公开(公告)号：DE59607662D1

公开(公告)日：2001-10-18

申请号：DE59607662

申请日：1996-07-23

Applicant: DEGUSSA

Inventor： HOEPP DR ,  KOEHLER KLAUS ,  ARNTZ DR

IPC: B01J31/02 ,  C07B61/00 ,  C07C45/51 ,  C07C45/75 ,  C07C47/277

Abstract: The prodn. of 2-(alkoxymethyl)-acrolein cpds. of formula(I), in which R = 1-6C alkyl or 3-6C alkoxyalkyl, comprises reacting acrolein with an equimolar amt. of a source of formaldehyde (II) in presence of at least an equimolar amt. of alcohol of formula ROH (III) and a catalyst system based on a sec. amine and a mineral acid, at pH 1-7. Pref. (II) is a 1-4C prim. or sec. alcohol and (III) is polymeric formaldehyde. The reaction is carried out at 20-100 degrees C and pH 3-6.5, with a mol. ratio of (acrolein):(III) = (1:2)-(1:10). Pref. procedure comprises treating a mixt. of (III) and catalyst system with (II) and then adding acrolein at 40-100 degrees C and pH 3-6.5 in such a way that the mixt. always contains less than 20 mole% 3-alkoxy- propionaldehyde based on added acrolein. The reaction mixt. is then worked up by distn.

公开(公告)号：DE59800181D1

公开(公告)日：2000-08-03

申请号：DE59800181

申请日：1998-02-17

Applicant: DEGUSSA

Inventor： MORAWIETZ DR ,  ARNTZ DR ,  HOEPP DR

IPC: B01J20/22 ,  B01J23/02 ,  B01J23/04 ,  C07B61/00 ,  C07C41/01 ,  C07C41/06 ,  C07C43/13 ,  C10M105/18 ,  C11D3/20

公开(公告)号：DE59510436D1

公开(公告)日：2002-12-05

申请号：DE59510436

申请日：1995-08-23

Applicant: DEGUSSA

Inventor： HOEPP DR ,  ARNTZ DR ,  BOECK DR ,  BOSSE-PLOIS ANDREAS ,  RAIBLE KLAUS

IPC: B01J31/10 ,  C07B61/00 ,  C07D317/12

Abstract: Prepn. of 2-vinyl-1,3-dioxolane, comprises the following steps: (1) reaction of acrolein with ethylene glycol at less than 50 degrees C in the presence of a solid acid catalyst; (2) extraction of the reaction mixt. with an organic solvent having a b.pt. greater than 130 degrees C, in which ethylene glycol is essentially insoluble; and (3) distilln. of the aq. phase contg. ethylene glycol and the organic phase contg. the dioxolane.