Lithium alginate production process

A lithium alginate and production process technology, applied in the field of lithium alginate production process, can solve problems such as inability to granulate, achieve uniform finished products, simple process, and facilitate subsequent crushing work

Inactive Publication Date: 2016-07-13
青岛海之林生物科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts the granulation technology of the plunger extruder, which solves the disadvantage that the traditional granulator cannot granulate, and facilitates the subsequent crushing of lithium alginate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Soak non-deteriorated kelp for 2 hours, chop, wash, fix color, digest with 12% soda ash for 6 hours, coarsely filter, foam, float, filter, dilute, calcify, acidify and decalcify, wash, squeeze and dehydrate, and pulverize to obtain alginic acid. Take 100kg of alginic acid and a compound lithium salt with 7% weight of alginic acid, put it into a solid-phase neutralization tank, and react for 50 minutes. During production, use a universal indicator to detect every 10 minutes, and judge the reaction end point according to the color displayed by the indicator. The fully reacted material is centrifuged, extruded, dried, and crushed into a 40-mesh material. The 1% glue viscosity of the crushed material is 100 mPa.s, the pH value is 6.0, the moisture content is 15.0%, and the ash content is 14%.

Embodiment 2

[0027] Soak non-deteriorated kelp for 2 hours, chop, wash, fix color, digest with 12% soda ash for 6 hours, coarsely filter, foam, float, filter, dilute, calcify, acidify and decalcify, wash, squeeze and dehydrate, and pulverize to obtain alginic acid. Take 100kg of alginic acid and 15% alginic acid weight compound lithium salt, put it into a solid phase neutralization tank, react for 75 minutes, use a universal indicator to detect every 10 minutes during production, and judge the reaction end point according to the color displayed by the indicator. The fully reacted material is centrifuged, extruded, dried, and crushed into a 220-mesh material. The 1% glue viscosity of the crushed material is 2000mPa.s, the pH value is 8.0, the moisture content is 12.9%, and the ash content is 28%.

Embodiment 3

[0029] Soak non-deteriorated kelp for 2 hours, chop, wash, fix color, digest with 12% soda ash for 6 hours, coarsely filter, foam, float, filter, dilute, calcify, acidify and decalcify, wash, squeeze and dehydrate, and pulverize to obtain alginic acid. Take 100kg of alginic acid and put it into a neutralization tank that has previously added 60% vol and 10% of alginic acid weight compound lithium salt, react for 60 minutes, and use a universal indicator to detect every 10 minutes during production. According to the color displayed by the indicator, Determine the end point of the reaction. The fully reacted material is centrifuged, extruded, dried, and crushed into a 320-mesh material. The 1% glue viscosity of the crushed material is 980 mPa.s, the pH value is 6.9, the moisture content is 13.1%, and the ash content is 21%.

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Abstract

The invention provides a lithium alginate production process.The lithium alginate production process includes steps: (1) performing alkali digestion of brown algae to prepare alginic acid; (2) adding the alginic acid and a certain quantity of a composite lithium salt into a neutralization reactor to react for 50-70min until the alginic acid and the composite lithium salts are completely neutralized to form lithium alginate, wherein neutralization reaction includes solid-phase neutralization reaction and liquid-phase neutralization reaction with ethyl alcohol serving as a medium; consumption of the composite lithium salt is 7-15% of that of the alginic acid; the composite lithium salt is composed of lithium carbonate and lithium acetate, and a ratio of the lithium carbonate to the lithium acetate is 80-90:10-20; (3) performing centrifuging, plunger extruding granulation, drying and grinding to obtain lithium alginate in required meshes.The lithium alginate prepared according to the process is 100-2000mPa.s in viscosity, 40-320 in mesh number, 6.0-8.0 in pH value, smaller than or equal to 15.0% in moisture content and 14-28% in ash content.In addition, the lithium alginate production process can be implemented under the condition of existing sodium alginate solid-phase and liquid-phase neutralization production technology.

Description

technical field [0001] The invention relates to a production process of lithium alginate. Background technique [0002] Lithium alginate is a natural polysaccharide extracted from seaweed. Common alginate products on the market include monovalent alkali metal salts of alginic acid such as water-soluble sodium alginate, potassium alginate and lithium alginate, and divalent metal salts of alginic acid such as water-insoluble calcium alginate (except magnesium and mercury). There are many manufacturers of the above-mentioned common alginates with complete product specifications and extensive application development. Lithium alginate is a new type of alginate, and the characteristics of the product are quite different from other well-known alginate products. Lithium alginate is widely used as a medical excipient abroad, and it has a positive effect on mental illnesses such as mania and depression. In recent years, due to the high price of foreign alginate products, many fore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04
CPCC08B37/0084
Inventor 陈宏时慧刘晶营
Owner 青岛海之林生物科技开发有限公司
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