GB608237A - Process for freeing gases from phosphine and/or arsine together with any sulphuretted hydrogen present - Google Patents

Process for freeing gases from phosphine and/or arsine together with any sulphuretted hydrogen present

Info

Publication number
GB608237A
GB608237A GB26963/45A GB2696345A GB608237A GB 608237 A GB608237 A GB 608237A GB 26963/45 A GB26963/45 A GB 26963/45A GB 2696345 A GB2696345 A GB 2696345A GB 608237 A GB608237 A GB 608237A
Authority
GB
United Kingdom
Prior art keywords
tower
solution
purifying
liquid
gases
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB26963/45A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solvay SA
Original Assignee
Solvay SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Solvay SA filed Critical Solvay SA
Publication of GB608237A publication Critical patent/GB608237A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Removal Of Specific Substances (AREA)
  • Treating Waste Gases (AREA)

Abstract

Gases are freed from phosphine and/or arsine together with any hydrogen sulphide present by the oxidation of these compounds with hypochlorous acid, the gases being continuously treated with a very dilute solution of hypochlorous ions, e.g. a solution containing 1-20 grams of sodium hypochlorite per litre, buffered by the salts formed by the neutralization of the phosphoric and/or arsenic acids formed in the process. The gases may be injected into the bottom of a tower containing the purifying liquid flowing downwardly. Liquid from the base of the tower is circulated up a second tower into which a solution of an alkali, for example caustic soda, sodium carbonate or bicarbonate, and chlorine is introduced, forming fresh hypochlorite and neutralizing the acid salt. The solution passes into the top of the purifying tower. A part of the liquid may be removed from the base of the purifying tower for recovering the phosphates, arsenates and sulphates contained therein. The pH of purifying solution may be regulated at 9.2. The purification of acetylene and carbon dioxide are referred to.ALSO:Acetylene is freed from phosphine and/or arsine together with any hydrogen sulphide present by the oxidation of these compounds with hydrochlorous acid, the gas being continuously treated with a very dilute solution of hypochlorous ions, e.g. a solution containing 1-20 grams of sodium hypochlorite per litre, buffered by the salts formed by the neutralization of the phosphoric and/or arsenic acids formed in the process. The gas may be injected into the bottom of a tower containing the purifying liquid flowing downwardly. Liquid from the base of the tower is circulated up a second tower into which a solution of an alkali, for example caustic soda, sodium carbonate or bicarbonate, and chlorine is introduced, forming fresh hypochlorite and neutralizing the acid salt. The solution passes into the top of the purifying tower. A part of the liquid may be removed from the base of the purifying tower for recovering the phosphates, arsenates and sulphates contained therein. The pH of purifying solution may be regulated at 9.2.
GB26963/45A 1943-12-31 1945-10-15 Process for freeing gases from phosphine and/or arsine together with any sulphuretted hydrogen present Expired GB608237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE608237X 1943-12-31

Publications (1)

Publication Number Publication Date
GB608237A true GB608237A (en) 1948-09-13

Family

ID=3875169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26963/45A Expired GB608237A (en) 1943-12-31 1945-10-15 Process for freeing gases from phosphine and/or arsine together with any sulphuretted hydrogen present

Country Status (1)

Country Link
GB (1) GB608237A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969479A (en) * 1971-08-02 1976-07-13 Environmental Research Corporation Odor control method
US7740815B2 (en) 2005-03-22 2010-06-22 Edwards Limited Method of treating a gas stream

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969479A (en) * 1971-08-02 1976-07-13 Environmental Research Corporation Odor control method
US7740815B2 (en) 2005-03-22 2010-06-22 Edwards Limited Method of treating a gas stream

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