EP 0000912 B1 19801001 - PROCESS FOR THE PREPARATION OF LOW MOLECULAR POLYHYDROXY COMPOUNDS
Title (en)
PROCESS FOR THE PREPARATION OF LOW MOLECULAR POLYHYDROXY COMPOUNDS
Publication
Application
Priority
DE 2738512 A 19770826
Abstract (en)
[origin: US4156636A] 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 DEG -110 DEG 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 DEG -110 DEG C.
IPC 1-7
C07H 3/04; C07H 3/02; C07C 49/17; C07C 47/19; C07C 31/18; C07C 29/14; C07C 29/00
IPC 8 full level
C07C 29/38 (2006.01); B01J 23/00 (2006.01); B01J 31/00 (2006.01); C07C 27/00 (2006.01); C07C 29/00 (2006.01); C07C 29/14 (2006.01); C07C 29/141 (2006.01); C07C 29/143 (2006.01); C07C 29/145 (2006.01); C07C 31/18 (2006.01); C07C 45/00 (2006.01); C07C 45/71 (2006.01); C07C 45/72 (2006.01); C07C 45/75 (2006.01); C07C 47/19 (2006.01); C07C 49/17 (2006.01); C07C 67/00 (2006.01); C07H 3/02 (2006.01); C07H 3/04 (2006.01); C08G 4/00 (2006.01); C08G 6/00 (2006.01); C08G 18/00 (2006.01); C08G 18/32 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/54 (2006.01)
CPC (source: EP US)
C07C 29/14 (2013.01 - EP US); C07C 29/141 (2013.01 - EP US); C07C 29/143 (2013.01 - EP US); C07C 29/145 (2013.01 - EP US); C07C 45/00 (2013.01 - EP US); C07C 45/71 (2013.01 - EP US); C07C 45/72 (2013.01 - EP US); C07C 45/75 (2013.01 - EP US); C07H 3/02 (2013.01 - EP US); C07H 3/04 (2013.01 - EP US); C08G 18/3209 (2013.01 - EP US); C08G 18/4297 (2013.01 - EP US); C08G 18/4829 (2013.01 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
BE CH DE FR GB LU NL
DOCDB simple family (publication)
EP 0000912 A1 19790307; EP 0000912 B1 19801001; DE 2738512 A1 19790308; DE 2860196 D1 19810108; IT 1106276 B 19851111; IT 7850837 A0 19780824; JP S5446288 A 19790412; JP S6233219 B2 19870720; US 4156636 A 19790529
DOCDB simple family (application)
EP 78100659 A 19780814; DE 2738512 A 19770826; DE 2860196 T 19780814; IT 5083778 A 19780824; JP 10297878 A 19780825; US 93456778 A 19780817