Provided are a method of preparing a supported metallocene catalyst, and a method of preparing polypropylene using the catalyst prepared thereby. According to the present invention, provided is a supported metallocene catalyst capable of preparing an isotactic polypropylene polymer having a low xylene soluble content while having excellent catalytic activity.

The disclosure provides for zirconium terephthalate-based metal organic frameworks with open metal sites, and uses thereof.

Provided are new nickel./zirconium-mediated coupling reactions useful in the synthesis of ketone-containing compounds, e.g., halichondrin natural products and related molecules. A feature of the present disclosure is the use of a nickel(I) catalyst in tandem with a nickel (II) catalyst in the Ni/Zr-mediated coupling reactions. Without wishing to be bound by any particular theory, the nickel (I) catalyst selectively activates the electrophilic coupling partner (i.e., the compound of Formula (A)), and the nickel(ll) catalyst selectively activates the nucleophilic coupling partner (i.e., a thioester of Formula (B)). This dual catalyst system leads to improved coupling efficiency and eliminates the need for a large excess of one of the coupling partners (i.e., a compound of Formula (A) or (B)).

Provided are industrial processes for producing an organic acid alky ester from a feedstock containing organic acids and/or saponifiables, comprising: countercurrently contacting a feedstock with an organic alkylating reagent over two or more vessels or stages at temperature between 100° C. and 400° C. and pressure between barg and 355 barg while simultaneously removing water and/or glycerin with unreacted alkylating reagent from the final vessel or stage to result in a first reaction method product containing organic acid alkyl esters, followed by a choice of using the alkyl esters as-is, purifying the organic acid alkyl esters from the first reaction product mixture or subjecting the first reaction product mixture to an additional transesterification reaction to convert saponifiables into additional organic acid alkyl esters, then purifying the organic acid alkyl esters from this second reaction method product.

A series of isoreticular metal-organic frameworks composed of metal nodes connected by rigid trigonal prismatic organic linkers and having a 6,12-coordinatled alb network topology are provided. Also provided are methods of synthesizing the metal-organic frameworks and methods of using the metal-organic frameworks to catalyze the hydrolysis of organic molecules, such as nerve agents, having hydrolysable bonds.

Embodiments of the present disclosure are directed towards method of making a metal-ligand complex, the method including: reacting a (L.sup.1)H compound and a base in a primary solvent to make a reaction mixture comprising an intermediate anionic L.sup.1 compound in the primary solvent; and reacting the intermediate anionic L.sup.1 compound and a L.sup.2MX.sub.3 complex to make a L.sup.1L.sup.2MX.sub.2 complex, wherein L.sup.1 and L.sup.2 independently are cyclopentadienyl-type (Cp-type) ligands, M is zirconium or hafnium, and each X is a halide and wherein the intermediate anionic L.sup.1 compound is not isolated from the reaction mixture.

The invention relates to a photocatalytic oil-water separation material and a preparation method thereof, the method including the following steps: cleaning a base material and a metal-doped material, and drying for later use; preparing a mixed solution of an amine monomer and an acid-alkali buffer reagent, soaking the base material in the mixed solution, and reacting under an oscillation condition, to obtain the base material attached with amine monomer polymer; dissolving a soluble metal additive and an organic ligand reagent into an organic solvent, and performing ultrasonic stirring uniformly, to obtain a metal organic framework material (MOF) reaction solution with photocatalytic performance; and placing the metal-doped material, the base material attached with the amine and the MOF reaction solution into a reaction kettle for performing hydrothermal reaction, cleaning and drying the reacted base material, to obtain the photocatalytic oil-water separation material.

A metal organic framework (MOF)-polymer composite for detoxifying a chemical warfare agent (CWA) comprises MOF nanoparticles having catalytically active Lewis acid sites and at least one polymer having catalytically active basic sites. The composite is configured such that the at least one polymer is in surrounding relation to the MOF nanoparticles such that at least a portion of the Lewis acid sites of the MOF nanoparticles are in proximal relation to at least a portion of the basic sites of the at least one polymer thereby forming a plurality of proximal acid-base interfaces thus enabling a bifunctional catalytic mechanism for detoxifying the CWA. The MOF-polymer composite can provide CWA detoxification without the presence of a basic compound.

The present disclosure provides catalyst compounds including a nonsymmetric bridged amine bis(phenolate), catalyst systems including such, and uses thereof. Catalyst compounds, catalyst systems, and processes of the present disclosure can provide high comonomer content and high molecular weight polymers having narrow Mw/Mn values, contributing to good processability for the polymer itself and for the polymer used in a composition.

A process comprising a heterogeneous reaction between a solid metal organic framework supported catalyst and a hydrocarbon feed to form a modified hydrocarbon stream. The modified hydrocarbon stream comprises essentially of C6+ hydrocarbons.