Method for preparing industrial gelatin and industrial protein powder by using waste leftover materials of leather
A technology for industrial gelatin and scraps, which is applied in the preparation methods of peptides, chemical instruments and methods, preparation of animal glue or gelatin, etc., can solve problems such as hidden safety hazards, environmental pollution, and ineffective disposal of leather scraps, etc. The effect of disposal costs, reducing environmental pollution and increasing annual consumption
Pending Publication Date: 2019-05-24
张昭
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[0003] The purpose of the present invention is to provide a method for preparing industrial gelatin and industrial protein powder by using waste leather leftovers, aiming to solve the above-mentioned prior art that leather leftovers cannot be effectively disposed of with garbage removal, and there are environmental pollution and potential safety hazards question
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[0028] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] A method for preparing industrial gelatin and industrial protein powder by using leather waste leftovers, comprising the steps of:
[0030] A. Alkali soaking and alkaline washing: put the leather leftovers into the lye soaking pool, the pH of the lye in the lye soaking pool is 10-12, and the soaking time is 4h±20min, so that the heavy metal chromium in the leather leftovers is formed under alkaline conditions Chromium hydroxide precipitates. Al...
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The invention discloses a method for preparing industrial gelatin and industrial protein powder by using waste leftover materials of leather, and belongs to the technical field of leather waste recycling. The method comprises the following steps of alkali soaking and cleaning-pickling-water washing-extracting, the leather leftover materials are soaked in alkali to form chromium hydroxide flocculent precipitate by most chromium and hydroxide radical ions in the leather leftover materials, wherein the removal rate reaches more than 98%; the residual heavy metal chromium in the leather leftover materials can be removed by acid washing to generate soluble chromium sulfate salt; water washing is carried out to remove a small amount of impurities remaining in the inner layer of the skin and opena skin fiber interstitial channel, and the water washing is carried out until the pH value is neutral; in the extraction process, the upper layer glue solution is concentrated and used for preparingindustrial gelatin, and the residual precipitate is subjected to secondary extraction and is concentrated and used for preparing industrial protein powder. According to the invention, the leather leftover materials can be effectively treated, the environmental pollution and the treatment cost are reduced, industrial products are formed, the economic benefits are generated, and the economic and social benefits caused by changing waste into valuable are achieved.
Description
technical field [0001] The invention belongs to the technical field of leather waste recycling, and in particular relates to a method for preparing industrial gelatin and industrial protein powder from leather waste leftovers. Background technique [0002] At present, many leather production, processing and recycling enterprises will produce a large amount of leather scraps in their production and operation process. The leather scraps produced are mainly wet blue leather, finished leather scraps, etc., and their main components are solidified denatured proteins containing heavy metal chromium , about 15% of the total scraps are used as raw materials for the production of recycled leather, and most of the rest are difficult to be used as raw materials for the production of recycled leather, so they have to be mixed with other industrial wastes for removal and treatment, and have not been effectively disposed of. Greater environmental pollution and potential safety hazards. ...
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IPC IPC(8): C09H1/04C09H3/02C09H9/04C07K1/30C07K1/34C07K1/36
Inventor 姜超王君林赵莎吴明超郭桂永赵阳殷建普王迎春
Owner 张昭
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