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

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...

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.