629-11-8Relevant articles and documents
Determining Roles of Cu0 in the Chemosynthesis of Diols via Condensed Diester Hydrogenation on Cu/SiO2 Catalyst
Wang, Weichao,Wang, Hui,Zhang, Jingwei,Kong, Lingxin,Huang, Huijiang,Liu, Wei,Wang, Shengping,Ma, Xinbin,Zhao, Yujun
, p. 3849 - 3852 (2020)
Copper-based catalyst was applied in the condensed diester hydrogenation with unexpected high selectivity (~100 percent) to 1,6-hexanediol. On basis of the mass transfer analysis and kinetics results, the reaction rate of the condensed diester hydrogenation was deduced to be controlled by the activation of hydrogen on Cu0 sites, which was further demonstrated by the correlations between the catalytic activity and different copper species. Importantly, this catalysis mechanism is different with that of gas-phase diester hydrogenation, which is generally determined by the adsorption of ester on Cu+ species.
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Raphael,Roxburgh
, p. 3875 (1952)
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Synthesis of Supported RhMo and PtMo Bimetallic Catalysts by Controlled Surface Reactions
Alba-Rubio, Ana C.,Sener, Canan,Hakim, Sikander H.,Gostanian, Thomas M.,Dumesic, James A.
, p. 3881 - 3886 (2015)
We previously described a synthesis method to prepare bimetallic catalysts with narrow nanoparticle size and composition distributions by means of controlled surface reactions (CSR) between a reduced supported metal nanoparticle and an organometallic precursor of an oxophilic promoter metal. Herein, we report a comparison of such catalysts with those prepared by traditional incipient wetness impregnation. STEM/EDS analysis indicates that catalysts prepared by CSR exhibit more effective interaction of metals, thereby minimizing the undesirable formation of component-rich nanoparticles and/or monometallic domains. Reaction kinetics studies using these bimetallic catalysts reveal that optimal conversion rates in a selective CO hydrogenolysis reaction (i.e., hydrogenolysis of 2-(hydroxymethyl)tetrahydropyran to 1,6-hexanediol) could be achieved using a lower amount of the oxophilic promoter metal for the catalysts prepared by the CSR approach, as compared to their impregnated counterparts. A superior method for greater results: At the same conversion rate level, catalysts prepared by controlled surface reactions (CSR) requires smaller amount of promoter as compared to those prepared by incipient wetness impregnation (IWI). This increased performance is attributed to the uniform bimetallic composition of the catalysts prepared by CSR.
Reductive depolymerization of polyesters and polycarbonates with hydroboranes by using a lanthanum(iii) tris(amide) catalyst
Berthet, Jean-Claude,Cantat, Thibault,Kobylarski, Marie
supporting information, p. 2830 - 2833 (2022/03/09)
The homogeneous reductive depolymerization of polyesters and polycarbonates with hydroboranes is achieved with the use of an f-metal complex catalyst. These polymeric materials are transformed into their value-added alcohol equivalents. Catalysis proceeds readily, under mild conditions, with La[N(SiMe3)2]3 (1 mol%) and pinacolborane (HBpin) and shows high selectivity towards alcohols and diols, after hydrolysis.
Interworking ligand, hydroformylation catalyst and preparation method of dihydric alcohol
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Paragraph 0071; 0079-0080, (2021/07/09)
The invention discloses an interworking ligand, a hydroformylation catalyst and a preparation method of dihydric alcohol. The interworking ligand comprises a ligand unit I and a ligand unit II, has the characteristics of a bidentate phosphine ligand, and is high in catalytic activity and good in stability; and when the catalyst is used for preparing dihydric alcohol from olefin, linear alcohol can be obtained through a one-step method, and the content of by-products in a traditional series process is reduced. The method has the advantages of simple and convenient process, low cost and energy consumption, good production safety, high product quality and the like, and is particularly suitable for large-scale industrial production.
Method for preparing 1, 5-pentanediol or 1, 6-hexanediol from bio-based furan compound
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Paragraph 0006; 0021, (2021/06/26)
The invention discloses a method for preparing 1, 5-pentanediol or 1, 6-hexanediol by utilizing a bio-based furan compound, which comprises the following steps of: reacting the bio-based furan compound serving as a raw material for 1-48 hours in a proper solvent under the conditions of pressure of 0.5-10 MPa and temperature of 20-200 DEG C in a reducing gas atmosphere under the action of a catalyst, separating the catalyst, and distilling out the solvent to obtain the target product 1,5-pentanediol or 1, 6-hexanediol. According to the method disclosed by the invention, efficient conversion of the bio-based furan compound is realized under relatively mild and environment-friendly conditions by utilizing chemically synthesized renewable resource bio-based furan, and the produced 1, 5-pentanediol or 1, 6-hexanediol is a polymer monomer, so that the application range of the bio-based furan compound is expanded, the comprehensive utilization of the straws is further promoted, and carbon neutralization is promoted.