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.

A system and method for producing 1-butene and ultra-high-molecular-weight polyethylene (UHMWPE), including feeding a catalyst, an antifouling co-catalyst, and ethylene to a reactor, and dimerizing ethylene into 1-butene and polymerizing a relatively small portion of the ethylene into UHMWPE. A product slurry including 1-butene and UHMWPE is discharged from reactor and UHMWPE is removed from the product slurry as a coproduct of the product 1-butene. The coproduct UHMWPE may be a byproduct that is a relatively small amount of the product slurry. The quantity of UHMWPE produced may be small in comparison to the quantity of 1-butene produced.

Provided is a one-step method for producing an enol ether using a diketone of a macrocyclic compound as a starting material. A method for producing a compound represented by general formula (I) includes reacting a compound represented by general formula (II) in the presence of a metal catalyst containing at least one metal element selected from the group consisting of magnesium, aluminum, zirconium, titanium, and samarium, and an alcohol containing at least one selected from the group consisting of a primary alcohol and a secondary alcohol to obtain the compound represented by general formula (I). ##STR00001##

The present disclosure provides novel methods of making aluminum complexes with utility for promoting epoxide carbonylation reactions. Methods include reacting neutral metal carbonyl compounds with alkylaluminum complexes. For example, a compound of formula I: ##STR00001##
is reacted with a neutral metal carbonyl compound (such as Q′.sub.dM.sub.e(CO).sub.w′) to produce an aluminum-based carbonylation catalyst: ##STR00002##

Disclosed are a novel catalyst system which is a catalyst system for selectively oligomerizing olefin including ethylene and may trimerize and tetramerize olefin, different from the catalyst system for olefin oligomerization reported until now, and a method for preparing an olefin oligomer using same. The present invention provides a catalyst system for olefin oligomerization, including a ligand compound represented by Formula 1; a chromium compound; and a metal alkyl compound, and a method for preparing an olefin oligomer using same.

The invention is directed to a process to continuously prepare a cyclic carbonate product by reacting an epoxide compound with carbon dioxide in the presence of a supported dimeric aluminium salen complex. The process is performed in a reactor comprising a slurry of the supported dimeric aluminium salen complex and liquid cyclic carbonate product. The produced cyclic carbonate is discharged from the reactor while the supported dimeric aluminium salen complex remains in the reactor. The liquid carbonate product is purified by means of distillation. Between the reactor and the distillation one or more buffer vessels are present having a volume of between 5 and 50 m.sup.3 per kmol of dimeric aluminium salen complex as present in the reactor.

Provided are methods of producing carbonyl compounds (e.g., carbonyl containing compounds) and catalysts for producing carbonyl compounds. Also provided are methods of making polymers from carbonyl compounds and polymers formed from carbonyl compounds. A method may produce carbonyl compounds, such as, for example ,-disubstituted carbonyl compounds (e.g., ,-disubstituted -lactones). The polymers may be produced from ,-disubstituted -lactones, which may be produced by a method described herein.

The invention relates to a process for the preparation of homogeneous hybrid inorganic-organic materials comprising dissolving and/or suspending and/or dispersing an inorganic and an organic material in a ionic liquid solvent to form an ionic solution and precipitating the inorganic and organic materials together to form a hybrid inorganic-organic precipitate material. The invention further relates to the homogeneous hybrid inorganic-organic precipitate material obtainable or obtained by the process, in particular carbon alumina hybrid material, to shaped articles like fibers and particles comprising said hybrid material and the use thereof for the manufacture ofor as a component incatalysts, sorbents, building and construction materials, packaging materials, paper materials, coatings and polymers.

A system and method for producing 1-butene and ultra-high-molecular-weight polyethylene (UHMWPE), including feeding a catalyst, an antifouling co-catalyst, and ethylene to a reactor, and dimerizing ethylene into 1-butene and polymerizing a relatively small portion of the ethylene into UHMWPE. A product slurry including 1-butene and UHMWPE is discharged from reactor and UHMWPE is removed from the product slurry as a coproduct of the product 1-butene. The coproduct UHMWPE may be a byproduct that is a relatively small amount of the product slurry. The quantity of UHMWPE produced may be small in comparison to the quantity of 1-butene produced.

Provided are methods of producing carbonyl compounds (e.g., carbonyl containing compounds) and catalysts for producing carbonyl compounds. Also provided are methods of making polymers from carbonyl compounds and polymers formed from carbonyl compounds. A method may produce carbonyl compounds, such as, for example ,-disubstituted carbonyl compounds (e.g., ,-disubstituted -lactones). The polymers may be produced from ,-disubstituted -lactones, which may be produced by a method described herein.