GB1492137A - Process for concentrating halogenoanthraquinones - Google Patents

Process for concentrating halogenoanthraquinones

Info

Publication number
GB1492137A
GB1492137A GB4382075A GB4382075A GB1492137A GB 1492137 A GB1492137 A GB 1492137A GB 4382075 A GB4382075 A GB 4382075A GB 4382075 A GB4382075 A GB 4382075A GB 1492137 A GB1492137 A GB 1492137A
Authority
GB
United Kingdom
Prior art keywords
mixtures
halogenoanthraquinones
concentrating
vacuum
trihaloanthraquinone
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
GB4382075A
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.)
Bayer AG
Original Assignee
Bayer 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
Priority claimed from DE19742458022 external-priority patent/DE2458022C3/en
Priority claimed from DE19752531929 external-priority patent/DE2531929A1/en
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB1492137A publication Critical patent/GB1492137A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
    • B01D3/148—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step in combination with at least one evaporator

Landscapes

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

Abstract

By means of a single- or multi-stage fractional vacuum distillation, individual haloanthraquinones and/or binary di- and/or trihaloanthraquinone mixtures are concentrated from haloanthraquinone mixtures, after a possible removal of non-volatile impurities. In this process, the mixtures are preferably distilled in a heated rectifier column having an efficacy of 20 to 50 theoretical plates, under a vacuum of 5 to 25 mm Hg and at a reflux ratio of 5:1 to 50:1. By means of the process, important starting materials for dyestuff syntheses are made available again in high purity from hitherto worthless waste products.
GB4382075A 1974-12-07 1975-10-24 Process for concentrating halogenoanthraquinones Expired GB1492137A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742458022 DE2458022C3 (en) 1974-12-07 1974-12-07 Process for the production of pure chloranthraquinones
DE19752531929 DE2531929A1 (en) 1975-07-17 1975-07-17 Halo-anthraquinone purificn - by fractional distn under reduced pressure

Publications (1)

Publication Number Publication Date
GB1492137A true GB1492137A (en) 1977-11-16

Family

ID=25768077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4382075A Expired GB1492137A (en) 1974-12-07 1975-10-24 Process for concentrating halogenoanthraquinones

Country Status (14)

Country Link
JP (1) JPS591248B2 (en)
AT (1) AT340402B (en)
BR (1) BR7508056A (en)
CA (1) CA1068234A (en)
CH (1) CH619203A5 (en)
DD (1) DD124114A5 (en)
DK (1) DK551575A (en)
ES (1) ES443239A1 (en)
FR (1) FR2293412A1 (en)
GB (1) GB1492137A (en)
IT (1) IT1052516B (en)
LU (1) LU73943A1 (en)
NL (1) NL7514239A (en)
SU (1) SU598555A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543214A (en) * 1983-06-23 1985-09-24 Ciba-Geigy Ag Process for the preparation of bromoanthraquinones

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2637689C3 (en) * 1976-08-21 1980-09-25 Bayer Ag, 5090 Leverkusen Process for cleaning swelling organic products
CH628607A5 (en) * 1976-12-02 1982-03-15 Bayer Ag Process for preparing chloroanthraquinones
US4206130A (en) * 1977-05-10 1980-06-03 Bayer Aktiengesellschaft Process for the preparation of 1,5-dichloroanthraquinone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543214A (en) * 1983-06-23 1985-09-24 Ciba-Geigy Ag Process for the preparation of bromoanthraquinones

Also Published As

Publication number Publication date
AT340402B (en) 1977-12-12
CH619203A5 (en) 1980-09-15
DD124114A5 (en) 1977-02-02
IT1052516B (en) 1981-07-20
DK551575A (en) 1976-06-08
ATA927075A (en) 1977-04-15
BR7508056A (en) 1976-08-24
SU598555A3 (en) 1978-03-15
LU73943A1 (en) 1976-11-11
CA1068234A (en) 1979-12-18
FR2293412A1 (en) 1976-07-02
JPS591248B2 (en) 1984-01-11
ES443239A1 (en) 1977-09-16
FR2293412B1 (en) 1979-06-01
NL7514239A (en) 1976-06-09
JPS5182250A (en) 1976-07-19

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee