C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/109
C07D 501/46 (2006.01) C07D 501/12 (2006.01)
Patent
CA 1127150
ABSTRACT OF THE DISCLOSURE The specification describes a process for the recovery of cephaloridine from an aqueous solution in which it is pro- duced and in which it is present in quantities of from 20 to 100 g/l. The process includes salification of the cephaloridine by addition to the aqueous solution of an aqueous 1.5 M solution of an aromatic sulphonic acid chosen from para-toluenesulphonic acid and .beta.-napthalene sulphonic acid, the salification being carried out at a temperature of between 0°C and 40°C and at a pH of less than 5. The process further includes crystallisation by means of seeding with the cephaloridine salt at a pH of between 1.5 and 2, filtration, washing and drying of the crystalline cephaloridine salt obtained, decomposition of the crystalline cephaloridine salt to obtain a solution of betaine cephaloridine, crystallisation of the solution by means of seeding with betaine- form cephaloridine, and filtration, washing and drying of the crystalline betaine-form cephaloridine obtained.
340694
Macrae & Co.
Proter S.p.a.
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