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Method of recovering gelatin from waste soft capsules and tailings

A technology of soft capsules and leftovers, applied in the preparation of animal glue or gelatin, etc., which can solve the problems of being unable to be directly used again, being contaminated with oil and grease, and reducing the quality of fresh glue, and meeting the requirements, convenient operation, and low cost. Effect

Inactive Publication Date: 2005-08-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gelatin used to prepare soft capsules should be mixed with glycerin and water, and it will also be contaminated with oils, drugs, etc., and cannot be used directly
At present, most manufacturers either add waste gelatin to fresh glue in a certain proportion, which reduces the quality of fresh glue; or add it to pigments for the preparation of low-grade capsules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Dissolve 200g of waste material in 1L of deionized water, heat the water bath at 70°C to form a colloidal solution, perform liquid separation while it is hot, and remove the lower layer of uniform colloidal solution; when the colloidal solution is slightly cooled to 30°C but not condensed, use an equal volume Wash and extract with petroleum ether and ethyl acetate to remove oils and medicines; adjust the pH value to 5.8 to make the colloid solution reach the isoelectric point, add 1 / 2 volume of edible alcohol to the total colloid solution to precipitate the protein, and filter Then vacuum dry. The total protein recovery rate is above 70%.

Embodiment 2

[0013] Dissolve 200g of waste material in 2L of deionized water, heat the water bath at 50°C to form a colloidal solution, perform liquid separation while it is hot, and remove the lower layer of uniform colloidal solution; when the colloidal solution is slightly cooled to 25°C but not condensed, use half volume Petroleum ether and ethyl acetate for washing and extraction to initially remove oils and medicines; adjust the pH value to 8 to make the colloid solution reach the isoelectric point, add 1 / 4 volume of edible alcohol to the total colloid solution to precipitate the protein, and filter Then vacuum dry. The total protein recovery rate is above 70%.

Embodiment 3

[0015] Dissolve 200g of waste material in 1L of deionized water, heat the water bath at 70°C to form a colloidal solution, perform liquid separation while it is hot, and remove the lower layer of uniform colloidal solution; when the colloidal solution is slightly cooled to 30°C but not condensed, use an equal volume Wash and extract with petroleum ether and dichloromethane to remove oils and medicines; adjust the pH value to 5.8 to make the colloid solution reach the isoelectric point, add 1 / 2 volume of edible alcohol to the total colloid solution to precipitate the protein, and filter Then vacuum dry. The total protein recovery rate is above 70%.

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PUM

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Abstract

The invention provides a process for reclaiming gelatine from waste capsule and leftover bits and pieces, which comprises the steps of, (1) dissolving the waste in 5-10 times volume of deionized water, the solution temperature being 50-90 deg. C, forming colloidal solution, filtering the homogeneous colloidal solution on the lower layer, (2) using 1 / 2-1 times volume of petroleum ether, acetic acid ethyl ester, normal butyl alcohol, methylene chloride as solvent for scouring, abstraction, (3) adjusting pH to 5.8-8, charging 1 / 4-1 times volume of edible alcohol, for protein coagulation, filtering and vacuum drying.

Description

technical field [0001] The invention relates to a method for recovering gelatin from waste soft capsules and leftovers. Background technique [0002] The production and use of gelatin has a long history, and its application has been widely used in photography, medicine, food, pesticides, cosmetics, polymer materials and other fields. In recent years, with the rapid development of medicine, cosmetics and food industries, gelatin capsules— —The new application field of gelatin has also been developed rapidly. Abroad, gelatin capsules are applied to applications in new fields almost every day. At present, the soft capsules of cosmetics are very popular in the market, which shows that the market prospect of soft capsules is very good. As far as the pharmaceutical industry is concerned, capsules are superior to other oral dosage forms because of their high bioavailability, accurate dosage, and timed release of drugs, and are widely used. Many drugs wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09H3/00
Inventor 何龙吕秀阳
Owner ZHEJIANG UNIV
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