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Clean preparation process of chitin

A clean production and chitin technology, applied in the chemical industry, can solve the problems of unbearable enterprises, high one-time investment and operating costs, and large quantities, and achieve the effect of reducing energy consumption, alkali consumption and alkali cooking and washing wastewater.

Inactive Publication Date: 2005-08-17
徐君义 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, Zhoushan, Qingdao and other places have also implemented a number of chitin production wastewater treatment projects, but the treatment effect is not very satisfactory
[0006] Because chitin production wastewater is rich in organic matter and inorganic matter, with complex composition, high COD value and high chloride root content, conventional methods such as biochemical methods cannot be used for treatment, and terminal treatment based on physical and chemical treatment is adopted to concentrate all pollutants In the tail processing, the quantity is large, the load is heavy, and the resources and energy cannot be utilized to the maximum extent, and the investment and operation costs are high, which makes the enterprise unaffordable

Method used

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  • Clean preparation process of chitin

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Experimental program
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Effect test

Embodiment 1

[0036] First, put the collected animal shell waste materials such as shrimp and crab shells in a large-capacity plastic bucket, add 8% sodium hydroxide lye to soak for 70 hours, and then squeeze; reuse most of the squeezed liquid, Other liquids and shells are put into the soda boiling pool.

[0037] Then, prepare 2.2 tons of 15% sodium hydroxide alkali boiling liquid, and treat the casing with 130° C. steam for 0.5 hour. After cooking, drain for 10 minutes. After adding an appropriate amount of sodium hydroxide to the original alkali boiling liquid, carry out the second and subsequent alkali boiling. Each ton of chitin needs to be boiled in 6-9 ponds.

[0038] Then, the shells are put into the pool in stages and rinsed with the shell washing water after acid leaching. After washing 2 to 3 batches of casings, the washing water is discharged to the comprehensive sewage tank. The shells were centrifuged and dried in the sun.

[0039] When washing with water, the weight ratio...

Embodiment 2

[0044] First, put the collected animal shell waste materials such as shrimp and crab shells in a large-capacity plastic bucket, add 15% sodium hydroxide lye to soak for 24 hours, and then squeeze; reuse most of the squeezed liquid, Other liquids and shells are put into the soda boiling pool.

[0045] Then, prepare 2.5 tons of 9% sodium hydroxide alkali boiling liquid, and treat the shell with 120° C. steam for 1 hour. After cooking, drain for 10 minutes. After adding an appropriate amount of sodium hydroxide to the original alkali boiling liquid, carry out the second and subsequent alkali boiling. Each ton of chitin needs to be boiled in 6-9 ponds.

[0046] Then, put the shells into the sink in batches and rinse with clean water. After washing 2 to 3 batches of casings, the washing water is discharged to the comprehensive sewage tank. Centrifuge the shells and spin dry.

[0047] When washing with water, the weight ratio of shell to water is about 1:1.5 when washing for th...

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Abstract

The present invention provides clean chitin producing technological process and belongs to the field of chemical technology. The clean chitin producing process includes the steps of material pre-treatment, alkali boiling, water washing, acid soaking, and water washing to obtain product. Compared with available technology, the present invention has the comprehensive treatment of effluent, less waste exhaust, and less environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a production process of chitin. Background technique [0002] Chitin is a natural polymer isolated from the shells of shrimps and crabs. Due to the non-toxic, good biocompatibility, biodegradability and good film-forming properties of this biological material, it has been widely used in wastewater treatment, food industry, textile, chemical industry, daily chemicals, agriculture, bioengineering and medicine. Wider range of applications. However, at present, the preparation of chitin is made of crustacean waste produced during the processing of aquatic food processing enterprises. During the process of collecting and transporting raw materials, the stench caused by the decay of crustacean waste is so strong that it seriously affects the environment. Raw materials are prepared at the destination during the production of chitin, which will produce a high-concentration an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08
Inventor 周湘池徐君义林荣业
Owner 徐君义