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Expired
Application number
GB2613563A
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Mitsubishi Kasei Corp
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Mitsubishi Kasei Corp
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Publication of GB1031907ApublicationCriticalpatent/GB1031907A/en
C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
C07D201/02—Preparation of lactams
C07D201/10—Preparation of lactams from cycloaliphatic compounds by simultaneous nitrosylation and rearrangement
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Abstract
Caprolactam is prepared by reacting hexahydrobenzoic acid with nitrosyl-chloroanhydrosulphate at a temperature of - 20 DEG to 200 DEG C. The molar ratio of nitrosyl-chloroanhydro-sulphate to hexahydrobenzoic acid may be 1: 0.5-8, preferably 1: 0.6-1.5. The reaction may be carried out in the presence of a small quantity, usually 0.05 to 5.0 mols. per mole of nitrosyl-chloroanhydrosulphate, of an inorganic acid or anhydride thereof or a sulphonic acid.
GB2613563A1962-07-021963-07-02Method of manufacturing caprolactam
ExpiredGB1031907A
(en)