公开(公告)号：US3920743A

公开(公告)日：1975-11-18

申请号：US51548674

申请日：1974-10-17

Applicant: HOECHST AG

Inventor： BAESSLER KONRAD ,  MAYER KURT

IPC: B01J23/42 ,  B01J37/20 ,  C07C85/11

CPC classification number: B01J37/20 ,  B01J23/42

Abstract: Sulfided platinum on carbon catalysts being useful in the selective hydrogenation of halonitroaromates are obtained by saturating a particulate platinum on carbon catalyst with hydrogen in an acidic aqueous medium and treating it with defined amounts of a sulfidizing agent. Said catalysts maintain their activity and selectivity for numerous hydrogenations.

公开(公告)号：US3929891A

公开(公告)日：1975-12-30

申请号：US42329873

申请日：1973-12-10

Applicant: HOECHST AG

Inventor： HABIG KURT ,  BAESSLER KONRAD

IPC: B01J21/18 ,  B01J23/40 ,  B01J23/42 ,  B01J37/20 ,  C07C85/11

CPC classification number: B01J37/20 ,  B01J21/18 ,  B01J23/40 ,  B01J23/42

Abstract: Sulfited platinum on carbon catalysts being useful in the selective hydrogenation of halonitroaromatic compounds are obtained by saturating a particulate platinum on carbon catalyst with hydrogen in an acidic aqueous medium and treating it with defined amounts of a sulfitizing agent. Said catalysts maintain their activity and selectivity for numerous hydrogenations.

Abstract translation: 通过在酸性水性介质中用氢气将颗粒状铂催化剂在碳催化剂上饱和并用限定量的亚硫酸盐处理来获得用于卤代硝基芳族化合物的选择性氢化的亚硫酸铂碳催化剂。 所述催化剂保持其对许多氢化的活性和选择性。

公开(公告)号：US3917723A

公开(公告)日：1975-11-04

申请号：US41463273

申请日：1973-11-12

Applicant: HOECHST AG

Inventor： SZCZEPANSKI NORBERT ,  BAESSLER KONRAD

IPC: C07C67/00 ,  C07C201/00 ,  C07C205/12 ,  C07C79/12

CPC classification number: C07C201/12 ,  C07C205/12

Abstract: Preparation of m-chloronitrobenzene by partial chlorinating denitration of m-dinitrobenzene with chlorine under normal or reduced pressure at elevated temperatures.

Abstract translation: 通过在正常或减压下在升高的温度下用氯气对二硝基苯进行部分氯化脱硝来制备间氯硝基苯。

公开(公告)号：CA1144943A

公开(公告)日：1983-04-19

申请号：CA352291

申请日：1980-05-20

Applicant: HOECHST AG

Inventor： HABIG KURT ,  BAESSLER KONRAD ,  SCHULZ LOTHAR ,  SCHUETTE HEINZ

IPC: C07B43/02 ,  C07C201/16 ,  C07C79/12 ,  C07C143/78

Abstract: Nitrosation agent(s), contained as by-products in nitrated aromatic compounds after nitration with nitric acid or nitration acid, are removed by a water treatment. wherein the water is distilled off at least partially in vapor form, advantageously under reduced pressure. In the further reaction of the nitrocompounds treated in this manner undesired nitrosamines are practically not formed. The process is especially suitable for the manufacture of 4-di-n-propylamino-3,5-dinitrobenzotrifluoride (Trifluralin) a valuable herbicide substantially, free from nitrosamlne(s).

公开(公告)号：CA1128962A

公开(公告)日：1982-08-03

申请号：CA352305

申请日：1980-05-16

Applicant: HOECHST AG

Inventor： VOLKWEIN GERT ,  BAESSLER KONRAD ,  WOLFRAM HANS

IPC: C07C17/00 ,  C07C17/093 ,  C07C25/10 ,  C07C67/00

Abstract: HOE 79/F 123 PROCESS FOR THE MANUFACTURE OF 1,3,5-TRICHLOROBENZENE of the disclosure: 1,3,5-trichlorobenzene is manufactured by treating 5-chloro-1,3-dinitrobenzene and/or 3,5-dichloronitro-benzene with chlorine, at a temperature from about 200 to 270.degree.C, preferably from about 230 to 250.degree.C. The resulting process product is an intermediate, for example in plant protection.

公开(公告)号：CA1111449A

公开(公告)日：1981-10-27

申请号：CA308185

申请日：1978-07-26

Applicant: HOECHST AG

Inventor： PLANKER SIEGFRIED ,  BAESSLER KONRAD ,  FUCHS OTTO

IPC: C07B61/00 ,  B01J31/00 ,  B01J31/28 ,  C07C20060101 ,  C07C67/00 ,  C07C241/00 ,  C07C243/22 ,  C07C109/04

Abstract: PROCESS FOR THE PREPARATION OF 2,2'-DICHLORO-HYDRAZOBENZENE of the disclosure: The catalytic hydrogenation of o-nitro-chlorobenzene in aqueous alkali metal hydroxide solution with addition of an aromatic non-watermiscible solvent at an elevated temperature and under pressure using a noble metal catalyst and a polycyclic quinone as a co-catalyst leads to high and wellreproducible yields of 2,2'-dichloro-hydrazobenzene when the quinone is a derivative of anthraquinone, especially a hydroxy-anthraquinone. The product is obtained in so high a quality that it can be transformed without isolation or purification into 3,3'-dichlorobenzidine.

公开(公告)号：CA971943A

公开(公告)日：1975-07-29

申请号：CA105335

申请日：1971-02-15

Applicant: HOECHST AG

Inventor： BAESSLER KONRAD ,  MAYER KURT

公开(公告)号：CA1133014A

公开(公告)日：1982-10-05

申请号：CA355358

申请日：1980-07-03

Applicant: HOECHST AG

Inventor： HABIG KURT ,  BAESSLER KONRAD

IPC: A61K31/64 ,  A61P3/08 ,  A61P3/10 ,  C07D209/46 ,  C07D217/24 ,  C07C79/12 ,  C07C143/78

Abstract: Nitrated aromatic compounds with a solidification point of more than about 10.degree.C are obtained from the nitration batch without separation of the aqueous phase by crystallization in a form practically without nitrosation agents. 4-Chloro-3,5-dinitrobenzotrifluoride, for example, which has been crystallized in this way, yields a Trifluralin, which has a nitrosamine content of a maximum of about 1 ppm upon further reaction with di-n-propylamine.

公开(公告)号：FR2464247A1

公开(公告)日：1981-03-06

申请号：FR8019113

申请日：1980-09-04

Applicant: HOECHST AG

Inventor： MULLER HELMUT ,  BAESSLER KONRAD

IPC: C07C205/26 ,  C07C79/32 ,  C07C76/02

Abstract: A process for preparing 5-chloro-2-nitrophenol from 2,4-dichloronitrobenzene and excess alkali metal hydroxide in the presence of aprotic polar solvents at 20 DEG to 150 DEG C.

公开(公告)号：CA995246A

公开(公告)日：1976-08-17

申请号：CA134024

申请日：1972-02-07

Applicant: HOECHST AG

Inventor： HABIG KURT ,  BAESSLER KONRAD

IPC: B01J21/18 ,  B01J23/40 ,  B01J23/42 ,  B01J37/20

Abstract: 1387481 Sulphited platinum - on - carbon catalyst HOECHST AG 31 Jan 1972 [8 Feb 1971 (2)] 4412/72 Heading B1E [Also in Division C2] Sulphited platinum-on-carbon catalyst, of use in the preparation of halogenated aromatic amines by hydrogenation of the corresponding halogenated nitroaromatic compounds, is prepared by a process wherein particulate platinum-on-carbon suspended in an acidic aqueous medium is saturated with hydrogen and thereafter treated with a sulphiting agent in an amount such that from 0.3 to 0.7, preferably from 0.45 to 0.6, moles of sulphiting agent are absorbed per mole of hydrogen absorbed by the platinum-on-carbon. The particulate platinum-on-carbon, which preferably has a surface area of at least 800 m 2 /g, for example from 800 to 1600 m 2 /g, and a particle size distribution such that at least 40 weight per cent of the particles have a diameter of less than 20 microns, may contain from 1 to 10 weight per cent platinum which preferably has a surface area of from 6 to 12 m 2 /g and a crystallite size of less than 20 Angstroms. The aqueous medium preferably has a pH of from 0 to 5 and may contain non-oxidizing mineral/lower aliphatic carboxylic acid; specified acids are hydrohalic, sulphuric, phosphoric, formic, acetic and propionic acids. Specified sulphiting agents are ammonium and alkali metal sulphites, hydrogen sulphites and disulphites (i.e. metabisulphites and pyrosulphites) and sulphur dioxide. As exemplified, platinum-on-carbon containing 5 weight per cent platinum and having a total surface area of 800 m 2 /g, a platinum surface area of 10 m 2 /g and a platinum crystallite size of 10 Angstroms is suspended in dilute aqueous sulphuric acid, saturated with hydrogen and treated with sodium sulphite (Na 2 SO 3 ) in aqueous solution (Example 1) or potassium disulphite (K 2 S 2 O 5 ) in aqueous solution (Example 2) or sodium hydrogen sulphite (NaHSO 3 ) in aqueous solution (Example 3) or sulphur dioxide in gaseous form (Example 4). Reference is made to Specification 1069416.