公开(公告)号：MY128539A

公开(公告)日：2007-02-28

申请号：MYPI20011715

申请日：2001-04-10

Applicant: BASF AG

Inventor： ECK BERN ,  BAUMANN DIETER ,  HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM DR

IPC: C07C51/43 ,  C07C51/47 ,  C07C57/07

Abstract: IN A PROCESS FOR THE PURIFICATION OF A CRUDE ACRYLIC ACID MELT, THE CRUDE ACRYLIC ACID MELT IS CONVERTED, UNDER THE ACTION OF LOW TEMPERATURES, INTO A CRUDE ACRYLIC ACID SUSPENSION CONSISTING OF ACRYLIC ACID CRYSTALS AND RESIDUAL MELT, AND THE ACRYLIC ACID CRYSTALS OF THE CRUDE ACRYLIC ACID SUSPENSION ARE FREED FROM REMAINING RESIDUAL MELT IN A WASH COLUMN, THE PRODUCTION OF THE ACRYLIC ACID CRYSTALS OF THE CRUDE ACRYLIC ACID SUSPENSION BEING CARRIED OUT IN THE PRESENCE OF WATER, THE WASH COLUMN BEING A WASH COLUMN WITH FORCED TRANSPORT OF THE ACRYLIC ACID CRYSTALS AND THE WASH LIQUID USED BEING THE MELT OF ACRYLIC ACID CRYSTALS PURIFIED IN THE WASH COLUMN.