Process for the treatment of aqueous crude effluent liquors from coal carbonizing plants

• US 3,278,423 A
• Filed: 09/17/1964
• Issued: 10/11/1966
• Est. Priority Date: 09/17/1963
• Status: Expired due to Term

• Current Assignee: Courtney Millar Jan Michael
• Original Assignee: Courtney Millar Jan Michael
• Inventors: COURTNEY MILLAR JAN MICHAEL
• Application Number:
  US04/397,241
• Time in Patent Office: 754 Days
• US Class Current: 210/626
• CPC Class Codes: C01C 1/10 Separation of ammonia from ammonia liquors, e.g. gas liquors as part of the ammonia synthesis process C01C1/04
• CPC Class Codes: C02F 1/20 by degassing, i.e. liberation of dissolved gases degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/5236 using inorganic agents
• CPC Class Codes: C02F 1/66 by neutralisation; pH adjustment for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58
• CPC Class Codes: C02F 3/1231 Treatments of toxic sewage
• CPC Class Codes: C02F 9/00 Multistage treatment of water, waste water or sewage
• CPC Class Codes: Y02W 10/10 Biological treatment of water, waste water, or sewage

Claims

1. A PROCESS FOR THE TREATMENT OF AQUEOUS CRUDE EFFUENT LIQUORS FROM COAL CARBONISING PLANTS, WHICH COMPRISES DISTILLING SAID CRUDE LIQUOR TO REMOVE AT LEAST THE MAJOR PART OF THE FREE AMMONIA, SUBJECTING THE RESULTING CRUDE WASTE LIQUOR TO BIOCHEMICAL OXIDATION, ADDING LIME TO THE THUS TREATED CRUDE WASTE LIQUOR TO CONVERT THE FIXED AMMONIA SALTS TO FREE AMMONIA SALTS, SEPARATING ALL OR SUBSTANTIALLY ALL THE SOLIDS FROM THE LIMED CRUDE WASTE LIQUOR, AND THEN DISTILLING THE SUPERNATANT LIQUOR TO REMOVE THE AMMONIA SALTS.