Technology for producing leather gelatin with high freezing force and high viscosity by alkali-alkali-acid ternary method

A high-viscosity, skin-based gelatin technology, which is applied in the production of high-freezing force and high-viscosity skinned gelatin technology, can solve the problems of non-recyclable degreasing aqueous solution, high freezing force and viscosity, and environmental pollution, so as to shorten the processing time and save energy. , the effect of improving production efficiency

Active Publication Date: 2013-03-27
罗赛洛(温州)明胶有限公司
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AI Technical Summary

Problems solved by technology

This method is to use the binary method to make glue. The disadvantage is that the leather is degreased by water, which requires a lot of water. The degreased aqueous solution cannot be recycled and reused, and it will cause environmental pollution when it is discharged. The finished product has not the highest freezing power and viscosity.

Method used

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Embodiment Construction

[0022] The invention greatly improves the pretreatment process of the gelatin production process, making the pretreatment process a mixed alkali-acid treatment process. Not only the freezing power of the product is high, reaching the level of the acid method, but also the viscosity is between the acid method and the alkali method, which is obviously higher than that of the acid method. It also greatly shortens the leather processing time compared with the alkaline method, shortening 35-40 days. The specific steps are as follows: Treat the collected cowhide or pigskin leather with sodium sulfide plus lime or sodium hydroxide, the concentration of sodium sulfide is 0.2-1%, and the concentration of calcium oxide is 0.5-2%, and then cut the leather. Skin, cut into 15×15 cm pieces of skin; then wash with water for about 2-3 hours to remove impurities, dirt and salt; add water, raise or lower the temperature to bring the leather to 15-25oC, add sodium hydroxide, Control the concent...

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Abstract

The invention relates to making technology of gelatin, in particular to a technology for producing leather gelatin with high freezing force and high viscosity by an alkali-alkali-acid ternary method. The technology includes pretreatment process, gelatin extraction, filtration, ion exchange, concentration, high temperature sterilization, drying, crushing, mixing and metal detection, thus obtaining the finished product. The technology is characterized in that the pretreatment process is a mixed acid-alkali method and forms the alkali-alkali-acid ternary method for producing leather gelatin with high freezing force and high viscosity, together with the follow-up process. The product is high in freezing force, and achieves acid-method level, as well as the viscosity between the acid method and the alkali method, obviously higher than alkali method. Compared with the alkali method, the technology has the treatment time of leather shortened greatly by 35-40 days. The acid (pH ranging between 3.0-4.5) gelatin extraction only needs to be done for 5 times, reduced by twice compared with 7 times of the alkali method. The production efficiency is improved by 20%, and water and energy are saved by 10%. The temperature for alkali treatment is controlled between 15-25oC, product quality is ensured and meanwhile, compared with former requirement of 5-15oC, a large quantity of energy is saved.

Description

technical field [0001] The invention relates to a production method of gelatin, in particular to a process for producing gelatin with high freezing force and high viscosity by using an alkali-alkali-acid ternary method. Background technique [0002] Gelatin is a polymer of high-molecular polypeptides obtained from collagen contained in animal skin, bone, cartilage, ligament, sarcolemma, etc., after purification and primary hydrolysis. In addition to a small amount of water and inorganic salts, gelatin products contain more than 82% protein, no fat, no cholesterol, and contain 18 kinds of amino acids, 7 of which are necessary for the human body. Gelatin is widely used in food additives and capsules of pharmaceutical pills in civilian use; in industry, gelatin is also used in photographic film, X-ray film, aviation film and wood-based panel gluing, belt adhesives, rubber products, cotton cloth and papermaking, etc. Indispensable raw material. [0003] There are basically fou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09H3/00
Inventor 蔡礼昊
Owner 罗赛洛(温州)明胶有限公司
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