Production of biodiesel using expanded gas solvents

    公开(公告)号:US20060252950A1

    公开(公告)日:2006-11-09

    申请号:US11123607

    申请日:2005-05-06

    IPC分类号: C07C51/43

    摘要: A method of producing an alkyl ester. The method comprises providing an alcohol and a triglyceride or fatty acid. An expanding gas is dissolved into the alcohol to form a gas expanded solvent. The alcohol is reacted with the triglyceride or fatty acid in a single phase to produce the alkyl ester. The expanding gas may be a nonpolar expanding gas, such as carbon dioxide, methane, ethane, propane, butane, pentane, ethylene, propylene, butylene, pentene, isomers thereof, and mixtures thereof, which is dissolved into the alcohol. The gas expanded solvent may be maintained at a temperature below, at, or above a critical temperature of the expanding gas and at a pressure below, at, or above a critical pressure of the expanding gas.

    Enhancement of alkylation catalysts for improved supercritical fluid regeneration

    公开(公告)号:US20060100089A1

    公开(公告)日:2006-05-11

    申请号:US10986742

    申请日:2004-11-11

    IPC分类号: B01J21/20

    摘要: A method of modifying an alkylation catalyst to reduce the formation of condensed hydrocarbon species thereon. The method comprises providing an alkylation catalyst comprising a plurality of active sites. The plurality of active sites on the alkylation catalyst may include a plurality of weakly acidic active sites, intermediate acidity active sites, and strongly acidic active sites. A base is adsorbed to a portion of the plurality of active sites, such as the strongly acidic active sites, selectively poisoning the strongly acidic active sites. A method of modifying the alkylation catalyst by providing an alkylation catalyst comprising a pore size distribution that sterically constrains formation of the condensed hydrocarbon species on the alkylation catalyst or by synthesizing the alkylation catalyst to comprise a decreased number of strongly acidic active sites is also disclosed, as is a method of improving a regeneration efficiency of the alkylation catalyst.

    Enhancement of alkylation catalysts for improved supercritical fluid regeneration
    4.
    发明授权
    Enhancement of alkylation catalysts for improved supercritical fluid regeneration 有权
    用于改进超临界流体再生的烷基化催化剂的增强

    公开(公告)号:US07592282B2

    公开(公告)日:2009-09-22

    申请号:US10986742

    申请日:2004-11-11

    摘要: A method of modifying an alkylation catalyst to reduce the formation of condensed hydrocarbon species thereon. The method comprises providing an alkylation catalyst comprising a plurality of active sites. The plurality of active sites on the alkylation catalyst may include a plurality of weakly acidic active sites, intermediate acidity active sites, and strongly acidic active sites. A base is adsorbed to a portion of the plurality of active sites, such as the strongly acidic active sites, selectively poisoning the strongly acidic active sites. A method of modifying the alkylation catalyst by providing an alkylation catalyst comprising a pore size distribution that sterically constrains formation of the condensed hydrocarbon species on the alkylation catalyst or by synthesizing the alkylation catalyst to comprise a decreased number of strongly acidic active sites is also disclosed, as is a method of improving a regeneration efficiency of the alkylation catalyst.

    摘要翻译: 一种改性烷基化催化剂以减少其上的稠合烃物质形成的方法。 该方法包括提供包含多个活性位点的烷基化催化剂。 烷基化催化剂上的多个活性位点可以包括多个弱酸性活性位点,中间酸性活性位点和强酸性活性位点。 碱被吸附到多个活性位点的一部分,例如强酸性活性位点,选择性地中毒强酸性活性位点。 还公开了通过提供烷基化催化剂来改性烷基化催化剂的方法,所述烷基化催化剂包含空间上约束烷基化催化剂上的稠合烃物质的形成的孔径分布,或通过合成烷基化催化剂以包含减少数量的强酸性活性位点, 以及提高烷基化催化剂的再生效率的方法也是如此。