Alkylation Of Biphenyl Research Articles

Advances in the Design of Pillared Clay Catalysts by Surfactant and Polymer Modification

ABSTRACTThe catalytic properties of pillared clays for organic chemical conversions, especially those occurring in liquid media, can be substantially improved by surfactant modification of the pore structure during the pillaring reaction. For instance, the incorporation of a non-ionic surfactant, such as the alkylated polyethylene oxide C12–14H25–29O(CH2CH2O)5H, in the synthesis of alumina pillared montmorillonite results in a dramatic increase in the interparticle (textural) mesoporosity of the final calcined products. These surfactant-modified mesoporous pillared clays are exceptionally active as catalysts for the diffusion controlled liquid phase alkylation of biphenyl. The enhanced mesoporosity facilitates access of the reactants to the active acid sites in the interlayer nanopores of the pillared clay tactoids. Organic polymeric molecules also can be used to mediate the pore structure of pillared clay materials. The reaction of aluminum chlorohydrate oligomers with Na+ rectorite in the presence of polyvinyl alcohol as a pillaring precursor affords a supergallery alumina pillared rectorite with a basal spacings of 52 Å and a corresponding gallery height of 33 Å under air- dried conditions. A stable gallery height of 23 Å is observed even after treatment with 100% steam at 800°C for 17 hour. The new supergallery intercalate is characterized by a surface area, pore volume, and catalytic cracking activity superior to conventional alumina pillared rectorite and related smectites with 9 Å gallery heights.

Propene alkylation of biphenyl catalyzed by alumina pillared clays and related acidic oxides

Propene alkylation of biphenyl was catalyzed by alumina pillared clays, and, for comparison, by several other oxide acids including an alumina delaminated clay, an acid washed clay (K-10 montmorillonite) and zeolites (USY and H-mordenite). Relationships between pore structures and catalytic properties were investigated. The microporous catalysts afforded high yields of meta- and para-alkylated isomers at the expense of the more spatially demanding ortho-alkylated isomer.

Alkylation of Biphenyl under Mild Friedel-Crafts Conditions

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkylation of Biphenyl under Mild Friedel-Crafts ConditionsDuane B. PriddyCite this: Ind. Eng. Chem. Prod. Res. Dev. 1969, 8, 3, 239–241Publication Date (Print):September 1, 1969Publication History Published online1 May 2002Published inissue 1 September 1969https://doi.org/10.1021/i360031a005RIGHTS & PERMISSIONSArticle Views626Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (293 KB) Get e-Alerts

Alkylation of Biphenyl Using Alkyl Sulfates in Friedel—Crafts Syntheses

Alkylation of Biphenyl Using Alkyl Sulfates in Friedel—Crafts Syntheses