Competitive chlorination reactions with ICl. II. CH₄, C₂H₆, C₃H₈, and C₂H₅Cl

Abstract

The H atom abstraction from CHI, C2H,, C3HE, and C2H,CI by C1 atoms produced by photolysis of IC1 in daylight has been studied. Relative rates for the abstract~ons from CH,, C,H,, primary and secondary hydrogens from propane, and for the abstraction from the CH, and CH2CI sides of C2H,C1 have been obtained at room temperature. These data are compared hith other l~terature values.

Halogen-Mediated Conversion of Hydrocarbons to Commodities

“…Interest in the single-stage halogenation and oxyhalogenation continued owing to the simplicity of operation. 38,43 Since the 1960s, several new concepts and processes have emerged, including halogen-mediated alkane dehydrogenation, [44][45][46] halogenation of alkanes by interhalogen compounds, [47][48][49] zeolite-catalyzed coupling of methyl halides (CH3X) to higher hydrocarbons, 50,51 high-temperature pyrolysis of methyl halides to chemicals, 52 superacid-aided selective alkane halogenation, 53,54 FeBr3-base methane-to-methanol, 55 and integrated bromine-mediated light alkane transformation to chemicals and fuels. 56,57 Catalyzed oxybromination of light alkanes regained much research interest in recent years.…”

“…Interest in the single-stage halogenation and oxyhalogenation continued owing to the simplicity of operation. , Since the 1960s, several new concepts and processes have emerged, including halogen-mediated alkane dehydrogenation, − halogenation of alkanes by interhalogen compounds, − zeolite-catalyzed coupling of methyl halides (CH 3 X) to higher hydrocarbons, , high-temperature pyrolysis of methyl halides to chemicals, superacid-aided selective alkane halogenation, , FeBr 3 -based methane-to-methanol, and integrated bromine-mediated light alkane transformation to chemicals and fuels. , Catalyzed oxybromination of light alkanes regained much research interest in recent years. − Among these, only the bromine-aided upgrading process was demonstrated at a pilot scale. , It should be emphasized that the implementation of a halogen-mediated process relies on a number of factors, such as the availability and efficiency of utilization of feedstocks, halogen recycling technologies, management of corrosion issues, etc. The renaissance in this well-known area could be ascribed to the recent developments in the above-mentioned field.…”

Experimental study of the kinetics of reaction of chlorine atoms with tetrahydrofuran and fully deuterated tetrahydrofuran

“…The value of the overall rate constant k X can be calculated when the temperature dependence of k 3 is known. The reference reaction C 3 H 8 + Cl has been a subject of many reviews 4,11,12 and experimental [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] studies. The most recent review for the rate constant of the reference reaction made in the temperature range of 200-700 K by Atkinson et al 4 corresponds to the temperature range of our study.…”

“…The reference reaction C 3 H 8 + Cl has been a subject of many reviews 4,11,12 and experimental 13‐31 studies. The most recent review for the rate constant of the reference reaction made in the temperature range of 200‐700 K by Atkinson et al 4 corresponds to the temperature range of our study.…”

Liquid‐phase hydrogen abstraction from chlorinated ethanes by chlorine atoms

“…Mayo [l]. From the early work by Hass, McBee and Weber [2], several studies of hydrogen abstractions from paraffins and their chlorinated compounds by chlorine atoms have been performed either in the gas phase [3,4,5,61 or in the liquid phase [7,8,9,10,113. Nevertheless there have been only few papers permitting a comparison between the reactivity in the two phases [2, 12, 131. Since careful results were available on the gas phase hydrogen abstraction from chloroethanes by chlorine atoms [5] we have extended that work by the study of the liquid phase chlorinations of ethyl chloride, 1,l -dichloroethane and 1,l ,2-trichloroethane in order to measure the ratio of the rates of attack of the chlorine atom on both sides of these molecules.…”