hydrotalcite nano tanning agent by using chromium tanning waste liquid
ActiveCN112094962ASolve the pollution of the environmentReduce pollutionTanning treatmentPhysical chemistryHydrotalcite
The invention discloses a method for preparing a chromium-containing hydrotalcite nano tanning agent from chrome tanning waste liquid, and aims to solve the problem that the chrome tanning waste liquid pollutes the environment. According to the technical scheme, the method for preparing the chromium-containing hydrotalcite nano tanning agent by utilizing the chrome tanning waste liquid comprises the following steps: utilizing the chrome tanning waste liquid, adopting a coprecipitation method, and controlling the molar ratio of divalent metal ions to chromium ions to prepare the chromium-containing hydrotalcite nano tanning agent. The chromium-containing hydrotalcite nano tanning agent prepared by the method has excellent tanning performance, the shrinkage temperature of tanned crust leather is greater than or equal to 85 DEG C, the tensile strength and the tearing strength are both improved, and the biodegradability of tanning waste liquid using chromium-containing hydrotalcite is improved.
Owner:SHAANXI UNIV OF SCI & TECH
Method for making book-binding leather from rabbit skin and book-binding leather made according to method
InactiveCN105543422AEfficient use ofReduce wasteTanning treatmentPre-tanning chemical treatmentDepilationsFine grain
The invention provides a method for making book-binding leather from rabbit skin. According to the method, preservative-treated rabbit skin or fresh rabbit skin is soaked in water and subjected to meat removal to obtain a rabbit skin blank as a raw material. The method comprises the following steps: (1) liming and depilation, (2) deliming, (3) pickling, (4) tanning, and (5) retanning, finishing and coating. The method provided by the invention provides a new way of utilization of rabbit skin, provides a reasonable way of effective and reasonable utilization of rabbit skin, especially low-end and defective rabbit skin, and can reduce the waste of rabbit skin resources and avoid environmental pollution caused by abandonment of low-end and defective rabbit skin. The invention further provides book-binding leather made from rabbit skin according to the method, the book-binding leather made from rabbit skin has full dermatome and flat and fine grain, has no obvious location difference, and cannot suffer from the problem of loose grain easily during the making and using process.
Owner:SICHUAN UNIV
Preparation method of broadly distributed multifunctional polysaccharide-based ligand metal complex tanning agent
Owner:SICHUAN UNIV
Fur tanning method based on bio-based epoxy active tanning agent
ActiveCN113234868AGood water solubilityPromotes chemical cross-linkingTanning treatmentPre-tanning chemical treatmentOrganic acidPulp and paper industry
The invention provides a fur tanning method based on a bio-based epoxy active tanning agent, the method comprises the processes of softening, pickling and tanning, or comprises the processes of softening and tanning, and comprises the following steps: (1) putting pretreated fur into softening liquid in a paddle-tumbler for softening; after softening, pickling and then tanning, or directly tanning after softening; (2) pickling: adding organic acid and inorganic acid into the softening liquid in the paddle-tumbler to form pickling liquid for pickling; and (3) adjusting the pH value of the pickled or softened bath liquid to 2.0-5.0, adding a tanning aid and a bio-based epoxy active tanning agent, paddling a paddle for 20-40 minutes, then intermittently paddling for 6-8 hours, standing for 12-15 hours, adding a basifier into the bath liquid to extract alkali, adjusting the temperature of the bath liquid to 35-50 DEG C, intermittently paddling for 2-3 hours, standing for 12-15 hours, and discharging the fur. According to the method, the problems of chromium and formaldehyde residues and pollution existing in an existing fur tanning method can be solved, and the quality of the fur plate and the fur quilt of the tanned fur can be improved.
Owner:NINGXIA WUZHONG JINGYI FUR PROD
Cationic cyanuric chloride derivative tanning agent and preparation method thereof
InactiveCN112778226AImprovement of cationic propertiesPromote absorptionOrganic chemistryTanning treatmentFiberWhite powder
Owner:SHAANXI UNIV OF SCI & TECH
Tanning machine for leather processing
ActiveCN109182619AImprove tanning effectTanning treatmentLeather/skins/hides/pelt chemical treatment apparatusPulp and paper industryVALVE PORT
The invention belongs to the field of leather processing, and particularly relates to a tanning machine for leather processing. The tanning machine for leather processing achieves the aims of continuously stirring leather in the soaking process and repeatedly tanning the leather in the soaking process and comprises a bottom plate, a supporting rod, an annular sliding rail, a sliding block, a tanning frame, a water outlet pipe, a water valve, a water draining pipe, an L-shaped mounting frame, an outer gear ring, a motor, a fixed plate, a first bearing pedestal, a first rotating shaft, a gear, asecond bearing pedestal, a worm, a first supporting rod, a third bearing pedestal, a second rotating shaft and a worm gear. The annular sliding rail is fixedly connected to one side of the top of thebottom plate through the supporting rod, and the L-shaped mounting frame is fixedly connected to the other end of the top of the bottom plate. The aims of continuously stirring the leather and repeatedly tanning the leather in the soaking process can be achieved.
Owner:WENLING TIANFA ELECTROMECHANICAL FITTINGS FACTORY
Leather tanning processing equipment capable of improving tearing strength
InactiveCN111100956AHigh tear strengthImprove tanning effectTanning treatmentLeather/skins/hides/pelt chemical treatment apparatusElectric machineMechanical engineering
The invention discloses leather tanning processing equipment capable of improving tearing strength. The equipment comprises a box body, an adjusting mechanism, a driving mechanism and a discharging mechanism, wherein a stirring motor is arranged at the midpoint of the top of the box body; the bottom end of an output shaft of the stirring motor penetrates through the box body and extends into the box body; and stirring blades are installed on the surface of the output shaft of the stirring motor and located in the box body. Through mutual cooperation of a movable plate, a rotating motor, a convex block, a buffer spring, a first air cylinder, a fixed plate, a first contact piece, a second contact piece, a collecting shell, a push plate, a second air cylinder and a screen, the stirring bladescan rotate and move up and down, so that the tanning effect is greatly improved, and the tearing strength of leather is improved; meanwhile, unloading is convenient, so that the tanned leather can beseparated from a tanning agent, the working efficiency is greatly improved, the labor force is reduced, and great convenience is brought to a user.
Owner:洪超荣
Novel additive for leather pickling procedure
InactiveCN106811557AAvoid damageAvoid pollutionTanning treatmentPre-tanning chemical treatmentOrganic acidSulfonate
The invention provides a novel auxiliary agent used in leather pickling process and usage of the novel auxiliary agent. This additive contains organic acid compounds, fatty alcohol polyoxyethylene ether surfactants, alkylbenzene sulfonate surfactants and calcium and magnesium ion chelates. This additive is used in the pickling process of the leather industry, which can effectively improve the absorption of chromium, reduce the use of chromium powder, and at the same time improve the yield and tensile strength of leather. In the low pH value, it can avoid the damage of high mechanical action to the leather surface, and can also improve the firmness, fineness and softness of the leather grain. Especially it has obvious effect on skin samples that have not been deashed in the previous process.
Owner:QINGDAO SENMEIKE CHEM TECH CO LTD
Gold plating process of bottom hair tip of Tibet lamb skin quilt
ActiveCN107267695ARaise the pHIncrease added valueTanning treatmentPre-tanning chemical treatmentAcetic acidReduction treatment
The invention discloses a gold plating process of a bottom hair tip of a Tibet lamb skin quilt. The gold plating process comprises the steps of degreasing, tanning, mordanting, bleaching, removing iron, plating gold and performing aluminum tanning. According to the process, bottom hair is degreased and tanned and then is mordanted, and the hair is bleached with a degreasing agent, ferrous sulfate and acetic acid by standing overnight, so that a pH value of tanning liquid is increased, the optimal tanning effect is achieved, and the hair is soft by utilizing a bleaching agent in a post-degreasing procedure. Additionally, when gold is plated on the tip of the skin quilt, reduction treatment is performed at moderate temperature with ammonium hydroxide, the bleaching agent, a hair protecting agent and hydrogen peroxide, and finally, a fatting agent is added by adopting aluminum tanning, so that the appearance of the skin quilt is enhanced, the skin quilt is glossy, and the skin quilt with moderate hair thickness has the sense of color layers. By adopting the gold plating process, the problem of singleness in dyeing the Tibet lamb skin quilt is solved, the hair is soft, the appearance of the skin quilt is enhanced, the skin quilt is glossy after being dyed and has the sense of color layers, the additional value of Tibet lamb skin products is increased, and the application range of the Tibet lamb skin products is enlarged.
Owner:NINGXIA WUZHONG JINGYI FUR PROD
Improved Tibet lamb skin clean production technology
ActiveCN107354245AEfficient removalEasy to prepareTanning treatmentPre-tanning chemical treatmentLiquid wasteFiltration
The invention relates to the technical field of Tibet lamb skin clean production, in particular to an improved Tibet lamb skin clean production technology which comprises the following steps: (1) pretreatment; (2) tissue fixation; (3) tanning treatment; (4) bleaching treatment; (5)dying treatment; and (6) liquid waste treatment. According to the improved Tibet lamb skin clean production technology, the tanning working procedure and the liquid waste treatment working procedure can effectively ensure the production quality of the Tibet lamb skin and the utilizing efficiency of chromium; the tanning extract and chromium react to form chromate flavone type polymer precipitate to facilitate chromate filtration and cleaning to production liquid waste and recycling of the liquid waste, so that the cleaning efficiency and the recycling efficiency of the liquid waste are improved to realize a better cleaning environmental protection effect, resource waste is reduced, and higher popularization and application value is realized.
Owner:宁夏成丰农业科技开发股份有限公司
Method for producing chamois leather using epoxidized oil
The invention belongs to leather process technology, in particular a method for producing chamois leather using epoxidized oil, comprising the following steps: putting the pretanned pelt or fur into the normal temperature controlled rotary drum, adding alkaline solution to adjust pH value into alkaline, draining the alkaline solution, and adding catalyst or accelerant and epoxidized oil into the rotary drum, keeping the temperature at a certain temperature for several times, after reacting, recycling the remaining oil, then washing using degreasant and / or alkali, then adjusting pH value, aluminum tanning, aldehyde tanning or other tanning, and then drying, dampening and milling, finally gaining the chamois leather. The invention enables epoxidized oil to directly react with collagen and fix oil on the hide fiber, so that the shortcoming that traditional oil tanning takes oil as raw material, instead of reactant is overcome, and oil oxidizing process of traditional chamois leather is omitted. The chamois leather produced by the method has advantages of high intensity, good flexibility, strong hygroscopicity and water-wash resistance, applicable for the leather for cleaning, filtering and washing clothes.
Owner:SICHUAN UNIV
Automatic tea leaf sun-drying system
PendingCN111217157AReduce lossIncrease production capacityConveyorsPre-extraction tea treatmentEngineeringMechanical engineering
The invention discloses an automatic tea leaf sun-drying system, and relates to the technical field of tea making equipment. The automatic tea leaf sun-drying system comprises a sun-drying field for sun-drying tea leaves and trays for containing the tea leaves, and further comprises a carrying device for carrying the trays. The carrying device is provided with wheels for moving one part or the whole of the carrying device, a driving mechanism for driving the wheels to run, and a horizontal component for lifting up the trays. Thus, the automation of the tea leaf sun-drying process is realized,the problem of secondary contamination during manual tea leaf sun-drying is reduced, and the tea leaf sun-drying quality is improved.
Owner:YUNNAN KUNMING SHIPBUILDING DESIGN & RESEARCH INSTITUTE +1
Method for tanning leather by external electric field
ActiveCN111118235AEasy to prepareWide variety of sourcesTanning treatmentPre-tanning chemical treatmentBoronic acidDiethylene glycol
The invention discloses a method for tanning leather by an external electric field. The method comprises the following steps: firstly, carrying out deacidification treatment on pickled leather; then adding an organochlorine tanning agent and a tanning aid, and tanning for the first time, wherein the organochlorine tanning agent is a mixture of (E)-4-(3,4,5-trichlorophenyl)butyl-3-enitrile and (E)-4,4'-(ethylene-1,2-diyl)bis(2,6-dichlorobenzoic acid), the (E)-4-(3,4,5-trichlorophenyl)butyl-3-enitrile is formed by reacting (3,4,5-trichlorophenyl)boric acid with 3-butyronitrile, and the tanningagent selects a mixture of N,N'-diallyl L-tartardiamide, diethylene glycol dimethacrylate and 2-hydroxyhexanedial; and then adding a zirconium tanning agent to carry out further tanning on the leather. In the whole tanning process, no chromium-containing substance is used, and chromium pollution cannot be generated, so the whole tanning process is green and environmentally friendly; the method hasa good tanning effect on the leather, so that the shrinkage temperature of the leather reaches 101 DEG C; and method makes the leather have high tearing strength and elongation at break.
Owner:WENZHOU UNIVERSITY
Zinc salt/graphene oxide nano composite tanning agent and preparation method thereof
ActiveCN105648124AStrong tanning agent effectImprove tanning effectTanning treatmentZinc saltsMaterials science
The invention discloses a zinc salt / graphene oxide nano composite tanning agent, made from the following materials according to parts by weight: 40-50 parts of graphene oxide nano-sheet suspension, 10-20 parts of a dispersing agent, 50-60 parts of zinc salt solution and 40-50 parts of deionized water; the invention also discloses a preparation method of the zinc salt / graphene oxide nano composite tanning agent; the green leather tanning agent prepare through the invention is useful in the tanning of various leathers, the leathers are tanned through multi-point chemical bond combination formed by active groups and collagen on the zinc salt agent graphene oxide in the zinc salt / graphene oxide nano composite tanning agent and through nano-effect of graphene oxide nano-sheets, the tanning effect has a significant increase compared with the method of using purely the zinc salt tanning agent or graphene oxide nano tanning agent, and the tanned leather has good softness and elasticity.
Owner:安徽翰邦科技咨询有限公司
No-pickling chrome-free tanning process based on multi-metal cooperation tanning agent
ActiveCN107201414AGood alkali resistanceImprove permeabilityTanning treatmentChloridePulp and paper industry
The invention relates to the technical field of tanning chemistry and engineering, and provides a no-pickling chrome-free tanning process based on a multi-metal cooperation tanning agent. Softened naked leather is pretreated, then, no-pickling chrome-free tanning is carried out, wet white leather manufactured through the no-pickling chrome-free tanning process based on the multi-metal cooperation tanning agent is fine and compact in grain side, uniform and full in color and flexible, rich and elastic in leather body, the shrinkage temperature exceeds 90 DEG C, and in the implementing process of the no-pickling chrome-free tanning process based on the multi-metal cooperation tanning agent, a chrome-contained material is not adopted, pickling operation is not carried out, the content of chloride ions in tanning waste liquid is reduced to below 300mg / L, the pollution and the danger of heavy metal chromium to the environment are reduced, in addition, the production process flow is simplified, the production period is shortened, production cost is reduced, and the process is the clean production process with the good industrialized prospect.
Owner:XINGYE LEATHER TECH CO LTD
Tanning device for leather processing
InactiveCN111270024AEven contactAvoid enteringTanning treatmentLeather/skins/hides/pelt chemical treatment apparatusElectric machineryProcess engineering
The invention discloses a tanning device for leather processing. The tanning device comprises a box body. A rack cavity, an up-down sliding cavity and a treatment cavity are formed in the box body; arack is fixedly mounted on the left end surface of the rack cavity; an up-and-down sliding block is arranged in the up-and-down sliding cavity in a sliding mode, an up-and-down sliding motor is fixedly installed on the up-and-down sliding block, an up-and-down sliding shaft is arranged on the up-and-down sliding motor in a backward power mode, an up-and-down sliding gear is fixedly installed on the up-and-down sliding shaft, and the up-and-down sliding gear is meshed with the rack. According to the device, leather can be in uniform contact with the tanning agent in a manner of shaking up and down in the soaking pool through the convex blocks and the tanning effect is good; the detachable large filter screen is laid in the soaking pool, garbage is prevented from entering the discharging pipeline and the garbage can be fished out; in addition, the tanning device is further provided with the hot air drying and exhausting device, air drying of leather is accelerated, impurities in air arecollected and pollution is reduced.
Owner:DONGYANG HAOMING CLOTHING CO LTD
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