CN107201414B - A kind of not pickling chrome-free tanning technique based on more metal combination tanning agents - Google Patents
A kind of not pickling chrome-free tanning technique based on more metal combination tanning agents Download PDFInfo
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- CN107201414B CN107201414B CN201710413427.8A CN201710413427A CN107201414B CN 107201414 B CN107201414 B CN 107201414B CN 201710413427 A CN201710413427 A CN 201710413427A CN 107201414 B CN107201414 B CN 107201414B
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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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Abstract
The present invention relates to tanning chemistries and field of engineering technology, a kind of not pickling chrome-free tanning technique based on more metal combination tanning agents is provided, first softening pelt is pre-processed, then not pickling chrome-free tanning is carried out, pass through the white wet careful consolidation of grain of the not pickling chrome-free tanning technique production based on more metal combination tanning agents, color is uniformly full, it is soft and full flexible to remove from office body, shrinkage temperature is more than 90 DEG C, and it is described based on the not pickling chrome-free tanning technique of more metal combination tanning agents in implementation process, do not use chromate-containing materials, and it is operated without pickling, chloride ion content in waste tanning liquor can be not only set to be reduced to 300mg/L or less, and also eliminate pollution and harm of the heavy metal chromium to environment, furthermore the technique also simplifies the technological process of production, shorten the production cycle, reduce production cost, it is A kind of process for cleanly preparing with good industrialization prospect.
Description
Technical field
The present invention relates to tanning chemistry and field of engineering technology, in particular to a kind of not soaking based on more metal combination tanning agents
Sour chrome-free tanning technique.
Background technique
As national economy level and living standards of the people are higher and higher, people to the concern of living environment also increasingly
Greatly, country and governments at all levels are also more and more perfect to environmental protection legislation, and leather industry pollution problem has become entire industry can
The huge challenge of sustainable development.Leather industry is to use water rich and influential family, and according to statistics, leather industry waste water yield is about 1.42 within 2014
Hundred million m3, complicated component, containing multiple pollutants such as chromium, sulphur, chlorine, ammonia nitrogen, organic matters, difficulty of governance is big, at high cost, therefore such as
Process hides water pollution, which is mitigated or eliminated, in what becomes the most important thing of leather industry research." process hides and the hair of newest execution in China
Skin processing industry pollution discharge standard " various pollutants content in leather-making waste water is made that sternly in (GB30486-2013)
Lattice limitation, wherein total chrome content must not exceed 1.5mg/l, and content of 6-valence Cr ions need to be lower than 0.2mg/L, and chloride ion content need to be less than
3000mg/L。
The defects of wasting for pollution of chromium brought by chrome tanning and chromium resource and deficiency, people turn to sight to Chrome-free
The research of tanning agent and tannage, and a large amount of research and probe has been carried out, (such as such as aldehyde tannage, oil tanning, vegetable tanning, other non-chromium metal tans
Zirconium, aluminium, titanium, iron, magnesium, zinc, rare earth etc.) and various Chrome-free Combined tannings etc..Regrettably, using above-mentioned chrome-free tanning agent and its tan
Leather obtained by method, quality can not all compare favourably with chrome leather.
Meanwhile the pH value for carrying out pickling processing to adjust skin is typically required before current leather tanning, at pickling
Pelt of the enzyme after soft is immersed in the mixed solution of sulfuric acid and salt by reason, carries out hide fiber, tanning material is easy to penetrate, so that being made
Leather it is softer careful, still, when pickling, needs using a large amount of neutral salt, " acid is swollen " phenomenon occurs to avoid leather, can
Neutral salt adds the infiltration for being not only unfavorable for tanning initial stage tanning agent, but also the intensity of serious damage skin, if neutral salt dosage is excessive, again
Skin dehydration, finished leather can be made flat thin, not plentiful；Simultaneously because use pickling handle, then tanning later period, tanning agent and collagen with
When in conjunction with being main, acid must be neutralized at this time, make collagen carboxyl dissociation, chrome tanning agent molecule increase, but mention alkali operation it is slightly improper,
Then it is easy to appear such as grains coarse, chromium spot and other issues；And pickling can also bring the pollution of chloride ion；Therefore, it soaks
Sour process increases the use of material, increases technique controlling difficulty, and have adverse effect on to environment.And if not pickling is straight
Row leather tanning is tapped into, final leather obtained will appear the phenomenon that tan is impermeable, flexibility is poor, leather is stiff, color burn, no
It can satisfy light color leather or clothing leather requirement, the technique scope of application is limited, it is difficult to production application.
Therefore, how to realize no pickling and the process for tanning without the dual beneficial advantage of chrome tanning is that leatherwork technical field is real
The key technical problem of existing quality assurance and environmentally friendly effectiveness.For the technical problem, number of patent application 201210269479.X
Chinese patent disclose it is a kind of based on Zirconium-aluminum-titanium cooperation tanning agent chrome-reduced leather method, no leaching can be realized by this method
The purpose of acid, few chrome tanning, but its final leather obtained has still remained color burn and other issues, and be discharged waste water according to
So contain chromium, can not effectively realize cleanly production.
In order to solve pickling bring in traditional leather industry, tanning chemistry men propose salt-free pickling and not pickling tan
The method of system is still difficult to although achieving good research achievement in production application.Therefore, exploitation is based on more
The not pickling bating method without chrome of metal combination tanning agent has great importance, and not only can thoroughly eliminate pollution of chromium problem, and
And chloride ion content in waste liquid can also be greatly lowered, improve the level of clean production in leather making process.
Summary of the invention
Therefore, for above-mentioned problem, the present invention proposes a kind of not pickling chrome-free tanning based on more metal combination tanning agents
Technique, by the careful consolidation of white wet grain of the not pickling chrome-free tanning technique production based on more metal combination tanning agents,
Color is uniformly full, and leather body is soft and full flexible, and shrinkage temperature is more than 90 DEG C, and described based on more metal combination tanning agents
Not pickling chrome-free tanning technique does not use chromate-containing materials in implementation process, and operates without pickling, can not only make tanning useless
In liquid chloride ion content be reduced to 300mg/L hereinafter, and also eliminate pollution and harm of the heavy metal chromium to environment, furthermore institute
It states technique and also simplifies the technological process of production, shorten the production cycle, reduce production cost, be a kind of with good industrialization
The process for cleanly preparing of prospect.
To realize above-mentioned technical problem, the solution that the present invention takes are as follows: it is a kind of based on more metal combination tanning agents not
Pickling chrome-free tanning technique, in turn includes the following steps:
Step 1, preparation softening pelt, weigh the weight of softening pelt, determine subsequent treatment process step by the weight
The weight of middle agents useful for same；
Step 2, pretreatment (reagent dosage is based on the percentage of softening pelt weight): it is added 30-50%'s in rotary drum
Water, interior 22-26 DEG C of the temperature of drum, rotates 20min, the pretreating agent of 2-4% is added, rotate 30-60min；The pretreating agent thing
First with water according to pretreating agent: water=1:5 ratio is diluted；The pretreating agent is changing for this tal fibre Chemical Co., Ltd.
Property glutaraldehyde SYNEKTAN GTA, be free of formaldehyde, mass fraction is about 50% or the pretreating agent is that engrave many chemical industry limited
The substituted type syntans TANINTAN BOV of company, mass fraction is about 42%；
Step 3, tanning (reagent dosage is based on the percentage of softening pelt weight): the more of 25-45% are added in step 2
The electrolyte-resistant oil of metal combination tanning agent, 0.5-1%, rotates 300-360min, stands overnight；
Step 4 mentions alkali (reagent dosage is based on the percentage of softening pelt weight): sodium formate 1.0- being added in step 3
1.5%, interior 28-32 DEG C of the temperature of drum rotates 30min, and adding saleratus solution and adjusting PH is 4.2-4.5, rotates 60min, then
The fluoropolymer resin tanning agent of 1-3% is added, rotates 60-90min；Wherein the saleratus solution is sodium bicarbonate water according to little Su
Beat: water=1:20 dilution proportion obtains；
Step 5, fluid infusion heating (reagent dosage is based on the percentage of softening pelt weight): 120- is added in step 4
150% warm water is warming up to 42-46 DEG C, rotates 180-240min, drain；
Step 6, washing (reagent dosage is based on the percentage of softening pelt weight): add 150-200%'s in rotary drum
22-26 DEG C of water, rotates 5-10min, and drain goes out to rouse.
Further, more metal combination tanning agents are that the Zirconium-aluminum-titanium that Jin Kun Chemical Co., Ltd. in Mianzhu City produces is more
Gold complex, mass fraction are about 40%.
Further, iron-zirconium-aluminium that more metal combination tanning agents are the production of Mianzhu City Jin Kun Chemical Co., Ltd. is matched
Tanning agent is closed, mass fraction is about 40%.
Further, saleratus solution described in step 4 is to be added several times, softening pelt weight 0.3- is added every time
0.5% saleratus solution, each interval time are 20-30min, and terminal PH is 4.2-4.5.
Further, fluoropolymer resin tanning agent described in step 4 is the polymer tanning agent of Sima Chemical Co., Ltd.
NOVALTAN MAP, mass fraction are about 30%.
By using preceding solution, the beneficial effects of the present invention are:
1, in the not pickling chrome-free tanning technique based on Zirconium-aluminum-titanium cooperation tanning agent, the material previously treated used is phenols conjunction
At tanning agent BOV or modified glutaraldehyde GTA, phenols syntans can by the active group and complexing of metal ion of intramolecular,
The alkaline resistance properties of tanning agent is improved, promote tanning agent in intracutaneous infiltration and is combined, to improve the shrinkage temperature of crust leather, is effectively avoided
When not pickling surface in conjunction with and phenomenon too fast and that tan is impermeable；And modified glutaraldehyde has promotion to more metal combination tanning properties
Effect can promote tanning agent in intracutaneous infiltration, and the aldehyde radical of intramolecular can carry out covalent bond with the amino on collagen side chain,
Ligand weaker in multi-metal complex can also be replaced simultaneously, reinforce tanning agent tanning effect, formed between tropocollagen molecule more steady
Fixed cross-bond so that crust leather shrinkage temperature is obviously improved, when effectively avoiding not pickling surface in conjunction with and too fast and tan not
Saturating phenomenon；Meanwhile in present invention process in the case where not pickling, only matched by more metal combination tanning agents and electrolyte-resistant oil
Conjunction can efficiently accomplish tanning, improve tanning quality, and the tanning stage contains chrome tanning agent without any, and using in colourless
More metal combination tanning agents of transparency liquid carry out tanning, crust leather will not be made colored with its tanning, can effectively obtain white wet leather, phase
Dye light color, the present invention not pickling chrome-free tanning work are not easy in post-production for turquoise crust leather made from prior art chrome tanning
White crust leather made from skill is easy to contaminate light color in post-production, then crust leather made from present invention process can be suitable for manufacture light color
Leather；Therefore, the not pickling chrome-free tanning technique based on Zirconium-aluminum-titanium cooperation tanning agent can also after omitting pickling procedure
Effective tanning that leather is enough effectively ensured, is suitable for the features such as light color leather at the superior physical properties quality that leather is made；And it is described
Not pickling chrome-free tanning technique based on more metal combination tanning agents, is omitted pickling procedure so that entire process flow it is simpler,
More convenient operation, and life cycle of the product is shortened, production cost has been saved, there is very strong practicability.
2, to prepare white wet grain by the not pickling chrome-free tanning technique based on more metal combination tanning agents careful tight
In fact, color is uniformly full, and leather body is soft and full flexible, and more metal combination tanning agents are by the various metals ion phase such as zirconium, aluminium
Mutually cooperate, there is between them collaboration tanning effect so that white wet leather with preferable hydrothermal stability and it is good after
Continuous processing performance.
3. the not pickling chrome-free tanning technique based on more metal combination tanning agents, with more metal combination pickling, tanning works
Skill, conventional chrome tanning process are compared, the clean manufacturing advantage with highly significant, in the waste tanning liquor generated by the technique
The contamination indexes such as COD, chloride ion content and coloration significantly reduce, and especially chloride ion content can be effectively reduced to 300mg/
L is hereinafter, the direct emission for having reached national standard requires, and the technique does not use chromate-containing materials in implementation process, from
Pollution and harm of the chromium to environment are eliminated on source, are a kind of process for cleanly preparing with huge industrialization prospect.
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below with reference to specific embodiment, how skill is applied to the present invention whereby
Art means solve technical problem, and the realization process for reaching technical effect can fully understand and implement.If not referring in particular to
Conventional means bright, that technological means employed in embodiment is well known to those skilled in the art, used reagent and production
Product are also available commercial.The various processes and method being not described in detail are conventional methods as known in the art, used
The source of reagent, trade name and it is necessary to list its constituent person, are indicated on the first occurrence.
Embodiment 1
A kind of not pickling chrome-free tanning technique based on more metal combination tanning agents, in turn includes the following steps:
Step 1, preparation softening pelt, weigh the weight of softening pelt, determine subsequent treatment process step by the weight
The parts by weight of middle agents useful for same；
Step 2, softening pelt pretreatment (reagent dosage is based on the percentage of softening pelt weight): it is added in rotary drum
50% water, interior 22-26 DEG C of the temperature of drum rotate 20min, and with the pretreating agent of water 1:5 diluted 3%, (engraving many chemical industry has for addition
The TANINTAN BOV of limit company), rotate 60min；
Step 3, tanning (reagent dosage is based on the percentage of softening pelt weight): 40% mostly gold is added in step 2
Belong to the cooperation tanning agent Zirconium-aluminum-titanium of Jin Kun Chemical Co., Ltd. (cooperate with tanning agent), 1% electrolyte-resistant oil (have up to prestige science and technology share
The GHL of limit company), 360min is rotated, is stood overnight；
Step 4 mentions alkali (reagent dosage is based on the percentage of softening pelt weight): 1.2% formic acid being added in step 3
Sodium (regular industrial sodium formate), interior 30 DEG C of the temperature of drum, rotates 30min, adds with the diluted sodium bicarbonate (regular industrial of water 1:20
Sodium bicarbonate) solution, adjusting pH is 4.3-4.4, rotates 60min, adding 2% fluoropolymer resin tanning agent, (Si Mahuaxue is limited
The NOVALTAN MAP of company), rotate 90min；
Step 5, fluid infusion heating (reagent dosage is based on the percentage of softening pelt weight): 150% is added in step 4
Warm water is warming up to 45 DEG C, rotates 180min, drain；
Step 6, washing (reagent dosage is based on the percentage of softening pelt weight): 200% 22-26 is added in rotary drum
DEG C water, rotates 10min, and drain goes out to rouse.
Comparative example 1
A kind of not pickling chrome-free tanning technique based on more metal combination tanning agents of no pretreating process successively includes as follows
Step:
Step 1, preparation softening pelt, weigh the weight of softening pelt, determine subsequent treatment process step by the weight
The parts by weight of middle agents useful for same；
Step 2, tanning (reagent dosage is based on the percentage of softening pelt weight): 40% mostly gold is added in step 2
Belong to the cooperation tanning agent Zirconium-aluminum-titanium of Jin Kun Chemical Co., Ltd. (cooperate with tanning agent), 1% electrolyte-resistant oil (have up to prestige science and technology share
The GHL of limit company), 360min is rotated, is stood overnight；
Step 3 mentions alkali (reagent dosage is based on the percentage of softening pelt weight): 1.2% formic acid being added in step 3
Sodium (regular industrial sodium formate), 30 DEG C of interior temperature rotate 30min, add with the diluted sodium bicarbonate of water 1:20 (regular industrial little Su
Beat) solution, adjusting pH is 4.3-4.4, rotates 60min, adds 2% fluoropolymer resin tanning agent (Sima Chemical Co., Ltd.
NOVALTAN MAP), rotate 90min；
Step 4, fluid infusion heating (reagent dosage is based on the percentage of softening pelt weight): 150% is added in step 4
Warm water is warming up to 45 DEG C, rotates 180min, drain；
Step 5, washing (reagent dosage is based on the percentage of softening pelt weight): 200% room temperature is added in rotary drum
Water, rotates 10min, and drain goes out to rouse.
Not pickling chrome-free tanning technique based on more metal combination tanning agents described in the process for tanning and embodiment 1 of comparative example 1
Almost the same, difference is: the pretreatment process without containing step 2 described in embodiment 1 in comparative example 1.
Comparative example 2
A kind of pickling chrome-free tanning technique based on more metal combination tanning agents, in turn includes the following steps:
Step 1, preparation softening pelt, weigh the weight of softening pelt, determine subsequent treatment process step by the weight
The parts by weight of middle agents useful for same；
Step 2, pickling (reagent dosage is based on the percentage of softening pelt weight): being added 50% water in rotary drum, interior
8% sodium chloride (regular industrial salt) is added in warm room temperature, rotates 10min, is added (normal with the formic acid of water 1:10 diluted 0.8%
Advise industry formic acid), 30min is rotated, point 4 additions sulfuric acid (regular industrial sulfuric acid) of water 1:20 diluted 1.2%, between each
Every 30min, pH to 2.5 is adjusted, 90min is then rotated；
Step 3, tanning (reagent dosage is based on the percentage of softening pelt weight): 1% both sexes three are added in step 2
Poly cyanamid (the TANINTAN RX-L of Ming Zhong Chemical Co., Ltd.) rotates 30min, adds 2% aldehyde tanning agent (BASF
The Relugan GTW of work Co., Ltd), 40min is rotated, 15% Zirconium-aluminum-titanium cooperation tanning agent, 0.5% phosphate leaching is added
Sour oil (the TRUPON PEM of Tang Pule Chemical Co., Ltd.), rotates 60min, be added 15% Zirconium-aluminum-titanium cooperation tanning agent,
0.5% phosphate pickling oil, rotates 60min, adds 1% water-soluble polymer tanning agent (BASF Chemical Co., Ltd.
Relugan RF), rotate 40min；
Step 4 mentions alkali (reagent dosage is based on the percentage of softening pelt weight): being added in step 3 dilute with water 1:15
The saleratus solution released, adjusting pH are 4.0-4.2, and the addition for mentioning sodium bicarbonate during alkali is performed in multiple times, and are added every time
The sodium bicarbonate of pickled skin parts by weight 0.4%, each interval time are that 25min is stood overnight after reaching regulation pH；
Step 5, fluid infusion heating (reagent dosage is based on the percentage of softening pelt weight): 150% is added in step 4
Warm water is warming up to 40 DEG C, rotates 120min, drain；
Step 6, washing (reagent dosage is based on the percentage of softening pelt weight): 200% room temperature is added in rotary drum
Water, rotates 10min, and drain goes out to rouse.
Not pickling chrome-free tanning technique based on more metal combination tanning agents described in the process for tanning and embodiment 1 of comparative example 2
Almost the same, difference is: the pretreatment process without containing step 2 described in embodiment 1 in comparative example 3, while comparative example 3 is being made
After standby softening pelt, pickling procedure has been carried out before tanning.
Comparative example 3
A kind of not pickling less chrome tannage technique based on more metal combination tanning agents, in turn includes the following steps:
Step 1, preparation softening pelt, weigh the weight of softening pelt, determine subsequent treatment process step by the weight
The parts by weight of middle agents useful for same；
Step 2, more metal combination tans (reagent dosage is based on the percentage of softening pelt weight): it is added in rotary drum
100% water, interior temperature room temperature are added 2% Zirconium-aluminum-titanium cooperation tanning agent, rotate 20min, 3% Zirconium-aluminum-titanium cooperation is added
Tanning agent and 0.5% kaolin (Shanghai Jing Zhu Chemical Co., Ltd.), rotate 60min, add 3% Zirconium-aluminum-titanium cooperation tan
Agent and 0.5% kaolin, rotate 120min, sodium bicarbonate adjusting be added and mentions alkali, adjusts pH to 2.5.
Step 3, chrome tanning (reagent dosage is based on the percentage of softening pelt weight): 3% chrome tanning agent is added in step 2
(Chongqing the people live in plenty Chemical Co., Ltd.) rotates 60min；
Step 4 mentions alkali (reagent dosage is based on the percentage of softening pelt weight): 1.0% formic acid being added in step 3
Sodium, 30 DEG C of interior temperature rotate 30min, add with the diluted saleratus solution of water 1:20, and adjusting pH is 3.8, rotate 60min；
Step 5, fluid infusion heating (reagent dosage is based on the percentage of softening pelt weight): 150% is added in step 4
Warm water is warming up to 40 DEG C, rotates 180min, stands overnight, and next day rotates 30min, drain.
Step 6, washing (reagent dosage is based on the percentage of softening pelt weight): 200% room temperature is added in rotary drum
Water, rotates 10min, and drain goes out to rouse.
Comparative example 3 is for embodiment 1: comparative example 3 and embodiment 1 compare without using pickling technique
Contain chrome tanning in the tanning of example 3.
By the testing result in waste liquid obtained by the process for tanning of embodiment 1 and comparative example 1-3 in relation to pollutant load, gained
The physical quality detection Comparative result of leather is as shown in table 1 below:
Table 1, testing result contrast table
According to the comparing result of table 1 as it can be seen that compared with comparative example 1 is without pretreated process for tanning, embodiment 1
Crust leather performance obtained by not pickling chrome-free tanning technique based on more metal combination tanning agents has a distinct increment, and is mainly reflected in crust leather receipts
Contracting temperature increases by 10 DEG C or more, and grain is more preferably careful；Meanwhile lacking the process for tanning phase of chrome tanning with the not pickling of comparative example 3
Than although crust leather shrinkage temperature obtained by the not pickling chrome-free tanning technique based on more metal combination tanning agents of embodiment 1 is dropped
It is low, but crust leather color is more shallow, is suitble to manufacture light color leather, application range is wider, and has in terms of reducing ambient pollution burden
There are more preferably apparent advantage, especially Chrome-free in waste tanning liquor, coloration is lower than 30, and having reached national standard, " process hides and fur add
Work industrial water pollution object discharge standard " direct emission standard requirements as defined in (GB 30486-2013)；Therefore, of the present invention
The not pickling chrome-free tanning technique based on more metal combination tanning agents have apparent excellent effect.
In conclusion passing through the white wet leather grain of the not pickling chrome-free tanning technique production based on more metal combination tanning agents
The careful consolidation in face, color are uniformly full, and leather body is soft and full flexible, and shrinkage temperature is more than 90 DEG C, and more metals have collaboration
Tanning effect, so that crust leather has good comprehensive performance and properties for follow, and described based on more metal combination tanning agents
Not pickling chrome-free tanning technique do not use chromate-containing materials in implementation process, and operated without pickling, can not only make tanning
In waste liquid chloride ion content be reduced to 300mg/L hereinafter, and also eliminate pollution and harm of the heavy metal chromium to environment, furthermore
The technique also simplifies the technological process of production, shortens the production cycle, reduces production cost, is a kind of with good industry
The process for cleanly preparing of change prospect.
The foregoing descriptions are merely the embodiment using this origination techniques content, any those skilled in the art use this wound
Make done modifications and changes, all belong to the scope of the patents of this creation opinion, and is not limited to those disclosed embodiments.
Claims (5)
1. a kind of not pickling chrome-free tanning technique based on more metal combination tanning agents, which is characterized in that in turn include the following steps:
Step 1, preparation softening pelt, weigh the weight of softening pelt, determine institute in subsequent treatment process step by the weight
With the weight of reagent；
Step 2, pretreatment: being added the water of 30-50% in rotary drum, and 22-26 DEG C of temperature in drum rotates 20min, and 2-4% is added
Pretreating agent, rotate 30-60min；The pretreating agent is in advance with water according to pretreating agent: water=1:5 ratio carries out dilute
It releases；The pretreating agent is the modified glutaraldehyde SYNEKTAN GTA of this tal fibre Chemical Co., Ltd., is free of formaldehyde, mass fraction
For 50% or the pretreating agent be Ming Zhong Chemical Co., Ltd. substituted type syntans TANINTAN BOV, quality point
Number is 42%；
Step 3, tanning: more metal combination tanning agents of 25-45%, the electrolyte-resistant oil of 0.5-1%, rotation are added in step 2
300-360min is stood overnight；
Step 4 mentions alkali: sodium formate 1.0-1.5% being added in step 3,28-32 DEG C of temperature in drum rotates 30min, adds
It is 4.2-4.5 that saleratus solution, which adjusts pH, rotates 60min, adds the fluoropolymer resin tanning agent of 1-3%, rotates 60-
90min;Wherein the saleratus solution be sodium bicarbonate with water according to sodium bicarbonate: water=1:20 dilution proportion obtains；
Step 5, fluid infusion heating: the warm water of 120-150% being added in step 4, is warming up to 42-46 DEG C, rotates 180-240min,
Drain；
Step 6, washing: adding 22-26 DEG C of the water of 150-200% in rotary drum, rotates 5-10min, and drain goes out to rouse.
2. the not pickling chrome-free tanning technique according to claim 1 based on more metal combination tanning agents, it is characterised in that: institute
The more gold complexs of Zirconium-aluminum-titanium that more metal combination tanning agents are the production of Mianzhu City Jin Kun Chemical Co., Ltd. are stated, mass fraction is
40%.
3. the not pickling chrome-free tanning technique according to claim 1 based on more metal combination tanning agents, it is characterised in that: institute
It states iron-zirconium-aluminium that more metal combination tanning agents are the production of Mianzhu City Jin Kun Chemical Co., Ltd. and cooperates tanning agent, mass fraction is
40%.
4. the not pickling chrome-free tanning technique according to claim 1 based on more metal combination tanning agents, it is characterised in that: step
Saleratus solution described in rapid 4 is to be added several times, the saleratus solution of softening pelt weight 0.3-0.5% is added every time, often
The minor tick time is 20-30min, and terminal pH is 4.2-4.5.
5. the not pickling chrome-free tanning technique according to claim 1 based on more metal combination tanning agents, it is characterised in that: step
Fluoropolymer resin tanning agent described in rapid 4 is the polymer tanning agent NOVALTAN MAP of Sima Chemical Co., Ltd., mass fraction
It is 30%.
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| CN103131803A (en) * | 2011-11-22 | 2013-06-05 | 郑州赛诺生态科技有限公司 | Tanning agent of non-chromium non-aldehyde multi-metal ecological leather and tanning method |
| CN103898252A (en) * | 2012-12-30 | 2014-07-02 | 天津联一科技有限公司 | Novel non-salt and non-acid tanning process of fur |
| 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 |
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