公开(公告)号：US3736726A

公开(公告)日：1973-06-05

申请号：US3736726D

申请日：1971-12-20

Applicant: HOECHST AG

Inventor： GRIMM R ,  HERZOG W ,  LADEMANN R

IPC: B01D53/02 ,  B01D53/04

CPC classification number: B01D53/02 ,  Y10S55/30

Abstract: Dimethyl sulfate is removed from gases, e.g., from indoor or exhaust air. The gases are conducted through active charcoal to absorb the dimethyl sulfate. The active charcoal is regenerated with a base, then washed with water and re-used for the absorption of dimethyl sulfate without any intermediate drying.

Abstract translation: 硫酸二甲酯从气体中除去，例如从室内或排气中除去。 气体通过活性炭进行吸收硫酸二甲酯。 活性炭用碱再生，然后用水洗涤并重新用于吸收硫酸二甲酯而不进行任何中间干燥。

公开(公告)号：US3801632A

公开(公告)日：1974-04-02

申请号：US3801632D

申请日：1971-12-27

Applicant: HOECHST AG

Inventor： METZGER A ,  LADEMANN R ,  WEISENBERGER K

IPC: C07C309/29 ,  B01J19/00 ,  C07C67/00 ,  C07C301/00 ,  C07C303/32 ,  C07C143/24

CPC classification number: B01J19/0086 ,  Y10S423/16

Abstract: FOR THE MANUFACTURE OF THE DISODIUM SALTS OF M-BENZENEDISULFONIC ACID, THE ACID IS NEUTRALIZED IN A STIRRED BED OF SOLID SUBSTANCE. AS SUCH STIRRED BED OF SOLID SUBSTRATE THERE IS USED THE SALT WHICH HAS BEEN FORMED BY NEUTRILZATION AND IS BEING STIRRED BY A MECHANICAL DEVICE, FOR EXAMPLE, A SCREW CONVEYOR, PADDLE SCREWOR STIRRER.

公开(公告)号：BR7409400A

公开(公告)日：1976-05-18

申请号：BR940074

申请日：1974-11-08

Applicant: HOECHST AG

Inventor： MARTINI T ,  RAMMELT P ,  LADEMANN R ,  LINDNER H

IPC: C07C17/00 ,  C07C17/20 ,  C07C22/08 ,  C07C51/62 ,  C07C63/70 ,  C07C67/00 ,  G03F7/038 ,  C07C25/14

Abstract: Preparation of derivatives of benzene containing CF3 groups from the corresponding compounds containing CCl3 groups (e.g. trichloromethyl benzene) is carried out continuously with excellent yield rates by reaction with liquid hydrogen fluoride in an autoclave above 80 DEG C, (which latter exceeds the stoichiometric proportion by at least 25 mole %). The reactants are fed continuously into the autoclave. The reaction mixture preferably becomes pressurized to at least 20 atmospheres and homogeneous after having reached a certain filling level. The reaction mixture is thereafter withdrawn proportionally to its feeding-in rate. The mixture may be conveyed through one or several additional autoclaves with the final withdrawal of the reaction mixture being out from the terminal autoclave of this cascade. The fluorination products are well known starting and inermediate products for the preparation of dyestuffs and pesticidal compositions.

公开(公告)号：IN140099B

公开(公告)日：1976-09-11

申请号：IN2492CA1973

申请日：1973-11-13

Applicant: HOECHST AG

Inventor： BILDSTEIN S ,  SCHAEFFER G ,  LADEMANN R ,  PIETZSCH S

IPC: B01J19/00 ,  C07C20060101 ,  C07C67/00 ,  C07C301/00 ,  C07C303/06 ,  C07C309/35 ,  C07C143/30

公开(公告)号：CA917878A

公开(公告)日：1973-01-02

申请号：CA74154

申请日：1970-02-06

Applicant: HOECHST AG

Inventor： LADEMANN R ,  METZGER A ,  WEISENBERGER K

IPC: C07C309/29 ,  B01J19/00 ,  C07C67/00 ,  C07C301/00 ,  C07C303/32

Abstract: 1305787 Disodium m-benzene disulphonate FARBWERKE HOECHST AG 2 Feb 1970 [8 Feb 1969] 6009/70 Heading C2C Disodium m-benzene disulphonate is prepared by adding continuously to a mechanically agitated bed of disodium m-benzene disulphonate, m-benzene disulphonic acid and a substantially stoichiometrically equivalent amount of sodium hydroxide as an aqueous solution having such a strength that the heat of neutral - ization liberated by the reaction is at least partially removed by evaporation of the water in the solution, and continuously removing from the bed an amount of disodium m-benzene disulphonate substantially equal to that formed from the reactants. The heat of neutralization liberated by reaction may be partially removed either by evaporation of water added separately to the bed or by cycling the disodium mbenzene disulphonate over a heat exchanger. The m-benzene disulphonic acid may be added to the bed as a melt.