公开(公告)号：ZA806057B

公开(公告)日：1981-10-28

申请号：ZA806057

申请日：1980-10-01

Applicant: HOECHST AG

Inventor： GEHRMANN K ,  KUEBBELER H ,  ERPENBACH H ,  SCHMITZ K

IPC: C07C53/12 ,  B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C67/00 ,  C07C

Abstract: The invention relates to an improved process for making acetic anhydride by reacting methyl acetate and/or dimethylether with carbon monoxide under practically anhydrous conditions, at temperatures of 350 to 575 K., under pressures of 1 to 300 bars, and in the presence of a catalyst system containing noble metals belonging to group VIII of the periodic system of the elements, or compounds thereof, iodine and/or its compounds, and an aliphatic carboxylic acid having 1 to 8 carbon atoms. The improved process is effected in the presence of a catalyst system containing, as additional ingredients, a heterocyclic aromatic compound, in which at least one hetero atom is a quaternary nitrogen atom, or a quaternary organophosphorus compound, and a zirconium compound being soluble in the reaction mixture.

公开(公告)号：ZA8006057B

公开(公告)日：1981-10-28

申请号：ZA8006057

申请日：1980-10-01

Applicant: HOECHST AG

Inventor： GEHRMANN K ,  KUEBBELER H ,  ERPENBACH H ,  SCHMITZ K

IPC: C07C53/12 ,  B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C67/00 ,  C07C

CPC classification number: C07C51/54 ,  C07C51/56 ,  C07C53/12

公开(公告)号：BR8006316A

公开(公告)日：1981-04-14

申请号：BR8006316

申请日：1980-10-01

Applicant: HOECHST AG

Inventor： ERPENBACH H ,  KUBBELER H ,  SCHMITZ K ,  GEHRMANN K

IPC: C07C53/12 ,  B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C67/00

Abstract: The invention relates to an improved process for making acetic anhydride by reacting methyl acetate and/or dimethylether with carbon monoxide under practically anhydrous conditions, at temperatures of 350 to 575 K., under pressures of 1 to 300 bars, and in the presence of a catalyst system containing noble metals belonging to group VIII of the periodic system of the elements, or compounds thereof, iodine and/or its compounds, and an aliphatic carboxylic acid having 1 to 8 carbon atoms. The improved process is effected in the presence of a catalyst system containing, as additional ingredients, a heterocyclic aromatic compound, in which at least one hetero atom is a quaternary nitrogen atom, or a quaternary organophosphorus compound, and a zirconium compound being soluble in the reaction mixture.

公开(公告)号：BR8105527A

公开(公告)日：1982-05-18

申请号：BR8105527

申请日：1981-08-31

Applicant: HOECHST AG

Inventor： ERPENBACH H ,  KUBBELER H ,  SCHMITZ K ,  GEHRMANN K

IPC: C07C17/00 ,  B01J31/00 ,  B01J31/28 ,  C07B61/00 ,  C07C17/093 ,  C07C17/18 ,  C07C17/363 ,  C07C19/07 ,  C07C51/00 ,  C07C51/09 ,  C07C67/00 ,  C07C17/22

Abstract: The invention relates to the production of anhydrous alkyl iodides. To this end, carboxylic acid alkyl esters of the formula R1COOR2, in which R1 stands for hydrogen or an alkyl or aryl radical having from 1 to 8 carbon atoms and R2 stands for an alkyl group having from 1 to 4 carbon atoms, are reacted with iodine and hydrogen and optionally with carbon monoxide in the presence of compounds of noble metals comprised of rhodium, iridium, palladium or ruthenium as catalyst, and of a heterocyclic aromatic compound, in which at least one hetero atom is a quaternary nitrogen atom, or of a quaternary organophosphorus compound as a promoter, and optionally also in the presence of a carboxylic acid having from 1 to 8 carbon atoms and/or its anhydrides. The reaction is effected under practically anhydrous conditions at temperatures of from 350 to 420 K. and under a total pressure of up to 30 bars.

公开(公告)号：ZA794293B

公开(公告)日：1980-09-24

申请号：ZA794293

申请日：1979-08-16

Applicant: HOECHST AG

Inventor： SCHMITZ K ,  ERPENBACH H ,  KUEBBELER H ,  GEHRMANN K

IPC: B01J31/00 ,  C07C53/12 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C67/00 ,  C07C

Abstract: The invention provides a process for making acetic anhydride, wherein methyl acetate and/or dimethylether is (are) reacted with carbon monoxide under substantially anhydrous conditions, at temperatures of 350 to 575 K and under pressures of 1 to 300 bars in the presence of a catalyst system comprised of noble metals belonging to group VIII of the periodic system of the elements, or their compounds and iodine and/or its compounds. More specifically, an aliphatic carboxylic acid with 1 to 8 carbon atoms and at least one heterocyclic aromatic compound, in which at least one hetero atom is a quaternary nitrogen atom are used as promoters.

公开(公告)号：ZA7904293B

公开(公告)日：1980-09-24

申请号：ZA7904293

申请日：1979-08-16

Applicant: HOECHST AG

Inventor： SCHMITZ K ,  ERPENBACH H ,  KUEBBELER H ,  GEHRMANN K

IPC: C07C53/12 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C67/00 ,  C07C

CPC classification number: C07C51/54 ,  C07C51/56 ,  C07C53/12