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| 專利名稱 | Process for preparing bis(3-t-butyl-4-hydroxyphenyl-2,4-di-t-butylphenyl)resorcinol diphosphate | | 專利證號 | US6124492A | | 國別 | 美國 | | 獲證日期 | 2000-09-26 | | 專利摘要 | The invention relates to a process for preparing bis(3-t-butyl-4-hydroxyphenyl-2,4-di-t-butylphenyl)resorcinol diphosphate, which has characteristics of high conversion and high selectivity, and which comprises of charging sequentially phenolic compounds, phosphoryl chloride, catalyst and organic base, heating the reaction mixture for carry out a three-stage esterification reaction and improving the purity of the product through molecular designing; dissolving the product in an organic solvent and removing residual hydrochloride salt with a small amount of ammonia gas, thereby achieving the object of purification without generation of waste water and waste product. | IPC國際分類號 | C07F000912 | C07F000914 |
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