Results 261 to 270 of about 32,232 (288)

Pervaporation behavior of asymmetric sulfonated polysulfones and sulfonated poly(ether sulfone) membranes

Journal of Applied Polymer Science, 2000
The sulfonation of polymers and the pervaporation behavior of asymmetric polymeric membranes are described in this study. We confirmed that the sulfonic acid group was successively introduced into the polymer chain by FTIR and 1H-NMR characterization.
I. S. Byun, J. W. Seo, I. C. Kim
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Revisit to the sulfonation of pyrroles: is the sulfonation position correct?

Tetrahedron Letters, 2000
Abstract Sulfonation of pyrrole and its 1-methyl derivatives with a sulfur trioxide–pyridine complex was found to give 3-sulfonated pyrroles, but not 2-sulfonates as described in textbooks. The replacement of 1-methyl-2-tri-n-butylstannylpyrrole with trimethylsilyl chlorosulfonate, followed by quenching with aq.
Akira Mizuno, Yukiko Kan, Harukazu Fukami, Shinsuke Matsuki, Tomoe Kamei, Yoshiaki Oyama, Kazuo Miyazaki   +6 more
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Sulfonation of Polyamides

Israel Journal of Chemistry, 1974
AbstractThe sulfonation of polyamides (Nylons‐3,6,11 and 6,6) was investigated using fuming sulfuric acid and solutions of SO3 in CCl4. The sulfonated polymers were soluble in water and insoluble in ethanol. Acid hydrolysis of the polymers and quantitative determination of the amino acids in the hydrolysate showed the presence of α‐sulfo amino acids ...
Albert Zilkha, Jacob Vaya
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The metabolism of the surfactants dodecyl sulfonate and hexadecyl sulfonate in the rat

Toxicology and Applied Pharmacology, 1978
Abstract When [1-14C]dodecyl sulfonate and [1-14C]hexadecyl sulfonate were administered orally and ip to free-ranging rats and iv to anesthetized rats, the major route of excretion of radioactivity was urinary. Small amounts only of parent surfactant appeared in the feces of animals dosed orally with [1-14C]dodecyl sulfonate, but large amounts of [1 ...
Douglas Howes, Anthony H. Olavesen, Andrew J. Taylor, J. Gordon Black   +3 more
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Synthesis of cation exchange membranes based on sulfonated polyether sulfone with different sulfonation degrees

Journal of Membrane Science, 2018
Abstract Composite cation exchange membranes (C-CEMs) based on mainchain sulfonated polyether sulfone (SPES) and polyvinyl pyrrolidone (PVP) have been prepared and the effects of hydrophilicity on C-CEM properties investigated in a previous work. In this study, membrane properties were optimized by investigating the effects of degrees of sulfonation (
Lin Guo, Jianyou Wang, Jinli Zhao
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The polysulfonylamines bis(methylsulfonamido) sulfone and bis(trifluoromethylsulfonamido) sulfone

Acta Crystallographica Section C Crystal Structure Communications, 2003
Bis(methylsulfonamido) sulfone, C(2)H(8)N(2)O(6)S(3) or SO(2)(NHSO(2)CH(3))(2), was synthesized from imidobis(sulfonyl chloride), HN(SO(2)Cl)(2), and bis(trimethylsilyl)methane, CH(2)[Si(CH(3))(3)](2), in chlorotrimethylsilane solution. In the solid state, there are two independent molecules linked by two N-H...O hydrogen bridges into infinite chains ...
Zdirad Žák, Jan Taraba
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Sulfones and Sulfoximines

1977
Sulfones are compounds in which the sulfur atom is bonded to two carbon atoms and two terminal oxygens in a tetrahedral arrangement, which is easily deformable.1 The sulfonyl moiety probably is a hydrid of the forms shown below ...
Thomas C. Klingler, William W. Brand, William E. Truce   +2 more
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Sulfation and sulfonation

Journal of the American Oil Chemists' Society, 1952
SummaryPatent and technical literature contain a wide variety of references to sulfation and sulfonation. Many of these relate to methods specific for individual compounds or substituted functional groups, or to involved methods undesirable for commercial plant operation.
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Sulfonation and Sulfation

Industrial & Engineering Chemistry, 1951
E. Paul. Jones, Everett E Gilbert
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Sulfonic Esters of Carbohydrates

1953
Publisher Summary This chapter discusses sulfonic esters of carbohydrates. Of the various ways in which sulfonic esters may be synthesized, only two––the use of metallic salts of sulfonic acids and the use of suljonyl halides–– have so far achieved importance in carbohydrate chemistry.
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