scholarly journals Studies on Organic Sulfur Compounds. II. Sulfur-Containing Derivatives of Acid Hydrazide Reactions of Thioformylbenzhydrazide.

1956 ◽  
Vol 77 (4) ◽  
pp. 646-648
Author(s):  
Hiroshi Kato ◽  
Kikumasa Sato ◽  
Masaki Ohta
Keyword(s):  
Acid Hydrazide ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds ◽  
Derivatives Of ◽  
Sulfur Containing

Analysis of aromatic hydrocarbon in medium- to high-sulfur coals from Fenxi, Shanxi Province

2018 ◽  
Vol 15 (6) ◽  
pp. 786-791 ◽  
Author(s):  
Yanli Yang ◽  
Qiaojing Zhao
Keyword(s):  
Gas Chromatography ◽  
Sulfur Compounds ◽  
Shanxi Province ◽  
Organic Sulfur ◽  
Gas Chromatography Mass Spectrometry ◽  
Content Type ◽  
Organic Sulfur Compounds ◽  
High Thermodynamic Stability ◽  
Sulfur Containing ◽  
Maturity Parameters

Purpose This study aims to investigate the compositional characteristics of aromatic hydrocarbons extracted from coals and to describe how the sulfur content influences the properties of coals and whether widely accepted maturity parameters are suitable for medium- to high-sulfur coal. Design/methodology/approach Four samples of medium- to high-sulfur coal were obtained from Fenxi, Shanxi Province, and studied using gas chromatography and gas chromatography–mass spectrometry (GC-MS). Findings The GC-MS results showed that there were five series of compounds were identified in the aromatic fractions: naphthalenes, phenanthrenes, oxygen-containing compounds, biphenyls and sulfur-containing compounds. The substituent group was mainly methyl. The content of dibenzothiophenes was high, which was attributed to their high thermodynamic stability. The presence of sulfur reduced the content of oxygen-containing compounds. A depositional environment that facilitated the formation of organic sulfur compounds led to a higher content of naphthalenes. Originality/value The development of methods for removing organic sulfur compounds would benefit from a study of their nature, which would be important for improving the use of coal.

Organische Schwefelverbindungen, XXIX [1] Thiocarbonyl-Derivate von 2-Thioxo-Malonsäureestern / Organic Sulfur Compounds, XXIX [1] Thiocarbonyl Derivatives of 2-Thioxomalonic Acid Esters

1978 ◽  
Vol 33 (4) ◽  
pp. 417-419 ◽  
Author(s):  
Klaus Beelitz ◽  
Gerhard Höhne ◽  
Klaus Praefcke
Keyword(s):  
Malonic Acid ◽  
Acid Ester ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds ◽  
Derivatives Of ◽  
Acid Esters

Abstract The first derivatives of the hitherto unknown 2-thioxo malonic acid ester could be achieved. In dependence of conditions and presence of an enophile (3) substituted dihydro thiopyrans (5) as 4 + 2 addition products of hypothetic 2-thioxo malonic acid esters with 3 or α-oxo-methylene bisxanthates 7 resp. are formed in reactions of dibromo malonic acid esters 1 with potassium O-ethylxanthate (2).

Organic Sulfides as Vulcanizing Agents of Rubber

1951 ◽  
Vol 24 (1) ◽  
pp. 211-223 ◽  
Author(s):  
R. L. Sibley
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Organic Compounds ◽  
Fractional Part ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Rubber Compound ◽  
Organic Sulfur Compounds ◽  
Organic Sulfides ◽  
Sulfur Containing

Abstract 1. It has been demonstrated that a number of organic sulfides possess the property of breaking down under vulcanizing conditions in a rubber compound to produce a cure. 2. Although several scores of sulfur-containing organic compounds other than those discussed in this paper or described in other papers have been tested, as yet there appear possible no generalizations to serve as a guide to further exploratory studies. 3. Organic sulfur compounds which are unstable under temperature conditions higher than normal do not liberate all of their sulfur in all cases. 4. Organic sulfur compounds employed alone as vulcanizing agents usually produce slower-curing rubber stocks than does sulfur, and at the same time lessen greatly the tendency of the stock to scorch. 5. Stocks of satisfactory physical properties, superior aging characteristics, and outstanding freedom from scorchiness are obtained by the use of a fractional part of the normal sulfur requirement together with a sulfur liberator. 6. Morpholine disulfide is a good example of a sulfur liberator, and exhibits its greatest effects in conjunction with a mercaptobenzothiazole type accelerator. 7. Morpholine disulfide gives satisfactory cures when used in place of sulfur in natural rubber, GR-S rubber, and Hycar-OR, but gives slow cures in GR-I rubber.

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