- Oligomeric hydroxy-aryloxy phosphazene based on cyclic chlorophosphazenes
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Reaction of hexachlorocyclotriphosphazene and a mixture of cyclic chlorophosphazene [NPCl2]n =3-8 with an excess of diphenylolpropane under different conditions affords corresponding oligomeric hydroxy-aryloxy phosphazenes, which were characterized by gas chromatography-mass spectrometry, laser mass spectrometry, 31P and 1H NMR spectroscopy. Side reactions was found with participation of decomposition products of diphenylolpropane. Pleiades Publishing, Ltd., 2013.
- Sirotin,Bilichenko,Brigadnov,Kireev,Suraeva,Borisov
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p. 1903 - 1912
(2014/05/06)
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- PROCESS FOR THE MANUFACTURE OF POLYPHENOLS
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An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system in certain specific locations, and reacting the ingredients within the reaction zone in the presence of an acid catalyst.
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Page/Page column 7
(2009/06/27)
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- IMPROVED PROCESS FOR THE MANUFACTURE OF POLYPHENOLS
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An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system in certain specific locations, and reacting the ingredients within the reaction zone in the presence of an acid catalyst.
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Page/Page column 20-21
(2008/06/13)
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- Trisphenol process
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New trisphenols and their preparation by reacting the diacyl compound of dimeric p-isopropenylphenol or of a polycarbonate with a phenol in the presence of a strong acid catalyst at temperatures between -20° and 30° C.
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- Process for the production of 2,2-(4,4'-dihydroxy-diphenyl)propane
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A process for the production of 2,2-(4,4'-dihydroxydiphenyl)propane (bisphenol A) of high purity of condensation of phenol with acetone in the presence of strong acids, which comprises Preparing an addition product of bisphenol A and phenol and Separating the constituents of this addition product by fractional condensation of the vapours obtained by treating the addition product at high temperature and at reduced pressure for a short time.
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