Process for the continuous preparation of addition products of ethylene oxide to amines

Abstract

Abstract THIS INVENTION RELATES TO A PROCESS FOR THE CONTINUOUS PRODUCTION OF ETHOXYLATED AMINES BY (A) CONTINUOUSLY PASSING A MIXTURE OF (1) ORGANIC COMPOUNDS HAVING REACTIVE HYDROGEN ATOMS SELECTED FROM THE GROUP CONSISTING OF PRIMARY AMINES, SECONDARY AMINES, ADDITION PRODUCTS OF ETHYLENE OXIDE THEREOF, ADDITION PRODUCTS OF PROPYLENE OXIDE THEREOF AND ADDITION PRODUCTS OF BUTYLENE OXIDE THEREOF, WITH (2) ETHYLENE OXIDE IN A MOLAR RATIO OF 1:1 TO 1:6 UNDER A PRESSURE AT WHICH THE REACTION MIXTURE IS KEPT IN LIQUID FORM, THROUGH A JACKETED REACTOR HAVING A SMALL CROSS-SECTION COMPARED TO ITS LENGTH, (B) HEATING SAID MIXTURE TO SUCH A DEGREE THAT, AFTER TRAVELLING THROUGH THE FIRST HALF OF SAID JACKETED REACTOR, A MAXIMUM TEMPERATURE OF ABOUT 240*C. IS ATTAINED, AND THAT IN THE SECOND HALF OF SAID JACKETED REACTOR SAID MIXTURE PASSES THROUGH A MAXIMUM TEMPERATURE OF BETWEEN ABOUT 250* TO 360*C. (C) MAINTAINING SAID MIXTURE IN SAID JACKETED REACTOR FOR ABOUT 10 TO 150 SECONDS, (D) MAINTAINING THE INTERVAL BETWEEN THE OBTENTION OF SAID HIGHEST MAXIMUM TEMPERATURE AND THE TIME SAID MIXTURE LEAVES SAID JACKETED REACTOR BETWEEN ABOUT 5% TO 30% OF THE TOTAL DURATION OF TIME SAID MIXTURE IS MAINTAINED IN SAID JACKETED REACTOR, (E) COOLING SAID ADDITION PRODUCT TO A TEMPERATURE BELOW 150*C., IMMEDIATELY AFTER SAID ADDITION PRODUCT LEAVES SAID JACKETED REACTOR AND (F) RECOVERING SAID ADDITION PRODUCT. THE ETHOXYLATED AMINES SO PRODUCED ARE OBTAINED IN A PURER AND PRACTICALLY COLORLESS FORM AS COMPARED WITH PRIOR ART PROCESSES.

Inventors

• 👤 Werner Stein
• 👤 Wilfried Umbach

Bibliographic Details