Patent classifications
B01J2531/845
Stabilization of active metal catalysts at metal-organic framework nodes for highly efficient organic transformations
Metal-organic framework (MOFs) compositions based on postsynthetic metalation of secondary building unit (SBU) terminal or bridging OH or OH.sub.2 groups with metal precursors or other post-synthetic manipulations are described. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations, including the regioselective boryiation and siiylation of benzyiic CH bonds, the hydrogenation of aikenes, imines, carbonyls, nitroarenes, and heterocycles, hydroboration, hydrophosphination, and cyclization reactions. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.
CATALYST COMPOSITION FOR HYDROFORMYLATION AND METHOD OF PREPARING ALDEHYDE USING THE SAME
The present invention relates to a catalyst composition for hydroformylation and a method of preparing an aldehyde using the same. More specifically, the present invention provides a catalyst composition for hydroformylation including a specific phosphite-based ligand and a transition metal compound in a specific amount range, thereby being capable of greatly lowering a use amount of an expensive transition metal compound and exhibiting excellent catalyst activity or stability. In addition, by using the catalyst composition in hydroformylation, excellent reaction efficiency may be provided and iso-aldehyde may be generated in high yield.
Catalyst and related methods involving hydrosilylation and dehydrogenative silylation
A catalyst having a specific structure and a method of preparing the catalyst is disclosed. A composition is also disclosed, which comprises: (A) an unsaturated compound including at least one aliphatically unsaturated group per molecule, subject to at least one of the following two provisos: (1) the (A) unsaturated compound also includes at least one silicon-bonded hydrogen atom per molecule; and/or (2) the composition further comprises (B) a silicon hydride compound including at least one silicon-bonded hydrogen atom per molecule. The composition further comprises (C) the catalyst. A method of preparing a hydrosilylation reaction product and a dehydrogenative silylation reaction product are also disclosed.
Method of Making Colloidal Suspensions of Metal Organic Frameworks in Polymeric Solutions and Uses Thereof
A method for making a metal organic framework suspension is described herein. The method includes providing a hybrid material comprising a nano-crystalline metal organic framework comprising micropores and a mesoporous polymeric material comprising mesopores, wherein the nano-crystalline metal organic framework is homogeneously dispersed and substantially present only within the mesopores or void spaces of the mesoporous polymeric material; and wherein the hybrid material has a weight percentage of the metal organic framework in the range of 5-50% relative to the total weight of the hybrid material. The method includes contacting the hybrid material with a solvent in which the mesoporous polymeric material is soluble, thereby forming a polymeric solution in which the nano-crystalline metal organic framework is substantially homogeneously dispersed and suspended.
HIGH-ACTIVITY DOUBLE-METAL-CYANIDE CATALYST
A high-activity double-metal-cyanide catalyst, a method for fabricating the same, and applications of the same are disclosed. An organic complexing ligand, which is formed via mixing fatty alcohols and alicyclic carbonates, is used to generate a high-activity double-metal-cyanide catalyst. The high-activity double-metal-cyanide catalyst includes at least one double-metal-cyanide compound, at least one organic complexing ligand, and an optional functionalized compound. The double-metal-cyanide catalyst of the present invention has a higher activity than the conventional double-metal-cyanide catalysts. The polyols generated by the present invention has an insignificant amount of high-molecular-weight compounds.
CATALYST, PREPARATION METHOD THEREFOR, ELECTRODE COMPRISING SAME, MEMBRANE-ELECTRODE ASSEMBLY, AND FUEL CELL
A catalyst, a preparation method therefor, an electrode containing the catalyst, a membrane-electrode assembly, and a fuel cell are disclosed. The catalyst contains a support; metal particles supported by the support; and a coating layer located on the metal particles, and includes any one selected from the group consisting of phthalocyanine, M-phthalocyanine (wherein M is a transition metal) and a mixture thereof. The catalyst has improved durability since a coating layer is formed on the surface of a commercial catalyst or a conventional catalyst through a relatively easy method without separate treatment. A carbon coating layer formed by post-treating a catalyst including the coating layer further improves durability. Material transfer ability and performance are also improved by a carbon nanofiber or a carbon nanotube generated during post-treatment.
Methods and compositions for the catalytic upgrading of alcohols
Compositions and methods of use related to metal organic frameworks (MOFs) and/or nanoparticles are generally described. In some embodiments, methods and compositions for the catalytic upgrading of alcohols using MOFs and/or nanoparticles associated with MOFs are generally described. In some embodiments, a catalytic MOF composition is provided, wherein the MOF composition comprises a MOF compound and a plurality of metal catalytic compounds. In some embodiments, an alcohol may be exposed to the MOF composition and/or a plurality of nanoparticles associated with the MOF composition such that the alcohol is converted to a higher order alcohol. Advantageously, in some embodiments, the alcohol conversion occurs at a relatively high turnover frequency and/or with a relatively high selectivity as compared to traditional methods for converting alcohols.
System and Process for Continuous and Controlled Production of Metal-Organic Frameworks and Metal-Organic Framework Composites
A MOF production system and method of making are detailed for continuous and controlled synthesis of MOFs and MOF composites. The system can provide optimized yields of MOFs and MOF composites greater than or equal to 95%.
METHOD FOR PREPARING 1,3-PROPANEDIOL BY COUPLING ETHYLENE OXIDE WITH SYNGAS
A catalytic reaction of ethylene oxide (EO) coupling with syngas to produce 1,3-propanediol (1,3-PDO) is disclosed. The catalytic reaction of EO, carbon monoxide and the alcohol uses a N,O-ligand coordinated metal complex catalyst. The reaction is carried out in an organic solvent in the presence of an additive at the temperature of 30-190 C. and the CO pressure of 1-150 atm for 0.1-200 h to prepare 3-hydroxypropinate (3HP). The catalytic reaction of 3HP with dihydrogen uses a copper-containing mixed metal silicon oxide catalyst with a molecular formula of M.sub.uCu.sub.vSi.sub.yO.sub.z. The reaction is carried out at 80-400 C. and 20-150 atm for 0.1-200 h to prepare the 1,3-PDO. The yield of the 1,3-PDO can reach to 73%. The alcohol byproduct generated in the second step catalytic hydrogenation reaction can be recycled to use for the first step catalytic reaction by the ring opening-carbonylation-esterification.
TRANSITION METAL-BASED HETEROGENEOUS CARBONYLATION REACTION CATALYST AND METHOD FOR PREPARING LACTONE OR SUCCINIC ANHYDRIDE USING CATALYST
The present invention relates to a transition metal-based heterogeneous carbonylation reaction catalyst that has an excellent catalytic activity and selectivity in the carbonylation reaction and is easily separated from a product, by crosslinking polymerizing a transition metal-based homogeneous catalyst unit through a Friedel-Craft reaction; and a method for preparing lactone using the same. The transition metal-based heterogeneous carbonylation reaction catalyst allows to produce lactone or succinic anhydride with an epoxide compound while showing a high selectivity, and can be applied in industrial very usefully due to easy separation from the product and thus reusing thereof.