GB202632A - - Google Patents

Info

Publication number
GB202632A
GB202632A GB20488/23A GB2048823A GB202632A GB 202632 A GB202632 A GB 202632A GB 20488/23 A GB20488/23 A GB 20488/23A GB 2048823 A GB2048823 A GB 2048823A GB 202632 A GB202632 A GB 202632A
Authority
GB
United Kingdom
Prior art keywords
sulphuric
acid
anhydride
leuco
fuming
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
GB20488/23A
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.)
Durand and Huguenin AG
Original Assignee
Durand and Huguenin 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 Durand and Huguenin AG filed Critical Durand and Huguenin AG
Publication of GB202632A publication Critical patent/GB202632A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B9/00Esters or ester-salts of leuco compounds of vat dyestuffs

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In the processes described in the parent Specification and Specification 202,630 for the production of ethereal salts of leuco vat-dyes, the chlorsulphonic acid or chlorsulphonate employed is replaced by fuming sulphuric acid or sulphuric anhydride. Examples are given in which leuco indigo is treated with fuming sulphuric acid, or sulphuric anhydride, in presence of dimethylaniline and chlorbenzene, air being excluded.
GB20488/23A 1922-08-21 1923-08-11 Expired GB202632A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202632T 1922-08-21

Publications (1)

Publication Number Publication Date
GB202632A true GB202632A (en) 1924-03-06

Family

ID=31893052

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20488/23A Expired GB202632A (en) 1922-08-21 1923-08-11

Country Status (1)

Country Link
GB (1) GB202632A (en)

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