Global patent index - EP 0993443 A1

EP 0993443 A1 2000-04-19 - METHOD FOR PRODUCING 4,4' DIHALOGENDIPHENYLSULFONE

Title (en)

METHOD FOR PRODUCING 4,4' DIHALOGENDIPHENYLSULFONE

Title (de)

VERFAHREN ZUR HERSTELLUNG VON 4,4'-DIHALOGENDIPHENYLSULFON

Title (fr)

PROCEDE DE FABRICATION DE 4,4'-DIHALOGENODIPHENYLSULFONE

Publication

EP 0993443 A1 (DE)

Application

EP 98934947 A

Priority

  • DE 19726806 A
  • DE 19726805 A
  • DE 19726807 A
  • EP 9803507 W

Abstract (en)

[origin: WO9858907A1] The invention relates to a method for producing 4,4'-dihalogendiphenylsulfone by reacting halogenated benzene with 4-halogenphenylsulfonyl chloride in a liquid phase at high temperature, in the presence of a solid catalyst having acid centers. The method is characterized in that the reaction of 4-halogenphenylsulfonyl chloride with formula (I), in which X is chlorine, bromine or fluorine, with chlorobenzene, bromobenzene, or fluorobenzene, is carried out in the presence of a catalyst which is selected from one of the following groups: K1) catalysts consisting of essentially stratified silicates not having Lewis acids and having proton-saturated negative layer loads, or containing these as a basic component; K2) catalysts consisting of zeolites in the acid H form, or containing these as a basic component; and K3) catalysts consisting of mixed oxides having acidic centres, or containing these as basic components. The mixed oxides consist of a combination of (a) titanium, circonium, hafnium, tin, iron or Cr(III) oxides on the one hand, and (b) vanadium, chromium(VI), molybdenum, wolfram or scandium oxides on the other hand; or the mixed oxides are sulfatized or phosphatized oxides of the group (a), and said mixed oxides are calcined after combination, at temperatures of 450 to 800 DEG C.

IPC 1-7 (main, further and additional classification)

C07C 317/14

IPC 8 full level (invention and additional information)

B01J 21/16 (2006.01); B01J 23/28 (2006.01); B01J 23/30 (2006.01); B01J 23/888 (2006.01); B01J 23/889 (2006.01); C07C 315/00 (2006.01); C07C 317/14 (2006.01)

CPC (invention and additional information)

B01J 23/8892 (2013.01); B01J 21/16 (2013.01); B01J 23/28 (2013.01); B01J 23/30 (2013.01); B01J 23/888 (2013.01); C07C 315/00 (2013.01)

Combination set (CPC)

C07C 315/00 + C07C 317/14

Citation (search report)

See references of WO 9858907A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL

EPO simple patent family

WO 9858907 A1 19981230; AU 8437998 A 19990104; CA 2283894 A1 19981230; EP 0993443 A1 20000419; KR 20010020308 A 20010315

INPADOC legal status

2001-07-04 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20001231

2000-04-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990904

2000-04-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE ES FR GB IT NL