Preparation method for microbial lipid-based polyhydric alcohol
A technology of microbial oils and polyalcohols, which is applied in the preparation of organic compounds, carboxylate salts, carboxylate esters, etc., can solve the problem of low epoxy value of epoxidized products, achieve low production costs, and overcome production cycles Long-term, good economic benefits
Inactive Publication Date: 2015-06-24
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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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 pr
Method used
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Embodiment 1
[0024] Preparation of a microbial oil-based polyol product, take 10g epoxy microbial oil (epoxy value 3.0); methanol 1g; catalyst concentrated sulfuric acid 0.01g; add in the reactor, heat in a water bath, heat up to 40°C, and react for 1 hour The reaction is terminated with sodium carbonate solution, and the obtained crude product is washed with hot water to make the solution neutral; the washed product is distilled and dehydrated under reduced pressure to obtain microbial oil-based polyols.
Embodiment 2
[0026] Referring to Example 1, the differences are: methanol 6g, catalyst fluoroboric acid 0.04g; reaction temperature 60°C; reaction time 2 hours.
Embodiment 3
[0028] Referring to Example 1, the differences are: 12 g of ethanol, 0.05 g of concentrated nitric acid as a catalyst; a reaction temperature of 65° C.; and a reaction time of 4 hours.
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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 ...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C07C51/367C07C59/105C07C67/31C07C69/675C08G18/36C08G101/00
CPCC07C51/367C07C67/31C08G18/36C08G2110/0008C08G2110/0025C07C59/125C07C69/708
Inventor 陈新德杨丹张海荣黄超熊莲施丝兰
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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