GB446574A - Manufacture of a thiazine dyestuff - Google Patents

Manufacture of a thiazine dyestuff

Info

Publication number
GB446574A
GB446574A GB3064034A GB3064034A GB446574A GB 446574 A GB446574 A GB 446574A GB 3064034 A GB3064034 A GB 3064034A GB 3064034 A GB3064034 A GB 3064034A GB 446574 A GB446574 A GB 446574A
Authority
GB
United Kingdom
Prior art keywords
base
acid
aminodimethylaniline
toluidine
monomethyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3064034A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB3064034A priority Critical patent/GB446574A/en
Publication of GB446574A publication Critical patent/GB446574A/en
Expired legal-status Critical Current

Links

Landscapes

  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

A thiazine dye is prepared by oxidizing p-aminodimethylaniline thiosulphonic acid and monomethyl-o-toluidine to the indamine thiosulphonic acid, oxidizing this in the absence of zinc chloride to the thiazine dye, separating the latter in the absence of zinc chloride in the form of its base, and transforming this base to the hydrochloride. The product is particularly suitable for making hectograph inks. In an example, p-aminodimethylaniline thiosulphonic acid is oxidized with monomethyl-o-toluidine by means of sodium bichromate and sulphuric acid, copper sulphate added and temperature raised to 90 DEG C.; the dye-base is precipitated by adding caustic soda and converted to the hydrochloride. Specification 5268/96, [Class 2], is referred to.
GB3064034A 1934-10-25 1934-10-25 Manufacture of a thiazine dyestuff Expired GB446574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3064034A GB446574A (en) 1934-10-25 1934-10-25 Manufacture of a thiazine dyestuff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3064034A GB446574A (en) 1934-10-25 1934-10-25 Manufacture of a thiazine dyestuff

Publications (1)

Publication Number Publication Date
GB446574A true GB446574A (en) 1936-04-27

Family

ID=10310786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3064034A Expired GB446574A (en) 1934-10-25 1934-10-25 Manufacture of a thiazine dyestuff

Country Status (1)

Country Link
GB (1) GB446574A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748800A (en) * 1984-11-30 1988-06-07 Fuji Pack System Ltd. Wrapping machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748800A (en) * 1984-11-30 1988-06-07 Fuji Pack System Ltd. Wrapping machine

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