PROCESS AND REAGENTS FOR THE REMOVAL OF MERCURY FROM COMBUSTION GASES

• Main Author: HURLEY, PETER, J
• Format: Patent
• Language: English; French
• Published: 17.01.2008
• Subjects: CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS; CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; FIRE-FIGHTING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; LIFE-SAVING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A method is provided for removing elemental mercury from a combustion gas by allowing the combustion gas to contact an aqueous dispersion or slurry (which can be a spray or aerosol) containing an alkaline-earth metal sulfide and a hyperdispersant or other surface- active agent, and preferably a phosphate and a pH buffer. L'invention concerne un procédé d'extraction de mercure élémentaire d'un gaz de combustion en laissant le gaz de combustion venir au contact d'une dispersion aqueuse ou d'un laitier (qui peut être une pulvérisation ou un aérosol) contenant un sulfure de métal alcalino-terreux et un hyperdispersant ou autre agent tensioactif, et de préférence un phosphate et un tampon pH.