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Chitin clean production process

A clean production and chitin technology, applied in the field of chitin clean production process, can solve the problems of resource waste and chitin production process pollution, and achieve the effects of reducing acid and alkali consumption, improving the factory environment, and avoiding air pollution

Inactive Publication Date: 2011-02-16
YANGZHOU RIXING BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a chitin clean production process in view of the problems of serious pollution and waste of resources in the current chitin production process

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] Add 1,000 kg of fresh crayfish shells to the texture extrusion device for texture extrusion pretreatment; add the texture extrusion pretreated crayfish shells to the texture extrusion pretreated crayfish shells with a weight ratio of 1 The concentration of :10 is 6wt% hydrochloric acid to carry out circulation immersion (replenish acid according to consumption in the circulation immersion process, make the hydrochloric acid concentration that is used for immersion remain on 6wt%), immersion time is 12h. During the dynamic cycle pickling process, the acid solution is recycled up to 6 times, so that the calcium content in the wastewater tends to be saturated; the wastewater is added with sulfuric acid, filtered to obtain calcium sulfate, and the acidic wastewater is recycled to prepare the acid solution for cyclic soaking. The crayfish shells soaked in acid are washed with water (preferably until neutral).

[0030] The crayfish shells after the pickling treatment and clea...

Embodiment 2

[0035] Add 1,000 kg of fresh crab shells to the texture extrusion device for texture extrusion pretreatment; add the texture extrusion pretreated crab shells to the texture extrusion pretreated crab shells with a weight ratio of 1:8 Hydrochloric acid with a concentration of 8wt% was used for cyclic immersion (acid replenishment was performed according to consumption during cyclic immersion, so that the concentration of hydrochloric acid used for immersion was maintained at 8wt%), and the immersion time was 15 hours. During the dynamic cycle pickling process, the acid solution is recycled up to 5 times, so that the calcium content in the wastewater tends to be saturated; the wastewater is added with sulfuric acid, filtered to obtain calcium sulfate, and the acidic wastewater is recycled to prepare the acid solution for cyclic soaking. The crab shell after acid soaking is washed with water (preferably washed to neutrality).

[0036] The crab shells after pickling treatment and c...

Embodiment 3

[0041] Add 1,000 kg of fresh Rochester shrimp shells to the texture extrusion device for texture extrusion pretreatment; add the texture extrusion pretreated Roche shrimp shells to the texture extrusion pretreated Roche shrimp shells with a weight ratio of 1 The concentration of : 12 is that the hydrochloric acid of 5wt% carries out cyclic soaking (replenishes acid according to consumption in the cyclic soaking process, makes the concentration of hydrochloric acid used for soaking remain on 5wt%), soaking time is 10h. During the dynamic cycle pickling process, the acid solution is recycled up to 8 times, so that the calcium content in the wastewater tends to be saturated; the wastewater is added with sulfuric acid, filtered to obtain calcium sulfate, and the acidic wastewater is recycled to prepare the acid solution for cyclic soaking. The Roche shrimp shells soaked in acid are washed with water (preferably until neutral).

[0042] The Roche shrimp shells after the pickling tr...

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Abstract

The invention belongs to the field of processing of chitin and discloses a chitin clean production process. The process comprises the steps of taking fresh shrimp and crab shells as raw materials, carrying out texture extrusion pretreatment, dynamic cyclic pickling, closed alkali boiling and washing, drying, and obtaining a chitin finished product. The process adjusts and improves the production process flow of the chitin and can carry out comprehensive utilization and treatment on the shrimp and crab shells, reduce the consumption of acid and alkali, recover calcium sulfate, proteins and other useful materials, recycle washing water, solve the problems of serious pollution and waste of resources of the conventional process and have obvious environmental and economic benefits.

Description

technical field [0001] The invention belongs to the field of chitin processing and relates to a chitin clean production process. Background technique [0002] Chitin, also known as chitin and chitin, is another important natural polymer polysaccharide besides cellulose. It is estimated that in nature, the annual biosynthesis of chitin is more than 10 billion tons, and chitin has great development and utilization value and broad development prospects. However, most of the current chitin production processes and equipment are not enough to be systematically matched, and the production process has not yet achieved comprehensive recycling. The traditional process generally uses hydrochloric acid solution to dissolve calcium, phosphorus and other minerals in crustacean shells such as shrimp and crab shells, and rinses with water until neutral; then uses sodium hydroxide solution to hydrolyze the protein and other components in and on the shell, and rinses with water to neutral,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08
Inventor 张超孙达峰张卫明戚善龙张和
Owner YANGZHOU RIXING BIO TECH
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