- Preparation method of dialkylphosphinic acid
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The invention discloses a preparation method of dialkylphosphinic acid, which comprises the following steps: adding phosphorous acid into a reaction kettle, adding a catalyst, and carrying out pyrolysis at 170-190 DEG C to generate hydrogen phosphide; introducing the obtained hydrogen phosphide into a reaction kettle containing olefin, conducting heating and pressurizing in the presence of an initiator, and conducting reacting to obtain dialkylphosphine; and adding the obtained dialkylphosphine into a solvent, adding hydrogen peroxide while stirring, and conducting reacting to obtain the dialkylphosphinic acid. According to the preparation method of the dialkylphosphinic acid, high-purity phosphide hydrogen raw material gas is prepared by pyrolyzing phosphorous acid, free radical additionreaction is conducted on the phosphide hydrogen raw material gas and various olefins to prepare high-purity, high-grade and high-added-value dialkylphosphine, and subsequent controllable oxidation isconducted by taking the dialkylphosphine as a raw material to obtain the dialkylphosphinic acid. Various types of dialkylphosphinic acids are prepared, the operation steps are simple, and the operation conditions are mild.
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Paragraph 0025
(2021/01/15)
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- Reduction of phosphinites, phosphinates, and related species with DIBAL-H
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Diisobutylaluminium hydride has been found to be an excellent reducing agent for phosphinites, phosphinates, and chlorophosphines. By performing reductions in situ, direct synthesis of secondary phosphine boranes from Grignard reagents has been achieved without isolation or purification of any intermediates. Georg Thieme Verlag Stuttgart.
- Busacca, Carl A.,Bartholomeyzik, Teresa,Cheekoori, Sreedhar,Raju, Ravinder,Eriksson, Magnus,Kapadia, Suresh,Saha, Anjan,Zeng, Xingzhong,Senanayake, Chris H.
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experimental part
p. 287 - 291
(2009/07/01)
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