CN104726622B - Salt-free pickling two-step chrome tanning process - Google Patents
Salt-free pickling two-step chrome tanning process Download PDFInfo
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- CN104726622B CN104726622B CN201510134190.0A CN201510134190A CN104726622B CN 104726622 B CN104726622 B CN 104726622B CN 201510134190 A CN201510134190 A CN 201510134190A CN 104726622 B CN104726622 B CN 104726622B
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- 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
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- 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
- C14C3/04—Mineral tanning
- C14C3/06—Mineral tanning using chromium compounds
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- 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 invention provides a salt-free pickling two-step chrome tanning process. The process comprises the following steps: firstly pre-tanning softened leather by using an SF-1 tanning agent; and performing salt-free pickling and conventional chrome tanning. According to the process flow, usage of edible salt is completely avoided, the prepared wet-blue leather has pure color, fine grain side and soft leather body, usage of neutral salt is avoided in pickling, and thus the content of neutral salt in tanning waste water is greatly reduced.
Description
Technical field
The present invention relates to cleaning ecological tanning technology field and in particular to a kind of salt-free pickling two step chrome tanning process.
Background technology
Pickling is very crucial operation before conventional chrome tanning, and it is fine that good pickling can make chrome tanning agent successfully penetrate into collagen
Between Wiki matter.8% about neutral salt need to be added during pickling come the swelling to suppress collagen in acid medium, thus produce
The leather-making waste water of high concentration saliferous be a serious environmental problem, for reaching the sustainable development purpose of leather industry, system
Cleaning of leather is also imperative, and salt-free pickling is a wherein important link.
In recent years, for domestic research, Feng's white silk is enjoyed and being waited using organic sulfonic acid compound, EDETATE SODIUM, organic acid
A kind of new salt-free auxiliary pickling agent of class compound synthesis, can obtain the careful indigo plant of good hand feeling, grain using this auxiliary agent
Wet leather (Feng's white silk is enjoyed, white clear spring. a kind of new salt-free pickling leather additive [P]. Shandong：CN102242228A,2011-11-
16.)；Using naphthalene, phenol, urea etc., polycondensation obtains auxiliary pickling agent at different conditions, using this auxiliary agent for list will China of Sichuan University etc.
The absorptivity of chromium can be improved, remove from neutral salt use (Dan Zhihua, Wang Qunzhi. the research [J] of salt-free pickling and auxiliary agent. in
State's leather, 1998,27 (10):5-7).The exploitation of new auxiliary pickling agent is to realize no (lacking) salt to provide approach effectively, but
Have the shortcomings that certain, the use of auxiliary pickling agent may introduce new poisonous and harmful substance, may produce secondary pollution,
Process to follow-up waste water brings new difficulty etc..
Content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of salt-free pickling two step chrome tanner
Skill, completely avoid the use of salt, and the wet blue leather pure color being obtained by this technique, body bone is soft in this technical process
Soft, shrinkage temperature is up to more than 98 DEG C.
In order to achieve the above object, the technical scheme that the present invention takes is：
A kind of salt-free pickling two step chrome tanning process, comprises the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount
100% water, liming skin is ox-hide, sheepskin or pigskin, is subsequently adding the SF-1 chromium powder of liming tare weight amount 2%～3%, in temperature
20 DEG C～25 DEG C, rotate 2～4h；
2) formic acid after dilution or sulfuric acid solution are added by several times in first step tanning body lotion and by body lotion in 30min
PH is adjusted to 2.5～3.0, at 20 DEG C～25 DEG C, rotates 1～2h；Carry out second step tanning again, add liming tare weight amount 3%～
4% basicity 33% chromium powder, in 20 DEG C～25 DEG C of temperature, rotates 2h；Then little using liming tare weight amount 1.8%～2.2%
Soda is configured to the aqueous solution that concentration is 10%, point 6 additions, and every minor tick 20min adjusts pH to 3.8～4.0, rotates 1h,
Supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop drum overnight, next day turns 0.5h, goes out drum, take horse standing.
Described SF-1 chromium powder is a kind of tanning agent of the moon chromium complex class.
The beneficial effects of the present invention is：
If only carrying out complete chrome tanning using SF-1 tanning agent to softening pelt, the wet blue obtaining is faint in color, and grain is coarse,
Leather body more plate is hard.The present invention first carries out pre-tanning with SF-1 tanning agent to softening skin, then carries out salt-free pickling and conventional chrome tanning, obtains
Wet blue leather pure color, grain is careful, and leather body is soft, and avoids the use of neutral salt during pickling, greatly reduces tanning
The content of neutral salt in waste water.
Specific embodiment
Describe the present invention with reference to embodiment.
Embodiment one
A kind of salt-free pickling two step chrome tanning process, comprises the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount
100% water, liming skin is ox-hide, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 2%, in 22 DEG C of temperature, rotates 2h；
2) formic acid after dilution or sulfuric acid solution are added by several times in first step tanning body lotion and by body lotion in 30min
PH is adjusted to 2.2, at 22 DEG C, rotates 2h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 4%,
22 DEG C of temperature, rotates 2h；Then it is configured to, using liming tare weight amount 2.2% sodium bicarbonate, the aqueous solution that concentration is 10%, divide 6 times and add
Enter, every minor tick 20min, adjust pH to 4.0, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop rousing
At night, next day turns 0.5h, goes out drum, takes horse standing.
The present embodiment gained wet blue leather Ts is 103 DEG C.
Embodiment two
A kind of salt-free pickling two step chrome tanning process, comprises the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount
100% water, liming skin is pigskin, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 2.5%, in 20 DEG C of temperature, rotates
3h；
2) formic acid after dilution or sulfuric acid solution are added by several times in first step tanning body lotion and by body lotion in 30min
PH is adjusted to 3.0, at 20 DEG C, rotates 1h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 3.5%,
In 20 DEG C of temperature, rotate 2h；Then it is configured to, using the sodium bicarbonate of liming tare weight amount 1.8%, the aqueous solution that concentration is 10%, divide 6
Secondary addition, every minor tick 20min, adjust pH to 3.8, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop
Overnight, next day turns 0.5h to drum, goes out drum, takes horse standing.
The present embodiment gained wet blue leather Ts is 102 DEG C.
Embodiment three
A kind of salt-free pickling two step chrome tanning process, comprises the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount
100% water, liming skin is sheepskin, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 3%, in 25 DEG C of temperature, rotates 4h；
2) formic acid after dilution or sulfuric acid solution are added by several times in first step tanning body lotion and by body lotion in 30min
PH is adjusted to 3.0, at 25 DEG C, rotates 2h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 3%,
25 DEG C of temperature, rotates 2h；Then it is configured to, using the sodium bicarbonate of liming tare weight amount 2.2%, the aqueous solution that concentration is 10%, divide 6 times
Add, every minor tick 20min, adjust pH to 4.0, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop rousing
Overnight, next day turns 0.5h, goes out drum, takes horse standing.
The present embodiment gained wet blue leather Ts is 99 DEG C.
Example IV
A kind of salt-free pickling two step chrome tanning process, comprises the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount
100% water, liming skin is sheepskin, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 2.8%, in 25 DEG C of temperature, rotates
3.5h；
2) formic acid after dilution or sulfuric acid solution are added by several times in first step tanning body lotion and by body lotion in 30min
PH is adjusted to 2.8, at 25 DEG C, rotates 2h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 3.2%,
In 25 DEG C of temperature, rotate 2h；Then it is configured to, using the sodium bicarbonate of liming tare weight amount 2.0%, the aqueous solution that concentration is 10%, divide 6
Secondary addition, every minor tick 20min, adjust pH to 4.0, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop
Overnight, next day turns 0.5h to drum, goes out drum, takes horse standing.
The present embodiment gained wet blue leather Ts is 100 DEG C.
Claims (6)
1. a kind of salt-free pickling two step chrome tanning process is it is characterised in that comprise the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount 100%
Water, liming skin is ox-hide, sheepskin or pigskin, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 2%～3%, in temperature 20
DEG C～25 DEG C, rotate 2～4h；
2) formic acid after dilution or sulfuric acid solution are added in first step tanning body lotion by several times and in 30min, the pH of body lotion is adjusted
Save to 2.5～3.0, at 20 DEG C～25 DEG C, rotate 1～2h；Carry out second step tanning again, add liming tare weight amount 3%～4%
Basicity 33% chromium powder, in 20 DEG C～25 DEG C of temperature, rotates 2h；Then joined using the sodium bicarbonate of liming tare weight amount 1.8%～2.2%
Make the aqueous solution that concentration is 10%, point 6 additions, every minor tick 20min, adjust pH to 3.8～4.0, rotate 1h, supplement leaching
150%, 40 DEG C of hot water of graywall weight, turn 2h, stop drum overnight, next day turns 0.5h, goes out drum, take horse standing.
2. a kind of salt-free pickling two step chrome tanning process according to claim 1 it is characterised in that：Described SF-1 chromium powder is
A kind of tanning agent of the moon chromium complex class.
3. a kind of salt-free pickling two step chrome tanning process it is characterised in that：Comprise the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount 100%
Water, liming skin is ox-hide, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 2%, in 22 DEG C of temperature, rotates 2h；
2) formic acid after dilution or sulfuric acid solution are added in first step tanning body lotion by several times and in 30min, the pH of body lotion is adjusted
Save to 2.2, at 22 DEG C, rotate 2h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 4%, in temperature
22 DEG C, rotate 2h；Then it is configured to, using liming tare weight amount 2.2% sodium bicarbonate, the aqueous solution that concentration is 10%, point 6 additions,
Every minor tick 20min, adjusts pH to 4.0, rotates 1h, supplements 150%, 40 DEG C of hot water of liming tare weight amount, turns 2h, stops drum overnight,
Next day turns 0.5h, goes out drum, takes horse standing.
4. a kind of salt-free pickling two step chrome tanning process according to claim 1 it is characterised in that：Comprise the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount 100%
Water, liming skin is pigskin, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 2.5%, in 20 DEG C of temperature, rotates 3h；
2) formic acid after dilution or sulfuric acid solution are added in first step tanning body lotion by several times and in 30min, the pH of body lotion is adjusted
Save to 3.0, at 20 DEG C, rotate 1h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 3.5%, in temperature
20 DEG C of degree, rotates 2h；Then it is configured to, using the sodium bicarbonate of liming tare weight amount 1.8%, the aqueous solution that concentration is 10%, divide 6 times and add
Enter, every minor tick 20min, adjust pH to 3.8, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop rousing
At night, next day turns 0.5h, goes out drum, takes horse standing.
5. a kind of salt-free pickling two step chrome tanning process according to claim 1 it is characterised in that：Comprise the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount 100%
Water, liming skin is sheepskin, is subsequently adding the SF-1 chromium powder tanning agent of liming tare weight amount 3%, in 25 DEG C of temperature, rotates 4h；
2) formic acid after dilution or sulfuric acid solution are added in first step tanning body lotion by several times and in 30min, the pH of body lotion is adjusted
Save to 3.0, at 25 DEG C, rotate 2h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 3%, in temperature
25 DEG C, rotate 2h；Then it is configured to, using the sodium bicarbonate of liming tare weight amount 2.2%, the aqueous solution that concentration is 10%, divide 6 times and add
Enter, every minor tick 20min, adjust pH to 4.0, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop rousing
At night, next day turns 0.5h, goes out drum, takes horse standing.
6. a kind of salt-free pickling two step chrome tanning process according to claim 1 it is characterised in that：Comprise the following steps：
1) put into rotary drum after the liming severe edema due to hypofunction of the spleen after deashing and softening being washed and carry out first step tanning, add liming tare weight amount 100%
Water, liming skin is sheepskin, adds the SF-1 chromium powder tanning agent of liming tare weight amount 2.8%, in 25 DEG C of temperature, rotates 3.5h；
2) formic acid after dilution or sulfuric acid solution are added in first step tanning body lotion by several times and in 30min, the pH of body lotion is adjusted
Save to 2.8, at 25 DEG C, rotate 2h；Carry out second step tanning again, add basicity 33% chromium powder of liming tare weight amount 3.2%, in temperature
25 DEG C of degree, rotates 2h；Then it is configured to, using the sodium bicarbonate of liming tare weight amount 2.0%, the aqueous solution that concentration is 10%, divide 6 times and add
Enter, every minor tick 20min, adjust pH to 4.0, rotate 1h, supplement 150%, 40 DEG C of hot water of liming tare weight amount, turn 2h, stop rousing
At night, next day turns 0.5h, goes out drum, takes horse standing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134190.0A CN104726622B (en) | 2015-03-25 | 2015-03-25 | Salt-free pickling two-step chrome tanning process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510134190.0A CN104726622B (en) | 2015-03-25 | 2015-03-25 | Salt-free pickling two-step chrome tanning process |
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| CN104726622A CN104726622A (en) | 2015-06-24 |
| CN104726622B true CN104726622B (en) | 2017-02-22 |
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| CN112522455B (en) * | 2020-11-26 | 2022-02-11 | 无极县景森皮革制品有限公司 | Non-pickling tanning method for leather |
| CN114231672A (en) * | 2021-11-29 | 2022-03-25 | 无极县景森皮革制品有限公司 | Leather pickling-free, salt-free and high-absorption chrome tanning process method |
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| GB2458913A (en) * | 2008-04-01 | 2009-10-07 | Rhodia Operations | Tanning process |
| CN101974655B (en) * | 2010-10-15 | 2013-05-15 | 陕西科技大学 | Method for tanning non-pickling high-pH chrome leather by using chrome formate |
| CN103773908B (en) * | 2014-01-21 | 2016-03-23 | 中国皮革和制鞋工业研究院 | Ox-hide leather produces tanning without pickling method |
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