CAS: 11096-82-5; 2,2',3,3',4,4'-Pcb

专利信息

专利号:US-5243032-A
优先权日:1989-06-22
标题:Preparation of azo pigments with low pcb content by coupling in the presence of olefins
发明人：RIEPER WOLFGANG
权利人:HOECHST AG
摘要:The production which is customary in practice of monoazo compounds based on dichloro- and trichloroanilines or disazo compounds of the chlorinated biphenyl series by conventional coupling methods meets with difficulties in that the resulting pigments are contaminated by traces of polychlorinated biphenyls. n According to the invention, it has now been found that by addition of water-soluble olefins of the type ##STR1## (R =H, alk or Oalk; X =--COOR 1 , --CONHR 2 or --NR 3 COR 4 ) n in the azo coupling, the side reactions which form PCBs can be decidedly suppressed during synthesis of the pigments.

专利号:US-4618686-A
优先权日:1984-09-27
标 题 :Process for dehalogenation of aryl and alpha-araliphatic halides
发明人：BOYER STEPHEN K
权利人:CIBA GEIGY CORP
摘要:Process for the dehalogenation of aryl and alpha-araliphatic halides comprising contacting the aryl halide or alpha-araliphatic halide with hypophosphite salt, in the presence of a catalytic amount of a noble metal catalyst. This process is useful in the field of organic synthesis and for the removal of environmentally hazardous aryl and alpha-araliphatic halides, including polychlorinated biphenyls and dibenzo-p-dioxins.

专利号:CN-107759637-A
优先权日:2017-11-16
标 题 :Catalyst for fluorination reaction of phosphazene and phosphazene derivatives and synthesis method of fluoride thereof