ES459328A1 - Isolation of epsilon-caprolactam - Google Patents

Isolation of epsilon-caprolactam

Info

Publication number
ES459328A1
ES459328A1 ES459328A ES459328A ES459328A1 ES 459328 A1 ES459328 A1 ES 459328A1 ES 459328 A ES459328 A ES 459328A ES 459328 A ES459328 A ES 459328A ES 459328 A1 ES459328 A1 ES 459328A1
Authority
ES
Spain
Prior art keywords
caprolactam
epsilon
isolation
toluene
lactam
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
ES459328A
Other languages
Spanish (es)
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 ES459328A1 publication Critical patent/ES459328A1/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

Process for purifying epsilon -caprolactam by extraction and recrystallisation, wherein a crude lactam is extracted with toluene and recrystallised from toluene. The process is particularly simple to carry out continuously with high yield without distillation to obtain ultrapure lactam.
ES459328A 1976-06-05 1977-05-31 Isolation of epsilon-caprolactam Expired ES459328A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762625402 DE2625402A1 (en) 1976-06-05 1976-06-05 CLEANING EPSILON CAPROLACTAM

Publications (1)

Publication Number Publication Date
ES459328A1 true ES459328A1 (en) 1978-03-16

Family

ID=5979933

Family Applications (1)

Application Number Title Priority Date Filing Date
ES459328A Expired ES459328A1 (en) 1976-06-05 1977-05-31 Isolation of epsilon-caprolactam

Country Status (10)

Country Link
JP (1) JPS52151186A (en)
BE (1) BE855367A (en)
BR (1) BR7703572A (en)
CH (1) CH626339A5 (en)
DD (1) DD132491A5 (en)
DE (1) DE2625402A1 (en)
ES (1) ES459328A1 (en)
FR (1) FR2353535A1 (en)
GB (1) GB1535485A (en)
NL (1) NL7706080A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2845075A1 (en) * 1978-10-17 1980-05-08 Basf Ag METHOD FOR PURIFYING ROHCAPROLACTAM
CN115253380B (en) * 2022-08-19 2023-09-01 清元智能科技研究院(湖北)有限公司 Caprolactam extraction system and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH522649A (en) * 1970-04-17 1973-04-13 Buchs Metallwerk Ag Caprolactam purification - by solvent extn and crystallisation using same solvent
SU387996A1 (en) * 1971-04-30 1973-06-22 METHOD OF CLEANING CAPROLACTAM
CH564528A5 (en) * 1972-06-14 1975-07-31 Buchs Metallwerk Ag Purification of caprolactam freed from water - by counter-current multi-stage cystallisation from the melt using a solvent

Also Published As

Publication number Publication date
GB1535485A (en) 1978-12-13
DE2625402A1 (en) 1977-12-22
FR2353535A1 (en) 1977-12-30
NL7706080A (en) 1977-12-07
BE855367A (en) 1977-12-05
BR7703572A (en) 1978-03-21
CH626339A5 (en) 1981-11-13
FR2353535B1 (en) 1982-07-02
JPS52151186A (en) 1977-12-15
DD132491A5 (en) 1978-10-04

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990601