Determination of Sulfur Trioxide in Chlorosulfonic Acid Thermometric Methods

1950 ◽  
Vol 22 (4) ◽  
pp. 549-552 ◽  
Author(s):  
William. Seaman ◽  
J. T. Woods ◽  
H. N. Bank
Keyword(s):  
Sulfur Trioxide ◽  
Chlorosulfonic Acid

Identification and determination of sulfur trioxide in sulfur dioxide by Raman spectrometry

1973 ◽  
Vol 45 (13) ◽  
pp. 2291-2292 ◽  
Author(s):  
Peggy A. Skotnicki ◽  
Alfred G. Hopkins ◽  
Chris W. Brown
Keyword(s):  
Sulfur Dioxide ◽  
Sulfur Trioxide ◽  
Raman Spectrometry

scholarly journals SULFATION OF ABIES ETHANOL LIGNIN WITH COMPLEXES OF SULFUR TRIOXIDE WITH 1,4-DIOXANE AND PYRIDINE

2020 ◽  
pp. 5-15
Author(s):  
Yuriy Nikolayevich Malyar ◽  
Natal'ya Yur'yevna Vasil'yeva ◽  
Aleksandr Sergeyevich Kazachenko ◽  
Galina Pavlovna Skvortsova ◽  
Irina Vladimirovna Korol'kova ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Sulfur Trioxide ◽  
Chlorosulfonic Acid ◽  
Gel Permeation Chromatography ◽  
Ftir Spectra ◽  
Water Soluble ◽  
Simultaneous Increase ◽  
Absorption Bands ◽  
High Sulfur Content ◽  
Low Degree

In this work, we optimized the process of sulfating abies ethanol lignin with complexes of sulfuric anhydride with pyridine and 1,4-dioxane. Experimentally found are the conditions for the implementation of the process of sulfation of abies ethanol lignin by complexes of sulfur trioxide with 1,4-dioxane and pyridine, providing a high sulfur content (12.0–12.6%). It was shown that a high sulfur content of 12.0–13.5% (mass.) in the obtained ethanol lignin sulfate is achieved when the ratio of the amount of chlorosulfonic acid to the amount of abies ethanol lignin is 20.22 : 1 mmol : g and the duration of the sulfation process is 60–120 min and independent of the nature of the sulfating complex. The structure and composition of water-soluble sulfated abies ethanol lignin are confirmed by FTIR spectroscopy, gel permeation chromatography and elemental analysis. In the FTIR spectra of sulfated abies ethanol lignin, in comparison with the FTIR spectra of the initial abies ethanol lignin, there are absorption bands in the region of 1270–1260, 1220–1212, 861–803 cm-1, corresponding to vibrations of sulfate groups. Compared to the initial lignin, sulfated abies ethanol lignin has a low degree of polydispersity. In particular, there was an increase in Mw c ~1.5 kDa to ~3.4 kDa in lignin sulfated for 30 min and a decrease in polydispersity from 2.59 to 1.22 compared to the initial abies ethanol lignin. With an increase in the sulfation time, the profile of the molecular mass distribution curve shifts to a high molecular weight region, with a simultaneous increase in polydispersity to 1.5 and Mw increases to ~4.3 kDa.

ICP-AES Determination of Sulfide and Sulfate Content in Pebble and Crushed Stone

2017 ◽  
Vol 726 ◽  
pp. 70-74
Author(s):  
Qian Nan Li ◽  
Man Li ◽  
Qing Dan Yuan ◽  
Dan Hua Xu
Keyword(s):  
Sulfur Trioxide ◽  
National Standard ◽  
Crushed Stone ◽  
Test Results ◽  
Sulfate Content ◽  
Pretreatment Method ◽  
Relative Standard ◽  
Weight Method ◽  
Sulphur Trioxide

Generally, the content of sulfide and sulfate (expressed as a sulphur trioxide) in pebble and crushed stone for construction is low. So use the weight method specified in the national standard method for determination, is not only tedious and time consuming, but also not accurate enough. In this paper, with reference to the pretreatment method of the relevant national standard, rapid and accurate test results can usually be obtained for the determination of sulfur trioxide in and crushed stone for construction by using ICP-AES as a new method, greatly reducing the time of the experiment and improve the efficiency. According to the analysis of spectrum interference, 182.0 nm was selected as the best analysis of spectral line for sulfur. The detection line of this method (3S) was 0.016 mg/L, the recovery rate of the sample was between 93.3%-104.0%, and the relative standard deviation (n=6) of the parallel samples was less than 1.05%.

Determination of Sulfur Trioxide in Gypsum

2008 ◽  
pp. 67-67-5
Author(s):  
S Goswami ◽  
D Chandra
Keyword(s):  
Sulfur Trioxide

THE PREPARATION AND PROPERTIES OF THE POTASSIUM SKATOLYL SULFATES (THE "SULFATOXYSKATOLES")

1965 ◽  
Vol 43 (4) ◽  
pp. 469-478 ◽  
Author(s):  
R. A. Heacock ◽  
O. Hutzinger
Keyword(s):  
Sulfur Trioxide ◽  
Chlorosulfonic Acid ◽  
Chromatographic Behavior ◽  
Ultraviolet Spectroscopy ◽  
Solvent Systems

The four isomeric potassium skatolyl sulfates, with the sulfate residue attached to the 4-, 5-, 6-, and 7-positions in the benzene moiety of the skatole molecule, have been synthesized. The four isomers were prepared by the sulfation of the corresponding hydroxyskatoles with either (a) the pyridine – sulfur trioxide complex in pyridine or (b) chlorosulfonic acid in pyridine. The ultraviolet spectroscopy of this group of compounds is discussed together with their paper chromatographic behavior in several different solvent systems.

scholarly journals Rapid Determination of Sulfur Trioxide in Portland Cement by Turbidimetry

1980 ◽  
Vol 88 (1018) ◽  
pp. 356-358
Author(s):  
Toshihisa MARUTA ◽  
Akihiko TAKEI ◽  
Giichi SUDOH
Keyword(s):  
Portland Cement ◽  
Sulfur Trioxide ◽  
Rapid Determination
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