2767-80-8Relevant articles and documents
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Rathke,J.W. et al.
, p. 2310 - 2313 (1970)
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Hydrophosphination of Formaldehyde catalysed by Tris(hydroxymethyl)phosphine Complexes of Platinum, Palladium or Nickel
Hoye, Peter A. T.,Pringle, Paul G.,Smith, Martin B.,Worboys, Kerry
, p. 269 - 274 (1993)
The addition of PH3 to formaldehyde to give P(CH2OH)3 is catalysed by a range of platinum-(IV), -(II) and -(0) compounds including Na2, K2, 2> 2 and 4>*H2O 3.A large ratio of P(CH2OH)3 to Pt is present under the conditions in which the catalysis is operated and the hypothesis that a common platinum-P(CH2OH)3 complex is present under these conditions has been tested.It is shown that Na2 is reduced by 3 equivalents of P(CH2OH)3 to give 2> 2, the same species that is formed upon addition of 2 equivalents of P(CH2OH)3 to K2.Addition of 1 equivalent of P(CH2OH)3 to 2 gives >3Cl 4a while addition of 2 equivalents of P(CH2OH)3 to 2 gives an unstable species, tentatively assigned the five-co-ordinate structure 4>Cl 5a.In the presence of further P(CH2OH)3, 5a decomposes smoothly to give a mixture of 4>Cl 3b, Cl and the unusual bis(chelate) salts trans- and cis-2>Cl2 6a and 6b.A mechanism rationalising this reaction is presented.The pH of the reaction medium during the catalysis is ca. 9-10 and it is therefore concluded that 4> 3a is the main platinum-containing species present during all the platinum catalysed reactions.It is shown that 4> 18 and 4> 19 are also catalysts for the hydrophosphination of formaldehyde and a general mechanism is suggested.
STABLE MODIFIED POLYMER POLYOL DISPERSIONS
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Paragraph 0333-0335, (2021/06/26)
The present invention relates to new stable modified polymer polyol dispersions. The modified polymer polyols of the present invention comprise at least one polyol and a stable dispersion of polymeric particles in the at least one polyol. There are also disclosed processes for the preparation of the herein described modified polymer polyols, and processes for preparing polyurethane materials containing them.
A three hydroxymethyl phosphine oxide of the process and apparatus for catalytic oxidation synthesis
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Paragraph 0031-0034, (2017/03/08)
The invention relates to a synthesis process and equipment of THPO through catalytic oxidation. The synthesis process comprises the steps as follows: PH3 gas and formaldehyde gas are processed through a dryer and a filter and are fed into a fluidized bed through a fan; dry nitrogen is fed into the fluidized bed to protect the PH3 gas and the formaldehyde gas; the PH3 gas and the formaldehyde gas enter a fluidized bed system for reacting, wherein the fluidized bed carries a solid particle catalyst and the reaction temperature is 5 DEG C below zero to 5 DEG C; generated trishydroxymethyl phosphine is heated to be molten into liquid; wherein the temperature of the liquid is 60 to 100 DEG C, liquid THP is transferred into an oxidation kettle; an oxidizing agent is fed into the oxidation kettle, wherein the reaction temperature is 30 to 120 DEG C; the THPO is obtained after stirring for reaction is performed for 3 to 6 h. According to the industrial devices and process routes for producing THPO, the catalyst can be reused, the cost is low, the by-product PH3 produced during the production of sodium hypophosphite is comprehensively utilized, no three-waste is discharged, environment pollution is avoided and the national policy of green and environment protection and the strategy of sustainable development are met.
