公开(公告)号：AT147371T

公开(公告)日：1997-01-15

申请号：AT92118516

申请日：1992-10-29

Applicant: HOECHST AG

Inventor： RITTER EBERHARD DR ,  WISSER THOMAS DR ,  RIEDEL ALFRED DR ,  GSCHEIDMEIER MANFRED DR ,  MAGINOT JOACHIM

IPC: B01J21/06 ,  C07B61/00 ,  C07C5/29 ,  C07C13/40

公开(公告)号：DE4020855A1

公开(公告)日：1992-01-02

申请号：DE4020855

申请日：1990-06-29

Applicant: HOECHST AG

Inventor： RITTNER SIEGBERT DR ,  RIEDEL ALFRED DR ,  HAUTZEL VOLKER DR ,  GSCHEIDMEIER MANFRED DR ,  MAGINOT JOACHIM DIPL ING ,  TETZLAFF HERIBERT DR

IPC: C07C45/81

Abstract: Impurities are sepd. from technical grade (at least 50%) camphor (I) by melting the (I), and then cooling to allow pure (I) to crystallise out. The crystallisation process which initially sets in and continues practically to a standstill, is set in motion against at least once by a heating step. Pref., 1-4 heating steps are employed. USE/ADVANTAGE - This method gives pure (I) without the need for solvent recrystallisation (and consequently drying), so avoids loss of both product and solvent. Pure (I) is used as a plasticiser for cellulose nitrate (in prepn. of celluloid and nitrocellulose lacquer) or cellulose propionate. It is also useful as a pharmaceutical (antiseptic or cardiac stimulant);perfume component; clothes moth repellent; in smokeless gunpowder or primers, and as fumigant. (4pp Dwg.No.0/0)

公开(公告)号：DE4419686A1

公开(公告)日：1995-12-07

申请号：DE4419686

申请日：1994-06-06

Applicant: HOECHST AG

Inventor： GSCHEIDMEIER MANFRED DR ,  GUTMANN RUDOLF ,  WIESMUELLER JAKOB ,  RIEDEL ALFRED DR

IPC: B01J31/10 ,  C07B61/00 ,  C07C67/04 ,  C07C69/013 ,  C07C69/035 ,  C07C69/14 ,  C07C69/24 ,  C07C69/533 ,  C07C69/54 ,  C07C69/653 ,  C07C69/12

Abstract: Terpene esters are prepd. by reacting C10H16 terpenes with a lower carboxylic acid, in molar ratio of terpene:acid of 0.2-2:1, at 25-60 deg.C, on an acid ion-exchanger as catalyst. The reactants are passed upwards through a tubular reactor contg. the catalyst, at a rate such that the ion-exchanger is held in uniform suspension in the reactor.

公开(公告)号：DE4021408A1

公开(公告)日：1992-01-09

申请号：DE4021408

申请日：1990-07-05

Applicant: HOECHST AG

Inventor： FREYER WALTER DR ,  OLFFERS THEO ,  RIEDEL ALFRED DR

IPC: B01D53/68 ,  C01B7/01 ,  C01B7/07

公开(公告)号：DE59207842D1

公开(公告)日：1997-02-20

申请号：DE59207842

申请日：1992-10-29

Applicant: HOECHST AG

Inventor： RITTER EBERHARD DR ,  WISSER THOMAS DR ,  RIEDEL ALFRED DR ,  GSCHEIDMEIER MANFRED DR ,  MAGINOT JOACHIM

IPC: B01J21/06 ,  C07B61/00 ,  C07C5/29 ,  C07C13/40

公开(公告)号：DE3811860C2

公开(公告)日：1995-12-07

申请号：DE3811860

申请日：1988-04-08

Applicant: CALORIC ANLAGENBAU GMBH ,  HOECHST AG

Inventor： KURZ GERMAN ,  LINDE JOACHIM VON DIPL ING DR ,  GUETHOFF HEINRICH ,  FREYER WALTER DR ,  OLFFERS THEO DIPL ING ,  RIEDEL ALFRED DR

IPC: C01B7/01 ,  F23G5/16 ,  F23G7/00 ,  A62D3/00

公开(公告)号：ES2098415T3

公开(公告)日：1997-05-01

申请号：ES92118516

申请日：1992-10-29

Applicant: HOECHST AG

Inventor： RITTER EBERHARD DR ,  WISSER THOMAS DR ,  RIEDEL ALFRED DR ,  GSCHEIDMEIER MANFRED DR ,  MAGINOT JOACHIM

IPC: B01J21/06 ,  C07B61/00 ,  C07C5/29 ,  C07C13/40

公开(公告)号：BR9502681A

公开(公告)日：1996-04-30

申请号：BR9502681

申请日：1995-06-06

Applicant: HOECHST AG

Inventor： GSCHMEIDMEIER MANFRED DR ,  GUTMANN RUDOLF ,  WIESMUELLER JAKOB ,  RIEDEL ALFRED DR

IPC: B01J31/10 ,  C07B61/00 ,  C07C67/04 ,  C07C69/013 ,  C07C69/035 ,  C07C69/14 ,  C07C69/24 ,  C07C69/533 ,  C07C69/54 ,  C07C69/653 ,  C07C69/12

Abstract: Terpene esters are prepd. by reacting C10H16 terpenes with a lower carboxylic acid, in molar ratio of terpene:acid of 0.2-2:1, at 25-60 deg.C, on an acid ion-exchanger as catalyst. The reactants are passed upwards through a tubular reactor contg. the catalyst, at a rate such that the ion-exchanger is held in uniform suspension in the reactor.

公开(公告)号：DE4327872A1

公开(公告)日：1994-03-03

申请号：DE4327872

申请日：1993-08-19

Applicant: HOECHST AG

Inventor： RITTNER SIEGBERT DR ,  RIEDEL ALFRED DR ,  SCHMIDT ADOLF DR ,  SCHMIERER ROLAND DR ,  SPISKE JUERGEN DR

IPC: C07C51/44 ,  C07C53/16

Abstract: Sepn. of monochloroacetic acid from chlorination mixts. also contg. unreacted acetic acid and the di- and tri-chloroacetic acids is by rectification in a column with an ordered carbon-contg. packing. ADVANTAGE - The process has the following advantages over melt crystallisation: (i) the mono:chloro acid is sepd. in high yields without the formation of a mono:chloro acid-contg. eutectic; (ii) there is no need for prior removal of unreacted acid; and (iii) the sepn. can be effected on a continuous basis. The rectification can be combined with the melt crystallisation process or with a catalytic dechlorination process in presence of H2 (both combinations claimed).

公开(公告)号：DE3904590A1

公开(公告)日：1990-08-23

申请号：DE3904590

申请日：1989-02-16

Applicant: HOECHST AG

Inventor： RIEDEL ALFRED DR ,  LUCAS JOACHIM DR ,  SCHWARZ KARL-HEINZ DIPL ING ,  TETZLAFF HERIBERT DR

IPC: C07C51/48

Abstract: Halocarboxylic acids, which are obtained in many reactions in the form of mixtures, can be separated by means of an extraction method. This separation by means of this extraction is carried out by countercurrent distribution of the mixture in a distribution medium (bed) composed of two solvents which are not miscible with each other. The acids in question are obtained with a high degree of purity.