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91.
公开(公告)号:US4156636A
公开(公告)日:1979-05-29
申请号:US934567
申请日:1978-08-17
申请人: Hanns P. Muller , Kuno Wagner
发明人: Hanns P. Muller , Kuno Wagner
IPC分类号: C07C29/38 , B01J23/00 , B01J31/00 , C07C27/00 , C07C29/14 , C07C29/141 , C07C29/143 , C07C29/145 , C07C31/18 , C07C45/00 , C07C45/71 , C07C45/72 , C07C45/75 , C07C47/19 , C07C67/00 , C07H3/02 , C07H3/04 , C08G4/00 , C08G6/00 , C08G18/00 , C08G18/32 , C08G18/42 , C08G18/48 , C08G18/54 , C25B3/04 , C07C49/17
CPC分类号: C07H3/04 , C07C29/14 , C07C29/141 , C07C29/143 , C07C29/145 , C07C45/00 , C07C45/71 , C07C45/72 , C07C45/75 , C07H3/02 , C08G18/3209 , C08G18/4297 , C08G18/4829
摘要: Low molecular weight polyhydroxyl compounds are made from formaldehyde hydrate by an improved process comprising adjusting the pH of an aqueous solution of formaldehyde and co-catalyst to 9-12 with calcium hydroxide at 80.degree.-110.degree. C. to begin condensation and then adding to this reaction mixture aqueous formalin and/or paraformaldehyde and calcium hydroxide to maintain a pH of 7.5-9.5 and temperature of 80.degree.-110.degree. C.
摘要翻译: 低分子量多羟基化合物由甲醛水合物通过改进的方法制备,包括用80-110℃的氢氧化钙将甲醛和助催化剂的水溶液的pH调节至9-12,开始冷凝,然后加入 该反应混合物甲醛水溶液和/或多聚甲醛和氢氧化钙维持pH为7.5-9.5,温度为80°-110℃。