scholarly journals Determination of sulphur trioxide in the presence of sulphur dioxide, together with some analyses of commercial liquid sulphur dioxide

1927 ◽  
Vol 22 ◽  
pp. 277 ◽  
Author(s):  
J. R. Eckman
Keyword(s):  
Sulphur Dioxide ◽  
Liquid Sulphur ◽  
Sulphur Trioxide

THE RAMAN SPECTRA OF LIQUID SULPHUR TRIOXIDE AND SOLUTIONS OF SULPHUR TRIOXIDE IN INERT SOLVENTS

1961 ◽  
Vol 39 (11) ◽  
pp. 2189-2200 ◽  
Author(s):  
R. J. Gillespie ◽  
E. A. Robinson
Keyword(s):  
Carbon Tetrachloride ◽  
Raman Spectra ◽  
Sulphur Dioxide ◽  
Monomeric Form ◽  
Polymeric Form ◽  
Cyclic Trimer ◽  
Low Concentrations ◽  
Polymeric Species ◽  
Liquid Sulphur ◽  
Sulphur Trioxide

The Raman spectra of liquid sulphur trioxide and of sulphur trioxide dissolved in a number of "inert" solvents have been investigated. A detailed analysis of the spectrum of liquid sulphur trioxide supports the earlier suggestion of Gerding and Nijveld that the main polymeric species in liquid sulphur trioxide is the cyclic trimer. Frequencies are assigned for all the Raman active vibrations of the cyclic trimer. These assignments differ substantially from those given previously by Gerding and Nijveld.The spectra of dilute solutions of sulphur trioxide in sulphur dioxide, sulphuryl chloride, carbon tetrachloride, tetrachlorethylene, and trichlorfluormethane (Freon 11) show that the sulphur trioxide is present mainly in the monomeric form at low concentrations while at higher concentrations a polymeric form, which is very probably the trimer, is also present.

Interferometric determination of the refractive index of liquid sulphur dioxide

2000 ◽  
Vol 11 (12) ◽  
pp. 1714-1720 ◽  
Author(s):  
M Musso ◽  
R Aschauer ◽  
A Asenbaum ◽  
C Vasi ◽  
Emmerich Wilhelm
Keyword(s):  
Refractive Index ◽  
Sulphur Dioxide ◽  
Liquid Sulphur

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

1977 ◽  
Vol 55 (2) ◽  
pp. 355-359 ◽  
Author(s):  
E. Montoneri ◽  
L. Giuffré ◽  
M. Cassago ◽  
E. Tempesti ◽  
M. Fornaroli
Keyword(s):  
Low Temperature ◽  
Sulphur Dioxide ◽  
Liquid Sulphur ◽  
Sulphur Trioxide ◽  
Equimolar Solution

Dicyclohexanecarbonyl sulphate (1) is the prevailing species in the equimolar solution of cyclohexanecarboxylic anhydride and sulphur trioxide in liquid sulphur dioxide. The ionization of 1 to cyclohexyloxocarbenium ions occurs only in the presence of excess sulphur trioxide. Both 1 and C6H11CO+ are stable only in solution and at low temperature.

The determination of ascorbic acid and sulphur dioxide in fruit juices

1941 ◽  
Vol 64 (8) ◽  
pp. 226-229
Author(s):  
H. F. W. Kirkpatrick
Keyword(s):  
Ascorbic Acid ◽  
Sulphur Dioxide ◽  
Fruit Juices

scholarly journals Modelling and Multi-Objective Optimization of the Sulphur Dioxide Oxidation Process

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1072
Author(s):  
Mohammad Reza Zaker ◽  
Clémence Fauteux-Lefebvre ◽  
Jules Thibault
Keyword(s):  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Variable Number ◽  
Inlet Temperature ◽  
Multi Objective Optimization ◽  
Absorption Column ◽  
Maximum Reaction Rate ◽  
Multi Objective ◽  
Maximum Reaction

Sulphuric acid (H2SO4) is one of the most produced chemicals in the world. The critical step of the sulphuric acid production is the oxidation of sulphur dioxide (SO2) to sulphur trioxide (SO3) which takes place in a multi catalytic bed reactor. In this study, a representative kinetic rate equation was rigorously selected to develop a mathematical model to perform the multi-objective optimization (MOO) of the reactor. The objectives of the MOO were the SO2 conversion, SO3 productivity, and catalyst weight, whereas the decisions variables were the inlet temperature and the length of each catalytic bed. MOO studies were performed for various design scenarios involving a variable number of catalytic beds and different reactor configurations. The MOO process was mainly comprised of two steps: (1) the determination of Pareto domain via the determination a large number of non-dominated solutions, and (2) the ranking of the Pareto-optimal solutions based on preferences of a decision maker. Results show that a reactor comprised of four catalytic beds with an intermediate absorption column provides higher SO2 conversion, marginally superior to four catalytic beds without an intermediate SO3 absorption column. Both scenarios are close to the ideal optimum, where the reactor temperature would be adjusted to always be at the maximum reaction rate. Results clearly highlight the compromise existing between conversion, productivity and catalyst weight.

Colorimetric Determination of Sulphur Dioxide and Sulphites in Various Environmental Samples

2003 ◽  
Vol 50 (2) ◽  
pp. 257-260 ◽  
Author(s):  
Sukumar Chatterjee ◽  
Ajai K. Pillai ◽  
V. K. Gupta
Keyword(s):  
Sulphur Dioxide ◽  
Environmental Samples ◽  
Colorimetric Determination

Trace determination of sulphide and sulphur dioxide by vapor molecular absorption spectrometry using magnesium and tellurium hollow cathode lamps

Talanta ◽  
1992 ◽  
Vol 39 (8) ◽  
pp. 967-970 ◽  
Author(s):  
QINHANJIN ◽  
HANQIZHANG ◽  
YIXIANGDUAN ◽  
AIMINYU ◽  
XINWEILIU ◽  
...  
Keyword(s):  
Hollow Cathode ◽  
Sulphur Dioxide ◽  
Absorption Spectrometry ◽  
Trace Determination ◽  
Molecular Absorption ◽  
Molecular Absorption Spectrometry
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