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    PROCESS FOR THE PREPARATION OF TRANSITION METAL NANOPARTICLES
    1.
    发明申请
    PROCESS FOR THE PREPARATION OF TRANSITION METAL NANOPARTICLES 有权

    公开(公告)号：US20230139787A1

    公开(公告)日：2023-05-04

    申请号：US17911825

    申请日：2021-03-19

    申请人： BASF CORPORATION

    发明人： Daniela Risica ,  Giovanni Iacono

    IPC分类号： B22F9/24 ,  B22F1/0545 ,  B01J23/44 ,  B01J21/18 ,  B01J35/00 ,  B01J37/04 ,  B01J37/03 ,  B01J37/00 ,  C07C45/62

    摘要： A process for the preparation of transition metal nanoparticles, the process comprising: (a) providing a mixture comprising one or more salts of one or more transition metals M, one or more complexing agents C, and a solvent system S; (b) optionally adjusting the pH of the mixture provided in (a) to a pH comprised in the range of from 4 to 8; (c) heating the mixture provided in (a) or obtained in (b) for obtaining a colloidal suspension of transition metal nanoparticles; (d) optionally isolating the transition metal nanoparticles obtained in (c), preferably by centrifugation and/or evaporation to dryness of the colloidal suspension obtained in (c) wherein the mixture provided in (a) and heated in (c) or obtained in (b) and heated in (c) does not comprise polyvinyl sulfate and/or polyvinylpyrrolidone.

    Selective hydrogenation methods and catalysts
    2.
    发明授权
    Selective hydrogenation methods and catalysts 有权

    公开(公告)号：US11623902B2

    公开(公告)日：2023-04-11

    申请号：US16660119

    申请日：2019-10-22

    申请人： Clariant International Ltd

    发明人： Darren Adams ,  Mingyong Sun ,  Uwe Duerr ,  Denise Cooper ,  Brian Heasley ,  Ling Xu ,  Tina Clinton

    IPC分类号： C07C5/09 ,  B01J31/02 ,  B01J31/28 ,  B01J21/04 ,  B01J23/44 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  B01J23/50

    摘要： The present disclosure relates to methods for selectively hydrogenating acetylene, to methods for starting up a selective hydrogenation reactor, and to hydrogenation catalysts useful in such methods. In one aspect, the disclosure provides a method for selectively hydrogenating acetylene, the method comprising contacting a catalyst composition with a process gas. The catalyst composition comprises a porous support, palladium, and one or more ionic liquids. The process gas includes ethylene, present in the process gas in an amount of at least 20 mol. %; and acetylene, present in the process gas in an amount of at least 1 ppm. At least 90% of the acetylene present in the process gas is hydrogenated, and the selective hydrogenation is conducted without thermal runaway. Notably, the process gas is contacted with the catalyst at a gas hourly space velocity (GHSV) based on total catalyst volume in one bed or multiple beds of at least 7,100 h−1.

    PREPARATION METHOD OF MONOMETALLIC OR BIMETALLIC NANOPARTICLE-SUPPORTED CATALYST
    3.
    发明申请
    PREPARATION METHOD OF MONOMETALLIC OR BIMETALLIC NANOPARTICLE-SUPPORTED CATALYST 有权

    公开(公告)号：US20230100948A1

    公开(公告)日：2023-03-30

    申请号：US17951419

    申请日：2022-09-23

    申请人： Chongqing Research Academy of Eco-Environmental Sciences

    发明人： Wei HU ,  Yaoqiang CHEN ,  Rui YUAN ,  Dan ZHANG

    IPC分类号： B01J23/44 ,  B01J23/10 ,  B01J23/02 ,  B01J35/00 ,  B01J37/02 ,  B01J37/04 ,  B01J37/03 ,  B01J37/00 ,  B01J37/06 ,  B01J37/08

    摘要： The present disclosure provides a preparation method of a monometallic or bimetallic nanoparticle-supported catalyst. The synthesis of metal nanoparticles with different shapes, sizes, and atomic structures is affected by nucleation and growth rates. In the present disclosure, by changing a ratio of strong and weak reducing agents, a suitable double reducing agent is provided for metal nanoparticles with different reduction potentials, where the strong reducing agent is used for rapid nucleation and the weak reducing agent is used for the growth of metal nanoparticles. Accordingly, modulation and control of the nucleation and growth rates can be realized during the synthesis of nanoparticles. In addition, through multiple actions of a combination of reducing agents with different reduction intensities, monometallic/bimetallic nanoparticles of different sizes, shapes, and atomic structures are controllably prepared, which are then supported with a carrier to obtain the monometallic or bimetallic nanoparticle-supported catalyst.

    Hydrophobic palladium/metal organic framework material, preparation method thereof, and application therefor for use in synthesizing 2,5-dimethylfuran
    5.
    发明授权
    Hydrophobic palladium/metal organic framework material, preparation method thereof, and application therefor for use in synthesizing 2,5-dimethylfuran 有权

    公开(公告)号：US11584729B2

    公开(公告)日：2023-02-21

    申请号：US16499364

    申请日：2017-10-18

    申请人： NANJING AGRICULTURAL UNIVERSITY

    发明人： Zhen Fang ,  Hu Li

    IPC分类号： C07D307/36 ,  B01J2/30 ,  B01J20/22 ,  B01J20/30 ,  B01J20/32 ,  B01J23/44 ,  B01J31/16

    摘要： A hydrophobic palladium/metal organic framework (MOF) material, which is a solid catalyst material obtained by taking a porous MOF as a carrier, introducing elementary palladium by means of an immersion-reduction method, and performing polydimethylsiloxane coating layer processing. A method which uses hydrophobic palladium/MOF material to selectively catalyze hexoses to prepare 2,5-dimethylfuran comprises: dissolving a hexose into an alcohol; using the hydrophobic palladium/MOF material as a catalyst and polymethylhydrosiloxane as a hydrogen donor, reacting at 70 to 130° C. for 0.25 to 12 h under the action of an acidic additive; the concentration of the hexose in the alcohol is 0.2 to 10 wt %, and the total amount of Pd contained in the hydrophobic palladium/MOF material relative to a hexose is 0.1 to 5 mol %. The hydrophobic palladium/MOF material has a stable structure, and under the same conditions, has a catalyzing efficiency which is significantly higher than that of commercially available palladium on carbon and common palladium/MOF materials.

    METHOD OF PREPARING SOLID-SUPPORTED PALLADIUM CATALYST
    6.
    发明申请
    METHOD OF PREPARING SOLID-SUPPORTED PALLADIUM CATALYST 有权

    公开(公告)号：US20230029112A1

    公开(公告)日：2023-01-26

    申请号：US17929166

    申请日：2022-09-01

    申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

    发明人： M. Nasiruzzaman SHAIKH

    IPC分类号： B01J23/44 ,  B01J37/16 ,  B01J37/04 ,  B01J37/08 ,  B01J35/00 ,  B01J31/06 ,  C07C1/26 ,  B01J35/02

    摘要： A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., K2PdCl4 with NaBH4 in water, and then used this as a “dip catalyst.” The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h−1, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h−1, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.

    METAL-SEMICONDUCTOR HYBRID STRUCTURES, SYNTHESES THEREOF, AND USES THEREOF
    9.
    发明申请
    METAL-SEMICONDUCTOR HYBRID STRUCTURES, SYNTHESES THEREOF, AND USES THEREOF 有权

    公开(公告)号：US20220410130A1

    公开(公告)日：2022-12-29

    申请号：US17899535

    申请日：2022-08-30

    申请人： Honda Motor Co., Ltd.

    发明人： Shutang CHEN ,  Gugang CHEN

    IPC分类号： B01J23/52 ,  B01J23/44 ,  B01J35/02 ,  B01J23/42 ,  B01J27/04

    摘要： Aspects of the present disclosure generally relate to semiconductor nanoparticles, metal-semiconductor hybrid structures, processes for producing semiconductor nanoparticles, processes for producing metal-semiconductor hybrid structures, and processes for producing conversion products. In an aspect is provided a process for producing a metal-semiconductor hybrid structure that includes introducing a first precursor comprising a metal from Group 11-Group 14 to an amine and an anion precursor to form a semiconductor nanoparticle comprising the Group 11-Group 14 metal; introducing a second precursor comprising a metal from Group 7-Group 11 to the semiconductor nanoparticle to form a metal-semiconductor mixture; and introducing the metal-semiconductor mixture to separation conditions to produce the metal-semiconductor hybrid structure. In another aspect is provided a metal-semiconductor hybrid structure that includes a first component comprising a metal from Group 11-Group 14 and an element from Group 15-Group 16; and a second component comprising a metal from Group 7-Group 11.