A process can be used for producing a distillate product with a methanol concentration greater than the concentration of methanol in the minimum boiling azeotrope of methanol and methyl (meth)acrylate, from a mixture with a methanol concentration less than the concentration of methanol in the minimum boiling azeotrope of methanol and methyl (meth)acrylate, in a distillation column. A transesterification process for preparing C.sub.6- to C.sub.22-alkyl, aryl or alkenyl (meth)acrylates from methyl (meth)acrylate is also provided.

Compositions and methods for selective olefin (e.g., ethylene) polymerization comprising metal organic frameworks (MOFs) are generally provided. In some embodiments, a MOF comprises a plurality of metal ions, each coordinated with at least one ligand comprising at least two unsaturated N-heterocyclic aromatic groups arranged about an organic core.

Bimetallic catalytic compounds and compositions comprising permethylpentalene ligands, as well as their methods of preparation, are described. The catalytic compounds and compositions are promising catalysts in olefin (e.g. ethylene) polymerisation reactions.

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The present application is directed to a method for the conversion of nitrous acid to dinitrogen gas. In particular, the present application relates to a method for the conversion of nitrous acid to dinitrogen gas by contacting the nitrous acid with an amine-functionalized metal organic framework.

In one aspect, the present invention provides catalysts for the carbonylation of heterocycles. The inventive catalysts feature metal-ligand complexes having cationic functional groups tethered to the ligand, wherein the tethered cationic groups are associated with anionic metal carbonyl species. The invention also provides methods of using the inventive catalysts to affect the ring opening carbonylation of epoxides.

The present invention relates to a water-stable Titanium-based metal-organic framework (MOF) material having a high degree of condensation, i.e. an oxo to Ti ratio (or oxo to metal ratio, in the case of doped Ti-based MOFs) >1.0; a process of preparing same and uses thereof, particularly for heterogeneously catalyzed chemical reactions, for gas storage/separation/purification, for information storage, laser printing or as an oxygen indicator, or as proton conductive material (fuel cells), optoelectronic material (photovoltaic cells including Grtzel cells), as a matrix for encapsulating active principles (medicaments, cosmetics), or else as sensing material.

Disclosed is a catalyst and process for producing ammonia (NH.sub.3). The process includes contacting a gaseous feed mixture comprising nitrogen (N.sub.2) and hydrogen (H.sub.2) with a metal hydride material under reaction conditions sufficient to produce a product stream comprising NH.sub.3.

A process for the preparation of pre-activated or pre-polymerized catalysts made from or containing a solid catalyst component made from or containing Ti, Mg, and halogen is disclosed. The resulting catalyst is protected from the release of flammable gases in contact with water. The process includes the steps of (a) a reaction step for yielding a catalyst precursor; (b) a reaction step in which the catalyst precursor is reacted with an organoaluminum compound for yielding a modified-catalyst precursor; (c) a treatment step in which the modified-catalyst precursor is treated with a mono or polychlorinated compound, thereby yielding the solid catalyst component; and (d) isolating and recovering the solid catalyst component.

The present invention relates to a high-density ethylene-based polymer comprising an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an -olefin, a cyclic olefin, and a straight, branched and cyclic diene. According to the present invention, the high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

The invention describes a method for dimerization of ethylene implementing a step for treatment of raw effluent by neutralization, at the outlet of the reactor, of the catalyst for dimerization of ethylene into but-1-ene by a particular alcohol.