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Production process of curing agent for yarn impregnation

A production process and curing agent technology, applied in antimonate/antimonite and other directions, can solve the problems of complex impurity removal process, high raw material cost, low product purity, etc., and achieve simple raw materials, low equipment requirements, and product purity. high effect

Inactive Publication Date: 2021-02-23
如皋市丹凤纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of raw materials in this application is high, and the impurity removal process in the later stage is complicated, requiring 6-12 recrystallizations, and the purity of the product is low

Method used

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  • Production process of curing agent for yarn impregnation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Shown a kind of production process of curing agent for yarn dipping, the specific production process is as follows:

[0026] S1: Preparation of sodium pyroantimonate: Add sodium hydroxide and water to the reaction kettle, then add antimony trioxide, and react at a constant temperature of 80-120°C for 2 hours; cool down to 30-50°C, and inject ozone while stirring to carry out Oxidation reaction for 5 hours; then heat up to 100°C, stand for crystallization, centrifuge, and dry to obtain sodium pyroantimonate;

[0027] S2: Preparation of hexafluoroantimonic acid: at 60-120°C, mix antimony trioxide with acetic acid solution containing hydrogen fluoride, then add hydrogen peroxide dropwise at a rate of 5mL / min while stirring, and obtain hexafluoroantimony after the reaction is complete acid solution;

[0028] S3: Preparation of silver hexafluoroantimonate mother liquor: under the condition of 60-120°C, equimolar amounts of sodium pyroantimonate solid and s...

Embodiment 2

[0035] Such as figure 1 Shown a kind of production process of curing agent for yarn dipping, the specific production process is as follows:

[0036] S1: Preparation of sodium pyroantimonate: Add sodium hydroxide and water to the reaction kettle, then add antimony trioxide, and react at a constant temperature of 80-120°C for 3 hours; cool down to 50°C, and introduce ozone while stirring to carry out oxidation reaction 6 hours; then heat up to 100°C, stand for crystallization, centrifuge, and dry to obtain sodium pyroantimonate;

[0037] S2: Preparation of hexafluoroantimonic acid: at 60-120°C, mix antimony trioxide with acetic acid solution containing hydrogen fluoride, then add hydrogen peroxide dropwise at a rate of 15mL / min while stirring, and obtain hexafluoroantimony after the reaction is complete acid solution;

[0038] S3: Preparation of silver hexafluoroantimonate mother liquor: under the condition of 60-120°C, equimolar amounts of sodium pyroantimonate solid and silv...

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Abstract

The invention relates to a production process of a curing agent for yarn impregnation. The production process is characterized by specifically comprising the following steps: S1, preparing sodium pyroantimonate; S2, preparing hexafluoroantimonic acid; S3, preparing a silver hexafluoroantimonate mother solution; S4, concentrating, cooling and crystallizing the silver hexafluoroantimonate mother liquor; and S5, recrystallizing and purifying the crude silver hexafluoroantimonate crystal. Antimonous oxide is mixed with an acetic acid solution containing hydrogen fluoride, and compared with a method of mixing antimonous oxide with a hydrofluoric acid aqueous solution or anhydrous hydrofluoric acid, the process has the advantages of mild reaction conditions, simple and easily available raw materials, low equipment requirements, high hexafluoroantimonic acid generation rate, fewer impurities and higher silver hexafluoroantimonate product yield. Hexafluoroantimonic acid reacts with silver carbonate to generate the silver hexafluoroantimonate mother solution, and then silver hexafluoroantimonate is prepared from sodium pyroantimonate and silver carbonate in a hydrogen fluoride aqueous solution in one step. The method has the advantages of mild reaction conditions, low raw material price, small environmental pollution and high impurity removal rate, and the purity of the finally obtainedproduct is high and reaches 99% or above.

Description

technical field [0001] The invention relates to the technical field of yarn impregnation catalysts, in particular to a production process of a curing agent for yarn impregnation. Background technique [0002] Generally, the yarn needs to be impregnated before weaving into fabrics to improve the surface properties of the yarn. The dipping of the yarn makes the fiber monofilaments of the yarn bond together, which can increase the strength of the yarn; Therefore, the production of the sizing material for yarn dipping is very important, and the common sizing material for yarn dipping needs a cationic curing agent to catalyze the production of the sizing material. [0003] Patent application number CN201310577612.2 discloses a preparation method of silver hexafluoroantimonate. At a temperature of 303-373K, equimolar sodium pyroantimonate and silver nitrate are directly reacted in about 40% hydrofluoric acid solution for 1-6 hours , and then undergoing multiple recrystallization ...

Claims

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Application Information

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IPC IPC(8): C01G30/02
CPCC01G30/02
Inventor 吴训华
Owner 如皋市丹凤纺织有限公司
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