GB923302A - Improvements in and relating to the production of lactams - Google Patents

Improvements in and relating to the production of lactams

Info

Publication number
GB923302A
GB923302A GB370262D GB370262D GB923302A GB 923302 A GB923302 A GB 923302A GB 370262 D GB370262 D GB 370262D GB 370262 D GB370262 D GB 370262D GB 923302 A GB923302 A GB 923302A
Authority
GB
United Kingdom
Prior art keywords
lactams
oxime
relating
production
sulphuric acid
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
GB370262D
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.)
Commercial Solvents Corp
Original Assignee
Commercial Solvents Corp
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 Commercial Solvents Corp filed Critical Commercial Solvents Corp
Publication of GB923302A publication Critical patent/GB923302A/en
Expired legal-status Critical Current

Links

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  • Other In-Based Heterocyclic Compounds (AREA)
  • Cephalosporin Compounds (AREA)

Abstract

In the preparation of lactams by the Beckmann rearrangement of cyclic ketoximes, the oxime in molten form is continuously mixed with sulphuric acid of at least 99% concentration in a ratio of 1 mol of oxime to 1 to 3 moles of acid, and the mixture maintained at 70-200 DEG C., and reaction mixture is continuously withdrawn from the vessel at a rate so as to maintain a residence time of 10-30 minutes. The sulphuric acid may contain free SO3, e.g. 1 to 10% by weight.
GB370262D 1959-05-13 1960-05-05 Improvements in and relating to the production of lactams Expired GB923302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81278659A 1959-05-13 1959-05-13

Publications (1)

Publication Number Publication Date
GB923302A true GB923302A (en) 1963-04-10

Family

ID=25210619

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1599160A Expired GB923301A (en) 1959-05-13 1960-05-05 Improvements in and relating to the production of lactams
GB370262D Expired GB923302A (en) 1959-05-13 1960-05-05 Improvements in and relating to the production of lactams

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1599160A Expired GB923301A (en) 1959-05-13 1960-05-05 Improvements in and relating to the production of lactams

Country Status (2)

Country Link
CH (1) CH391708A (en)
GB (2) GB923301A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2417501A1 (en) * 1978-02-17 1979-09-14 Ato Chimie PROCESS FOR PREPARING MILK BY ISOMERIZATION OF OXIMES IN A SULFURIC MEDIUM

Also Published As

Publication number Publication date
CH391708A (en) 1965-05-15
GB923301A (en) 1963-04-10

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