121627-17-6Relevant articles and documents
Preparation method of bidentate phosphite compound in microchannel reactor
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Paragraph 0035; 0040-0068, (2021/08/21)
The invention discloses a preparation method of a bidentate phosphite compound in a microchannel reactor, which is characterized by comprising the following steps of dissolving phosphorus trichloride in a solvent A to prepare a solution A, dissolving substituted diphenol I and an acid-binding agent in a solvent B to prepare a solution B, and enabling the two solutions to enter the microchannel reactor under the action of a feed pump to react to obtain a reaction solution A, dissolving substituted diphenol II and an acid-binding agent in a solvent C to prepare a solution C, enabling the solution C to enter the microchannel reactor under the action of a feeding pump to be mixed with the reaction liquid A for reaction, obtaining a crude product solution, and performing post-treatment and recrystallization to obtain the bidentate phosphite compound. No precipitate is generated in the whole reaction process, so that the method is more suitable for a micro-channel reaction technology, the problem of micro-channel blockage caused by generation of a large amount of precipitate is avoided, the whole reaction process can be more continuously and stably operated in the micro-channel reactor, and the service life of the micro-channel reactor is greatly prolonged.
Diphosphite synthesis method
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Paragraph 0018; 0019, (2016/11/21)
The invention discloses a diphosphite synthesis method. According to the diphosphite synthesis method, a tested dosage of phosphorus trichloride, 2,2'-diphenol and 3,3'-di-tert-butyl-5,5'-dimethoxy-2,2'-diphenol are used as raw materials, the phosphorus trichloride is dissolved in an organic solvent to prepare a solution, then the solution is added into a 2,2'-diphenol and organic alkali dissolved organic solution under stirring, and the reaction solution is continuously stirred for several hours after addition of the phosphorus trichloride solution is completed; a 3,3'-di-tert-butyl-5,5'-dimethoxy-2,2'-diphenol dissolved organic solution is added into the reaction solution, the reaction solution is continuously stirred for several hours after adding is completed, then heating is performed to reach the temperature of 80-120 DEG C, and reflux is performed for several hours; the reaction liquid is cooled to reach room temperature after reaction is completed, filtration and filter cake washing are performed, filtrates are mixed and then are evaporated and concentrated to obtain solid, the solid is washed with acetonitrile, and recrystallization is performed to obtain a product. The diphosphite synthesis method has the advantages of being high in diphosphite yield, small in phosphorus trichloride usage amount, few in by-products, short in reaction time, simple in aftertreatment and the like.
METHOD FOR THE PURIFICATION OF BIPHEPHOS
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Paragraph 0027, (2013/12/04)
The invention relates to a process for the purification of 6,6′-[(3,3′-di-tert-butyl-5,5′-dimethoxy-1,1′-biphenyl-2,2′diyl)bis(oxy)]bis(dibenzo[d,f][1,3,2]dioxaphosphepin), abbreviation: biphephos (see formula 1).