公开(公告)号：US3584064A

公开(公告)日：1971-06-08

申请号：US3584064D

申请日：1967-02-08

Applicant: BASF AG

Inventor： WEITZ HANS-MARTIN ,  HAUSDOERFER BERTHOLD ,  KOOPMANN JUERGEN

IPC: B01J10/00 ,  C07C17/02 ,  C07C21/14

CPC classification number: B01J10/00 ,  C07C17/02 ,  C07C21/14

Abstract: A PROCESS FOR THE CONTINUOUS PRODUCTION OF DIBROMOBUTENES BY THE REACTION OF BUTADIENE WITH BROMINE IN THE GAS PHASE, IN WHICH BUTADIENE IS USED IN MORE THAN DOUBLE THE STOICHIOMETRIC AMOUNT AND THE REACTANTS RE IN TURBULENT FLOW. DIBROMOBUTENES ARE INTERMEDIATES FOR POLYAMIDES OF THE NYLON-6,6 TYPE.

公开(公告)号：US3557187A

公开(公告)日：1971-01-19

申请号：US3557187D

申请日：1966-05-18

Applicant: BASF AG

Inventor： WEITZ HANS-MARTIN ,  MERGER FRANZ ,  KOOPMANN JUERGEN

IPC: B01J19/00 ,  C01B7/09 ,  C25B1/24 ,  C07C121/06

CPC classification number: C07C253/14 ,  B01J19/0086 ,  C01B7/096 ,  C25B1/24

Abstract: A PROCESS FOR PRODUCING 1,4-DICYANOBUTENE-(2) IN WHICH AT LEAST ONE OF THE COMPOUNDS 1,2-DIBROMOBUTENE(3) OR 1,4-DIBROMOBUTENE-(2) IS REACTED WITH HYDROCYANIC ACID IN THE PRESENCE OF A COPPER SALT CATALYST. THE PROCESS TAKES PLACE IN THE PRESENCE OF AN AQUEOUS ACID MEDIUM AND IN THE PRESENCE OF AN ACID ACCEPTOR. DURING THE REACTION A PH OF FROM -1TO +3 IS MAINTAINED. THE HYDROGEN BROMIDE THAT IS PRESENT IN THE REACTION SOLUTION IS OXIDIZED TO ELEMENTARY BROMINE AND THE AQUEOUS SOLUTION CONTAINING THE ACID ACCEPTOR IS RECYCLED TO THE REACTION MIXTURE. THE RATE OF REACTION OF THE PROCESS IS CONSIDERABLY HIGHER THAN THAT OF CONVENTIONAL METHODS AND LOWER YIELDS OF BY-PRODUCTS ARE ACHIEVED.