Title:
染料、顔料製造に使用されるカルボキシ金属フタロシアニンの製造プロセス
Document Type and Number:
Japanese Patent JP7411028
Kind Code:
B2
Abstract:
The present invention patent application relates to a novel process for producing carboxy metallo-phthalocyanines that can be used for producing dyes and pigments for the textile industry, inter alia, which is more efficient in producing said molecule, with a lower cost and an extremely low waste production level; the process in question comprises five steps, wherein the first step is that of a cyclization reaction and formation of the intermediate iron tetraimidophthalocyanine (TI-FePc) with a yield of approximately 35%; the second step is that of purifying the insoluble TI-FePc using a solution of HCl recovered in the fifth step; the third step is the step of a basic hydrolysis reaction using the solution recovered in the fourth step, generating the intermediate iron octacarboxyphthalocyanine (OC-FePc); the fourth step is the step of precipitating with calcium ions, separating the CaOC-FePc pigment and recovering the NaOH solution reused in the third step; and the fifth step is the step of acidification using hydrochloric acid and conversion of CaOC-FePc into the product HOC-FePc and recovery of the acid solution for reuse in the second and fifth steps.
Inventors:
Matthias, Tiago Araujo
Nagao Kobayashi
Araki, Koichi
Nagao Kobayashi
Araki, Koichi
Application Number:
JP2022117995A
Publication Date:
January 10, 2024
Filing Date:
July 25, 2022
Export Citation:
Assignee:
GOLDEN TECHNOLOGY LTD.
Universidad de Sao Paulo - USP
Universidad de Sao Paulo - USP
International Classes:
C09B67/20; C09B47/24
Domestic Patent References:
| JP10101673A | ||||
| JP3195778A | ||||
| JP62111985A | ||||
| JP53005329B1 |
Foreign References:
| WO2014175077A1 | ||||
| US6508873 |
Attorney, Agent or Firm:
Patent Attorney Corporation Wisdom International Patent and Trademark Office