FR2267284A1 - Purification of effluent gases by removal of sulphurdioxide - using alkaline earth metal hydroxide, oxygen and a catalyst to produce sulphate - Google Patents

Purification of effluent gases by removal of sulphurdioxide - using alkaline earth metal hydroxide, oxygen and a catalyst to produce sulphate

Info

Publication number
FR2267284A1
FR2267284A1 FR7510908A FR7510908A FR2267284A1 FR 2267284 A1 FR2267284 A1 FR 2267284A1 FR 7510908 A FR7510908 A FR 7510908A FR 7510908 A FR7510908 A FR 7510908A FR 2267284 A1 FR2267284 A1 FR 2267284A1
Authority
FR
France
Prior art keywords
earth metal
alkaline earth
sulphate
soln
catalyst
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.)
Granted
Application number
FR7510908A
Other languages
French (fr)
Other versions
FR2267284B1 (en
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.)
Dravo Corp
Original Assignee
Dravo Corp
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 Dravo Corp filed Critical Dravo Corp
Publication of FR2267284A1 publication Critical patent/FR2267284A1/en
Application granted granted Critical
Publication of FR2267284B1 publication Critical patent/FR2267284B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/464—Sulfates of Ca from gases containing sulfur oxides
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The prodn. of alkaline earth metal sulphate in the effluent from a wet purificn. system for removing SO2 from a gas contg. it as an impurity is increased by contacting the aq purifying soln contg an alkaline earth metal e.g. Ca with a flow of gas to be purified so as to produce sulphites and sulphates, and adding a predetermined amt of oxidising catalyst to the soln and an oxygen rich gas to oxidise the sulphites to sulphates, while the soln is kept basic by addn of another alkaline earth metal to ppte. the solids esp. the alkaline earth metal sulphate. Since calcium sulphite tends to form as a voluminous mass of interlocking crystals it clogs the appts. and is difficult to dispose of being more soluble than the sulphate. The calcium sulphate produced by oxidation however, not only finds use as gypsum, but forms a spreadable powder on dehydrating the ppte.
FR7510908A 1974-04-10 1975-04-08 Purification of effluent gases by removal of sulphurdioxide - using alkaline earth metal hydroxide, oxygen and a catalyst to produce sulphate Granted FR2267284A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45956474A 1974-04-10 1974-04-10

Publications (2)

Publication Number Publication Date
FR2267284A1 true FR2267284A1 (en) 1975-11-07
FR2267284B1 FR2267284B1 (en) 1977-04-15

Family

ID=23825300

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7510908A Granted FR2267284A1 (en) 1974-04-10 1975-04-08 Purification of effluent gases by removal of sulphurdioxide - using alkaline earth metal hydroxide, oxygen and a catalyst to produce sulphate

Country Status (4)

Country Link
JP (1) JPS50133973A (en)
BE (1) BE827108A (en)
DE (1) DE2515272A1 (en)
FR (1) FR2267284A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058230A (en) * 1983-09-09 1985-04-04 Babcock Hitachi Kk Waste gas desulfurization and apparatus thereof
DE3544937A1 (en) * 1985-12-19 1987-06-25 Kali Chemie Ag DESULFURATION PROCESS

Also Published As

Publication number Publication date
DE2515272A1 (en) 1975-10-16
FR2267284B1 (en) 1977-04-15
JPS50133973A (en) 1975-10-23
BE827108A (en) 1975-07-16

Similar Documents

Publication Publication Date Title
EP0292083A3 (en) Method of producing reactive calcium hydroxides for gas and exhaust gas purification, and method of purifying gases and exhaust gases
ES451739A1 (en) Method for oxidation of SO{HD 2 {B scrubber sludge
GB1433762A (en) Mehtod of removing nitrogen and other oxides from gas streams
ATE89493T1 (en) METHOD AND DEVICE FOR TREATMENT OF CHLORINE-CONTAINING WASTEWATER.
GB1412055A (en) Method for desulphurizing a waste gas
CA2050974A1 (en) Sulfur dioxide removal process with gypsum and magnesium hydroxide production
ATE109370T1 (en) PROCESS FOR REMOVAL OF SULFUR DIOXIDE FROM FLUE GASES.
US3846535A (en) Method for absorbing sulfur oxides from gaseous mixtures and regenerating the absorbent
ES455168A1 (en) Brine purification process
FR2267284A1 (en) Purification of effluent gases by removal of sulphurdioxide - using alkaline earth metal hydroxide, oxygen and a catalyst to produce sulphate
GB1494272A (en) Apparatus for the removal of a gaseous component from a gas stream
JPS5443196A (en) Prduction of aqueous solution of calcium nitrite
ES2012013A6 (en) Process and installation for dry separation of noxious substances from flue gases.
ATE61944T1 (en) PROCESSES FOR REDUCING CHLORIDE LOAD IN WET FLUE GAS DESULPHURIZATION PLANTS.
JPS52114580A (en) Purification of tail gas from sulfur recovery unit
JPS52111899A (en) Production of gypsum
SU912233A1 (en) Method of cleaning gases from acid components on the sorbent
SU384530A1 (en) METHOD FOR CLEANING CARBON DIOXIDE GAS FROM HYDROGEN
FR2295931A1 (en) Purifying waste liquor - from e.g. sodium carbonate prodn., ammonia regeneration, brine purifcn etc.
SU860831A1 (en) Method of cleaning waste gases from sulphur anhydride
ES308046A1 (en) A method of recovering sulfur contents from a combustión gas at high temperature. (Machine-translation by Google Translate, not legally binding)
Urban et al. TREATMENT OF AN AQUEOUS WASTE STREAM CONTAINING AMMONIUM HYDROXIDE
JPS51151256A (en) A process for denitration of exhaust gases
JPS61245822A (en) Removal of sulfur dioxide
FR2202714A1 (en) Sulphur dioxide removal from waste gas, prior to atmospheric release - using a non-volatile base to give a sulphite

Legal Events

Date Code Title Description
ST Notification of lapse