CN1017210B

CN1017210B - Heated basic hydrolysis process for producing cottonseed protein

Info

Publication number: CN1017210B
Application number: CN87104102A
Authority: CN
Inventors: 韩关佑; 盛春奎; 施亚夫
Original assignee: XIAOSHAN PLANT PROTEIN FACTORY
Current assignee: XIAOSHAN PLANT PROTEIN FACTORY
Priority date: 1987-06-06
Filing date: 1987-06-06
Publication date: 1992-07-01
Also published as: CN87104102A

Abstract

The present invention relates to a method for preparing cottonseed protein from cotton cakes, which has the technical scheme that cotton cakes are crushed into fine powder, water is added to the fine powder, and sizing material is formed by stirring, and lime milk is added; the pH value is regulated to 10 to 14, the material is heated to 90 to 150 DEG C, and the temperature is kept for 1 to 12 hours; alkali heat hydrolyzation reaction is carried out; reaction products are filtered, the filter liquor is concentrated and is decolored, or the filter liquor is decolored and is concentrated; the filter liquor is dried by high-pressure spraying, and the cottonseed protein powder is produced. The cottonseed protein powder contains 45 to 55% of protein and less than 0.055% of gossypol; the cottonseed protein powder can be used as an additive agent in food industry, and dregs can be used as fertilizers or fuel; the present invention provides a new path for comprehensive utilization of cotton cakes and development of food industry.

Description

Heated basic hydrolysis process for producing cottonseed protein

The preparation method of the relevant vegetable protein of the present invention is especially with to produce cottonseed protein from cottonseed cake relevant.Cottonseed cake contains the about 30-40% of albumen, it is a kind of important protein resource, but because of containing the gossypol toxin, so cottonseed cake only is used as the feed of fertilizer or ruminant for a long time, for edible cottonseed protein is provided, the content of gossypol in the cottonseed cake must be reduced to set quota, existing useful chemical substance of technology of removing gossypol such as ferrous sulfate, urea, soda ash are with the structure of destroying gossypol or have form, need consume more expensive chemical substance than complex apparatus.

The purpose of this invention is to provide a kind of new technology of removing gossypol from cottonseed cake, make technological process and equipment needed thereby comparatively simple, the effect of removing gossypol is comparatively remarkable, for new approach is opened up in the comprehensive utilization of cottonseed cake and the development of food industry.

Realization of the present invention is heated basic hydrolysis process, and cottonseed cake is broken into fine powder, adds a certain amount of water and stirs into slurry, through chemical treatment, product is filtered concentrating filter liquor, decolouring, or,, make cottonseed flour again through high-pressure spray-drying through decolouring, concentrated, said chemical treatment is to add milk of lime in said slurry, regulates the pH value to 10-14, be heated to 90-150 ℃, be incubated 12-1 hour, carry out the alkaline thermal hydrolysis reaction, impel the gossypol oxidation Decomposition.Used decolorizer is a hydrogen peroxide.

Technological process of the present invention and equipment needed thereby are comparatively simple; protein content in the cottonseed flour that makes is 45-55%; the content of free gossypol is reduced to below 0.055%; product; leftover bits and pieces is that filter residue can be made fertilizer or fuel; there are not the three wastes; do not influence environmental protection; the cottonseed flour that makes can replace freshly-slaughtered poultry egg white or albumen to do as the food industry especially blowing agent of confectionery industry; the price of the one ton of egg white spirit in domestic market is about more than 20,000 yuan at present; and one ton of cottonseed flour is about 5,500 yuan, can improve about 14 times of the economic worth of cottonseed cake, and this is to reducing the food industry cost; improve agricultural byproducts value high economic benefit is arranged.One ton of cottonseed flour can replace the purposes of 16 tons of fresh hen eggs, and the influence of the seasonal variations of not laid eggs, and this is supplied with the good social benefit to what relax the market fresh hen egg.

Embodiment

Cottonseed cake is ground into fine powder through pulverizer, pour in the mixer, the weight ratio of adding and cottonseed cake powder is 1: 4 a water, stir into slurry, add milk of lime again, regulate the pH value 12-13, stir, pour in the reaction pot of water vapour heating jacket and agitator, be heated to 95-105 ℃, be incubated 2.5-3 hour, carry out the alkaline thermal hydrolysis reaction, product is filtered, and filter residue is discharged separately, after filtrate concentrates in concentration pan, pour in the decolouring bucket, flavor is removed in the hydrogen peroxide decolouring that adds its weight 3%, again through high-pressure spray-drying, makes cottonseed flour.

In the cottonseed flour that makes, the content of albumen is 45-55%, and the content of free gossypol is reduced to below 0.055%, after tested, meets state health standards.Filter residue can be made fertilizer or fuel.

Claims

1, a kind of heated basic hydrolysis process of producing cottonseed protein is broken into fine powder with cottonseed cake, adds water and stirs into slurry, through chemical treatment, product is filtered concentrating filter liquor, decolouring, or,, make cottonseed flour again through high-pressure spray-drying through decolouring, concentrated, it is characterized in that said chemical treatment, be in said slurry, to add milk of lime, regulate the pH value, be heated to 90-150 ℃ to 10-14, be incubated 12-1 hour, carry out the alkaline thermal hydrolysis reaction.

2,, it is characterized in that used decolorizer is a hydrogen peroxide by the said heated basic hydrolysis process of producing cottonseed protein of claim 1.