CN104558240A - A process of extracting chitosan from shrimp shells - Google Patents

Abstract

The invention relates to a process of extracting chitosan from shrimp shells. The process is characterized by including: adding hydrochloric acid having a certain concentration to remove calcium carbonate of the shrimp shells, adding sodium hydroxide having a certain concentration to dissolve protein and fat in the shells, adding a potassium permanganate solution to dip the soft shells, rinsing the soft shells with a diluted acid, performing a second time of alkali boiling by using a diluted alkali, bleaching, rinsing and drying. The beneficial effects of the process are that: the process is simple, the prepared chitosan is free of impurities, and the utilization value of the shrimp shells is improved.

Description

One seed shrimp shell extracts chitosan technique

Technical field

The present invention relates to field of processing of aquatic products, be specifically related to a seed shrimp shell and extract chitosan technique.

Background technology

China's shrimp resources is very abundant, in the peeled shrimp course of processing, shrimp head, shrimp shell are because being rich in chitin, and mouthfeel is hard and become processing waste, only a small amount of for the preparation of chitin, extraction amino acid, extraction astaxanthin, the poly-polysaccharide of extraction chitin preparation etc., causing resource wastes greatly.Not perfect in shell extraction chitosan technology such as shrimp crabs at present, the impurity extracting chitosan is more.

Summary of the invention

The invention provides a seed shrimp shell for the problems referred to above and extract chitosan technique, improve the utility value of dried small shrimp.

The present invention realizes in the following manner:

One seed shrimp shell extracts chitosan technique, and it is characterized in that, its technical process is:

1. in shrimp shell, add concentration is that 6%-8% hydrochloric acid soln mixed immersion thoroughly after 24 hours, and the calcium carbonate in crust generates calcium chloride stripping, is pulled out by soft shell, fully rinses to neutrality with clear water;

2. in soft shell, add concentration is that 8%-10% sodium hydroxide solution boils, and protein and fat are decomposed completely, pulls out and rinses with water, extremely without alkali reaction;

3. 0.5%-1% potassium permanganate solution dipping soft shell is used, oxidation removing pigment impurity;

4. use diluted acid rinsing soft shell, then carry out second time soda boiling with diluted alkaline, also can play the effect of bleaching;

5. flooded by chitin 40% sodium hydroxide solution, be incubated 50-60 DEG C, after 24 hours, pressure removes steeping fluid, cleans 1 time, then is washed to alkali-free, dry and obtain chitosan in 30 DEG C of warm water.

Beneficial effect of the present invention: complete processing is simple, obtained chitosan is free from foreign meter, improves the utility value of dried small shrimp.

Embodiment

In shrimp shell, add concentration is that 6%-8% hydrochloric acid soln mixed immersion thoroughly after 24 hours, and the calcium carbonate in crust generates calcium chloride stripping, is pulled out by soft shell, fully rinses to neutrality with clear water; In soft shell, add concentration is that 8%-10% sodium hydroxide solution boils, and protein and fat are decomposed completely, pulls out and rinses with water, extremely without alkali reaction; With 0.5%-1% potassium permanganate solution dipping soft shell, oxidation removing pigment impurity; With diluted acid rinsing soft shell, then carry out second time soda boiling with diluted alkaline, also can play the effect of bleaching; Flooded by chitin 40% sodium hydroxide solution, be incubated 50-60 DEG C, after 24 hours, pressure removes steeping fluid, cleans 1 time, then is washed to alkali-free, dry and obtain chitosan in 30 DEG C of warm water.

Claims (1)

1. a seed shrimp shell extracts chitosan technique, and it is characterized in that, its technical process is:

1. in shrimp shell, add concentration is that 6%-8% hydrochloric acid soln mixed immersion thoroughly after 24 hours, and the calcium carbonate in crust generates calcium chloride stripping, is pulled out by soft shell, fully rinses to neutrality with clear water;

2. in soft shell, add concentration is that 8%-10% sodium hydroxide solution boils, and protein and fat are decomposed completely, pulls out and rinses with water, extremely without alkali reaction;

3. 0.5%-1% potassium permanganate solution dipping soft shell is used, oxidation removing pigment impurity;

4. use diluted acid rinsing soft shell, then carry out second time soda boiling with diluted alkaline, also can play the effect of bleaching;

5. flooded by chitin 40% sodium hydroxide solution, be incubated 50-60 DEG C, after 24 hours, pressure removes steeping fluid, cleans 1 time, then is washed to alkali-free, dry and obtain chitosan in 30 DEG C of warm water.