13 results about "Leather industry" patented technology

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 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.

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.

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.

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 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.

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.