A hydroprocessing catalyst or catalyst precursor has been developed. The catalyst is a unique transition metal tungsten oxy-hydroxide material. The hydroprocessing using the transition metal tungsten oxy-hydroxide material or the decomposition product thereof may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

Organic isocyanates are converted to ureas by heating in the presence of certain cobalt, magnesium, chromium and lanthanide series organometallic catalysts. The process requires no water or other reactants. The process is particularly useful for removing small quantities of monoisocyanates from a solvent stream recovered from a polyisocyanate manufacturing process. The urea compounds in some instances can be recycled back into the polyisocyanate manufacturing process and reacted with polyisocyanate compounds to form biurets.

Novel processes of preparing block polyester copolymers while precisely controlling the stereoconfiguration (e.g., tacticity), chemical composition and/or length of each unit (block) are provided. Block polyester copolymers featuring desirable combinations of two or more blocks featuring different stereoconfiguration (e.g., tacticity), chemical composition and/or length, including triblock, tetrablock and higher block copolymers are also provided. A novel family of organometallic magnesium complexes and uses thereof in preparing polyesters and block polyester copolymers are also provided.

The disclosure provides for metal organic frameworks (MOFs) which comprise a plurality of redox-active metals or metal ions that are linked together by a plurality of dioxide-benzenedicarboxylate-based organic linking ligands. The disclosure further provides for the use of these MOFs in variety of applications, including catalyzing the oxidization of various hydrocarbons to higher oxidation states.

A hydroprocessing catalyst has been developed. The catalyst is a unique transition metal tungsten oxy-hydroxide material. The hydroprocessing using the transition metal tungsten oxy-hydroxide material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

The present invention relates to the field of polymerisation catalysts, and systems comprising these catalysts for polymerising carbon dioxide and an epoxide, a lactide and/or lactone, and/or an epoxide and an anhydride. The catalyst is of formula (I): ##STR00001##
wherein at least one of M.sub.1 or M.sub.2 is selected from Ni(II) and Ni(III)-X. A process for the reaction of carbon dioxide with an epoxide; an epoxide and an anhydride; and/or a lactide and/or a lactone in the presence of the catalyst is also described.

The present invention provides a novel catalyst of formula (I): wherein M is selected from Zn(H), Co(II), Mn(II), Mg(II), Fe(II), Cr(III)-X or Fe(III)-X, and the use thereof in polymerizing carbon dioxide and an epoxide.

A method for preparing a novel hydrogel including silico-metallic mineral particles of the formula (Si.sub.x(Si-A).sub.1x).sub.4M.sub.3O.sub.11.nH.sub.2O, in which: x is a real number in the range [0.75; 1], A denotes a group selected from methyl and hydrocarbon groups including at least one heteroatom, and M is a metal selected from the group consisting of magnesium, cobalt, zinc, copper, manganese, iron, nickel and chromium, wherein a coprecipitation reaction is carried out in an aqueous medium between: at least one metal salt of the metal M, sodium metasilicate, Na.sub.2OSiO.sub.2, and at least one water-soluble oxysilane of formula (I): ##STR00001## in which R1, R2 and R3 are selected from hydrogen and linear alkyl groups including 1 to 3 carbon atoms.

A new class of organic-inorganic hybrid composite materials, composites of a fluoroalkyl fluorophthalocyanine and a solid-state support containing an imidazole group. The new class of composite materials can be used as a heterogeneous catalyst for the heterogeneous oxidation organic molecules in aqueous and some organic solvents systems is claimed.

The present invention relates to a process for preparing a porous metal-organic framework by reacting at least one metal compound in which the metal is Be, Mg, Ca, Sr, Ba, Al, Ga or In with at least one at least bidentate organic compound and also the use of such porous metal-organic frameworks.