CAS: 2444-90-8; Sodium 4,4'-(Propane-2,2-Diyl)Diphenolate

上下游产品

BPAphenoxy>tetrachlorobenzene1,4-di4-1-methyl-1-(4-hydroxyphenyl)ethylphenoxytetrachlorobenzene 2,2-bis(4-hydroxyphenyl)propane bis(N-phenyl-3-phthalimidyl ether) 2,2,3,3-Tetrafluoro-3-(4-{1-methyl-1-[4-(1,1,2,2-tetrafluoro-ethoxy)-phenyl]-ethyl}-phenoxy)-propionic acid methyl ester bis(2,2,3,3-tetafluoropropionate)Dimethyl 3,3'-(1-methylethylidene)bis(4,1-phenyleneoxy)bis(2,2,3,3-tetafluoropropionate)

专利信息

专利号:US-3965125-A
优先权日:1971-02-08
标题:Synthesis of certain bis(phthalic anhydrides)
发明人：MEYERS ROBERT A
权利人:TRW INC
摘要:Monomeric high molecular weight dianhydrides or tetraacids can be produced by the nucleophilic coupling of a halo substituted phthalimides acid and an aliphatic or aromatic compound having polyfunctional groups capable of reacting with the halo moiety of the phthalinide followed by hydrolysis and dehydration. Specifically, 4-chlorophthalate sodium salt is converted to an imide to reduce side reactions with the carboxylic acid groups prior to reaction with 4,4'-disodiumdiphenylene oxide sulfone or 2,2-di (4-sodium phenoxide) propane. After the reaction of the imide and the sulfone or propane compounds, the diimide formed is converted to the corresponding dianhydride.

专利号:US-6251354-B1
优先权日:1999-04-02
标 题:Process for recovering sodium nitrite
发明人：GREENWELL ROBERT E; GUGGENHEIM THOMAS LINK; JOHNSON NORMAN ENOCH; ODLE ROY RAY; WEBB JIMMY LYNN
权利人:GEN ELECTRIC
摘要:The present invention provides a process for recovering a metal nitrite, e.g., sodium nitrite, from a reaction mixture formed from an aromatic displacement reaction such as the synthesis of an aromatic bis(ether phthalimide) in an organic non-polar solvent. The process comprises forming a reaction mixture from the synthesis of an aromatic bis(ether phthalimide) comprising a recoverable amount of metal nitrite; treating the reaction mixture with an amount of water effective to produce an aqueous solution phase of metal nitrite and an organic non-polar phase; and separating the aqueous solution phase of metal nitrite from the organic non-polar phase.

专利号:JP-H0832680-B2
优先权日:1986-12-31
标题:Synthesis of aromatic bisether phthalimide compounds

专利号:JP-2020503418-A
优先权日:2016-12-31
标 题 :Synthesis of reactive intermediate of polyetherimide and its use

专利号:EP-2880079-B1
优先权日:2012-08-02
标题 :Synthesis of and curing additives for phthalonitriles

专利号:CN-218654510-U
优先权日:2022-11-24
标题 :A kind of engineering plastics synthesis equipment