公开(公告)号：US3398206A

公开(公告)日：1968-08-20

申请号：US57319066

申请日：1966-08-18

Applicant: BASF AG

Inventor： MAX STROHMEYER ,  KARL HILLER ,  HEINRICH SCHOLZ ,  HUBERT KINDLER

IPC: C07C2/70

CPC classification number: C07C2/70 ,  C07C2527/11 ,  C07C2527/126 ,  Y10S585/906 ,  C07C15/02

公开(公告)号：US3398183A

公开(公告)日：1968-08-20

申请号：US48111465

申请日：1965-08-19

Applicant: BASF AG

Inventor： HUBERT KINDLER ,  ARNOLD WITTWER

IPC: C07C305/00 ,  C07C305/04 ,  C07C305/06

CPC classification number: C07C303/24 ,  C07C305/06

公开(公告)号：US3410900A

公开(公告)日：1968-11-12

申请号：US53501466

申请日：1966-03-17

Applicant: BASF AG

Inventor： HUBERT KINDLER ,  DOMINIK SCHULER

IPC: C07C241/02

CPC classification number: C07C243/22 ,  C07C241/02

Abstract: 1,133,841. Production of phenylhydrazine. BADISCHE ANILIN- & SODA-FABRIK A.G. 18 March, 1966 [20 March, 1965], No. 11918/66. Heading C2C. Phenylhydrazine or salts thereof are obtained by the reduction of phenyl diazonium salts by means of sulphurous acid or salts thereof in aqueous medium wherein the reaction is commenced at from - 5‹ to + 50‹ C. and substantially an alkali or alkaline earth metal hydrogen sulphite (i.e. which may contain sulphurous acid or sulphite) is used as reducing agent in at least a 30 mole per cent stoichiometric excess and the reaction is completed by maintaining the reaction mixture at a higher temperature in the range of from 10‹ to 150‹ C. The sulphite solution preferably does not contain more than 25 mole per cent of free sulphurous acid or 60 mole per cent of sulphite (based on hydrogen sulphite) and the reduction is completed by maintaining the reactive mixture at 10‹ to 150‹ C., optionally with the addition of a mineral acid. The process may be effected batchwise or continuously, in the latter case the sulphur dioxide liberated during the reaction being absorbed, e.g. in caustic soda solution, and the sulphite and hydrogen sulphite solution thus formed may be recycled.

公开(公告)号：US2985686A

公开(公告)日：1961-05-23

申请号：US57386356

申请日：1956-03-26

Applicant: BASF AG

Inventor： WALTER BUECHE ,  HUBERT KINDLER

IPC: B01D53/14

CPC classification number: B01D53/14 ,  Y02C10/06 ,  Y10S585/901

公开(公告)号：US3297768A

公开(公告)日：1967-01-10

申请号：US44791865

申请日：1965-04-13

Applicant: BASF AG

Inventor： HUBERT KINDLER ,  GEORG TRIESCHMANN HANS

IPC: C01G49/16 ,  C07C209/60 ,  C07D295/023 ,  C07F15/02

CPC classification number: C07D295/023 ,  C01G49/16 ,  C07C209/60 ,  C07F15/025

公开(公告)号：US2894037A

公开(公告)日：1959-07-07

申请号：US68240757

申请日：1957-09-06

Applicant: BASF AG

Inventor： HUBERT KINDLER

IPC: B01D53/14 ,  C07C7/11

CPC classification number: B01D53/14 ,  C07C7/11 ,  C07C11/02