CN104745735B - A kind of preparation method of white wet leather - Google Patents
A kind of preparation method of white wet leather Download PDFInfo
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- CN104745735B CN104745735B CN201510134110.1A CN201510134110A CN104745735B CN 104745735 B CN104745735 B CN 104745735B CN 201510134110 A CN201510134110 A CN 201510134110A CN 104745735 B CN104745735 B CN 104745735B
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- liming
- tanning
- tanning agent
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- 239000010985 leather Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 63
- 238000005554 pickling Methods 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical group [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 20
- 238000010790 dilution Methods 0.000 claims description 20
- 239000012895 dilution Substances 0.000 claims description 20
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 230000002378 acidificating effect Effects 0.000 claims description 12
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 235000019253 formic acid Nutrition 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000006210 lotion Substances 0.000 claims description 10
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 10
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 10
- 235000011149 sulphuric acid Nutrition 0.000 claims description 10
- 239000001117 sulphuric acid Substances 0.000 claims description 10
- 241000283898 Ovis Species 0.000 claims description 6
- 241000282894 Sus scrofa domesticus Species 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 abstract description 4
- 229910017053 inorganic salt Inorganic materials 0.000 abstract description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 poly-carbamyl Sulfonates Chemical class 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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
-
- 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
- C14C3/28—Multi-step processes
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)
Abstract
The preparation method of a kind of white wet leather, first carries out deashing and softening, softening washing, then carries out liming skinThe tanning of tanning agent, then carry out salt-free pickling, finally carry out TANFORTMThe tanning of T series tanning agent, the present invention willAnd TANFORTMT series tanning agent combines, and not only can obtain the wet-white leather that shrinkage temperature is higher, it is achieved chrome-free tanning, reduces the use of inorganic salt and the content in waste water thereof.
Description
Technical field
The present invention relates to ecological tanning technology field, the preparation method being specifically related to a kind of white wet leather.
Background technology
In tanning production, chrome tanning agent be currently used the most extensively, the maximum tanning agent material of consumption, the chrome leather of tanning has its advantage that cannot replace. But, the waste water containing chromium, mud and the leather leftover produced in tannery, ecological environment, domestic animal are caused high risks (Ma Jianzhong. leather chemicals [M] .2004, Chemical Industry Press, 110), the survival and development of mankind itself are constituted great threat, and chrome leather color and luster is deeper, it is impossible to well meet people's hobby to beautiful color. Therefore, develop the wet-white leather tannery of Chrome-free will have good development prospect (Shi Yonglu, Wang Wenqi, Zhao Hui. simple and easy aluming yellow cow sofa leather technique [J]. leather and chemical industry, 2014, (31): 22-25).
Being a kind of poly-carbamyl Sulfonates mixture with good flexibility, soluble in water, storage stability is good, and it is without metal, phenol and aldehyde material, and environment is safe from harm; TANFORTMThe mankind and environment, owing to being raw material based on the natural minerals of aluminum and silicon, are perfectly safe harmless by the tanning material that T series tanning agent is is active component with silicoaluminate.
TANFORTMT series tanning agent is applicable to the acid tanning system that pH is 2.8-3.0, similar to the tanning principle of chrome tanning agent, be mainly combined with carboxyl (Qiang Xihuai, Chen Miaomiao, etc. environment-friendly and high-performance KEMIRATANFORTMThe performance of T series tanning agent and application [J]. Chinese leather, 2013, (42): 19-22);Tanning agent is applicable to carry out tanning effect under weakly alkaline condition, and the main amino with collagen reacts. The production of white wet leather be can each realize at both materials under independent tanning system, but certain defect or drawback there is also, for instance: its tanned white wet leather shrinkage temperature is not high, TANFORTMRoutine is needed to have salt pickling etc. during T series tanning agent tanning.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the preparation method that it is an object of the invention to provide a kind of white wet leather, willAnd TANFORTMT series tanning agent combines, and not only can obtain the wet-white leather that shrinkage temperature is higher, it is achieved chrome-free tanning, reduces the use of inorganic salt and the content in waste water thereof.
For reaching above-mentioned purpose, the present invention is achieved through the following technical solutions:
The preparation method of a kind of white wet leather, comprises the following steps:
1) liming skin is carried out deashing and softening, softening washing;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 2-5%Tanning agent, rotates 2h-4h by 20 DEG C-25 DEG C;Use the alkaline matter after 10 times of water dilutions, by pH regulator to 8.5-9.0 in 2h, be rotated further 1h-2h;
3) salt-free pickling: in step 2) owse in gradation add the acidic materials after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is at 2.5-3.0, is rotated further 1h-2h at 20 DEG C-25 DEG C;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 3-5%, 20 DEG C-25 DEG C, rotate 2h-3h; It is subsequently adding the T-B tanning agent of liming tare weight amount 2-4%, rotates 2h-4h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1h-2h, looking into pH is 4.0-4.4, stops drum overnight, goes out drum after rotating 30min next day.
Described liming skin is Corii Caprae seu Ovis, Corii Bovis seu Bubali or Corii Sus domestica.
Described alkaline matter is sodium bicarbonate or soda.
Described acidic materials are formic acid or sulphuric acid.
Present invention have the advantage that
1, white by the leather dermatotome of this method tanning, dyeability is splendid.
2, the shortcoming that when this two classes tanning agent is used alone, shrinkage temperature is relatively low is overcome.
3, avoid the use of sodium chloride when pickling, it is achieved that salt-free pickling, alleviate the chloride ion pollution to environment in leather-making waste water.
Detailed description of the invention
By the examples below the present invention is specifically described, is served only for the present invention is further described, it is impossible to be interpreted as limiting the scope of the invention.
Embodiment one
The preparation method of a kind of white wet leather, comprises the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Bovis seu Bubali;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 5%Tanning agent, rotates 4h by 20 DEG C; Using the sodium bicarbonate after 10 times of water dilutions by pH regulator to 9.0 in 2h, be rotated further by 2h, described alkaline matter is soda;
3) salt-free pickling: in step 2) owse in gradation add the formic acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.8, is rotated further 2h at 20 DEG C, and described acidic materials are sulphuric acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 3%, 20 DEG C, rotate 2h; It is subsequently adding the T-B tanning agent of liming tare weight amount 4%, rotates 4h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1h, look into pH and 4.4 stop drum overnight, after rotating 30min next day, go out drum.
The tanning shrinkage temperature of the present embodiment is 90 DEG C.
Embodiment two
The preparation method of a kind of white wet leather, comprises the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Caprae seu Ovis;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 4%Tanning agent, rotates 3h by 25 DEG C; Using the soda after 10 times of water dilutions by pH regulator to 8.8 in 2h, be rotated further by 1.5h, described alkaline matter is sodium bicarbonate;
3) salt-free pickling: in step 2) owse in gradation add the formic acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.9, is rotated further 2h at 25 DEG C, and described acidic materials are formic acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 3%, 25 DEG C, rotate 2h; It is subsequently adding the T-B tanning agent of liming tare weight amount 3%, rotates 3h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1.5h, looking into pH is 4.2, stops drum overnight, goes out drum after rotating 30min next day.
The tanning shrinkage temperature of the present embodiment is 88 DEG C.
Embodiment three
The preparation method of a kind of white wet leather, comprises the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Caprae seu Ovis;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 3%Tanning agent, rotates 2.5h by 25 DEG C; Using the soda after 10 times of water dilutions by pH regulator to 8.5 in 2h, be rotated further by 1.5h, described alkaline matter is sodium bicarbonate;
3) salt-free pickling: in step 2) owse in gradation add the sulphuric acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.6, is rotated further 1.5h at 25 DEG C, and described acidic materials are formic acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 4%, 25 DEG C, rotate 2.5h; It is subsequently adding the T-B tanning agent of liming tare weight amount 2.5%, rotates 2h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1.5h, looking into pH is 4.1, stops drum overnight, goes out drum after rotating 30min next day.
The tanning shrinkage temperature of the present embodiment is 89 DEG C.
Embodiment four
The preparation method of a kind of white wet leather, comprises the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Sus domestica;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 2%Tanning agent, rotates 2h by 22 DEG C; Using the sodium bicarbonate after 10 times of water dilutions by pH regulator to 9.0 in 2h, be rotated further by 1h, described alkaline matter is soda;
3) salt-free pickling: in step 2) owse in gradation add the sulphuric acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.5, is rotated further 1h at 22 DEG C, and described acidic materials are sulphuric acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 5%, 22 DEG C, rotate 3h; It is subsequently adding the T-B tanning agent of liming tare weight amount 2%, rotates 2h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 2h, looking into pH is 4.0, stops drum overnight, goes out drum after rotating 30min next day.
The tanning shrinkage temperature of the present embodiment is 88 DEG C.
Claims (8)
1. the preparation method of the leather that wets in vain, it is characterised in that comprise the following steps:
1) liming skin is carried out deashing and softening, softening washing;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 2-5%Tanning agent, rotates 2h-4h by 20 DEG C-25 DEG C; Use the alkaline matter after 10 times of water dilutions, by pH regulator to 8.5-9.0 in 2h, be rotated further by 1h-2h;
3) salt-free pickling: in step 2) owse in gradation add the acidic materials after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is at 2.5-3.0, is rotated further 1h-2h at 20 DEG C-25 DEG C;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 3-5%, 20 DEG C-25 DEG C, rotate 2h-3h; It is subsequently adding the T-B tanning agent of liming tare weight amount 2-4%, rotates 2h-4h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1h-2h, looking into pH is 4.0-4.4, stops drum overnight, goes out drum after rotating 30min next day.
2. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that: described liming skin is Corii Caprae seu Ovis, Corii Bovis seu Bubali or Corii Sus domestica.
3. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that: described alkaline matter is sodium bicarbonate or soda.
4. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that: described acidic materials are formic acid or sulphuric acid.
5. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that comprise the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Bovis seu Bubali;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 5%Tanning agent, rotates 4h by 20 DEG C; Using the sodium bicarbonate after 10 times of water dilutions by pH regulator to 9.0 in 2h, be rotated further by 2h, described alkaline matter is soda;
3) salt-free pickling: in step 2) owse in gradation add the formic acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.8, is rotated further 2h at 20 DEG C, and described acidic materials are sulphuric acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 3%, 20 DEG C, rotate 2h; It is subsequently adding the T-B tanning agent of liming tare weight amount 4%, rotates 4h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1h, look into pH and 4.4 stop drum overnight, after rotating 30min next day, go out drum.
6. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that comprise the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Caprae seu Ovis;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 4%Tanning agent, rotates 3h by 25 DEG C; Using the soda after 10 times of water dilutions by pH regulator to 8.8 in 2h, be rotated further by 1.5h, described alkaline matter is sodium bicarbonate;
3) salt-free pickling: in step 2) owse in gradation add the formic acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.9, is rotated further 2h at 25 DEG C, and described acidic materials are formic acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 3%, 25 DEG C, rotate 2h; It is subsequently adding the T-B tanning agent of liming tare weight amount 3%, rotates 3h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1.5h, looking into pH is 4.2, stops drum overnight, goes out drum after rotating 30min next day.
7. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that comprise the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Caprae seu Ovis;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 3%Tanning agent, rotates 2.5h by 25 DEG C; Using the soda after 10 times of water dilutions by pH regulator to 8.5 in 2h, be rotated further by 1.5h, described alkaline matter is sodium bicarbonate;
3) salt-free pickling: in step 2) owse in gradation add the sulphuric acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.6, is rotated further 1.5h at 25 DEG C, and described acidic materials are formic acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 4%, 25 DEG C, rotate 2.5h; It is subsequently adding the T-B tanning agent of liming tare weight amount 2.5%, rotates 2h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 1.5h, looking into pH is 4.1, stops drum overnight, goes out drum after rotating 30min next day.
8. the preparation method of a kind of white wet leather according to claim 1, it is characterised in that comprise the following steps:
1) liming skin is carried out deashing and softening, softening washing, described liming skin is Corii Sus domestica;
2)The tanning of tanning agent: the liming skin after washing is put into rotary drum, adds the water of liming tare weight amount 100% and 2%Tanning agent, rotates 2h by 22 DEG C;Using the sodium bicarbonate after 10 times of water dilutions by pH regulator to 9.0 in 2h, be rotated further by 1h, described alkaline matter is soda;
3) salt-free pickling: in step 2) owse in gradation add the sulphuric acid after with the dilution of 10 times of water, in 1h, adjustment body lotion pH is 2.5, is rotated further 1h at 22 DEG C, and described acidic materials are sulphuric acid;
4)TANFORTMThe tanning of T series tanning agent: in step 3) pickling liquid adds the T-A tanning agent of liming tare weight amount 5%, 22 DEG C, rotate 3h; It is subsequently adding the T-B tanning agent of liming tare weight amount 2%, rotates 2h; Add the water of liming tare weight amount 150%, 40 DEG C, then turn 2h, looking into pH is 4.0, stops drum overnight, goes out drum after rotating 30min next day.
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| CN201510134110.1A CN104745735B (en) | 2015-03-25 | 2015-03-25 | A kind of preparation method of white wet leather |
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| CN105238888A (en) * | 2015-10-27 | 2016-01-13 | 兴业皮革科技股份有限公司 | Production technology for preparing wet white leather on basis of Zr-Al-Ti complex |
| CN109234476B (en) * | 2018-11-26 | 2021-08-06 | 四川大学 | Preparation method of chrome-free tanned leather with hydrophobic high-dispersion leather fiber structure |
| CN109234477B (en) * | 2018-11-26 | 2021-06-29 | 四川大学 | Preparation method of chromium-free leather |
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| CN103834751A (en) * | 2012-11-21 | 2014-06-04 | 中牛集团有限公司 | Non-chrome tanned wet-white leather making technology |
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