Treatment equipment of exhaust gas containing organic halogen compounds

• US 5,238,656 A
• Filed: 10/23/1991
• Issued: 08/24/1993
• Est. Priority Date: 10/26/1990
• Status: Expired due to Term

• Current Assignee: Tosoh Corporation
• Original Assignee: Tosoh Corporation
• Inventors: Harada, Masashi, Tajima, Masahiro
• Primary Examiner(s): Warden, Robert J.
• Assistant Examiner(s): Kim, Christopher Y.
• Application Number:
  US07/781,741
• Time in Patent Office: 671 Days
• Field of Search: 422/171, 422/172, 422/177, 422/179, 422/180, 422/211, 423/240 R, 423/240 S, 423/245.3, 423/481, 423/488
• US Class Current: 422/171
• CPC Class Codes: B01D 53/8662 Organic halogen compounds
• CPC Class Codes: B01J 21/063 Titanium; Oxides or hydroxides thereof
• CPC Class Codes: B01J 21/066 Zirconium or hafnium; Oxides or hydroxides thereof
• CPC Class Codes: B01J 23/56 Platinum group metals
• CPC Class Codes: B01J 23/64 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
• CPC Class Codes: B01J 23/76 combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
• CPC Class Codes: B01J 23/84 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
• CPC Class Codes: B01J 27/053 Sulfates
• CPC Class Codes: B01J 27/16 containing oxygen , i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr

Abstract

A treatment equipment of exhaust gas containing organic halogen compounds using a catalytic decomposition unit packed with decomposition catalyst for organic halogen compounds having strong acidic sites and a wash tower for removing hydrogen halide gas generated by the decomposition of the organic halogen compounds.

Claims

1. A treatment equipment for purifying an exhaust gas containing organic halogen compounds, comprising a steam supply means connected to a steam supply source operatively connected to a catalytic decomposition unit packed with a decomposition catalyst for organic halogen compounds having strong acidic sites and said catalytic decomposition unit operatively connected to a wash tower for removing hydrogen halide gas generated by the decomposition of the organic halogen compounds.

2. The treatment equipment of claim 1, further comprising an organic halogen concentration unit operatively connected to said catalytic decomposition unit before said steam supply means.

3. The treatment equipment of claim 1 further comprising a heating means operatively connected before the catalytic decomposition unit.

4. The treatment equipment of any one of claim 1 through claim 3, further comprising an oxidation unit for carbon monoxide operatively connected after the catalytic decomposition unit.

5. The treatment equipment of any of claim 1 through claim 3, wherein the decomposition catalyst for the organic halogen compounds comprises at least one oxide of Si, Al, Ti, Zr, B, Nb, Cr, Ga, Mo, W, Y, Cu, Sr, La, Fe, Mn or P.

6. The treatment equipment of claim 5, wherein the decomposition catalyst for the organic halogen compounds carries sulfuric acid or phosphoric acid.

7. The treatment equipment of claim 5, wherein the decomposition catalyst for the organic halogen compounds further comprises at least one metal of Cu, Fe, Co, Ni, Mn, Pt, Pd, Rh, Au, Ag, Ir, W, Mo, V, Cd, Sn or Pb.

8. The treatment equipment of claim 7, wherein the decomposition catalyst is Cr and Pd, carried on a titania-zirconia oxide composite on a cordierite honeycomb.

9. The treatment equipment of claim 7, wherein the decomposition catalyst is Pd carried on a titania-zirconia oxide composite.

10. The treatment equipment of claim 7, wherein the decomposition catalyst is Co carried on H-type mordenite and alumina.

11. The treatment equipment of claim 7, wherein the decomposition catalyst is W carried on a titania-zirconia composite oxide.