中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

2947 records (took 0.028 seconds)

    Heterogeneous catalyst with multicatalytic activity
    1.
    发明授权
    Heterogeneous catalyst with multicatalytic activity 有权

    公开(公告)号：US12269019B2

    公开(公告)日：2025-04-08

    申请号：US17884505

    申请日：2022-08-09

    Applicant: INSTITUTO MEXICANO DEL PETRÓLEO

    Inventor： José Manuel Domínguez Esquivel ,  Alma Delia Miranda Olvera ,  Miguel Ángel Vázquez Guevara ,  Adriana del Carmen Galván Cabrera ,  Merced Martínez Rosales

    IPC: B01J31/02 ,  B01J21/08

    Abstract: In this invention is described: a) the preparation of a new heterogeneous catalyst based on mesoporous silica with variable geometry of pore arrangement, covalently functionalized by an ionic liquid and as a counterion a tungsten polyoxometalate (Keggin acid); b) the application of this catalyst with dual action: Bronsted-Lowry acid and oxidizing agent; and c) its application in chemical reactions is described as: condensation, oxidation, polymerization, and esterification. This type of catalyst offers the following advantages in the chemical industry 1) reusable; 2) promotes different transformations in a single stage, attributed to their acidic and oxidizing characteristics (dual action); and 3) efficiency in the chemical transformations described, which allow to obtain precursors of homogeneous hydroprocessing catalysts, of interest for some projects of transformation of heavy crude oils in situ.

    SIMULTANEOUS DEHYDRATION, DIMERIZATION, AND METATHESIS OF C2-C5 ALCOHOLS
    7.
    发明申请
    SIMULTANEOUS DEHYDRATION, DIMERIZATION, AND METATHESIS OF C2-C5 ALCOHOLS 有权

    公开(公告)号：US20240409479A1

    公开(公告)日：2024-12-12

    申请号：US18631651

    申请日：2024-04-10

    Applicant: Gevo, Inc.

    Inventor： Jonathan Smith ,  Madeline Sjodin

    IPC: C07C1/24 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J23/30 ,  B01J29/40 ,  C07C2/12 ,  C07C6/04 ,  C10G3/00

    Abstract: This disclosure relates to a single stage process for the direct conversion of alcohols, e.g. ethanol, to olefinic mixtures (C2-C7) with low levels of aromatics carried out in a single reactor with two fixed catalyst beds in series, or two catalytic fixed bed reactors in series wherein the first reactor operates at a lower or higher temperature than the operating temperature of the second reactor. The process transformation of ethanol is comprised of ethanol dehydration to ethylene and water in high yield with the first catalyst in the first reactor, or via the first fixed catalyst bed, followed by directly feeding the ethylene and water to the second reactor, or second fixed catalyst bed, with conversion of said ethylene and water to a C2-C7 olefinic mixture with the second catalyst(s) in high yields with minimal aromatic compound formation.

    CATALYSTS
    10.
    发明申请
    CATALYSTS 有权

    公开(公告)号：US20240399354A1

    公开(公告)日：2024-12-05

    申请号：US18732262

    申请日：2024-06-03

    Applicant: Board of Regents, The University of Texas System

    Inventor： Pawarat BOOTPAKDEETAM ,  Wilaiwan Chanmanee ,  Brian H. Dennis ,  Frederick M. Macdonnell

    IPC: B01J35/30 ,  B01J21/08 ,  B01J23/72 ,  B01J35/50 ,  B01J35/55 ,  B01J37/02 ,  B01J37/12

    Abstract: Two different types of catalysts are disclosed. The first catalyst has a porous support that is impregnated with an active metal catalyst. The support surrounds a metallic core, which functions to increase the bulk heat capacity of the catalyst, thereby damping temperature swings during use. The second catalyst also has a porous support that is impregnated with an active metal catalyst, which is heterogeneously distributed so that the catalyst is concentrated at or near the surface of the support structure. This is accomplished by impregnating the catalyst by pouring a molten metal catalyst over the bulk catalyst supports. This method allows of a small volume of molten catalyst relative to the pore volume of the support and concentrates the catalyst in a band near the surface of the supports.

Patent Agency Ranking