28 results about "Leather industry" patented technology

The invention relates to the technical field of block chain application, in particular to a block chain-based shoe leather industry collaborative supply chain system, which comprises four modules, namely a raw material registration module, a data verification module, a risk pledge module and an integral scheduling module: the raw material registration module is used for solidifying and chaining a supplier identity hash and a digital twinning token through commitment and zero-knowledge proof; the data verification module generates topological risk indexes and unified vectors by utilizing event vision and spectral data and writes the topological risk indexes and the unified vectors into a processing segment chain; a risk pledge module adaptively adjusts an echo reservoir and a neural morphological network to calculate a default probability, and updates a weight on a chain in a homomorphic encryption mode; and the point scheduling module combines the reputation score, the pledge amount, the default probability and the discharge amount, decides carbon point transaction through reinforcement learning and entropy regularization Wharisstein distance, and writes a chain. According to the system, raw material traceability, process verifiability, risk quantifiability and carbon transaction automation are realized.

The invention relates to a leather industry wastewater advanced treatment method and device in the technical field of wastewater advanced treatment, the treatment method comprises the steps of pretreatment, ozone oxidation, denitrification treatment, aeration, Fenton reaction, precipitation, filtration and the like, and in discharged water, COD is smaller than or equal to 30 mg / L, the ammonia nitrogen content is smaller than or equal to 1.5 mg / L, the total nitrogen content is smaller than or equal to 6 mg / L, and the total phosphorus content is smaller than or equal to 0.3 mg / L. The treatment device comprises a pretreatment device, an ozone oxidation tank, a two-stage nitrification / denitrification tank, a Fenton fluidized bed reactor, a sedimentation tank and a turntable filter tank which are sequentially connected in series. The method is short in process flow, high in treatment efficiency and stable in removal efficiency, and can be used for deeply treating the leather industry wastewater, so that the COD (Chemical Oxygen Demand) in the discharged water is reduced to 30 mg / L or below, the ammonia nitrogen content is reduced to 1.5 mg / L or below, the total nitrogen content is reduced to 6 mg / L or below, and the total phosphorus content is reduced to 0.3 mg / L or below.

The invention relates to the technical field of synthetic leather industry, in particular to an integrated process and system for recycling VOCs from synthetic leather tail gas through multi-mode phase change condensation. The synthetic leather tail gas multi-mode phase change condensation VOCs recovery integrated process comprises the following steps: step 1, carrying out pre-condensation treatment on a mixed gas phase formed by VOCs and air to obtain a pre-condensed mixed gas phase; step 2, carrying out primary condensation treatment on the pre-condensed mixed gas phase, and converting part of DMF gas phase and a small amount of other gas phase in VOCs into liquid phase and recovering; and step 3, carrying out secondary condensation treatment on the uncondensed gas phase in the VOCs generated in the step 2, and converting the uncondensed gas phase in the VOCs into a liquid phase and recovering the liquid phase. According to the method, the recovery rate of the DMF gas phase in the VOCs is 99% or above through the multi-stage gradient condensation recovery process step, and the investment of a large amount of production cost is saved.

The present invention relates to the synthesis and production of biopolymer from natural waste - the husk of coconut and / or coir pith powder. More specifically it pertains to a novel multi-functional biopolymer obtained from the husk of coconut and / or coir pith powder, the fruit of Cocos nucifera with combinations of copolymer, crosslinker, and plasticizers for use in pharmaceutical, nutraceutical, cosmeceutical and leather industry. Lignin component from coconut husk was extracted, purified, studied for their physicochemical properties and processed into various biopolymers to be used as burn wounds dressings and leather substitutes.

The present application belongs to the field of leather industry production, and particularly relates to a method for high absorption chrome tanning by using cross-linking enzyme preparation. The method comprises the following steps: water immersion, unhairing and liming, deliming, softening, enzyme-assisted tanning, and acid immersion tanning. The enzyme-assisted tanning is assisted by using cross-linking enzyme preparation. The cross-linking enzyme preparation is not used in combination with the hydrolytic enzyme in the softening step. The cross-linking enzyme comprises glutamine transaminase (TG enzyme). The comprehensive activity of the cross-linking enzyme is controlled to be 1-30 U / ml in the application process, and the activity of the TG enzyme is controlled to be 1-20 U / ml. The process in the present application meets the environmental protection requirements. Firstly, the tanning agent absorption rate in the tanning process is successfully improved, and the waste discharge amount in the tanning process is reduced. Secondly, the cleaner cross-linking enzyme preparation is successfully used to replace the chemical auxiliary agent to improve the tanning agent absorption rate. Thirdly, the process operation is simplified.

The invention relates to the technical field of data processing, and particularly provides a green electricity scheduling method, system and device for a shoe leather industry and a storage medium, and the method comprises the steps: collecting the historical operation data of a device from a plurality of data sources of an industrial park, and constructing a device-level feature vector; then, through a two-layer clustering algorithm including K-Shape and DBSCAN, equipment is grouped into production unit clusters with unified energy consumption characteristics; then, by taking maximization of the green power consumption amount as a target, constructing and solving a mixed integer linear programming model, and generating a day-ahead scheduling scheme for each production unit cluster; then, through an equipment-level secondary optimization process, the cluster-level power plan is decomposed into equipment-level power setting or start-stop instructions meeting production constraints; and finally, issuing the instruction to an equipment controller for execution. According to the invention, the green power consumption rate is obviously improved, the power consumption cost is reduced, and efficient cooperation of green energy and industrial production is realized.

The application discloses a metal sulfide ion exchanger / collagen fiber composite aerogel and a preparation method and application of the metal sulfide ion exchanger / collagen fiber composite aerogel for removing Sr 2+ ions in an aqueous solution, and belongs to the technical field of new materials. The metal sulfide ion exchanger / collagen fiber composite aerogel is a sponge-like bulk material; the sponge-like bulk material is formed by interweaving a metal sulfide ion exchanger and collagen fibers. The composite aerogel has fast kinetic response, high adsorption capacity, excellent selectivity and a wide pH value adsorption activity range for removing Sr 2+ ions. The application of the composite aerogel for removing Sr 2+ ions in an aqueous solution not only solves the problems of poor operability and difficulty in recovery from a solution of an existing metal sulfide ion exchanger, but also realizes the reuse of leather industry waste (a source of collagen fibers). The composite aerogel has a wide application prospect in treating radioactive wastewater containing Sr.

The invention discloses an optimization method of a leather collagen chemical modification process. The optimization method comprises the following steps: S1, constructing a leather collagen chemical modification process optimization mathematical model; s2, carrying out optimization solution on a leather collagen chemical modification process; and S3, carrying out reliability evaluation on a solving result in the step S2. The method disclosed by the invention has the beneficial effects that manual intervention in the optimization process of the leather collagen chemical modification process can be reduced, so that the accuracy and the reliability of the optimization result of the leather collagen chemical modification process are improved, and fine management of the leather collagen chemical modification process is facilitated; and the extensive production mode of a leather enterprise is favorably converted into a saving production mode, so that the high-quality sustainable development of the leather industry is realized.

The functional zeolite chrome-free tanning agent comprises the following components: triglycidyl isocyanurate, a solvent, zeolite, ethanol, curcumin, a silane coupling agent and a catalyst, the preparation method comprises the following steps: modifying zeolite by using a silane coupling agent, compounding with curcumin, and finally carrying out a TGIC cross-linking reaction to obtain the tanning agent. The tanning agent has the characteristics of no chromium, no formaldehyde, antibacterial property, yellowing resistance, high mechanical strength and the like, the shrinkage temperature of tanned leather is greater than or equal to 85 DEG C, the antibacterial rate is greater than 95%, the tanning agent is suitable for a pickling-free process, the tanning efficiency and the finished leather quality are improved, the problems of single function and pollution of the existing chromium-free tanning agent are solved, and the green development of the leather industry is promoted.

The invention relates to a multifunctional biopolymer synthesized from coconut shell and / or coconut shell fiber wood pith powder and application thereof. The present invention relates to the synthesis and production of biopolymers from natural waste-coconut shell and / or coconut shell fiber wood pith powder. More specifically, it relates to a novel multifunctional biopolymer obtained from a copolymer, cross-linking agent and plasticizer combination with coconut shell and / or coconut shell fiber wood pith powder (coconut fruit) for use in the pharmaceutical, nutraceutical, cosmetic and leather industries. Lignin components are extracted and purified from coconut shells, physicochemical characteristics of the lignin components are studied, and the lignin components are processed into various biopolymers to be used as burn wound dressings and leather substitutes.

The invention discloses a leather collagen-based carbon-based composite material as well as a preparation method and application thereof, and the method comprises the following steps: uniformly mixing metal cations (Ti < 4 + >, Al < 3 + >, Co < 2 + > and the like) with leather collagen fibers by an inorganic tanning method to obtain precursor powder; placing the precursor powder in a high-temperature tube furnace, calcining at 600-1000 DEG C under the protection of inert gas, and etching through inorganic acid to obtain a carbon fiber material; and uniformly mixing the carbon fiber material with molybdenum salt, and carrying out heat treatment at 600-1000 DEG C to obtain the molybdenum carbide / carbon fiber composite material. According to the method disclosed by the invention, an organic carbon skeleton formed by heat treatment of the leather collagen fibers is utilized to carbonize a molybdenum source, and in-situ nitrogen doping is realized based on rich functional groups on the side chain of collagen, so that good hydrogen evolution reaction activity of the material is favorably realized. Meanwhile, the method disclosed by the invention develops a new application field for leather collagen fiber resources mainly used in the leather industry.

This invention relates to an in-situ polymerization method for preparing leather-based eutectic gels. The method uses acid-treated raw hides from the leather industry as raw materials. A deep eutectic solvent is prepared using choline chloride and glycerol in a molar ratio of 1:2. An impregnation solution consisting of monomers, an initiator, and the deep eutectic solvent is prepared. The acid-treated raw hides are placed in the impregnation solution and stirred at 10–30°C for 5–48 hours. Subsequently, the raw hides are heated at 40–70°C for 2–12 hours to obtain the leather-based eutectic gel. The leather-based eutectic gel prepared by this method inherits the original high mechanical strength and flexibility of animal hides, solving the problem of insufficient mechanical strength in traditional eutectic gels. It also retains the good conductivity and environmental stability of the deep eutectic solvent. The raw materials used in this preparation are natural, low in toxicity, biodegradable, inexpensive, green, and sustainable. The process is simple and easily industrialized.

The present invention discloses a method for preparing an integrated amphoteric wet-finishing material that changes color in response to pH. Specifically, the method comprises: synthesizing an amphoteric polymer (ADL) by free radical polymerization using acrylic acid, dimethyldiallylammonium chloride, and lauryl methacrylate as monomers; grafting rhodamine B-ethylenediamine, aminofluorescein, and aminopyrene onto the amphoteric polymer ADL, and mixing the three polymers to prepare the integrated amphoteric wet-finishing material. Red, green, and blue fluorescent groups are grafted onto the side chains of ADL, and the ratio of the three colors is adjusted using the principle of the addition of three primary colors to obtain an integrated wet-finishing material with different colors. This integrated wet-finishing material can be used to dye leather in a variety of colors. Furthermore, the integrated wet-finishing material effectively reduces the traditional three-step wet-finishing process to a single step, which has far-reaching significance for achieving cleaner production in the leather industry.

The utility model relates to the technical field of wastewater treatment, and discloses a device for treating wastewater in leather industry by using aerobic granular sludge, which comprises a micro-aerobic tank and an aerobic aeration tank, the micro-aerobic tank is communicated with the aerobic aeration tank, a solid-liquid separation device is arranged in the aerobic aeration tank, a drain pipe is connected onto the solid-liquid separation device, and the drain pipe is communicated with the aerobic granular sludge. A water distribution area is arranged at one end, far away from the aerobic aeration tank, of the micro-aerobic tank and is connected with a water inlet pipe; the bottom of the solid-liquid separation device is connected with a sludge return pipe, one end, far away from the solid-liquid separation device, of the sludge return pipe is connected with the micro-aerobic tank, the sludge return pipe is connected with a sludge return branch pipe, and the sludge return branch pipe is connected with a sludge recovery tank. According to the internal circulation of the solid-liquid separation device, aerobic granular sludge can be cultured, the content of microorganisms is increased, the wastewater is treated more efficiently, and meanwhile, the device has excellent settling performance, can effectively remove pollutants such as organic matters, nitrogen, phosphorus and the like in the leather wastewater, and reduces pollution to the environment.

Methods and apparatus for regenerating process waste from the leather manufacturing industry are described. Specifically, the invention relates to an apparatus and a method for recovering fibers from raw hide and leather waste, said fibers being suitable for spinning and for textile processes.

The invention discloses a method for chemically purifying aldehyde VOCs (volatile organic compounds) in leather, an aldehyde catching agent is added in a spraying manner in a pre-prime coating stage in a leather coating procedure, and the method specifically comprises the following steps: 1) adding semicarbazide hydrochloride, glycoluril, sodium lauroyl glutamate and polyacrylamide into deionized water, and uniformly stirring to obtain the aldehyde catching agent; 2) uniformly adding the aldehyde trapping agent prepared in the step 1) to the meat surface of the leather in a spraying manner in a pre-prime coating stage in a leather coating procedure, standing until the aldehyde trapping agent is absorbed, drying, and entering a subsequent procedure after drying; the chemical purification method breaks through the limitation of traditional physical adsorption, effectively inhibits environmental release of aldehyde VOCs in leather products through an in-situ chemical immobilization strategy, has the characteristics of high reaction efficiency (gt, 90%), strong environmental durability, excellent eco-friendliness and the like, and provides an innovative solution for control of volatile aldehyde pollutants in the leather industry.

The present invention introduces an integrated system for the leather industry, combining hide quality assessment with traceability. By inkjet printing unique machine-readable barcodes to hides and linking these to quality data obtained from imaging analyses, the system ensures accurate tracking and management of hides through IT system integration. The system comprises an apparatus, comprising a conveyor belt (11) for translating the hides along an operating line of the apparatus (10), an imaging station (14) configured for imaging each hide, and a coding station (13) configured for applying a unique machine-readable code to each hide.

A preparation method of a bimetallic cobalt catalyst based on waste leather scraps, taking chromium-containing waste leather scraps from a planing section of a leather factory as a carbon source, using an organic ligand 2-methyl imidazole as an intermediate, introducing metal cobalt on the surface of collagen fibers by an immersion stirring method, filtering and washing with ethanol, drying, and then preparing a chromium-cobalt bimetallic carbon-based catalyst through high-temperature calcination; the catalyst prepared in the application realizes resource utilization of chromium-containing waste leather scraps, more metal cobalt is introduced on the surface of fiber bundles by adding the intermediate, and the active center is increased; effective utilization of these leather wastes can relieve resource and environmental pressure and promote sustainable development of the leather industry and ecology; the preparation method is simple, conducive to further exploration of non-noble metal carbon-based catalysts, has bimetallic catalytic performance, saves resources, and has low energy consumption.

This invention relates to a method for preparing leather-based eutectic gels using chromium-free tanned leather blanks. The method uses chromium-free tanned leather blanks from the leather industry as raw materials. A deep eutectic solvent is prepared using choline chloride and glycerol in a molar ratio of 1:2. An impregnation solution consisting of monomers, an initiator, and the deep eutectic solvent is prepared. The chromium-free tanned leather blank is placed in the impregnation solution and stirred at 5–30°C for 4–48 hours. Subsequently, the chromium-free tanned leather blank is heated at 40–80°C for 2–12 hours to obtain the leather-based eutectic gel. The leather-based eutectic gel prepared by this method inherits the original high mechanical strength of the chromium-free tanned leather blank, solving the problem of insufficient mechanical strength in traditional eutectic gels. Furthermore, the mechanical properties of the leather-based eutectic gel can be effectively controlled by adjusting the type of chromium-free tanned leather blank and monomers, thereby meeting the requirements of different application environments. The raw materials of this invention are readily available and inexpensive, the preparation process is simple, and it is easy to industrialize.

The present invention belongs to the technical field of leather tanning, and discloses a salt-free and chromium-free tanning method. The method uses softened bare skin as raw material, and realizes an environmentally friendly and efficient tanning process by sequentially carrying out bio-based dialdehyde carboxylic acid pre-tanning, salt-free pickling and iron salt tanning. Among them, the amount of bio-based dialdehyde carboxylic acid added is 1wt%-5wt% of the weight of the bare skin, and the amount of iron salt added is 5wt%-30wt%. The dialdehyde group in the bio-based dialdehyde carboxylic acid can pre-tan and soften the bare skin, block the amino group and cross-link collagen, effectively prevent acid swelling, and realize salt-free pickling; its carboxyl group provides an additional binding site for the iron tanning agent, forming a strong cross-linking network and enhancing the tanning performance. In addition, the bio-based dialdehyde carboxylic acid can also scavenge free radicals and fix Fe 3+ , to avoid deterioration and deterioration of leather during storage. The present invention is not only environmentally friendly and has excellent tanning properties, but also has good storage stability for tanned leather, providing strong technical support for the clean transformation of the leather industry.

The present invention concerns an integrated system for the leather industry, combining hide quality assessment with traceability. The system ensures tracking and management of hides through IT system integration, by applying unique machine-readable codes (e.g., barcodes) to hides and linking these to quality data obtained from imaging analyses.

This invention belongs to the field of leather processing technology, disclosing an ultra-short process for high-quality leather production and the resulting leather. Using raw hides, tanned leather, or greige as raw materials, the process involves pre-drying, followed by impregnation with an ethanol solution containing Tween, extrusion, and treatment with a long-chain silane coupling agent, ultimately followed by low-temperature drying. The core of this invention lies in Tween's ability to effectively inhibit the hydrolysis reaction of the silane coupling agent when the moisture content of the hide is between 21% and 40%, preventing premature conversion to highly reactive silanols and ensuring that the silane coupling agent can penetrate evenly and deeply into the leather. Subsequently, by applying relatively mild temperature conditions (20-50°C) and with the assistance of appropriate moisture, the binding reaction between the silane coupling agent and the hide collagen proceeds efficiently and fully. This innovative method not only improves leather production efficiency but also significantly enhances the strength parameters of the leather, achieving the goal of efficient, energy-saving, and cost-controllable leather processing, bringing revolutionary technological progress to the leather industry.

The invention provides a leather industry perfluorinated and polyfluoroalkyl substance production and pollution discharge coefficient accounting method, device and equipment and a storage medium. Relates to the technical field of ecological environment pollution monitoring and management. The method comprises the steps of leather enterprise basic information collection, sample collection, sample pretreatment and detection, production and pollution discharge coefficient accounting and flux accounting. Wherein the input coefficients comprise a blue alum skin carrying coefficient, a workshop water contribution coefficient, a dyeing solution contribution coefficient and a spraying solution contribution coefficient; the process coefficients comprise a retanning process change coefficient, a dyeing process change coefficient, a drying process change coefficient and a spraying process change coefficient; the output coefficients comprise a wastewater residue coefficient, a leather adhesion coefficient, a leftover material carrying coefficient, a workshop air dissipation coefficient, a workshop air particulate matter fixation coefficient and a loss coefficient. According to the method, the blank of footprint data of perfluorinated and polyfluoroalkyl substances in the leather industry can be filled up, and a scientific basis is provided for formulating targeted environmental management and emission reduction measures.

The application provides a method, device and equipment for calculating the production and emission pollution coefficient of perfluoro and polyfluoro alkyl substances in the leather industry, and a storage medium. It relates to the technical field of ecological environment pollution monitoring and management. The method comprises collecting basic information of leather enterprises, sample collection, sample pretreatment and detection, production and emission pollution coefficient calculation and flux calculation. The input coefficient includes the blue alum skin carrying coefficient, the workshop water contribution coefficient, the dyeing solution contribution coefficient and the spraying solution contribution coefficient; the process coefficient includes the retanning process change coefficient, the dyeing process change coefficient, the drying process change coefficient and the spraying process change coefficient; the output coefficient includes the wastewater residue coefficient, the leather adhesion coefficient, the edge waste carrying coefficient, the workshop air dispersion coefficient, the workshop air particulate matter fixation coefficient and the loss coefficient. The application can fill the gap of footprint data of perfluoro and polyfluoro alkyl substances in the leather industry, and provide a scientific basis for formulating targeted environmental management and emission reduction measures.

The present invention discloses a reagent for treating high-ammonia-nitrogen wastewater, which comprises the following components in parts by weight: 8-12 parts of composite bacteria, 5-10 parts of D-sodium glucuronate, 40-60 parts of modified carrier, and 80-120 parts of nutrients. Compared with the prior art, the reagent for treating high-ammonia-nitrogen wastewater prepared by the present invention can effectively reduce pollutants such as ammonia nitrogen, COD, BOD, TSS, and SS, and is applicable to treating various types of organic wastewater with high salinity (1%-5%), solves the problem that it is difficult to meet the discharge standards for high-salinity sewage, and can be widely used in high-salinity sewage industries such as high-salinity petrochemical industry, high-salinity pharmaceutical industry, high-salinity paper-making industry, high-salinity leather industry, and high-salinity printing and dyeing industry.

This invention provides a triazine derivative having the structure shown in formula (1). This invention also provides a method for preparing the triazine derivative and its uses. The triazine derivative provided by this invention has a novel structure and is very suitable as a new type of leather tanning agent, achieving excellent tanning effects. Moreover, it eliminates the need for chromium powder, making it green and environmentally friendly, which is conducive to the transformation of the leather industry towards cleaner production. The triazine derivative provided by this invention uses inexpensive and readily available aniline derivatives, sulfonyl lactones, and trihalomycins as raw materials. The preparation process is simple, the reaction conditions are mild, the purification process is easy, and the yield of the target product is high. Therefore, it has strong industrial applicability and is suitable for large-scale production and application.

The present invention relates to the synthesis and production of biopolymer from natural waste—the husk of coconut and / or coir pith powder. More specifically it pertains to a novel multi-functional biopolymer obtained from the husk of coconut and / or coir pith powder, the fruit of Cocos nucifera with combinations of copolymer, crosslinker, and plasticizers for use in pharmaceutical, nutraceutical, cosmeceutical and leather industry. Lignin component from coconut husk was extracted, purified, studied for their physicochemical properties and processed into various biopolymers to be used as burn wounds dressings and leather substitutes.

The present application belongs to the technical field of tanning auxiliary agents, and particularly relates to a bio-based blue wet leather softening agent, a preparation method and application thereof. The present application uses a probiotic combination of yeast, compound lactic acid bacteria and bacillus as the fermentation strain, carries out liquid fermentation in a water-based medium containing carbon source, nitrogen source and phosphate, determines the L-lactic acid concentration to determine the fermentation endpoint, adjusts the pH of the system after fermentation is completed, and inactivates the system. The probiotic metabolites obtained are used as a softening agent. The results of the examples show that the softening agent can significantly improve the water filling efficiency of blue wet leather, shorten the softening time, ensure the softness and fiber dispersion of leather, has excellent biodegradability, low COD increment of wastewater, outstanding environmental friendliness, and meets the green and low-carbon development needs of the leather industry.