Baking-free preparation method of compounding food additive lactic acid powder through extruding and mixing of twin screw extruder

Abstract

The invention relates to a baking-free preparation method of compounding food additive lactic acid powder (solid lactic acid) through extruding and mixing of a twin screw extruder. The method comprises the following steps of adding calcium lactate solid and lactic acid liquid in a twin screw extruder from different feed openings, under the effect of a screw unit assembly specially designed in theextruder, enabling the calcium lactate solid and lactic acid liquid to be in sufficient contact, mixed and transported forwards, and through working procedures of performing vacuum air extraction, performing dehydration, performing pelleting, performing airing (cooling), performing standing, performing crystallization and rearrangement, performing crushing and sieving, adding an anticaking agent,performing mixing and the like, compounding food additive lactic acid powder (solid lactic acid) products are finally made. According to the lactic acid powder obtained by the method disclosed by theinvention, the content of lactic acid of unit mass is high, much non-lactic acid foreign matter is introduced, the compounding food additive lactic acid powder (solid lactic acid) easily dissolves inwater, lactic acid substances are positioned in a molecule dissociating state, and unique and harmonious flavor of raw material products can be reflected and expressed in the application effect evaluation of goal products.

Description

technical field [0001] The invention relates to the technical field of food additives, in particular to a method for preparing compound food additive lactic acid powder (solid lactic acid) by twin-screw extrusion and mixing without drying. Background technique [0002] Food additives are the foundation of the modern food industry and have been widely recognized by the public. The promotion of compound food additives is based on the successful application of food additives in the past, through the coordinated effect of formula products or targeted dosage form changes, to further increase the application range of products, improve efficacy, and reduce the total amount of additions. It is a favorable link for use Achievement of science, safety, cost reduction and efficiency increase. According to the definition of GB26687-2011 "National Food Safety Standards General Rules for Compound Food Additives" issued by the Ministry of Health on July 6, 2011, compound food additives are...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above various problems and deficiencies in the production of lactic acid powder by the existing microcapsule embedding method and mixing and drying method, and to provide a compound food additive lactic acid that uses twin-screw extrusion to mix and avoid drying. powder production method

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