公开(公告)号：DE19524181A1

公开(公告)日：1997-01-09

申请号：DE19524181

申请日：1995-07-03

Applicant: BASF AG

Inventor： FISCHER WOLFGANG DR ,  BAUMGAERTEL MICHAEL DR

IPC: B01J19/24 ,  C08F2/00 ,  C08F2/02 ,  C08F2/04 ,  C08F212/00 ,  C08F212/08 ,  C08F220/44

Abstract: Continuous prodn. of polymers (I), esp. copolymers of styrene (S) and acrylonitrile (AN), by bulk or soln. polymerisation. The process comprises passing the reaction components through a loop reactor which contains at least one tubular reactor (1) contg. static mixer element(s) through which a liq. heat transfer medium flows. Also claimed is an appts. for this process, as described above. Pref. the monomer mixt. contains (a) vinylaromatic monomer(s) and (b) (meth)acrylonitrile, (1-8C alkyl) (meth)acrylate and/or maleic anhydride; pref. (a) is styrene, alpha -methylstyrene and/or p-methylstyrene. Suitable solvents for soln. polymerisation are 6-12C aromatic hydrocarbons, pref. benzene, toluene, ethyltoluene or ethylbenzene, in amts. of 1-25 (pref. 2-18) wt% to 100 wt% monomer mixt., together with up to 5 wt% water. The mixt. leaving the reactor is subjected to single- or multi-stage evapn. to reduce the content of volatiles to less than 1 (pref. less than 0.5) wt% w.r.t. polymer, and the volatile components are pref. condensed and recirculated to the reactor. The reactor is operated at 50-230 (pref. 50-180) degrees C and 0.1-100 (pref. 0.5-75) bar, and/or the mean dwell time of monomers in the reaction mass is 20-420 (pref. 45-300) mins., and/or the flow rate of the reaction medium in the tube reactor is 0.5-20 (pref. 2-15) cm/sec..

公开(公告)号：DE19524180A1

公开(公告)日：1997-01-09

申请号：DE19524180

申请日：1995-07-03

Applicant: BASF AG

Inventor： FISCHER WOLFGANG DR ,  BAUMGAERTEL MICHAEL DR

IPC: B01J19/24 ,  C08F2/00 ,  C08F2/02 ,  C08F2/04 ,  C08F2/06 ,  C08F212/10 ,  C08F212/08 ,  C08F220/44

Abstract: A process for the continuous prodn. of polymers (I), esp. copolymers of styrene (S) and acrylonitrile (AN), by bulk or soln. polymerisation. The process comprises passing the reaction components through a loop reactor which contains at least one bank of tubes in thermal contact with a liq. heat transfer medium (II) and which is connected with at least one static mixer element. Also claimed is an appts. for this process