公开(公告)号：AT194503T

公开(公告)日：2000-07-15

申请号：AT97916849

申请日：1997-03-19

Applicant: STANFORD RES INST INT

Inventor： ROSS DAVID S ,  JAYAWEERA INDIRA ,  BOMBERGER DAVID C ,  LEIF ROALD N

IPC: A62D3/00 ,  A62D3/20 ,  A62D3/34 ,  A62D3/35 ,  A62D3/36 ,  A62D3/38 ,  A62D101/02 ,  A62D101/04 ,  A62D101/06 ,  A62D101/22 ,  A62D101/24 ,  A62D101/26 ,  A62D101/28 ,  A62D101/40 ,  B01J3/00 ,  B01J19/00 ,  B09B3/00 ,  C02F1/72 ,  C02F11/08

Abstract: This invention relates to a process for the decomposition of material selected from halogenated organic compounds, to compounds which are environmentally acceptable, or are amenable to further degradation by conventional disposal systems to produce environmentally acceptable products, which process comprises: (a) conveying an aqueous solution or an aqueous slurry of material into a reaction zone capable of withstanding the temperatures and pressures of decomposition of the material; (b)contacting the material in the reaction zone with aqueous sodium carbonate as a reactant in an amount effective to decompose the material under hydrothermal oxidation conditions of between about 300 DEG and 400 DEG C. and a pressure of between about 20 and 400 atmospheres for between 0.01 and 120 min wherein the sodium carbonate at the reaction conditions is present at about 10% or less as a water soluble salt as compared to the solubility of the salt at ambient conditions, wherein the process occurs in the presence of a gaseous oxidant wherein said oxidant is present in an amount of between about 0.01 and 50% by weight of the material; (c) producing about 99% or greater of the decomposition of the material, or 99% or greater conversion of the material to compounds which are environmentally acceptable or to compounds which are amendable to further degradation; and (d) optionally degrading further the compounds produced in step (c) by reaction to environmentally acceptable products. Preferably, the specific reactant is sodium carbonate and the oxidant is oxygen or air. Preferably, the halogenated organic compound is selected from polychlorobiphenyl, polybromobiphenyl or chlorobenzodioxin compounds.

公开(公告)号：CA2249404A1

公开(公告)日：1997-09-25

申请号：CA2249404

申请日：1997-03-19

Applicant: JAYAWEERA INDIRA ,  BOMBERGER DAVID C ,  ROSS DAVID J ,  LEIF ROALD N ,  STANFORD RES INST INT

Inventor： JAYAWEERA INDIRA ,  ROSS DAVID S ,  LEIF ROALD N ,  BOMBERGER DAVID C

IPC: A62D3/00 ,  A62D3/20 ,  A62D3/34 ,  A62D3/35 ,  A62D3/36 ,  A62D3/38 ,  A62D101/02 ,  A62D101/04 ,  A62D101/06 ,  A62D101/22 ,  A62D101/24 ,  A62D101/26 ,  A62D101/28 ,  A62D101/40 ,  B01J3/00 ,  B01J19/00 ,  B09B3/00 ,  C02F1/72 ,  C02F11/08

Abstract: This invention relates to a process for the decomposition of material selected from halogenated organic compounds, to compounds which are environmentally acceptable, or are amenable to further degradation by conventional disposal systems to produce environmentally acceptable products, which process comprises: (a) conveying an aqueous solution or an aqueous slurry of material into a reaction zone capable of withstanding the temperatures and pressures of decomposition of the material; (b) contacting the material in the reaction zone with aqueous sodium carbonate as a reactant in an amount effective to decompose the material under hydrothermal oxidation conditions of between about 300 and 600 ~C and a pressure of between about 10 and 400 atmospheres for between 0.01 and 120 min wherein the specific reactant, a carbonate such as sodium carbonate, at the reaction conditions is present at about 10 % or less as a water-soluble salt as compared to the solubility of the salt at ambient conditions wherein the specific reactant is essentially present as a solid and the oxidation occurs under heterogeneous conditions, wherein the process occurs in the presence of a gaseous oxidant wherein said oxidant is present in an amount of between about 0.01 and 50 % by weight of the material; (c) producing about 99 % or greater of the decomposition of the material, or 99 % or greater conversion of the material to compounds which are environmentally acceptable or to compounds which are amendable to further degradation; and (d) optionally degrading further the compounds produced in step (c) by reaction to environmentally acceptable products. Preferably, the specific reactant is sodium carbonate and the oxidant is oxygen or air. Preferably, the halogenated organic compound is selected from polychlorobiphenyl, polybromobiphenyl mono-chlorobenzodioxin or polychlorobenzodioxin compounds.