公开(公告)号：IN140659B

公开(公告)日：1976-12-11

申请号：IN2793CA1973

申请日：1973-12-22

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  SCHIESSLER S ,  TRONICH W

IPC: C09B67/16 ,  C09B67/50 ,  C09B67/54 ,  C09B48/00 ,  C09B57/00 ,  C09B47/00

Abstract: A process for preparing very pure copper phthalocyanine pigments of the alpha -modification, wherein substituted or unsubstituted copper phthalocyanines having different degrees of purity are converted into copper phthalocyanine salts capable of being isolated, with the aid of suitable acids which dissolve the impurities contained in the dyestuff, wherein these salts are separated from the acid, the copper phthalocyanines of the alpha -modification are set free in a pure form from the copper phthalocyanine salts by the action of water and wherein the isolated copper phthalocyanine is subject in an aqueous suspension to a mechanical fine division. This process yields copper phthalocyanines of the alpha -modification in a very pure form without causing problems with respect to the waste water.

公开(公告)号：DK633474A

公开(公告)日：1975-07-28

申请号：DK633474

申请日：1974-12-05

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  SCHIESSLER S ,  TRONICH W

IPC: C09B67/16 ,  C09B67/20 ,  C09B67/26 ,  C09B67/50 ,  C09B47/04

Abstract: This invention relates to a process for the preparation of a very pure copper phthalocyanine pigment of the alpha -modification which comprises dissolving crude copper phthalocyanine in a 80 to 86% sulfuric acid isolating the copper phthalocyanine sulfate formed, hydrolizing the sulfate and grinding the copper phthalocyanine thus obtained in an aqueous-organic medium.

公开(公告)号：BR7310119D0

公开(公告)日：1974-09-24

申请号：BR1011973

申请日：1973-12-21

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  SCHIESSLER S ,  TRONICH W

IPC: C09B67/16 ,  C09B67/50 ,  C09B67/54 ,  C09C1/00

Abstract: A process for preparing very pure copper phthalocyanine pigments of the alpha -modification, wherein substituted or unsubstituted copper phthalocyanines having different degrees of purity are converted into copper phthalocyanine salts capable of being isolated, with the aid of suitable acids which dissolve the impurities contained in the dyestuff, wherein these salts are separated from the acid, the copper phthalocyanines of the alpha -modification are set free in a pure form from the copper phthalocyanine salts by the action of water and wherein the isolated copper phthalocyanine is subject in an aqueous suspension to a mechanical fine division. This process yields copper phthalocyanines of the alpha -modification in a very pure form without causing problems with respect to the waste water.

公开(公告)号：DK141054C

公开(公告)日：1980-06-23

申请号：DK196075

申请日：1975-05-05

Applicant: HOECHST AG

Inventor： SCHIESSLER S ,  SPIETSCHKA E ,  ELINKMANN H-G

IPC: C09B67/12

Abstract: Highly pure alpha -copper phthalocyanine is obtained when a product regenerated from alpha -copper phthalocyanine sulfate by hydrolysis with water is aftertreated in an aqueous medium containing a polar organic non-aromatic compound which is water-soluble or liquid. The aftertreated product has an especially high tinctorial strength, is very easily dispersible and has a very pure reddish-blue shade.

公开(公告)号：DK139756B

公开(公告)日：1979-04-09

申请号：DK23175

申请日：1975-01-24

Applicant: HOECHST AG

Inventor： TRONICH W ,  SPIETSCHKA E ,  SCHIESSLER S

IPC: C09B47/10

公开(公告)号：BR7505311A

公开(公告)日：1976-08-03

申请号：BR7505311

申请日：1975-08-20

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  TRONICH W ,  SCHIESSLER S ,  ELINKMANN H

IPC: C09B67/20 ,  C09B47/04 ,  C09B47/08 ,  C09B67/22 ,  D06P1/16 ,  D06P1/14

公开(公告)号：DK374875A

公开(公告)日：1976-02-22

申请号：DK374875

申请日：1975-08-20

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  TRONICH W ,  SCHIESSLER S ,  ELINKMANN H-G

IPC: C09B67/20 ,  C09B47/04 ,  C09B47/08 ,  C09B67/22 ,  D06P1/16 ,  C09B

公开(公告)号：DK317774A

公开(公告)日：1975-02-17

申请号：DK317774

申请日：1974-06-13

Applicant: HOECHST AG

Inventor： PLESSEN H V ,  FISCHER E ,  SCHIESSLER S

IPC: C01B17/88 ,  C01B17/90

Abstract: Contaminated sulfuric acid which may contain water, organic compounds and inorganic salts is converted to almost pure concentrated sulfuric acid by passing the acid through a Pauling plant and distilling the concentrated contaminated acid.

公开(公告)号：BR7310118D0

公开(公告)日：1974-08-15

申请号：BR1011873

申请日：1973-12-21

Applicant: HOECHST AG

Inventor： SCHIESSLER S ,  SPIETSCHKA E ,  TRONICH W

IPC: C09B47/24 ,  C09B67/16 ,  C09B67/54 ,  C09C3/00

公开(公告)号：DK145501C

公开(公告)日：1983-04-25

申请号：DK699573

申请日：1973-12-21

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  SCHIESSLER S ,  TRONICH W

IPC: C09B67/20 ,  C09B67/14 ,  C09B67/16

Abstract: A process for the preparation of highly pure organic pigments which comprises converting organic dyestuffs having various degrees of purity into dyestuff salts capable of being isolated by means of suitable acids which dissolve the impurities contained in the dyestuff, separating them from the acid, recovering the dyestuffs in pure form from the dyestuff salts by the action of water and subjecting the isolated dyestuff in aqueous organic or aqueous-organic medium to a mechanical fine dispersion. By this process the dyestuff formed by the decomposition of the dyestuff sulfate is obtained in highly pure form and can extremely well be brought into a finely dispersed form so that it can be brought into pigment form already by short-time grinding. During the preparation and isolation of the dyestuff sulfate the sulfuric acid is obtained in such a high concentration that it can be regenerated in an economical manner and any ecological charge is avoided.