Direct Catalytic Conversion of Methylcyclopentane to Benzene

Greensfelder, B. S.; Fuller, Daniel L.

doi:10.1021/ja01228a033

Cited by 4 publications

(2 citation statements)

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“…Considerable w'ork has been done by on the reactions of cyclopentane derivatives in the presence of hydrogen and using active dehydrogenation catalysts, such as platinized carbon. Whereas at high temperatures and in the presence of molybdena-alumina catalyst methylcyelopentane is converted to benzene (72), low temperature operation at atmospheric pressure using platinized carbon produces ring opening with the formation of paraffin hydrocarbons. It was found that the ring opening occurs in positions not immediately adjacent to tlio location of the substituent group.…”

Section: Catalytic Reforming-chemical Conceptsmentioning

confidence: 99%

Pyrolysis of Hydrocarbons

Haensel¹,

Sterba²

1948

Ind. Eng. Chem.

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THISreview is intended to serve as a summary of literature references in the specific field of hydrocarbon decomposition reactions practiced commercially on a very wide scale by the petroleum industry. It covers the period 1940 through 1947 and includes both thermal and catalytic techniques as they are applied in the cracking of light hydrocarbons; processing of petroleum fractions in the gasoline boiling range (reforming); and decomposition of hydrocarbon materials heavier than gasoline. Dehydrogenation of both gaseous and liquid hydrocarbons, construed as a special type of decomposition reaction, also is treated in this review. The basic chemical change involved in the decomposition of hydrocarbons is the breaking of carbon-carbon and carbon-hydrogen bonds. In some cases the decomposition involves the formation of new carbon-carbon bonds without breakage of the old bonds. For example, in cyclization of nheptane to toluene new carbon-carbon bonds are formed and the original bonds are not destroyed. However, there is a loss of hydrogen and from that standpoint alone the over-all reaction will be considered as that of decomposition.The period since 1940 is characterized by the appearance in and acceptance by the industry of a wide variety of catalytic processes for all types of decomposition reactions. Progress in this field, as noted in the literature and in the refineries, is largely in catalytic technique, whereas thermal processing appears to have become more standardized with emphasis on accurate design and reducing operating costs. The important function of decomposition reactions has been the production of gasoline. It becomes impractical to increase the octane number of gasolines above certain values and within economic limits by thermal processes. Octane number requirements above those obtainable

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Section: Catalytic Reforming-chemical Conceptsmentioning

confidence: 99%

Pyrolysis of Hydrocarbons

Haensel¹,

Sterba²

1948

Ind. Eng. Chem.

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“…As mentioned in last year's review (20), it is possible to carry out the isomerization and dehydrogenation reactions in a single step (10). Although the isomerization equilibrium is not particularly favorable at the relatively high temperatures required for dehydrogenation, the removal of cyclohexane by dehydrogenation allows isomerization to proceed.…”

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confidence: 99%