Chromatographic study of the thermal decomposition of spent sulfuric acid

Journal Article · Thu Mar 10 04:00:00 EST 1988 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6363699

Berezkina, L G; Borisova, S I; Saenko, N D; Sushchev, V S

One of the most widely used means of regenerating spent sulfuric acid is to decompose them to sulfur dioxide for subsequent conversion to sulfuric acid. During the thermal decomposition of spent sulfuric acid solutions containing organic and inorganic contaminants, complex reactions - in series and parallel - may occur with the formation of a multicomponent gas phase of variable composition: SO/sub 3/, SO/sub 2/, O/sub 2/, H/sub 2/O, CO, CO/sub 2/, and in specific cases NH/sub 3/ and its decomposition products and oxides. A method has been developed for analyzing SO/sub 2/, CO/sub 2/, CO, O/sub 2/, and N/sub 2/ in samples of the gas phase that enables these components to be determined on one chromatograph: SO/sub 2/ and CO/sub 2/ are separated at 100/sup 0/C on a thermostated column with MSK silica gel; CO, O/sub 2/ and N/sub 2/ are determined at room temperature on a column packed with molecular sieves connected to the gas system by a supplementary four-way valve. We present as an illustration the results of an investigation of the decomposition of spent sulfuric acid solutions from the production of methyl methacrylate.

• Research Organization: Ya. V. Samoilov Scientific-Research Institute of Fertilizers and Insectofungicides (USSR)
• OSTI ID: 6363699
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 60:9; ISSN JAPUA
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ADSORBENTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBOXYLIC ACID ESTERS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
DECOMPOSITION
ELEMENTS
ESTERS
HYDROGEN COMPOUNDS
INDUSTRIAL WASTES
INORGANIC ACIDS
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MATERIALS RECOVERY
METHACRYLIC ACID ESTERS
METHYL METHACRYLATE
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ORGANIC COMPOUNDS
OXIDES
OXYGEN
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PROCESSING
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
RECOVERY
RECYCLING
SEPARATION PROCESSES
SILICA GEL
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PRODUCT UTILIZATION
WASTES