Process and apparatus for recovery of raw materials in the aspartame preparation process.

摘要

The invention relates to a process for the recovery of raw materials in the aspartame preparation process by use of a nanofiltration membrane process from aqueous process streams also containing dissolved salt by subjecting each of the aqueous process streams or a combination of two or more of such streams to nanofiltration with the aid of a composite membrane with specific retention for components above 100D and for monovalent salts, the raw materials present in the retentate so obtained being recovered by a manner known in the art or the retentate being returned to the aspartame preparation process without any further processing. The invention also relates to apparatus for carrying out that process.