scholarly journals The ring opening and oligomerisation reactions of an epoxide and an episulfide on aluminosilicates in the liquid phase

2005 ◽  
Vol 3 (2) ◽  
pp. 230-244 ◽  
Author(s):  
András Fási ◽  
István Pálinkó ◽  
Ágnes Gömöry ◽  
Imre Kiricsi
Keyword(s):  
Liquid Phase ◽  
Gas Phase ◽  
Propylene Oxide ◽  
Ring Opening ◽  
Reaction Pathway ◽  
Batch Reactor ◽  
Solid Acids ◽  
Cyclic Dimer ◽  
Ring Opening Reactions ◽  
Transformation Mechanisms

AbstractThe ring opening reactions of propylene oxide (methyloxirane) or ethylene sulfide )thiirane) were studied in the liquid phase over HZSM-5, HY-FAU or AlMCM-41 at 363 K or 423 K and under 1 or 20 bar pressure in a batch reactor. The proportion of these routes were identified: (i) single C−O scission providing non-cyclic products, (ii) double C−O cleavage leading to the loss of the heteroatom, (iii) oligomerisation resulting in cyclic dimers and the trimer of thiirane and a non-cyclic dimer of methyloxirane. The reaction pathway depended on the conditions and the solid acids used. Findings are compared to those in the gas phase over the same solid acids. Transformation mechanisms are also suggested.

scholarly journals Acid-catalyzed Ring-opening Reactions of Propylene Oxide and Isobutylene Oxide in Alcohols

1968 ◽  
Vol 71 (11) ◽  
pp. 1943-1944 ◽  
Author(s):  
Shizen SEKIGUCHI ◽  
Hisaaki INOUE ◽  
Mitsuo HAYASHI ◽  
Koji MATSUI
Keyword(s):  
Propylene Oxide ◽  
Ring Opening ◽  
Ring Opening Reactions ◽  
Acid Catalyzed

scholarly journals Theoretical study on the nucleophilic fluoroalkylation of propylene oxide with fluorinated sulfones

2013 ◽  
Vol 78 (4) ◽  
pp. 483-494
Author(s):  
Ling-Li Han ◽  
Tao Liu
Keyword(s):  
Gas Phase ◽  
Propylene Oxide ◽  
Nucleophilic Addition ◽  
Ring Opening ◽  
Theoretical Study ◽  
Addition Reactions ◽  
Ring Opening Reaction ◽  
Reactivity Order ◽  
Better Than ◽  
Good Agreement

The path of nucleophilic fluoroalkylation reaction of propylene oxide with PhSO2CYF- (Y=F,H, and PhSO2, respectively) in gas phase and in Et2O solvent were studied theoretically. The nucleophilic fluoroalkylation of propylene oxide with fluorinated carbanions was probed by the reactivity comparison between (benzenesulfonyl)monofluoromethyl anion (PhSO2CHF-), (benzenesulfonyl) difluoromethyl anion (PhSO2CF2-), and bis(benzenesul-fonyl) monofluoromethyl anion ((PhSO2)2CF-). The nucleophilicity reactivity order of PhSO2CYF- (Y = F, H, and PhSO2) is [(PhSO2)2CF-] > PhSO2CHF- > PhSO2CF2-, which indicates that introducing another electron-withdrawing benzenesulfonyl group is an effective way to significantly increase the nucleophilicity of the fluorinate carbanions. For comparison, we also studied the nucleophilic addition reactions of propylene oxide with chlorine substituted carbanion PhSO2CHCl-. The calculated results show that the nucleophilicity of PhSO2CYF- is better than that of PhSO2CHCl- for the ring opening reaction with propylene oxide. The calculated results are in good agreement with the available experiments.

The ring-opening reactions of propylene oxide and propylene sulfide with dibutylamine

Tetrahedron ◽  
1979 ◽  
Vol 35 (3) ◽  
pp. 303-308 ◽  
Author(s):  
Hiroshi Kakiuchi ◽  
Takao Iijima ◽  
Hideaki Horie
Keyword(s):  
Propylene Oxide ◽  
Ring Opening ◽  
Ring Opening Reactions

scholarly journals Common salt effects on the ring-opening reactions of propylene oxide with dichloroacetic acid.

1984 ◽  
pp. 1938-1947
Author(s):  
Hiroshi KAKIUCHI ◽  
Takao IIJIMA ◽  
Masami YUSA ◽  
Shoji SUZUKI ◽  
Nariaki OKAJIMA
Keyword(s):  
Propylene Oxide ◽  
Ring Opening ◽  
Dichloroacetic Acid ◽  
Common Salt ◽  
Salt Effects ◽  
Ring Opening Reactions

The ring-opening reactions of propylene oxide with chloroacetic acids

Tetrahedron ◽  
1980 ◽  
Vol 36 (8) ◽  
pp. 1011-1016 ◽  
Author(s):  
Hiroshi Kakiuchi ◽  
Takao Iijima
Keyword(s):  
Propylene Oxide ◽  
Ring Opening ◽  
Chloroacetic Acids ◽  
Ring Opening Reactions

Application of Disk Aerators to Recarbonation of Alkaline Wastewater from Wet Gasification of Carbide

1991 ◽  
Vol 24 (7) ◽  
pp. 277-284 ◽  
Author(s):  
E. Gomólka ◽  
B. Gomólka
Keyword(s):  
Carbon Dioxide ◽  
Liquid Phase ◽  
Gas Phase ◽  
Flue Gas ◽  
Carbonic Acid ◽  
Low Cost ◽  
Flue Gases ◽  
Carbon Dioxide Content ◽  
Patent Claim ◽  
Phase Dispersion

Whenever possible, neutralization of alkaline wastewater should involve low-cost acid. It is conventional to make use of carbonic acid produced via the reaction of carbon dioxide (contained in flue gases) with water according to the following equation: Carbon dioxide content in the flue gas stream varies from 10% to 15%. The flue gas stream may either be passed to the wastewater contained in the recarbonizers, or. enter the scrubbers (which are continually sprayed with wastewater) from the bottom in oountercurrent. The reactors, in which recarbonation occurs, have the ability to expand the contact surface between gaseous and liquid phase. This can be achieved by gas phase dispersion in the liquid phase (bubbling), by liquid phase dispersion in the gas phase (spraying), or by bubbling and spraying, and mixing. These concurrent operations are carried out during motion of the disk aerator (which is a patent claim). The authors describe the functioning of the disk aerator, the composition of the wastewater produced during wet gasification of carbide, the chemistry of recarbonation and decarbonation, and the concept of applying the disk aerator so as to make the wastewater fit for reuse (after suitable neutralization) as feeding water in acetylene generators.

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