A formic acid decomposition catalyst system includes organometallic complexes having formula 1: ##STR00001## wherein: M is a transition metal; E is P, N, or C (as in imidazolium carbene); R.sub.1, R.sub.2 are independently C.sub.1-6 alkyl groups; o is 1, 2, 3, or 4; R.sub.3 are independently hydrogen, C.sub.1-6 alkyl groups, OR.sub.14, NO.sub.2, halogen; R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13, R.sub.15, R.sub.16 are independently hydrogen or C.sub.1-6 alkyl groups; R.sub.14 is a C.sub.1-6 alkyl group; and X.sup. is a negatively charge counter ion.

This invention relates generally to olefin metathesis catalyst compounds, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, articles of manufacture comprising such compounds, and the use of such compounds in the metathesis of olefins and olefin compounds. The invention has utility in the fields of catalysts, organic synthesis, polymer chemistry, and industrial and fine chemicals industry.

Disclosed herein are a chromium compound represented by Formula 1a or 1c and a catalyst system including the same, exhibiting superior catalytic activity in an olefin trimerization reaction:

[{CH.sub.3(CH.sub.2).sub.3CH(CH.sub.2CH.sub.3)CO.sub.2}.sub.2Cr(OH)][Formula 1a]

[{CH.sub.3(CH.sub.2).sub.3CH(CH.sub.2CH.sub.3)CO.sub.2}.sub.2Cr(OH)].sub.4.2H.sub.2O.[Formula 1c]

The present invention concerns a composite comprising supported nanoclusters, the nanoclusters comprising one or more metal ion-containing compounds, wherein each metal ion-containing compound is a transition metal complex having ligands coordinated to a transition metal ion, the ligands being selected from the group consisting of glyoxime; a glyoxime derivative; salicylaldimine; and a salicylaldimine derivative; and wherein the nanoclusters are spaced across one or more surfaces of a support; a material prepared from the composite by annealing; and solution-based methods for forming the composite and materials. Uses of the metal ion-containing compounds are also described, as are uses of the products as catalysts and adsorbers.

The present invention provides a method for preparing 1,5-pentanediol via hydrogenolysis of tetrahydrofurfuryl alcohol. The catalyst used in the method is prepared by supporting a noble metal and a promoter on an organic polymer supporter or an inorganic hybrid material supporter, wherein the supporter is functionalized by a nitrogen-containing ligand. When the catalyst is used in the hydrogenolysis of tetrahydrofurfuryl alcohol to prepare 1,5-pentanediol, a good reaction activity and a high selectivity can be achieved. The promoter and the nitrogen-containing ligand in the supporter are bound to the catalyst through coordination, thereby the loss of the promoter is significantly decreased, and the catalyst has a particularly high stability. The lifetime investigation of the catalyst, which has been reused many times or used continuously for a long term, suggests that the catalyst has no obvious change in performance, thus reducing the overall process production cost.

A nanofibrous catalyst for in the electrolyzer and methods of making the catalyst. The catalysts are composed of highly porous transition metal carbonitrides, metal oxides or perovskites derived from the metal-organic frameworks and integrated into a 3D porous nano-network electrode architecture. The catalysts are low-cost, highly active toward OER, with excellent conductivity yet resistant to the oxidation under high potential operable under both acidic and alkaline environments.

The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C.sub.10.sup.+.

Low molecular weight, high Tg resins, with applications including tire additives and adhesives. An oligomer is obtained by ring opening metathesis polymerization (ROMP) of a sterically encumbered cyclic monomer with an olefinic chain transfer agent. The sterically encumbered cyclic monomer and the olefinic chain transfer agent are present in the polymerization at a molar ratio of from 2:1 to about 40:1. Also, methods for making the oligomer by ROMP.

The invention relates to the field of olefin oligomerization to obtain liner -olefins, particularly to a method of separating olefin oligomerization products using an evaporator. The invention includes two embodiments of the method of separating the oligomerization reaction product streams. In accordance with the first embodiment of the invention, the oligomerization reaction product stream after the step of isolating an initial olefin is fed into an evaporator to the step of separating the oligomerization reaction product steam. In accordance with the second embodiment of the invention, the oligomerization reaction product stream after the step of isolating the initial olefin is separated into two streams, the first part of which is fed into the separation column, and the second part is fed into the evaporator. The invention allows to minimize a quantity of technological equipment contaminated by the by-product polymer.

The present invention relates to a catalyst composition containing: one or more selected from the group consisting of a transition metal compound represented by Formula 1 and a transition metal compound represented by Formula 3, and dialkyl L-tartrate; a cleaning liquid composition containing the catalyst composition; and a method of cleaning a polymerization apparatus using the cleaning liquid composition, ##STR00001## wherein all the variables are described herein.