A method for preparing lactic acid by using modified red mud to catalyze biomass raw materials

Abstract

The invention relates to the technical field of lactic acid preparation, in particular to a method for preparing lactic acid by catalyzing a biomass raw material by utilizing modified red mud. According to the method, the biomass raw material is catalyzed and degraded by adopting the modified red mud, thereby expanding the biomass raw material scope and effectively reducing the raw material cost of the lactic acid preparation; the adopted modified red mud is prepared by modifying waste red mud which is generated during an industrial production process of alumina, thereby achieving effective waste recycling and reducing the lactic acid preparation cost; and the period within which lactic acid is prepared through catalysis and degradation by adopting the modified red mud is greatly shortened, that is, the lactic acid preparation can be finished within 300 min.

Description

technical field [0001] The invention relates to the technical field of lactic acid preparation, in particular to a method for preparing lactic acid by using modified red mud to catalyze biomass raw materials. Background technique [0002] Lactic acid is an organic acid with a wide range of uses, and has been widely used in the fields of food, pharmaceuticals, feed, pesticides, daily chemicals, leather and textiles. It is easy to convert chemically into lactic acid ester, pyruvic acid, acrylic acid, propylene glycol and other fragrance chemicals. It is one of the important raw materials for fragrance preparation, especially lactic acid can be used to prepare biodegradable polylactic acid polymer materials. [0003] At present, the industrial production method of lactic acid is mainly prepared by biological fermentation. Biofermentation is to use starch-containing biomass, such as corn, as raw material, which is fermented and degraded into lactic acid under the action of lacti...

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology for preparing lactic acid by chemical catalysis has not been industrialized. The main reason is that the cost of the catalyst used is high, and it is easy to pollute the environment, and even the efficiency in the catalytic fermentation process is low, and the Most of them are soluble salts, which are not only expensive, but also have strong toxicity and are difficult to separate from the product, resulting in poor quality of lactic acid during the chemical catalytic preparation of lactic acid, and will also bring serious pollution to the environment

[0005] In addition, in the prior art, there is no report on the use of Bayer process red mud as a catalyst in the chemical catalytic preparation of lactic acid; although in the prior art, there is a modification treatment plan for Bayer process red mud, but The Bayer red mud modification scheme is mainly used in the treatment of sewage and other wastes, or as a filler in the cement preparation process, or in the preparation of nickel-containing catalysts that can treat sewage and other wastes, etc.

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