SU94902A1 - Method for continuous extraction with benzene vanillin from aqueous-alcoholic solutions - Google Patents

Description

In the production of vanillin by the nitrous method in the stage of condensation of gba cola with formaldehyde and further OE extract, dilute water-borne solutions of vanillin are obtained, from which Ijbix is extracted with benzene.

11process1: extraction in non-periodically operating anaparata maloneproducible, coagulated using a large amount of benzene and bulky instrumentation.

The proposed method significantly accelerates benzene extraction of vanillin from water-SP of industrial solutions and will give the opportunity to work with smaller amounts of benzene.

The method consists in the following.

Aqueous-alcoholic pacTiop vanillin is continuously fed from above into the nolut column without packing. Benzene lars, which condense in the form of small droplets in the column, also continuously flow from below into the column.

The resulting small droplets of benzene are evenly distributed throughout the volume of the column, create a large surface of contact with the aqueous-alcoholic solution of vanillin and, as they rise, are removed from the solution of wahni. T1IN.

With the proper speeds of the continuous phase (vanillin solution) and disnerg phase (benzene), as well as the active height 1; about.

Nor, Ke, is a table of eight experiments of continuous L1; etraccin vanillin.

Continued;

1metdmet of the invention. Method for the continuous extraction of benzo-iOM 1; shilina from aqueous hydrochloric acid solution OO, o tl and h; i si and with the fact that ex4, 19

6.4

1.01

1.24

57 Trakdy is carried out in a column without nozzles of a non-continuous metropus with no oenzol vapor through a continuous IacTisop vanillin dispenser.