Conversion of Butylene into Aromatics

Weizmann, Chaim; Henri, Victor; Bergmann, Ernst D.

doi:10.1021/ie50502a041

Cited by 3 publications

(3 citation statements)

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“…The work of Badger and Kimber in their definitive mechanistic studies on the pyrolysis of arylalkenes, accounts for the pyrogenesis of the arenes identified and requires butadiene as their precursor (20). The pyrolysis of butadiene itself has been reported to yield ethylbenzene and styrene as well as naphthalene and tetralin (21). In the results reported herein, the origin of butadiene is proposed to derive from the piperidyl moiety (as in eq.…”

Section: Resultsmentioning

confidence: 84%

Pyrolysis products of 1-(1-phenylcyclohexyl)piperidine (PCP)

Beaver¹,

Jones²

1984

Can. J. Chem.

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. 62, 1022 (1984).PCP was pyrolyzed in air at 400°, 600". and 800°C and the yield of HCN produced was barely detectable at 400°C, 2.3% at 600°C, and 5.1% at 800°C. Gas chromatography (gc) and gclmass spectrometry (gclms) showed the only pyrolysis products produced at 400°C to be phenylcyclohexane and 1-phenylcyclohexene with 60-70% of the PCP recovered. Only trace amounts of PCP survived the 600°C pyrolysis, the majority of the pyroproducts being polynuclear aromatics (PNAs) with three or fewer rings. The 800°C pyrolysis yielded minor amounts of four-ring PNAs, the remainder being similar to the 600°C products but differing in the relative amounts. Minor amounts of aza-arenes were produced in the 600°C and 800°C pyrolyses and separation techniques are described. On a effectuC la pyrolyse de la PCP dans I'air a des ternpkratures de 400, 600 et 800°C; les rendements en HCN, qui sont a peine dktectables a 400°C, sont respectivement de 2,3% et 5,1% 600 et 800°C. A I'aide de la chromatographie en phase gazeuse (cpg) et de la cpglspectromCtrie de masse (cpglsm), on a pu montrer que les seuls produits de pyrolyse a 400°C sont le phCnylcyclohexane et le phCnyl-l cyclohexkne alors que l'on rCcuptre 60-70% de la PCP. I1 n'y a que des traces de PCP qui survivent a la pyrolyse i 600°C; la majorit6 des produits formks sont des composCs aromatiques polycondensCs (APC) comportant au maximum trois cycles. Les pyrolyses 800°C conduisent a de faibles quantitCs de composCs APC comportant qua&e cycles; le reste des produits est qualitativement le mCme quoique I'on peut observer des diffkrences au point be vue quantitatif. Au cours des pyrolyses 600 et 800°C, il se produit de faibles quantitCs d'aza-arenes; on dCcrit les techniques de skparation.[Traduit par le journal]

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Section: Resultsmentioning

confidence: 84%

Pyrolysis products of 1-(1-phenylcyclohexyl)piperidine (PCP)

Beaver¹,

Jones²

1984

Can. J. Chem.

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“…The expense and the political implications of dealing with the petrochemical industiy have led to recent interest in reviving the Weizmann process (34). Weizmann foresaw the rise of modem petrochemical processes, and on many occasions he stressed the political desirability for countries {especially those poor in natural oil) to replace a petroleum-based chemical industry with one based on fermentation (35).…”

Section: Strategic Possibilties With Fermentationmentioning

confidence: 99%

Chaim Weizmann (1874-1952): Chemist, Biotechnologist, and Statesman: The Fateful Interweaving of Political Conviction and Scientific Talent

Kauffman¹,

Mayo²

1994

J. Chem. Educ.

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“…In a comprehensive study of high temperature decomposition of hydrocarbons in packed tubes Weizmann (117)(118)(119)(120)(121)(122)(123)(124)(125)(126)(127)(128)(129)(130) indicates that pure, or almost pure, aromatic liquid products are obtainable at temperatures of 630°to 680°C ., at pressures of 1 to 3 atmospheres and at liquid hourly space velocities of 0.05 to 0.5. Copper is the preferred packing material because it minimizes carbon formation.…”

Section: Inmentioning

confidence: 99%