Methods of making levulinic acid and alkyl levulinates from saccharides

    公开(公告)号:US10125079B2

    公开(公告)日:2018-11-13

    申请号:US15403751

    申请日:2017-01-11

    Abstract: Unique methods have been developed to convert polysaccharides into value-added products, such as levulinic acid and alkyl levulinates. The polysaccharides are heated in the presence of water, an alcohol, and an acid to cleave the polysaccharide, and the resulting monosacchrides or monosaccharide acetals or both are contacted with an acid in the presence of an alcohol at a higher temperature. Useful acids include Brønsted acid catalysts and Lewis acid catalysts including mineral acids, metal halides, immobilized heterogeneous catalysts functionalized with a Brønsted acid group or a Lewis acid group, or combinations thereof.

    Methods and Compositions for Preparing Triglycerides Containing Fatty Acid Vicinal Diester Functionality

    公开(公告)号:US20180216028A1

    公开(公告)日:2018-08-02

    申请号:US15578600

    申请日:2016-05-31

    Abstract: A method for producing a triglyceride including fatty acids with vicinal diesters: (a) providing a triglyceride including fatty acids with epoxide groups; (b) reacting the epoxide groups with carboxylic acid salts under basic conditions to produce a triglyceride including fatty acids with vicinal ester/alkoxides; (c) protonating the vicinal ester/alkoxides to produce a triglyceride including fatty acids with vicinal ester/alcohols; and (d) reacting the vicinal ester/alcohols with carboxylic acids under acidic conditions to produce a triglyceride including fatty acids with vicinal diesters.

    Process for recovering and recycling a catalyst

    公开(公告)号:US09968925B2

    公开(公告)日:2018-05-15

    申请号:US15052057

    申请日:2016-02-24

    CPC classification number: B01J38/48 B01D15/00 B01J27/128 C08G18/36 C11C3/00

    Abstract: A process of recovering and recycling a catalyst includes feeding an epoxidized fatty acid ester, a solvent, and a catalyst to a reactor. The solvent is reacted with the epoxidized fatty acid ester to open epoxy rings of the ester and produce a polyol. Some unreacted solvent remains after the reaction. The unreacted solvent is separated from a mixture of the polyol and the catalyst. The polyol/catalyst mixture is passed to an adsorption bed so that the catalyst is adsorbed and the polyol passes through the bed. The polyol is recovered. The adsorption bed is rinsed with the unreacted solvent to desorb the catalyst and obtain a mixture of the solvent and the catalyst. The mixture of solvent and catalyst is recycled to the reactor for further reaction.

    Process For Recovering And Recycling A Catalyst
    17.
    发明申请
    Process For Recovering And Recycling A Catalyst 有权
    回收再循环催化剂的方法

    公开(公告)号:US20160250627A1

    公开(公告)日:2016-09-01

    申请号:US15052057

    申请日:2016-02-24

    CPC classification number: B01J38/48 B01D15/00 B01J27/128 C08G18/36 C11C3/00

    Abstract: A process of recovering and recycling a catalyst includes feeding an epoxidized fatty acid ester, a solvent, and a catalyst to a reactor. The solvent is reacted with the epoxidized fatty acid ester to open epoxy rings of the ester and produce a polyol. Some unreacted solvent remains after the reaction. The unreacted solvent is separated from a mixture of the polyol and the catalyst. The polyol/catalyst mixture is passed to an adsorption bed so that the catalyst is adsorbed and the polyol passes through the bed. The polyol is recovered. The adsorption bed is rinsed with the unreacted solvent to desorb the catalyst and obtain a mixture of the solvent and the catalyst. The mixture of solvent and catalyst is recycled to the reactor for further reaction.

    Abstract translation: 回收和再循环催化剂的方法包括将环氧化脂肪酸酯,溶剂和催化剂进料到反应器中。 使溶剂与环氧化脂肪酸酯反应以打开酯的环氧环,并产生多元醇。 反应后残留有一些未反应的溶剂。 将未反应的溶剂与多元醇和催化剂的混合物分离。 将多元醇/催化剂混合物通入吸附床,使得催化剂被吸附并且多元醇通过床。 回收多元醇。 吸附床用未反应的溶剂冲洗以解吸催化剂,得到溶剂和催化剂的混合物。 将溶剂和催化剂的混合物再循环到反应器中以进一步反应。

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