CN107868852A - A kind of New-type adjuvant for leather pickling procedure - Google Patents
A kind of New-type adjuvant for leather pickling procedure Download PDFInfo
- Publication number
- CN107868852A CN107868852A CN201610852210.2A CN201610852210A CN107868852A CN 107868852 A CN107868852 A CN 107868852A CN 201610852210 A CN201610852210 A CN 201610852210A CN 107868852 A CN107868852 A CN 107868852A
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- CN
- China
- Prior art keywords
- leather
- new
- type adjuvant
- pickling
- pickling procedure
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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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
Abstract
The invention provides a kind of New-type adjuvant for leather pickling procedure, and the usage of this New-type adjuvant.Contain organic acid compound, AEO surfactant, alkyl benzene sulfonate surfactant and calcium ions and magnesium ions chelate in this auxiliary agent.This auxiliary agent is used for the pickling procedure of leather industry, can effectively improve the absorption of chromium, reduce the use of chromium powder, while has the effect of improving leather yield of leather and tensile strength.The mechanism of height can be avoided in low ph value to the damage of surface, can also improve the solidity, careful property and flexibility of grain side of leather.Skin sample effect especially unnet to preceding process deliming is obvious.
Description
Technical field
The present invention relates to a kind of New-type adjuvant field of tanning production, it is more particularly related to which one kind is used for
The New-type adjuvant of leather pickling procedure, and the usage of this New-type adjuvant.
Background technology
Leather pickling pickling procedure is a more important process, and leather is by processes such as liming delimings so that rawhide
Interior fiber is unfolded, there is provided the precondition of tanning, but to there may be deliming unnet for preceding process, fiber cannot be abundant
The problem of unfolding, if without pickling procedure, it is understood that there may be the finished leather yield of leather of tanning diminishes, and leather calcium ions and magnesium ions are high and harden
The problems such as, resultant leather quality class is all greatly reduced.
For pickling pH below 3.2, now pH is less than the isoelectric point of pelt, easily produces acid plumping in process hides.Existing
Technique in, the salt of generally use 12%~14% (by raw hide restatement) suppresses pickling process and may in Chrome Tanning Process
Caused acid plumping.Which again increases the salt in tanning sewage and pollution of chromium, does not meet current environmentally friendly cleaner leather-making production
Objective, according to statistics, caused neutral salt during pickling, 30%~40% of neutral salt in tanning sewage can be accounted for.Reduce or disappear
Except the salt pollution and pollution of chromium of pickling chrome tanning process are to realize an important step of leather cleaning metaplasia production at this stage.To existing
There is technique change little, do not influence to reduce or eliminate by auxiliary agent in pickling chrome tanning process in the case of traditional wet blue leather performance
The pollution of salt and chromium, it is always a direction of many process hides scientific worker researchs.
The content of the invention
It is an object of the invention to provide a kind of New-type adjuvant for leather pickling procedure, to solve to exist in the prior art
Above mentioned problem, this auxiliary pickling agent performance of the invention is good, is used during pickling, can improve the absorption of chromium, reduces chromium
The use of powder, pollution is reduced, and yield of leather and tensile strength etc. can be improved, the mechanism of height can be avoided to the damage of surface
Wound, improve into the solidity, careful property and flexibility of grain.
The New-type adjuvant for blue leather wetting of the present invention is composed of the following components by weight percentage：
(a) organic acid compound 50%~70%
(b) AEO surfactant 0%~20%
(c) alkyl benzene sulfonate surfactant 5%~10%
(d) calcium ions and magnesium ions chelate 0%~20%
The auxiliary agent of the present invention various raw materials of reasonably arranging in pairs or groups, effectively plays various raw materials according to the characteristics of pickling process
Performance.Organic acid compound mainly selects binary organic carboxyl acid, and its effect is to provide low ph value, high degree of mechanical can be avoided to make
With the damage to surface, and the carboxyl contained in itself, combined during pickling with the amino in collagenous fibres, and binary carboxylic
The moderate chain length of acid also effective evacuation expansion for assisting fiber in leather after being combined with collagenous fibres so that leather rate improves.Together
When add crosslinking points of the chromium in leather again, play pre-tanning effect.In subsequent Chrome Tanning Process with the trivalent chromium in chrome tanning agent
There is stronger binding ability, effectively chromium can be fixed in leather, improve the absorption of chromium, be not easy to wash away.It can thus subtract
Lack the use of chrome tanning agent, and avoid chromium to influence resultant leather quality amplification quantity high concentration chrome wastewater side by side from the loss in leather, it is dirty
Contaminate environment.Simultaneously as improving the absorption of chromium, tanning effect is enhanced, and tensile strength of finished leather etc. is increased.
The carboxyl of calcium ions and magnesium ions chelate and organic carboxyl acid has good chelation to calcium ions and magnesium ions, can be with sequestration
Expect the calcium ions and magnesium ions that preceding process is un-cleared in body lotion and skin sample, make leather softness and grain is careful, feel is submissive happy.
The collocation of nonionic and anion surfactant accelerates pickling speed, association using can guarantee that good permeability
Help the absorption of various materials in body lotion, help fully dispersed between leather collagen fiber unfold so that the yield of leather of finished leather obtains
Certain raising.Cause pickled skin further left and right, softness of the blue skin obtained after tanning in subsequent Chrome Tanning Process simultaneously
Degree, the flat fineness of grain, graining definition and tensile strength all increase.
Embodiment
With reference to the composition contained by this New-type adjuvant and application method, by embodiment, the present invention is further described.
Embodiment 1
A kind of New-type adjuvant for leather pickling procedure, its composition composition are：Glutaric acid 60%, paregal O-
1510%, neopelex 10%, segregation sodium phosphate 20%, it is sufficiently mixed after grinding.By following technique to leaching
Tannage carries out pickling procedure, and with carrying out Experimental Comparison without using auxiliary pickling agent.
Added material usage is based on pigskin soaks the quality removed from office in nitre
Leaching tannage is weighed：1.8mm ± 0.2mm (bilayer)
Wash the vexed washing of the normal temperature of distilled water 300% one time 5 '
Soften 100% 35 DEG C of distilled water
The pH7.5-8.0 of 2 CO of Na, 3 0.5+0.6% 10 '
Macerating enzyme SO 2.0%
The Cl 0.5% of NH 4
Degreasing agent FB stops 30 ' for 0.5% turn 60 '
Turn 90 ' and stop 30 '
Turn 60 ' rear washings again
50 skins are chosen, the inside is upward, and skin is cut off into left and right unanimously forward from rear buttocks, the split of area identical two, and
Respectively with R1, L1；R2, L2......R50, L50 mark respectively, and the split of the left side half adds 1# rotary drums, and the split of the right half adds
2# rotary drums, add auxiliary pickling agent and carry out contrast test, wherein, 1# rotary drums are not added with auxiliary pickling agent, and 2# rotary drums add auxiliary pickling agent
100% 20 DEG C of pickling distilled water
Salt 10% 15 '
The 1# rotary drums pH2.8 of 2 SO 4 (20: 1) of H 1.0% ±
(2# rotary drums add 2 SO of H and add 1.0% auxiliary pickling agent after 4 30 minutes) 2# rotary drums pH3.0 ±
Chromium powder 4.0% 30 '
Chromium powder 6.0% 120 '
Sodium formate 1.0% 30 '
Sodium bicarbonate 1.3% 4 × 15 '+60 '
1# rotary drums pH4.0 ±, 2# rotary drums pH3.9 ±
Temperature stops rousing for 40 DEG C 120 ' in heating water 100%
After washing out drum, gained wet blue carries out area contrast with the left half skin of a skin with right half skin, and passes through hand
The indexs such as sense, waste water total hardness are further evaluated.
As a result it is as follows：
1st, by measuring area, after adding auxiliary pickling agent, chi 0.5% is averagely increased.
2nd, after adding auxiliary pickling agent, grain side of leather is cleaner, clear, careful.
3rd, the absorptivity of chromium is more preferable, and waste liquid is more clear.
4th, further degreasing and calcium ions and magnesium ions from pickled skin, make leather more soft, fineness is more preferable.Add auxiliary pickling agent
Afterwards, hardness is 10.44mg/L in its waste liquid, and does not add auxiliary pickling agent, and hardness is 6.62mg/L in waste liquid.
Claims (2)
1. a kind of New-type adjuvant for leather pickling procedure, it is characterised in that exist with solid, powdery, by following four component
Composition：
(a) organic acid compound 50%~60%
(b) AEO surfactant 10%~20%
(c) alkyl benzene sulfonate surfactant 5%~10%
(d) calcium ions and magnesium ions chelate 20%
Described organic acid compound is selected from one of following：Glutaric acid, adipic acid, suberic acid.
2. the New-type adjuvant according to claim 1 for leather pickling procedure, it is characterised in that described poly alkyl alcohol
Oxygen ethene ether surface active agent composition, selected from one of following：Paregal O -15, paregal O -20；Described alkyl benzene sulphonate
Salt surfactant is：Neopelex；Described calcium ions and magnesium ions chelate, selected from one of following：Tripolyphosphate
Sodium, sodium dihydrogen phosphate, disodium hydrogen phosphate, sodium orthophosphate, sodium pyrophosphate, calgon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610852210.2A CN107868852A (en) | 2016-09-26 | 2016-09-26 | A kind of New-type adjuvant for leather pickling procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610852210.2A CN107868852A (en) | 2016-09-26 | 2016-09-26 | A kind of New-type adjuvant for leather pickling procedure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107868852A true CN107868852A (en) | 2018-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610852210.2A Pending CN107868852A (en) | 2016-09-26 | 2016-09-26 | A kind of New-type adjuvant for leather pickling procedure |
Country Status (1)
| Country | Link |
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| CN (1) | CN107868852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232891A (en) * | 2022-07-28 | 2022-10-25 | 四川大学 | Leather-making ammonium-free deliming agent with grain surface protection function and deliming method |
-
2016
- 2016-09-26 CN CN201610852210.2A patent/CN107868852A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232891A (en) * | 2022-07-28 | 2022-10-25 | 四川大学 | Leather-making ammonium-free deliming agent with grain surface protection function and deliming method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180403 |
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| WD01 | Invention patent application deemed withdrawn after publication |