CN109593898A - It is a kind of based on the biomass-based amphoteric retanning agent and preparation method thereof with reactivity - Google Patents
It is a kind of based on the biomass-based amphoteric retanning agent and preparation method thereof with reactivity Download PDFInfo
- Publication number
- CN109593898A CN109593898A CN201910048456.8A CN201910048456A CN109593898A CN 109593898 A CN109593898 A CN 109593898A CN 201910048456 A CN201910048456 A CN 201910048456A CN 109593898 A CN109593898 A CN 109593898A
- Authority
- CN
- China
- Prior art keywords
- collagen
- biomass
- preparation
- retanning agent
- response type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The present invention relates to leather science fields, specially a kind of preparation method based on biomass-based response type amphoteric retanning agent, it is characterized in that using discarded collagen as raw material, collagen hydrolysate is prepared by industrial complex enzyme, then catalysis oxidation is carried out to tannin extract using biological enzyme, Hydrolyzed Collagen is carried out with catalysis oxidation tannin extract again cross-linking modified, prepare a kind of organic retanning agent of environmentally friendly collagen type of amphoteric reaction type, the retanning agent is full biomass component, it is biodegradable, retanning for leather, the pI of organic tanning agent tanning can be improved, retanning procedures suitable for all leather processing procedures.
Description
Technical field
The present invention relates to leather science fields, and in particular to it is a kind of based on biomass-based response type amphoteric retanning agent and
Preparation method.
Background technique
China is process hides big country, and chrome leather waste estimates that, every year at 300,000 tons or more, what factory used at present banks up method
Or incineration method can all cause environment seriously to pollute.Contain a large amount of collagen in chrome shavinge waste material, if discarded chrome leather
It considers the collagen in waste material to be worth doing, a kind of collagen retanning agent is prepared by modified further processing, this not only gives up chrome leather
Bits are turned waste into wealth, and the requirement of Green Chemistry and sustainable development is met, and are also added to the exploitation of environment-friendly type retanning agent and application, cleaning
The optimization of work technology has certain directive significance.
Currently, the preparation of collagen class retanning agent is modified collagen frequently with glutaraldehyde, resin etc..Glutaraldehyde changes
Property organic retanning agent excessively crosslinking is easily generated with collagen in pelts tanning process, cause grain excessively consolidation, and glutaraldehyde is toxic,
The modified organic retanning agent of glutaraldehyde is only used for the retanning of dark leather, limits its application.And the modified retanning agent tanning of resinae
Since moisture can be absorbed in resin itself, water suction is fast, water absorption is big, and absorbing the water overwhelming majority is in conjunction with water, and drying in short-term is not
It easily removes, during leather is displayed, it is also possible to generate formaldehyde, keep hide fiber withered and embrittlement, therefore dosage is less.
To sum up, above-mentioned collagen class retanning agent there are aiming at the problem that, the present invention relates to a kind of by Hydrolyzed Collagen
The biomass-based retanning agent prepared with catalysis oxidation tannin extract by cross-linking reaction.Tannin extract is the plant extracts containing tannin, mainly
Purposes is tan leather, and tannin extract has many advantages, such as that nontoxic, pollution is small, biodegradable, is free of heavy metal ion, is free of formaldehyde,
Meet the environmental requirement and green, the production theory of safety product of clean manufacturing.
Summary of the invention
The present invention relates to a kind of preparation methods based on biomass-based response type amphoteric retanning agent, it is intended to a kind of green in providing
Color, low cost based on the biomass-based preparation method for preparing collagen retanning agent, this method is with discarded collagen
Raw material prepares collagen hydrolysate by industrial complex enzyme, then carries out catalysis oxidation to tannin extract with biological enzyme again, then with catalysis oxygen
Change tannin extract and Hydrolyzed Collagen is carried out cross-linking modified, it is organic multiple to prepare a kind of both sexes, the environmentally friendly collagen type of response type
Tanning agent.
To achieve the goals above, the technical solution adopted by the present invention is that:
It is a kind of based on biomass-based response type amphoteric retanning agent, obtained by method comprising the following steps:
(1) preparation of collagen hydrolysate: the collagen of 10 ~ 20 g is accurately weighed in the three-necked flask of 150 ~ 500 mL, so
The water of 50 ~ 250 mL is added afterwards, three-necked flask is put into thermostat water bath, adjusting temperature is 37 DEG C；Accurately weigh collagen
Albumen weighs 5% ~ 15% industrial complex enzyme, is added in three-necked flask, and agitator speed is set as 10 ~ 30 r/min or so,
React 2 ~ 6 h；After the reaction was completed, three-necked flask is placed on heating on electrothermal furnace to boil, and cooled down at once, is finally freeze-dried
It is spare；
(2) preparation of biological enzyme oxygenated vegetable tannin extract: the tannin extract for weighing 3 ~ 6 g in a kettle, adds 0.09 ~ 0.18
The biological enzyme of g stirring and dissolving in a kettle, and being sufficiently mixed, reaction bath temperature is 30 ~ 50 DEG C, adjust pH be 5.0 ~
6.0, react 20 ~ 30 h；
(3) preparation based on biomass-based response type amphoteric retanning agent: 7.5 ~ 15g collagen prepared by step (1)
Hydrolysate pours into reaction kettle, then the catalysis oxidation tannin extract of 3 ~ 6 g of step (2) preparation is poured into reaction kettle, reaction water
Bath temperature is 30 ~ 50 DEG C, and adjusting pH is 5.0 ~ 6.0, reacts 20 ~ 30 h, to which after the reaction was completed, freeze-drying is stand-by.
A further improvement of the present invention is that collagen hydrolysate described in step (1) is the glue extracted from scrap leather
Former albumen is hydrolyzed with industrial complex enzyme, and counting equal relative molecular mass Mn is 1000 ~ 3000Da.
A further improvement of the present invention is that reaction temperature described in step (1) is 30 ~ 50 DEG C, it is stirred to react the time
For 2 ~ 6 h.
A further improvement of the present invention is that crosslinking agent described in step (2) is the tannin extract aoxidized through biological enzyme.
A further improvement of the present invention is that the dosage of biological enzyme described in step (2) is the 2% ~ 5% of tannin extract dosage.
A further improvement of the present invention is that oxygenated vegetable tannin extract dosage described in step (3) is collagen hydrolysate weight
10% ~ 50%, reaction bath temperature be 30 ~ 50 DEG C, adjust pH be 5.0 ~ 6.0, the reaction time be 24 h.
The present invention aoxidizes tannin extract by biological enzyme, its part of hydroxyl is made to be changed into quinoid structure, can be with collagen
Protein side chains amino forms covalent cross-linking, and simultaneous oxidation process will also result in tannin extract molecular degradation, enhance it to intradermal penetration
Ability.Tannin extract introduces active group after catalytic oxidation treatment, makes it have highly reactive property, and flexibility significantly increases,
Again with prepare that collagen hydrolysate is cross-linking modified by industrial complex enzyme, the response type both sexes for preparing a kind of full biomass component are multiple
The pI of organic tanning agent tanning can be improved for the retanning of leather in tanning agent, fundamentally improves organic tanning agent tanning to conventional wet
The absorption binding ability of finishing material keeps resultant leather quality and chrome leather close, is suitable for all leather products.
This technology compared with prior art, has the advantages that
(1) for the present invention using scrap leather collagen as raw material, abundance is cheap, and the retanning agent of preparation is scrap leather collagen egg
White recycling recycling provides an approach；
(2) collagen hydrolysate is the smaller collagen of molecular weight or collagen polypeptide, glue by industrial complex enzyme by the present invention
The structure of former polypeptide and leather collagen side-chain structure are very much like, can be fused to well in materials with hide glue fibril system, tool
There is good filling capacity；
(3) present invention prepares retanning agent by raw material of Hydrolyzed Collagen, and Hydrolyzed Collagen sufficiently exposes the ammonia of its side chain
Base and carboxyl make it have both sexes feature, and significantly improve its penetrating power in crust leather；
(4) for the present invention with the tannin extract modified collagen albumen of catalysis oxidation, the tannin extract after biological enzyme aoxidizes has height
Reactivity, flexibility significantly increases, and can promote the mechanical performance and chemical stability of finished leather, the collagen of preparation well
Retanning agent is full biomass component, fully biodegradable.
Specific embodiment
The present invention is specifically described below with reference to embodiment, it is necessary to which indicated herein is that the present embodiment is only used
In invention is further explained, and it should not be understood as limiting the scope of the invention, which is skilled in technique
Personnel can make nonessential modifications and adaptations according to the content of foregoing invention.
Embodiment 1
Then plus 50 (1) preparation of collagen hydrolysate: accurately weighing the collagen of 10 g in the three-necked flask of 150 mL,
The water of mL, three-necked flask is put into thermostat water bath, and adjusting temperature is 37 DEG C；Accurately weigh the industry that collagen weighs 5%
Complex enzyme is added in three-necked flask, and agitator speed is set as 10 r/min or so, reacts 2 h；After the reaction was completed, Jiang Sankou
Flask is placed on heating on electrothermal furnace and boils, and cools down at once, is finally freeze-dried spare；
(2) preparation of biological enzyme oxygenated vegetable tannin extract: the tannin extract for weighing 3 g in a kettle, adds the biological enzyme of 0.09 g
Stirring and dissolving in a kettle, and be sufficiently mixed, reaction bath temperature is 30 DEG C, and adjusting pH is 5.0, reacts 20 h；
(3) preparation based on biomass-based response type amphoteric retanning agent: 7.5g collagen hydrolysate prepared by step (1)
It pours into reaction kettle, then the catalysis oxidation tannin extract of 3 g of step (2) preparation is poured into reaction kettle, reaction bath temperature is 30
DEG C, adjusting pH is 5.0,20 h is reacted, to which after the reaction was completed, freeze-drying is stand-by.
Embodiment 2
(1) preparation of collagen hydrolysate: the collagen of 15 g is accurately weighed in the three-necked flask of 250 mL, is then added
The water of 100 mL, three-necked flask is put into thermostat water bath, and adjusting temperature is 37 DEG C；It accurately weighs collagen and weighs 10%
Industrial complex enzyme is added in three-necked flask, and agitator speed is set as 20 r/min or so, reacts 4 h；After the reaction was completed, will
Three-necked flask is placed on heating on electrothermal furnace and boils, and cools down at once, is finally freeze-dried spare；
(2) preparation of biological enzyme oxygenated vegetable tannin extract: the tannin extract for weighing 4.5 g in a kettle, adds the biology of 0.135 g
Enzyme stirring and dissolving in a kettle, and be sufficiently mixed, reaction bath temperature is 37 DEG C, and adjusting pH is 5.5, reacts 24 h；
(3) preparation based on biomass-based response type amphoteric retanning agent: 10g collagen hydrolysate prepared by step (1)
It pours into reaction kettle, then the catalysis oxidation tannin extract that step (2) prepare 4.5 g is poured into reaction kettle, reaction bath temperature is 40
DEG C, adjusting pH is 5.5,24 h is reacted, to which after the reaction was completed, freeze-drying is stand-by.
Embodiment 3
(1) preparation of collagen hydrolysate: the collagen of 20 g is accurately weighed in the three-necked flask of 500 mL, is then added
The water of 250 mL, three-necked flask is put into thermostat water bath, and adjusting temperature is 37 DEG C；It accurately weighs collagen and weighs 15%
Industrial complex enzyme is added in three-necked flask, and agitator speed is set as 30 r/min or so, reacts 6 h；After the reaction was completed, will
Three-necked flask is placed on heating on electrothermal furnace and boils, and cools down at once, is finally freeze-dried spare；
(2) preparation of biological enzyme oxygenated vegetable tannin extract: the tannin extract for weighing 6 g in a kettle, adds the biological enzyme of 0.18 g
Stirring and dissolving in a kettle, and be sufficiently mixed, reaction bath temperature is 50 DEG C, and adjusting pH is 6.0, reacts 30 h；
(3) preparation based on biomass-based response type amphoteric retanning agent: 15g collagen hydrolysate prepared by step (1)
It pours into reaction kettle, then the catalysis oxidation tannin extract of 6 g of step (2) preparation is poured into reaction kettle, reaction bath temperature is 50
DEG C, adjusting pH is 6.0,30 h is reacted, to which after the reaction was completed, freeze-drying is stand-by.
Embodiment 4
The collagen retanning filler of synthesis is applied in sheepskin tanning experiment, and optimizes oxygenated vegetable tannin extract and water
Dosage when collagen cross-linking is solved, the dosage of oxygenated vegetable tannin extract is set as to 10 %, 20 %, 30 of Hydrolyzed Collagen matter weight respectively
%, 40 %, 50% apply the retanning filler of synthesis in identical process for tanning, carry out to the finished leather performance of tan leather
Analysis.
The shrinkage temperature of tan leather is detected, the results are shown in Table 1.Different amounts oxygenated vegetable tannin extract modified collagen egg
White retanning agent has shrinkage temperature to be promoted to some extent, and wherein oxygenated vegetable tannin extract dosage is the 30% lower retanning filling synthesized
The shrinkage temperature of agent promotes the most obvious, about 6 DEG C of increase, 6.3 promoted with the retanning agent of glutaraldehyde modified collagen albumen preparation
DEG C gap is little.This illustrates retanning filler prepared by this patent, can improve the shrinkage temperature of leather, has certain tan
Property.
The physical mechanical property such as tensile strength, elongation at break etc. of finished leather is tested and analyzed, as a result such as following table institute
Show.
By table 2 it can be found that the anti-tensile of leather is strong after the retanning filler that oxygenated vegetable tannin extract modified collagen albumen is added
Degree has all obtained improving to a certain extent, and tannin extract modification is strong with the leather anti-tensile of the modified collagen retanning agent of glutaraldehyde
Spend close, this illustrates that the retanning filler of this patent preparation can make the closer of fibrage, and it is certain that leather can be improved
Mechanical performance.
By table 3 it can be found that the elongation at break of leather has promotion after retanning is filled, illustrate that filler makes
Leather fiber is closer, and the elongation at break of oxygenated vegetable tannin extract modified collagen albumen is close, and glutaraldehyde modified collagen albumen is disconnected
It is slightly lower to split elongation.
Claims (10)
1. one kind be based on biomass-based response type amphoteric retanning agent, which is characterized in that by catalysis oxidation tannin extract quinoid structure with
The amino of collagen hydrolysate is cross-linking modified to be obtained.
2. according to claim 1 a kind of based on biomass-based response type amphoteric retanning agent, which is characterized in that the catalysis
Oxygenated vegetable tannin extract is aoxidized to obtain by tannin extract through biological enzyme.
3. according to claim 1 a kind of based on biomass-based response type amphoteric retanning agent, which is characterized in that the collagen
Protolysate is one of the collagen of the equal relative molecular mass Mn=1000 ~ 3000Da of number, collagen polypeptide or more
Kind.
4. according to claim 1 a kind of based on biomass-based response type amphoteric retanning agent, which is characterized in that the collagen
Protolysate is obtained by collagen through the compound enzymatic hydrolysis of industry.
5. a kind of preparation method based on biomass-based response type amphoteric retanning agent, which comprises the following steps:
By collagen hydrolysate, the reaction soluble in water of catalysis oxidation tannin extract, 30 ~ 50 DEG C of reaction temperature, reaction pH=5.0 ~
6.0, it sufficiently reacts, obtains a kind of based on biomass-based response type amphoteric retanning agent.
6. a kind of preparation method based on biomass-based response type amphoteric retanning agent according to claim 5, feature exist
In collagen hydrolysate and catalysis oxidation tannin extract after the reaction was completed, reaction solution are freeze-dried, separating-purifying.
7. a kind of preparation method based on biomass-based response type amphoteric retanning agent according to claim 5, feature exist
In the mass ratio of collagen hydrolysate and catalysis oxidation tannin extract is (6 ~ 15): (3 ~ 6).
8. a kind of preparation method based on biomass-based response type amphoteric retanning agent according to claim 5, feature exist
In specific steps include:
1) preparation of collagen hydrolysate: accurately weighing the collagen of 10 ~ 20 g, and the water of 50 ~ 250 mL is added, and water-bath adds
Heat, adjusting temperature is 37 DEG C；Be subsequently added into the industrial complex enzyme of the 5% ~ 15% of collagen weight, revolving speed be 10 ~
2 ~ 6 h are reacted under 30 r/min, are cooled down to after the reaction was completed, boil reaction solution, and at once, are freeze-dried spare；
2) preparation of biological enzyme oxygenated vegetable tannin extract: the tannin extract dissolution of 3 ~ 6 g is weighed, the life of 0.09 ~ 0.18 g is added
Object enzyme stirring and dissolving, reaction bath temperature are 30 ~ 50 DEG C, and adjusting pH is 5.0 ~ 6.0, react 20 ~ 30 h；
3) preparation based on biomass-based response type amphoteric retanning agent: the collagen hydrolysate for taking 6 ~ 15g step 1) to prepare
Be dissolved in suitable water, and be added 3 ~ 6 g step 2 preparation catalysis oxidation tannin extract, heating water bath, reaction temperature be 30 ~
50 DEG C, adjusting pH is 5.0 ~ 6.0, reacts 20 ~ 30 h, to which after the reaction was completed, freeze-drying obtains powdery and is based on biomass
The response type amphoteric retanning agent of base.
9. a kind of preparation method based on biomass-based response type amphoteric retanning agent according to claim 8, feature exist
In the active constituent of industrial complex enzyme described in step 1) includes industrial pancreatin, papain and 172 neutral enzymatics, industrial pancreas
The mass ratio of enzyme, papain and 172 neutral enzymatics is (1 ~ 5): (0.5 ~ 2): (1 ~ 3).
10. a kind of preparation method based on biomass-based response type amphoteric retanning agent according to claim 8, feature exist
In the biological enzyme of catalysis oxidation tannin extract described in step 2 is one of tyrosinase, laccase, catechol-oxydase or more
Kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910048456.8A CN109593898B (en) | 2019-01-18 | 2019-01-18 | Biomass-based reactive amphoteric retanning agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910048456.8A CN109593898B (en) | 2019-01-18 | 2019-01-18 | Biomass-based reactive amphoteric retanning agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109593898A true CN109593898A (en) | 2019-04-09 |
| CN109593898B CN109593898B (en) | 2021-07-16 |
Family
ID=65966227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910048456.8A Active CN109593898B (en) | 2019-01-18 | 2019-01-18 | Biomass-based reactive amphoteric retanning agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109593898B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774594A (en) * | 2022-05-05 | 2022-07-22 | 陕西科技大学 | Collagen-hyperbranched amphoteric polymer retanning agent and preparation method thereof |
| CN115011742A (en) * | 2022-06-29 | 2022-09-06 | 陕西科技大学 | Epoxy modified collagen polypeptide-based organic chromium-free tanning agent, preparation method and application |
| CN117418047A (en) * | 2023-10-19 | 2024-01-19 | 齐鲁工业大学(山东省科学院) | High-absorption chrome tanning auxiliary agent containing dithiocarbamate structure, and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960428A (en) * | 1988-01-29 | 1990-10-02 | Rohm Gmbh | Method for liming skins and hides |
| CN1450175A (en) * | 2003-05-06 | 2003-10-22 | 四川大学 | Plant polyphenol-protein composite leather filler and preparation process thereof |
| CN105838829A (en) * | 2016-05-03 | 2016-08-10 | 安徽银河皮革有限公司 | Environment-friendly leather retanning agent based on protein hydrolysate |
| CN108285937A (en) * | 2018-04-16 | 2018-07-17 | 陕西科技大学 | A method of based on biological enzyme oxidation vegetable extract and its for leather tanning |
-
2019
- 2019-01-18 CN CN201910048456.8A patent/CN109593898B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960428A (en) * | 1988-01-29 | 1990-10-02 | Rohm Gmbh | Method for liming skins and hides |
| CN1450175A (en) * | 2003-05-06 | 2003-10-22 | 四川大学 | Plant polyphenol-protein composite leather filler and preparation process thereof |
| CN105838829A (en) * | 2016-05-03 | 2016-08-10 | 安徽银河皮革有限公司 | Environment-friendly leather retanning agent based on protein hydrolysate |
| CN108285937A (en) * | 2018-04-16 | 2018-07-17 | 陕西科技大学 | A method of based on biological enzyme oxidation vegetable extract and its for leather tanning |
Non-Patent Citations (4)
| Title |
|---|
| J. HERBERT WAITE: "THE PHYLOGENY AND CHEMICAL DIVERSITY OF", 《COMP.BIOCHEM.PHYSIOL.》 * |
| 戴丹琴等: "复合酶制备牛皮胶原多肽", 《精细化工》 * |
| 洪孝庄: "《蛋白质连接技术》", 30 June 1993, 中国医药科技出版社 * |
| 马爱霞: "《药品GMP车间实训教程下》", 31 August 2016, 中国医药科技出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774594A (en) * | 2022-05-05 | 2022-07-22 | 陕西科技大学 | Collagen-hyperbranched amphoteric polymer retanning agent and preparation method thereof |
| CN115011742A (en) * | 2022-06-29 | 2022-09-06 | 陕西科技大学 | Epoxy modified collagen polypeptide-based organic chromium-free tanning agent, preparation method and application |
| CN117418047A (en) * | 2023-10-19 | 2024-01-19 | 齐鲁工业大学(山东省科学院) | High-absorption chrome tanning auxiliary agent containing dithiocarbamate structure, and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109593898B (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109593898A (en) | It is a kind of based on the biomass-based amphoteric retanning agent and preparation method thereof with reactivity | |
| Beghetto et al. | Sustainable use of 4-(4, 6-dimethoxy-1, 3, 5-triazin-2-yl)-4-methylmorpholinium chloride as metal free tanning agent | |
| EP2607500A1 (en) | Leather manufacturing process using a soluble oxidized starch-derived polysaccharide and compositions containing it | |
| TW201311746A (en) | Polysaccharide and/or polypeptide based graft polymers as synthetic tannins | |
| CN1908293A (en) | Leather-making used dyeing filler and preparation thereof | |
| Scopel et al. | Collagen hydrolysate extraction from chromed leather waste for polymeric film production | |
| CN111051375A (en) | Method for preparing lignin-modified polyphenol products and use thereof for treating leather and hides | |
| Ramya et al. | Effective utilization of tannery hair waste to develop a high-performing re-tanning agent for cleaner leather manufacturing | |
| Pradeep et al. | Melamine-based polymeric crosslinker for cleaner leather production | |
| Ding et al. | A novel synergistic covalence and complexation bridging strategy based on multi-functional biomass-derived aldehydes and Al (III) for engineering high-quality eco-leather | |
| Lu et al. | The reaction of vegetable tannin-aldehyde-collagen: A further understanding of vegetable tannin-aldehyde combination tannage | |
| Mengistu et al. | Optimization of keratin hydrolysate extraction from tannery sheep hair waste | |
| Rigueto et al. | Steam explosion pretreatment for bovine limed hide waste gelatin extraction | |
| Ding et al. | Conversion of waste non-chrome metal complex tanned leather shavings to dual-functional bio-additive for the high-performance biomass-derived aldehyde tanned leather processing | |
| CN102002540B (en) | Preparation method of modified Chinese gall tanning extract environmentally-friendly leather tanning agent | |
| Ding et al. | Providing Natural Organic Pigments with Excellent Tanning Capabilities: A Novel “One-Pot” Tanning–Dyeing Integration Strategy for Sustainable Leather Manufacturing | |
| Ding et al. | Dialdehyde sodium alginate bonded dicyandiamide for formaldehyde-free leather production with enhanced properties | |
| Xiao et al. | Modular design of vegetable polyphenols enables covalent bonding with collagen for eco-leather | |
| CN109628666A (en) | Leather retanning agent and its preparation method and application | |
| CN111961173A (en) | Preparation method of amino resin retanning agent, retanning agent and application of retanning agent | |
| CN108285937A (en) | A method of based on biological enzyme oxidation vegetable extract and its for leather tanning | |
| CN107904335B (en) | Leather wet finishing process for improving poor leather position problem | |
| CN108517381B (en) | Method for tanning leather by using carbodiimide-catalyzed amino-terminated hyperbranched polymer | |
| CN107201413B (en) | chrome-free tanning agent and preparation method thereof | |
| Nur-E-Alam et al. | Acid hydrolysis of untanned proteinous wastes from tannery industry in Bangladesh |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |