Liquid-liquid extraction process for the production of acrylic esters

摘要

The invention relates to a liquid-liquid extraction process, comprising:
the provision of a main input liquid stream, comprising at least one compound of interest and an excess compound;the provision of a liquid scrubbing stream;the extraction of the excess compound from the main input liquid stream by contact with the liquid scrubbing stream, making it possible to collect a main output liquid stream, depleted in excess compound with respect to the main input liquid stream;

in which:
the main input liquid stream and the liquid scrubbing stream exhibit a difference in density of less than or equal to 50 kg/m3 and also an interfacial tension of less than or equal to 3 dyn/cm; andthe extraction stage is carried out in a packed contactor with a ratio by weight as input liquid scrubbing stream/main liquid stream ranging from 0.3 to 0.5.;The invention also relates to a process for the production of acrylic ester in which the production stream is treated by means of the above liquid-liquid extraction process.

主权项

1. A liquid liquid extraction process, comprising the steps of:
providing a main input liquid stream, comprising at least acrylic ester and an excess compound which is an alcohol; providing a liquid scrubbing stream which is an aqueous stream; extracting alcohol from the main input liquid stream by contact with the liquid scrubbing stream, thereby collecting a main output liquid stream, depleted in alcohol with respect to the main input liquid stream; wherein: the main input liquid stream and the liquid scrubbing stream exhibit a difference in density of less than or equal to 50 kg/m3 and an interfacial tension of less than or equal to 3 dyn/cm; and the extraction stage is carried out in a packed contactor having packing components with a specific surface greater than or equal to 200 m2/m3 and with a ratio by weight as input liquid scrubbing stream/main liquid stream ranging from 0.3 to 0.5.