Preparation process of trans-9,10-epoxystearic acid methyl ester
A technology for epoxy fatty acid methyl ester and fatty acid methyl ester, which is applied in the technical field of preparing epoxy fatty acid methyl ester by a two-stage method, can solve the problem that epoxy products have high acid value and iodine value, do not meet the acid value, iodine value, and are inconsistent with Economic and environmental protection problems, to achieve the effect of reducing the probability of saponification, low price, and high efficiency of alkali refining
Active Publication Date: 2017-05-31
BEIJING HAOYE TONGYU TECH
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Problems solved by technology
After testing by professional technicians, the acid value and iodine value of epoxy products obtained by the above-mentioned several processes are relatively high, which does not meet the requirements of acid value and iodine value stipulated in the HG / T-4390-2012 standard
Moreover, the alkali washing process is easy to saponify, and a large amount of water is required for washing, which is not economical and environmentally friendly; in addition, the epoxy fatty acid methyl ester will retain the color of the fatty acid methyl ester itself, and a decolorization process is required to obtain a product with qualified chroma
Method used
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[0049] The preparation technology of epoxy fatty acid methyl ester of the present invention comprises the following steps:
[0050] (a) Preparation of fatty acid methyl esters
[0051] Add 40kg of waste oil separated from the food waste treatment process, which has been removed and dehydrated, into the enamel reaction kettle, and then add anhydrous methanol accounting for 20% of the mass of waste oil and hydrogen accounting for 0.7% of the mass of waste oil. Sodium oxide, stirred at 65°C for 60 minutes, reacted to generate crude fatty acid methyl ester and glycerin; after stopping the stirring, let it stand for stratification for 30 minutes, the liquid in the reaction kettle was divided into upper and lower layers, and the upper layer was crude fatty acid methyl ester, The lower layer is glycerin. After the glycerol in the lower layer is discharged, the crude fatty acid methyl ester is acid-washed once with acetic acid solution with a volume ratio of 0.25%, and then washed twi...
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The invention relates to a preparation process of trans-9,10-epoxystearic acid methyl ester, comprising the steps of preparing fatty acid methyl ester, carrying out first-stage epoxidation, carrying out second-stage epoxidation, washing with water, refining with alkali, and washing and distilling; fatty acid methyl ester prepared with waste oil isolated in the treatment process of kitchen waste is used as a raw material, hydrogen peroxide is used as an oxygen donor, formic acid is used as a carrier, an inorganic medium-strength acid is not used as a catalyst, trans-9,10-epoxystearic acid methyl ester meeting HG / T-4390-2012 standard is prepared via double epoxidation, alkali refining and deacidifying, and acid value and COD (chemical oxygen demand) value of emitted wastewater are lowered; the preparation process of the trans-9,10-epoxystearic acid methyl ester has the advantages of good equipment simplicity, low cost, high alkali refining efficiency, low saponifying rate and the like.
Description
technical field [0001] The invention relates to a preparation process of epoxy fatty acid methyl ester, in particular to a two-stage method for preparing epoxy fatty acid methyl ester. Background technique [0002] With the mass production and wide application of plastic products, various additives have also emerged, and the amount of plasticizer is the largest among all kinds of additives. Plasticizer, also known as plasticizer, is a polymer material additive widely used in industry. Adding this substance in plastic processing can enhance its flexibility. At present, the plasticizers on the market mainly include DEHP, DIDP, DNOP, DINP, BBP, DBP and other o-benzene substances. Because this type of plasticizer contains benzene, long-term exposure will pose a threat to health. The EU REACH regulations strictly restrict this The use of similar plasticizers, so safe and environmentally friendly plasticizers are urgently needed in the market. Epoxy fatty acid methyl ester is a ...
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IPC IPC(8): C07D301/16C07D301/32C07D303/42
CPCC07D301/16C07D301/32C07D303/42
Inventor 田丹于景成靳国良王艳萍韩光光辛凯郭莹赵海兵丁雪梅靳艳祺
Owner BEIJING HAOYE TONGYU TECH