Process for separating solvents used in the purification of prod

Details Process for separating solvents used in the purification of prod Process for separating solvents used in the purification of prod

1989-07-14

1991-01-15

Jones, W. Gary

Liquid purification or separation

Processes

Separating

210770, 210772, 210783, 210806, 536 85, 536111, B01D 1102

Patent

active

049851527

ABSTRACT:
The present invention relates to a process and a device for selectively separating the solvents employed in the preparation and purification of products. In this connection the different solvents are removed from the product to be treated by means of mechanical separation and subsequent admission of steam, and are collected separately. As a result of this, mixing of solvents from the preparation and from the purification is avoided, so that the working up of a solvent mixture is superfluous. The proces and the device are preferably used in the process for producing starch ethers and cellulose ethers.

REFERENCES:
patent: 4250306 (1981-02-01), Lask et al.
patent: 4398024 (1983-08-01), Bernert et al.
patent: 4404370 (1983-09-01), Bernert et al.
A. A. J. A. Prinssen, "Vacuum Belt Filters", Filtration and Separation, Mar./Apr. 1979, pp. 176-180.

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