公开(公告)号：DE19741455A1

公开(公告)日：1999-03-25

申请号：DE19741455

申请日：1997-09-19

Applicant: HOECHST AG

Inventor： HEFFELS STEFAN DR ,  FISCHER EBERHARD DR ,  WAMBACH WINFRIED

IPC: C07C303/08 ,  C07C303/44 ,  C07C309/88 ,  C07C315/04 ,  C07C317/36 ,  C07C313/02

Abstract: A process for the production of parabase ester is claimed; this involves at least one of the following processes which are the subject of independent claims: (i) the production of acetanilide from aniline and acetic acid, the reaction being carried out in a static mixer; (ii) chlorosulphonation of acetanilide, in which acetanilide is introduced into a reactor as a molten liquid and reacted with chlorosulphonic acid (ClSA) and thionyl chloride; (iii) crystallisation of acetaminobenzene-sulphonyl chloride (ABSCl) from the reaction mixture from stage (ii), a process in which hydrogen chloride, sulphur dioxide, ClSA and thionyl chloride are removed by evaporation, (iv) the crystallisation of acetaminobenzene-sulphinic acid (ABSA), which is carried out as a continuous process; (v) the esterification of acetaminosulphone (AASO) with sulphuric acid (H2SO4) by mixing AASO with H2SO4, feeding the mixture into a mixing reactor and esterifying at 120-170 deg C.

公开(公告)号：DK0612557T3

公开(公告)日：1997-12-01

申请号：DK94100847

申请日：1994-01-21

Applicant: HOECHST AG

Inventor： HEFFELS STEFAN DR ,  HARTEL JOHANNES ,  MISCHKE PETER DR

IPC: B01F3/12 ,  B01F5/20 ,  B05B17/06 ,  C09B67/00 ,  C09B67/08

Abstract: By means of a method for the uniform distribution of a small amount of liquid onto the surface of finely divided solids, characterised in that the said liquid is sprayed by means of one or more ultrasonic jet(s) onto the finely divided solids to be treated before or during, or before and during mixing of the said solids in a mixing apparatus, granules, powder or dusts can be dedusted by the use of very small amounts of liquid. The method according to the invention is also suitable for applying emulsions, solutions, dispersions or melts onto the surface of solid particles. The invention also relates to an apparatus for carrying out the said method, characterised in that one or more ultrasonic jet(s) is or are combined with a mechanical or pneumatic mixer.

公开(公告)号：DE19732814A1

公开(公告)日：1999-02-04

申请号：DE19732814

申请日：1997-07-30

Applicant: HOECHST AG

Inventor： HEFFELS STEFAN DR ,  FISCHER EBERHARD DR ,  WAMBACH WINFRIED

IPC: B01J19/00 ,  B01J19/18 ,  C07C303/08 ,  C07C303/44 ,  C07C309/88 ,  C07C315/04 ,  C07C317/36 ,  C07C313/04 ,  C07C231/02 ,  C07C233/07 ,  C07C313/02 ,  C07C317/40

Abstract: A process for the production of parabase ester comprises: (i) the production of acetanilide from aniline and acetic acid, the reaction being carried out in a static mixer; (ii) chlorosulphonation of acetanilide, in which acetanilide is introduced into a reactor as a molten liquid and reacted with chlorosulphonic acid (ClSA) and thionyl chloride; (iii) crystallisation of acetaminobenzene- sulphonyl chloride (ABSCl) from a solution containing ABSCl, ClSA and hydrogen chloride (HCl), the ClSA and HCl being removed by evaporation, (iv) the crystallisation of acetaminobenzene- sulphinic acid (ABSA), which is carried out as a continuous process; (v) the esterification of acetaminosulphone (AASO) with sulphuric acid (H2SO4) by feeding H2SO4-containing AASO in suspension in H2SO4 into a mixing reactor.

公开(公告)号：DE4305713A1

公开(公告)日：1994-09-01

申请号：DE4305713

申请日：1993-02-25

Applicant: HOECHST AG

Inventor： HEFFELS STEFAN DR ,  HARTEL JOHANNES ,  NOELTNER GERHARD ,  MISCHKE PETER DR

IPC: B01F3/12 ,  B01F5/20 ,  B05B17/06 ,  C09B67/00 ,  C09B67/08 ,  B01J2/30

Abstract: By means of a method for the uniform distribution of a small amount of liquid onto the surface of finely divided solids, characterised in that the said liquid is sprayed by means of one or more ultrasonic jet(s) onto the finely divided solids to be treated before or during, or before and during mixing of the said solids in a mixing apparatus, granules, powder or dusts can be dedusted by the use of very small amounts of liquid. The method according to the invention is also suitable for applying emulsions, solutions, dispersions or melts onto the surface of solid particles. The invention also relates to an apparatus for carrying out the said method, characterised in that one or more ultrasonic jet(s) is or are combined with a mechanical or pneumatic mixer.

公开(公告)号：DE59402791D1

公开(公告)日：1997-06-26

申请号：DE59402791

申请日：1994-01-21

Applicant: HOECHST AG

Inventor： HEFFELS STEFAN DR ,  HARTEL JOHANNES ,  NOELTNER GERHARD ,  MISCHKE PETER DR

IPC: B01F3/12 ,  B01F5/20 ,  B05B17/06 ,  C09B67/00 ,  C09B67/08

Abstract: By means of a method for the uniform distribution of a small amount of liquid onto the surface of finely divided solids, characterised in that the said liquid is sprayed by means of one or more ultrasonic jet(s) onto the finely divided solids to be treated before or during, or before and during mixing of the said solids in a mixing apparatus, granules, powder or dusts can be dedusted by the use of very small amounts of liquid. The method according to the invention is also suitable for applying emulsions, solutions, dispersions or melts onto the surface of solid particles. The invention also relates to an apparatus for carrying out the said method, characterised in that one or more ultrasonic jet(s) is or are combined with a mechanical or pneumatic mixer.

公开(公告)号：BR9400659A

公开(公告)日：1994-10-04

申请号：BR9400659

申请日：1994-02-24

Applicant: HOECHST AG

Inventor： HEFFELS STEFAN DR ,  HARTEL JOHANNES ,  NOEITNER GERHARD ,  MISCHKE PETER DR

IPC: B01F3/12 ,  B01F5/20 ,  B05B17/06 ,  C09B67/00 ,  C09B67/08 ,  B01J2/30

Abstract: By means of a method for the uniform distribution of a small amount of liquid onto the surface of finely divided solids, characterised in that the said liquid is sprayed by means of one or more ultrasonic jet(s) onto the finely divided solids to be treated before or during, or before and during mixing of the said solids in a mixing apparatus, granules, powder or dusts can be dedusted by the use of very small amounts of liquid. The method according to the invention is also suitable for applying emulsions, solutions, dispersions or melts onto the surface of solid particles. The invention also relates to an apparatus for carrying out the said method, characterised in that one or more ultrasonic jet(s) is or are combined with a mechanical or pneumatic mixer.