(19)
(11) EP 0 114 110 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.01.1985 Bulletin 1985/04

(43) Date of publication A2:
25.07.1984 Bulletin 1984/30

(21) Application number: 84300226

(22) Date of filing: 13.01.1984
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL SE

(30) Priority: 14.01.1983 GB 8300956

(71) Applicant: AARQUE SYSTEMS LIMITED
 ()

(72) Inventors:
  • Bailoor, Shashikant Dattatraya
     ()
  • White, John Edwin
     ()

   


(54) Diazo developer absorption apparatus


(57) Apparatus for removing ammonia or other alkaline diazo developer from copier exhaust gas, uses a packed column (5) through which the air passes, while acid solution as absorbing liquid is continuously circulated in countercurrent until the acid solution in the reservoir (21, 24) becomes exhausted, and is replaced. A multistage fan (1) is employed to drive the air against the back pressure produced by the packed column (5). The apparatus can treat the exhaust air from a high throughput copier and is surprisingly free from clogging by salts evaporated from the absorber solution.






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