초록 ▼

Improved separation of feed streams containing multiple components is effected by means of a multi membrane staged pervaporation process wherein each membrane stage is series is run as progressively higher temperature, stronger vacuum or both than the preceding stage. This process is especially usef

Improved separation of feed streams containing multiple components is effected by means of a multi membrane staged pervaporation process wherein each membrane stage is series is run as progressively higher temperature, stronger vacuum or both than the preceding stage. This process is especially useful for separating components from wide boiling range mixtures.

대표청구항 ▼

A process for separating a multi-component feed stream into fractions of different molecular type and of different boiling point comprising feeding the multi-component feed stream to a multi-stage membrane pervaporation separation unit, the multi-component stream being the feed to a first separation

A process for separating a multi-component feed stream into fractions of different molecular type and of different boiling point comprising feeding the multi-component feed stream to a multi-stage membrane pervaporation separation unit, the multi-component stream being the feed to a first separation stage producing a permeate and a retentate, the retentate from the first and each succeeding stage in turn being the feed to the next succeeding separation stage wherein the retentate which constitutes the feed to the next succeeding stage is heated to a temperature higher than that used in the preceding stage and wherein each succeeding permeation stage is run at a higher vacuum than that used in the preceding permeation stage to thereby fractionate the multi-component stream into numerous fractions of different molecular type and different boiling point.