- Metal-free photocatalytic aerobic oxidation of biomass-based furfural derivatives to prepare γ-butyrolactone
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Efficient catalytic oxidative C-C bond cleavage with dioxygen is useful and challenging to prepare oxygenated fine chemicals from biomass. Herein, we report a catalytic strategy for the preparation of γ-butyrolactone (GBL) by photocatalytic oxidation of tetrahydrofurfuryl alcohol (THFA), tetrahydrofurfuric acid (THFCA), or other furfural derivatives at room temperature under visible-light irradiation. Metal-free mesoporous graphitic carbon nitride was used as the photocatalyst and O2was used as the oxidant. The effects of various semiconductor catalysts, light sources with different wavelengths, and the reaction time on the photocatalytic oxidation of THFA to GBL were separately investigated. Furthermore, the reaction mechanism was investigated through serious control experiments and the reaction pathway was investigated through density functional theory (DFT) calculations.
- Zhu, Rui,Zhou, Gongyu,Teng, Jia-Nan,Liang, Wanying,Li, Xinglong,Fu, Yao
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supporting information
p. 1758 - 1765
(2021/03/09)
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- CONVERSION OF 1,2,5,6-HEXANETETROL (HTO) TO TETRAHYDROFURAN DICARBOXYLIC ACID (THFDCA)
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Disclosed herein are methods for synthesizing useful intermediates and/or products from 1,2,5,6-hexanetetrol (HTO), which itself can be derived from a sugar. In an aspect, a process is provided for production of THFDCA from 1,2,5,6-hexanetetrol (HTO). The process comprises the steps of (a) ring closing to form a ring compound and (b) oxidizing using a catalyst comprising platinum and bismuth to form an acid mixture. Step (a) may be performed before or after step (b).
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Paragraph 44
(2019/11/04)
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- Catalytic transformation of 2,5-furandicarboxylic acid to adipic acid over niobic acid-supported Pt nanoparticles
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The conversion of biomass-derived molecules into adipic acid represents a highly attractive green route for sustainable production of adipic acid, a key monomer of nylon 66 and polyurethane. Here, we report the direct synthesis of adipic acid from 2,5-furandicarboxylic acid, which can be obtained from cellulose-based 5-hydroxymethylfurfural, using a niobic acid-supported platinum catalyst under hydrogen in water.
- Wei, Longfu,Zhang, Junxian,Deng, Weiping,Xie, Shunji,Zhang, Qinghong,Wang, Ye
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supporting information
p. 8013 - 8016
(2019/07/12)
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- PROCESS FOR THE MANUFACTURE OF AN ADIPIC ACID PRODUCT
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Process for the manufacture of an adipic acid product by a reduction of a tetrahydrofuran dicarboxylic acid compound, wherein the tetrahydrofuran dicarboxylic acid compound is contacted with hydrogen iodide at a temperature of at least 100°C in an inert atmosphere to yield the adipic acid product.
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Page/Page column 8
(2017/05/14)
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- PURIFYING CRUDE FURAN 2,5-DICARBOXYLIC ACID BY HYDROGENATION
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A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) by hydrogenation of a FDCA composition dissolved in a hydrogenation solvent such as water, and hydrogenating under mild conditions, such as at a temperature within a range of 130°C to 225°C by contacting the solvated FDCA composition with hydrogen in the presence of a hydrogenation catalyst under a hydrogen partial pressure within a range of 10 psi to 900 psi. A product FDCA composition is produced having a low amount of tetrahydrofuran dicarboxylic acid, a low b*, and a low amount of 5-formyl furan-2-carboxylic acid (FFCA).
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Page/Page column 42-43
(2014/01/09)
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- Production of Adipic Acid and Derivatives from Carbohydrate-Containing Materials
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The present invention generally relates to processes for the chemocatalytic conversion of a carbohydrate source to an adipic acid product. The present invention includes processes for the conversion of a carbohydrate source to an adipic acid product via a furanic substrate, such as 2,5-furandicarboxylic acid or derivatives thereof. The present invention also includes processes for producing an adipic acid product comprising the catalytic hydrogenation of a furanic substrate to produce a tetrahydrofuranic substrate and the catalytic hydrodeoxygenation of at least a portion of the tetrahydrofuranic substrate to an adipic acid product. The present invention also includes products produced from adipic acid product and processes for the production thereof from such adipic acid product.
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Page/Page column 8
(2010/12/29)
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