초록 ▼

In the recovery and purification of methacrylic acid or its esters produced by the vapor phase catalytic oxydehydrogenation of isobutyric acid or its esters the problem of downstream plugging is avoided by the inclusion of a small amount of surfactant in the gaseous effluent at or near the point of

In the recovery and purification of methacrylic acid or its esters produced by the vapor phase catalytic oxydehydrogenation of isobutyric acid or its esters the problem of downstream plugging is avoided by the inclusion of a small amount of surfactant in the gaseous effluent at or near the point of its condensation.

대표청구항 ▼

In a process for the vapor phase catalytic oxydehydrogenation of isobutyric acid or its esters to form methacrylic acid or its esters wherein the gaseous product is condensed and purified, the improvement consisting of adding to the gaseous product at or about the point of its condensation from 1 to

In a process for the vapor phase catalytic oxydehydrogenation of isobutyric acid or its esters to form methacrylic acid or its esters wherein the gaseous product is condensed and purified, the improvement consisting of adding to the gaseous product at or about the point of its condensation from 1 to 6000 ppm of a surfactant material selected from the group consisting of an anionic a cationic and a non-ionic surfactant.