PROCESS FOR PREPARING UNSATURATED CARBOXYLIC ESTERS

摘要

A PROCESS FOR PREPARING UNSATURATED CARBOXYLIC ESTERS INCLUDES REACTION OF ALKENES HAVING 2 TO 6 CARBON ATOMS WITH ALKANECARBOXYLIC ACIDS HAVING 1 TO 6 CARBON ATOMS IN THE PRESENCE OF AN OXYGENOUS GAS AND IN THE PRESENCE OF A HETEROGENEOUS NOBLE METAL CATALYST BY MEANS OF A CONTINUOUS HOMOGENEOUS GAS PHASE PROCESS IN A REACTOR. A GASEOUS PHASE (CYCLE GAS) IS CIRCULATED, AND THE CYCLE GAS IS LADEN WITH ALKANECARBOXYLIC ACID IN AN ACID SATURATOR (7) BEFORE ENTRY INTO THE REACTOR. IN A PRESATURATOR (1) CONNECTED UPSTREAM OF THE ACID SATURATOR (7), THE CYCLE GAS IS LADEN WITH A PORTION OF THE AMOUNT OF ALKANECARBOXYLIC ACID USED FOR SATURATION, AND THEN IT IS TRANSFERRED TO THE ACID SATURATOR (7) AND LADEN THERE WITH THE REMAINING AMOUNT OF ALKANECARBOXYLIC ACID. (SOLE