Preparation method for microbial lipid-based polyhydric alcohol

Abstract

The invention discloses a preparation method for microbial lipid-based polyhydric alcohol. The method comprises the following steps of adding alcohol and an acidic catalyst into epoxidation microbial lipid, terminating reaction by use of a sodium carbonate solution after stirring reaction for 1-6 hours at a constant temperature of 40-90 DEG C, washing an obtained crude product with hot water so that the solution becomes neutral, and then performing reduced pressure distillation and dehydration on the product obtained through washing to obtain the target product. According to the method, the microbial lipid adopted by the method takes maize straws and rice straws as raw materials, and the production cost is low, so that large-scale industrial production is easily realized. The microbial lipid-based polyhydric alcohol prepared by the method is wide in hydroxyl value distribution, and not only can be used for preparing a flexible polyurethane foam material, but also can be used for preparing a rigid polyurethane foam material; the problems in the prior art that the production cycle of animal and vegetable lipid is long, the production is limited by weathers and climates, and additional cultivated land resources are occupied are solved, the problem of competing for grains with human beings is solved, and the method has good economic benefits and wide application prospect.

Description

Technical field: [0001] The invention relates to the field of biochemical technology, in particular to a method for preparing microbial oil-based polyols. Background technique: [0002] Polyurethane foam is a polymer material with repeating structural units of urethane chain segments made by the reaction of isocyanate and polyol. It is widely used in many fields with excellent physical and chemical properties; polyether polyol is It is prepared by polyaddition reaction between initiator and ethylene oxide, propylene oxide, butylene oxide, etc. in the presence of a catalyst. Among them, polyols and isocyanates are downstream products of non-renewable resources such as petroleum. With the depletion of petroleum resources and the constant changes in prices, the prices of corresponding polyether polyols and polyester polyols fluctuate greatly; in addition, with the increasing requirements for environmental protection, the exploration of their substitutes has become the current ...

AI Technical Summary

Problems solved by technology

Researchers from all walks of life pay more attention to the extraction of oil-producing microorganisms and microbial oils. For the application of microbial oils, due to the low iodine value of the currently prepared microbial oils, the epoxy value of the epoxidized products is low, so it is also It is limited to biodiesel, and there are few reports on the application research on chemical products, especially polyols

Images