公开(公告)号：CZ82899A3

公开(公告)日：1999-06-16

申请号：CZ82899

申请日：1997-09-18

Applicant: BASF AG

Inventor： MARTIN FRIEDRICH-GEORG ,  SCHRAUT ARMIN ,  WEKERLE JOSEF

IPC: C07C67/08 ,  C07C67/48 ,  C07C69/54

Abstract: In the preparation of esters of acrylic or methacrylic acid by esterification with alcohols, the interfering deposits formed on the apparatus parts by relatively high molecular weight by-products can be avoided, removed or lessened by allowing a liquid partly or wholly consisting of the alcohol used for the esterification to act on the deposits, fouled apparatus parts or on the surfaces of the apparatus parts on which deposits are easily formed, with preference being given to wetting the deposits or surfaces using suitable nozzles or cleaning sprayers.

公开(公告)号：AU8801698A

公开(公告)日：1999-01-19

申请号：AU8801698

申请日：1998-06-26

Applicant: BASF AG

Inventor： HENNIG GUNNAR ,  SCHRAUT ARMIN ,  MARTIN FRIEDRICH-GEORG ,  ULBRICH MICHAEL-DIETER ,  BAUR KARL GERHARD ,  THIESSEN FRITZ

IPC: C07C67/08 ,  C07C67/54 ,  C07C69/54

Abstract: The invention relates to a method for producing alkyl(meth)acrylate by continuous reaction of an aqueous solution containing (meth)acrylic acid obtained directly from gas-phase oxidation by reacting with a straight-chain or branched alkanol with 1 to 6 C atoms or a mixture of two or more thereof in the presence of an esterification catalyst. The inventive method is characterized in that alkanol is introduced into aqueous solution containing (meth)acrylic acid in the form of a gas.