公开(公告)号：US3585247A

公开(公告)日：1971-06-15

申请号：US3585247D

申请日：1968-07-30

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  GEHRMANN KLAUS ,  VIERTEL GUNTER

IPC: C07C17/25 ,  C07C17/38 ,  C07C21/09 ,  C07C21/04

CPC classification number: C07C17/25 ,  C07C17/383 ,  C07C17/392 ,  C07C21/09 ,  C07C19/01

Abstract: IMPROVEMENT IN OR MODIFICATION OF THE PROCESS DESCRIBED IN COPENDING APPLICATION SER. NO. 587,434, NOW U.S. PAT. NO. 3,413,365 COMPRISING WITHDRAWING RESULTING DICHLOROBUTENE MIXTURE AT A REFLUX RATION OF R=1 TO 20; WITHDRAWING THE COMPLETELY CONDENSED MATTER OR REFLUX MATTER NEAR THE COLUMN BASE; INTRODUCING SUCH MATTER INTO A CIRCULATION EVAPORATOR AND RECYCLING IT LATER IN VAPOR FORM FROM SAID EVAPORATOR INTO THE REACTOR; CONTINUOUSLY SUPPLYING THE SAID CIRCULATION EVAPORATOR WITH METERED QUANTITIES OF FRESH TETRACHLOROBUTANE-CONTAINING 1,2,3-TRICHLOROBUTANE COMING FROM A RSERVOIR, THE SAID TETRACHLOROBUTANECONTAINING 1,2,3-TRICHLOROBUTANE BEING SUPPLIED AT THE SAME RATE AS PRODUCED DICHLOROBUTENE MIXTURE IS WITHDRAWN FROM THE COLUMN; AND, ONCE THE 1,2,3-TRICHLOROBUTANE IN THE REACTOR IS FOUND TO CONTAIN ABOUT 30% BY WEIGHT TETRACHLOROBUTANE, INTRODUCING A PORTION OF THE REFLUX MATTER WITHDRAWN NEAR THE COLUMN BASE INTO A STIRRABLE COOLER; CENTRIFUGING THE 2,2,3,3-TETRACHLOROBUTANE, WHICH IS FOUND PARTIALLY TO CRYSTALLIZE IN THE SAID COOLER AT A TEMPERATURE OF 0*C., AND WITHDRAWING IT; AND RECYCLING MOTHER LIQUOR TO THE SAID CIRCULATION EVAPORATOR.

公开(公告)号：US3476776A

公开(公告)日：1969-11-04

申请号：US3476776D

申请日：1965-10-12

Applicant: KNAPSACK AG

Inventor： SENNEWALD KURT ,  ERPENBACH HEINZ ,  REHBERG HEINRICH ,  VIERTEL GUNTER

IPC: C07D301/14 ,  C07D1/08

CPC classification number: C07D301/14