GB297366A - Improvements in and relating to the production of dyestuff intermediates - Google Patents

Improvements in and relating to the production of dyestuff intermediates

Info

Publication number
GB297366A
GB297366A GB758327A GB758327A GB297366A GB 297366 A GB297366 A GB 297366A GB 758327 A GB758327 A GB 758327A GB 758327 A GB758327 A GB 758327A GB 297366 A GB297366 A GB 297366A
Authority
GB
United Kingdom
Prior art keywords
oxide
alkaline
alkali
carbonate
employed
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
GB758327A
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.)
IAN BLOHM ANDERSON
ROBERT FRASER THOMSON
Scottish Dyes Ltd
Original Assignee
IAN BLOHM ANDERSON
ROBERT FRASER THOMSON
Scottish Dyes Ltd
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 IAN BLOHM ANDERSON, ROBERT FRASER THOMSON, Scottish Dyes Ltd filed Critical IAN BLOHM ANDERSON
Priority to GB758327A priority Critical patent/GB297366A/en
Publication of GB297366A publication Critical patent/GB297366A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/54—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings condensed with carbocyclic rings or ring systems

Landscapes

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

Abstract

297,366. Anderson, I. B., Thomson, R. F., Thomas, J., and Scottish Dyes, Ltd. March 18, 1927. Pyrazoleanthrones are prepared by condensation of a-halogenanthraquinones with hydrazine or its salts in the presence of an oxide, hydroxide, or carbonate of an alkali or alkaline-earth metal, or an alkali salt of a weak volatile organic acid; the reagents may be employed in a dry state or in the presence of limited amounts of water; the process is effected at high temperatures and under pressure or not. Quicklime, calcium hydroxide, a paste of lime and water, sodium carbonate, calcium carbonate, sodium acetate, barium oxide, or strontium oxide, or mixtures thereof, are specified as alkaline reagents. When alkali salts of organic acids are used, the liberated organic acid may be allowed to escape or may be fixed by addition of a base. Examples are given of the preparation of pyrazoleanthrone and 2-methylpyrazoleanthrone from 1-chloranthraquinone and 1-chlor-2-methylanthraquinone respectively. Anthraquinone-alpha-hydrazines are obtained as intermediate products in the above process and may be isolated when a reduced quantity of alkaline-earth oxide is employed; an example is given of the preparation of 1-hydrazinoanthraquinone.
GB758327A 1927-03-18 1927-03-18 Improvements in and relating to the production of dyestuff intermediates Expired GB297366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB758327A GB297366A (en) 1927-03-18 1927-03-18 Improvements in and relating to the production of dyestuff intermediates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB758327A GB297366A (en) 1927-03-18 1927-03-18 Improvements in and relating to the production of dyestuff intermediates

Publications (1)

Publication Number Publication Date
GB297366A true GB297366A (en) 1928-09-18

Family

ID=9835919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB758327A Expired GB297366A (en) 1927-03-18 1927-03-18 Improvements in and relating to the production of dyestuff intermediates

Country Status (1)

Country Link
GB (1) GB297366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401915A1 (en) * 1977-09-02 1979-03-30 Ciba Geigy Ag PROCESS FOR THE PREPARATION OF PYRAZOLANTHRONES CARRYING A SUBSTITUTE IN POSITION 3

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401915A1 (en) * 1977-09-02 1979-03-30 Ciba Geigy Ag PROCESS FOR THE PREPARATION OF PYRAZOLANTHRONES CARRYING A SUBSTITUTE IN POSITION 3

Similar Documents

Publication Publication Date Title
GB399753A (en) Manufacture of solid stable diazo-azo-salts
GB297366A (en) Improvements in and relating to the production of dyestuff intermediates
US2639274A (en) Sulfonated phenol formaldehyde condensation product and method for making same
GB573589A (en) Improvements in or relating to the manufacture of alginic materials
GB460376A (en) Improvements in or relating to the production of chlorine dioxide
SU67258A1 (en) The method of obtaining green pigment
GB932523A (en) Process for the production of lead hydroxide oxide of the formula 5 pbo.2ho
GB553317A (en) Improvements in the production of alkaline earth metal pantothenates
GB181575A (en) Manufacture of new artificial resin products
GB340534A (en) Manufacture of improved preparations useful for the production of dyestuffs
GB414497A (en) Improvements in or relating to the manufacture of caustic alkalis
GB592682A (en) Process of transforming vanillin to vanillic acid
GB642459A (en) Improvements in or relating to organic oxidation reactions
GB647209A (en) 4-substituted-1-amino-ar-tetrahydro-2-naphthols
GB657815A (en) Improvements relating to metal soaps
GB373511A (en) A process for the dehydration of water-containing alkali hydroxides
GB736816A (en) A new trypanocidal substance and its acid addition salts
GB679108A (en) Process for the preparation of a double chromate of an alkaline earth metal and an alkali metal
GB564576A (en) Improvements in and relating to resinous condensation products
GB363936A (en) Improvements in a process for manufacturing barium sulphate of definite granule size
GB608922A (en) A process for manufacturing a product soluble in water from natural rubber, gutta percha, balata and other natural rubber-like products
GB489236A (en) Improvements in the manufacture and production of naphthalene derivatives
GB191363A (en) Process for manufacturing dioxyperylene
GB625098A (en) Improvements in or relating to the production of trifluoroacetic acid
GB468157A (en) Improvements in and relating to the preparation of complex iron compounds