公开(公告)号：MY146487A

公开(公告)日：2012-08-15

申请号：MYPI20093610

申请日：2008-02-25

Applicant: BASF SE

Inventor： TILMAN SIRCH ,  MICHAEL STEININGER ,  STEFFEN MAAS ,  STEFAN RITTINGER ,  STEPHAN SCHLITTER

IPC: C07C45/72

Abstract: THE PREPARATION OF HYDROXYPIVALALDEHYDE IS EFFECTED BY ALDOLIZING ISOBUTYRALDEHYDE (ISO) WITH FORMALDEHYDE AND SUBSEQUENTLY WORKING UP THE RESULTING REACTION EFFLUENT BY DISTILLATION, WHEREIN THE REACTION EFFLUENT (A) IS FED TO A DISTILLATION COLUMN WHICH IS OPERATED AT A TOP PRESSURE IN THE RANGE FROM 0.05 TO 0.15 MPA (0.5 TO 1.5 BAR) AND IN WHICH A TWO-STAGE CONDENSATION IS PROVIDED IN THE TOP REGION, IN WHICH THE VAPORS ARE FIRST CONDUCTED INTO A PARTIAL CONDENSER OPERATED AT A TEMPERATURE IN THE RANGE FROM 50 TO 80°C, WHOSE CONDENSATE IS RECYCLED AT LEAST PARTLY INTO THE DISTILLATION COLUMN, AND IN WHICH THE VAPORS UNCONDENSED IN THE PARTIAL CONDENSER ARE FED TO A DOWNSTREAM CONDENSER OPERATED AT A TEMPERATURE IN THE RANGE FROM -40 TO +30°C, WHOSE CONDENSATE IS AT LEAST PARTLY DISCHARGED.