公开(公告)号：DE2436818A1

公开(公告)日：1976-02-19

申请号：DE2436818

申请日：1974-07-31

Applicant: BASF AG

Inventor： ENGELBACH HEINZ DIPL CHEM DR ,  KRABETZ RICHARD DIPL CHEM DR ,  DUEMBGEN GERD DIPL CHEM DR ,  WILLERSINN CARL-HEINZ DIPL CHE ,  LEBERT ULRICH DIPL CHEM DR ,  THIESSEN FRITZ DIPL CHEM DR

IPC: C07C57/05 ,  C07C45/35 ,  C07C51/00 ,  C07C51/25 ,  C07C57/055 ,  C07C67/00 ,  C07C57/04

公开(公告)号：DE2449780A1

公开(公告)日：1976-04-29

申请号：DE2449780

申请日：1974-10-19

Applicant: BASF AG

Inventor： ENGELBACH HEINZ DIPL CHEM DR ,  KRABETZ RICHARD DIPL CHEM DR ,  DUEMBGEN GERD DIPL CHEM DR ,  WILLERSINN CARL-HEINZ DIPL CHE ,  FREY WALTER DIPL ING DR ,  LEBERT ULRICH DIPL CHEM DR ,  THIESSEN FRITZ DIPL CHEM DR

IPC: C07C51/00 ,  C07C51/44 ,  C07C51/48 ,  C07C57/07 ,  C07C67/00 ,  C07C57/04 ,  C07C51/32

Abstract: In the oxidation of propylene and/or acrolein, high-boiling or non-volatile byproducts are separated from the solvents used for absorbing the acrylic acid by treating the said solvents laden with byproducts with the hot reaction gases in such amounts that the major portion of the solvents evaporates, the residual solvent containing a high percentage of said byproducts then being discarded or worked up.

公开(公告)号：DE2513405A1

公开(公告)日：1976-10-14

申请号：DE2513405

申请日：1975-03-26

Applicant: BASF AG

Inventor： ENGELBACH HEINZ DIPL CHEM DR ,  KRABETZ RICHARD DIPL CHEM DR ,  DUEMBGEN GERD DIPL CHEM DR ,  LEBERT ULRICH DIPL CHEM DR ,  THIESSEN FRITZ DIPL CHEM DR ,  SCHAUER HORST DIPL ING ,  ENGERT GERD-JUERGEN DIPL CHEM

IPC: B01D5/00 ,  B01J8/06 ,  C07C45/35 ,  C07C51/25 ,  C07C57/04

Abstract: In the novel prepn of acrylic acid by the oxidation of propylene with O2-contg. gases in the presence of two different catalysts placed one behind the other in a tubular reactor, at 200-400 degrees C, cooling the reactor is effected in two separate zones such that (a) the temp. of the cooling medium, in the direction of reaction gas flow in the first zone, where propylene is oxidised to acrolein, is 20-150 degrees C higher than the temp. of the cooling medium in the second zone where the acrolein formed in the presence of the first catalyst, is oxidised in the presence of the other catalyst to acrylic acid, (b) the temp. of the cooling medium within both zones increases only by up to 50 degrees C and (c) the reaction gases before reaching the second catalyst are cooled to the temp. of the second cooling medium in an intermediate space filled with the second reactor. Post-combination of the reaction gases in the first catalyst stage is obviated. Plant requirements are reduced and the process affords good control at optimal acrylic acid yield.

公开(公告)号：DE3112123A1

公开(公告)日：1982-10-07

申请号：DE3112123

申请日：1981-03-27

Applicant: BASF AG

Inventor： HORN PETER DIPL CHEM DR ,  HESSE ANTON DIPL CHEM DR ,  HECKMANN WALTER DIPL CHEM DR ,  LEBERT ULRICH DIPL CHEM DR ,  GUTHMANN ALFRED DIPL CHEM DR ,  MARX MATTHIAS DIPL CHEM DR

IPC: C08G18/40 ,  C08G18/42 ,  C08L67/00 ,  C08L71/02 ,  C08L67/02 ,  C08J3/08 ,  C08K5/05 ,  C08G18/66

Abstract: The subject invention relates to storage stable dispersions comprising certain aromatic polyesters dispersed in certain polyhydroxyl compounds and their process of preparation. The dispersions are useful for the preparation of polymers containing urethane and/or isocyanurate linkages.