GB1529559A - Purification of caprolactam - Google Patents

Purification of caprolactam

Info

Publication number
GB1529559A
GB1529559A GB3810777A GB3810777A GB1529559A GB 1529559 A GB1529559 A GB 1529559A GB 3810777 A GB3810777 A GB 3810777A GB 3810777 A GB3810777 A GB 3810777A GB 1529559 A GB1529559 A GB 1529559A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
purification
sept
potassium permanganate
impure
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
GB3810777A
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
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB1529559A publication Critical patent/GB1529559A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/16—Separation or purification

Abstract

1529559 Purification of caprolactam BAYER AG 13 Sept 1977 [15 Sept 1976] 38107/77 Heading C2C The invention comprises a process for the purification of #-caprolactam wherein impure #-caprolactam is treated with potassium permanganate in the presence of from 0À01 to 5% by weight of water, based on the #-caprolactam and subsequently crystallized from toluene, benzene, ethylbenzene or xylene. The quantity of potassium permanganate is preferably controlled so that it is completely reduced in 5 minutes at a temperature of 80‹ C.
GB3810777A 1976-09-15 1977-09-13 Purification of caprolactam Expired GB1529559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762641478 DE2641478A1 (en) 1976-09-15 1976-09-15 CLEANING CAPROLACTAM

Publications (1)

Publication Number Publication Date
GB1529559A true GB1529559A (en) 1978-10-25

Family

ID=5987958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3810777A Expired GB1529559A (en) 1976-09-15 1977-09-13 Purification of caprolactam

Country Status (9)

Country Link
JP (1) JPS5337687A (en)
BE (1) BE858713A (en)
BR (1) BR7706142A (en)
DD (1) DD132128A5 (en)
DE (1) DE2641478A1 (en)
ES (1) ES462353A1 (en)
FR (1) FR2364905A1 (en)
GB (1) GB1529559A (en)
NL (1) NL7710151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248781A (en) * 1978-10-17 1981-02-03 Basf Aktiengesellschaft Purification of crude caprolactam

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW215084B (en) * 1992-04-17 1993-10-21 Sumitomo Chemical Co Process for producing a high purity caprolactam

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1397132A (en) * 1963-05-22 1965-04-30 Halcon International Inc Chemical process for the purification of lactams
FR1445047A (en) * 1964-08-18 1966-07-08 Zimmer Verfahrenstechnik Process for the purification of caprolactam by oxidation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248781A (en) * 1978-10-17 1981-02-03 Basf Aktiengesellschaft Purification of crude caprolactam

Also Published As

Publication number Publication date
DD132128A5 (en) 1978-08-30
FR2364905A1 (en) 1978-04-14
BE858713A (en) 1978-03-15
FR2364905B1 (en) 1981-11-27
DE2641478A1 (en) 1978-03-23
BR7706142A (en) 1978-07-04
NL7710151A (en) 1978-03-17
ES462353A1 (en) 1978-06-16
JPS5337687A (en) 1978-04-06

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Legal Events

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