Composite automatic basifying agent for tanning leathers

An alkali-raising agent and tanning technology, which is applied in the field of compound automatic alkali-raising agents, can solve problems such as slowness, inability to meet accuracy, and increased workload of staff

Inactive Publication Date: 2014-04-02
SHANDONG HUASHENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the alkali-raising agents currently used are single basic compounds, such as sodium bicarbonate. Since the alkalinity of the tanning liquor needs to be strictly controlled during the tanning process, the pH value should be raised from 3 to 4. , needs to be accurate to a pH value of 4, and requires that the increase of the alkalinity be carried out slowly, and the release rate of hydroxide needs to be strictly controlled, and the alkali-raising agent used in the prior art needs to strictly control the time and the amount added in batches Add 3 to 4 times, which can neither satisfy the accuracy, but also cause a substantial increase in the workload of the staff

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A compound automatic alkali-raising agent for leather tanning is prepared by compounding 25 parts of magnesium carbonate, 30 parts of calcium carbonate, 14 parts of sodium carbonate and 18 parts of sodium formate in parts by weight, and the filler is sodium sulfate.

[0018] Described magnesium carbonate, calcium carbonate, sodium carbonate are 110 mesh powders.

[0019] The sodium formate is a 230 mesh powder.

Embodiment 2

[0021] A compound automatic alkali-raising agent for leather tanning is prepared by compounding 83 parts of magnesium oxide, 8 parts of sodium carbonate, 8 parts of sodium metasilicate and 20 parts of sodium oxalate in parts by weight, and the filler is sodium sulfate.

[0022] The magnesium oxide is a 160-mesh powder.

[0023] The sodium carbonate is 100 mesh powder.

[0024] The sodium metasilicate and sodium oxalate are 240 mesh powders.

Embodiment 3

[0026] A compound automatic alkali-raising agent for leather tanning is prepared by compounding 65 parts of magnesium oxide, 6 parts of sodium carbonate, 7 parts of sodium metasilicate and 18 parts of sodium oxalate in parts by weight, and the filler is sodium sulfate.

[0027] The magnesium oxide is a 180-mesh powder.

[0028] The sodium carbonate is a 90 mesh powder.

[0029] The sodium metasilicate and sodium oxalate are 220 mesh powders.

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PUM

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Abstract

The invention belongs to the technical field of leather tanning, in particular relates to composite automatic basifying agent for tanning leathers. The composite automatic basifying agent for tanning the leathers is characterized by being compounded through at least two of magnesium oxide, calcium oxide, magnesium carbonate, calcium carbonate, sodium carbonate, metasilicate, phosphate, formate and oxalate; packing is sodium sulfate. The basifying agent is added at one time, so that the hydroxyl release rate can be precisely controlled, and the final pH value can be controlled as 4.

Description

technical field [0001] The invention belongs to the technical field of tanning, and in particular relates to a compound automatic alkali-raising agent for leather tanning. Background technique [0002] Leather tanning is the chemical and physical processing of the protein in the skin with tannins. It uses a series of processes and uses some chemical agents to make a series of changes in the protein in the hides of cattle, pigs, sheep and other animals, and to denature the collagen. The tanned leather is soft, firm and wear-resistant, and it is not easy to rot and deteriorate. Therefore, the tanned leather can be used to make various leather daily necessities. According to the conditions of middle school, this experiment only introduces the tanning process which is easier to master. [0003] Chrome tanning is the main tanning method for modern light leather. The conventional one-bath chrome tanning method is to use the pickling waste liquid in the original drum to add the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/00C14C3/06
Inventor 胡康马学军傅春芳
Owner SHANDONG HUASHENG CHEM TECH
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