公开(公告)号：DE3332018A1

公开(公告)日：1985-03-21

申请号：DE3332018

申请日：1983-09-06

Applicant: BASF AG

Inventor： REUVERS JOHANNES G DR ,  RICHTER WOLFGANG DR ,  KUMMER RUDOLF DR

IPC: C07C67/38 ,  C07C69/40

Abstract: A process for the preparation of succinic acid diesters by carbonylation of acrylic acid esters in the presence of alcohols, using a cobalt carbonyl complex as the catalyst and a heterocyclic nitrogen base as the promoter, at 80 DEG -200 DEG C. and under a carbon monoxide pressure of 60-300 bar, wherein the reaction is carried out in the presence of not less than 20% by weight, based on the amount of all the liquid constituents of the reaction mixture, of an inert liquid and the concentration of the acrylic acid ester is kept, for the predominant part of the reaction time, at below 15% by weight, again based on the amount of all liquid constituents.

公开(公告)号：DE3462246D1

公开(公告)日：1987-03-05

申请号：DE3462246

申请日：1984-09-03

Applicant: BASF AG

Inventor： REUVERS JOHANNES G DR ,  RICHTER WOLFGANG DR ,  KUMMER RUDOLF DR

IPC: C07C67/38 ,  C07C69/40

Abstract: A process for the preparation of succinic acid diesters by carbonylation of acrylic acid esters in the presence of alcohols, using a cobalt carbonyl complex as the catalyst and a heterocyclic nitrogen base as the promoter, at 80 DEG -200 DEG C. and under a carbon monoxide pressure of 60-300 bar, wherein the reaction is carried out in the presence of not less than 20% by weight, based on the amount of all the liquid constituents of the reaction mixture, of an inert liquid and the concentration of the acrylic acid ester is kept, for the predominant part of the reaction time, at below 15% by weight, again based on the amount of all liquid constituents.

公开(公告)号：AT310946T

公开(公告)日：2005-12-15

申请号：AT01117674

申请日：2001-07-26

Applicant: BASF AG

Inventor： SACHWEH BERND DR ,  HEFFELS CAMIEL DR ,  RAEDLE MATTHIAS DR ,  BIERMANN HELMUT ,  EISEN HANS JUERGEN ,  ETTMUELLER JUERGEN ,  REUVERS JOHANNES G DR

IPC: G01N15/02

Abstract: The method involves subjecting the particles to electromagnetic radiation that is scattered on the particles, determining the intensity of the scattered radiation in at least two different scattering regions and setting them in relation to each other. One scattering region contains the forward scattering region and another the rearward scattering region. Independent claims are also included for the following: (1) an arrangement for determining collective physical parameters of particles in gases; (2) a use of the method for aerosols in gases; (3) a computer program for implementing the method; (4) a data medium with a computer program.