A titanium catalyst and a synthesizing method of polyester resins are provided in the present disclosure. The titanium catalyst has a chemical structure represented by Formula (I), Formula (II) or Formula (III). ##STR00001##
The symbols shown in the Formula (I), the Formula (II) or the Formula (III) are defined in the description. The synthesizing method of polyester resins includes providing the titanium catalyst, performing a feeding step, performing a heating and pressurizing step and performing a heating and vacuuming step. The titanium catalyst and a heat stabilizer are added into an autoclave before the feeding step or before the heating and vacuuming step.

The instant disclosure provides an organometallic compound of Formula I: ##STR00001##
wherein R is selected from C.sub.1-10 alkyl or C(O)C.sub.1-10 alkyl; R.sub.1 is selected from C.sub.1-10 alkyl, C(O)C.sub.1-10 alkyl, C(O)C.sub.1-10 alkylN.sup.+R.sub.aR.sub.bCl.sup.?, C(O)C.sub.1-10 alkylN(CO)R.sub.a, C.sub.1-10 alkylN.sup.+R.sub.aR.sub.bCl, or C.sub.1-10 alkylN(CO)R.sub.a, wherein R.sub.a, and R.sub.b is independently selected from H, C.sub.6-12 aryl, C.sub.1-10 alkyl, C.sub.6-12 aryl, or C.sub.1-10 alkyl; R, and R.sub.1 can be taken together to form a monocyclic 6-8 membered ring; M is selected from Group VI-B metals; and m and n is independently 1 to 3. A process for obtaining the organometallic compound is also provided.

A modified solid polyalkylaluminoxane is provided, which is capable of providing -olefin suppressing adhesion of any polymer produced as a by-product onto the reactor wall and the stirrer, and which is capable of providing a highly active olefin oligomerization reaction catalyst. An olefin oligomerization reaction catalyst containing the modified solid polyalkylaluminoxane is also provided. The modified solid polyalkylaluminoxane for olefin oligomerization reactions contains structural units represented by general formula (a) and structural units represented by general formula (b), whose median diameter is equal to or larger than 0.1 m and equal to or smaller than 50 m, ##STR00001##
in which R in the general formula (a) represents an alkyl group having 1 to 20 carbon atoms, and R in the general formula (b) represents a halogenated alkoxy group having 1 to 20 carbon atoms or a halogenated aryloxy group having 6 to 20 carbon atoms.

Disclosed herein are reaction compositions comprising an oxidation catalyst, a solvent, and a substrate that is dissolved in the solvent. The oxidation catalyst comprises a metal ion complexed with an -keto acid and a tridentate N,N,O-ligand. Also disclosed herein are methods for oxidizing a CH bond of a molecule, the methods comprising contacting the molecule with a metal complex comprising a metal ion complexed with a tridentate N,N,O-ligand in the presence of an -keto acid and a solvent. In some embodiments, the oxidation catalyst or metal complex is linked to a solid support.

A process for preparing a catalyst material, includes the steps of: (a) providing a support material having surface hydroxyl (OH) groups, wherein the support material is ceria (CeO.sub.2), zirconia (ZrO.sub.2) or a combination of thereof; (b) reacting the support material having surface hydroxyl (OH) groups of step (a) with a precursor containing two transition metal atoms, each chosen independently from the group consisting of: W, Mo, Cr, Ta, Nb, V, Mn; (c) calcining the product obtained in step (b) in order to provide a catalyst material showing dual site surface species containing pairs of transition metal atoms derived from the precursor that are present in oxide form on the support material. Additionally, a catalyst material is obtained by the process set out above, and the catalyst material is used as an ammonia selective catalytic reduction (NH.sub.3-SCR) catalyst for nitrogen oxides (NOx) reduction.

A method for producing a (meth)acrylate comprises transesterification reaction of an alcohol and a monofunctional(meth) acrylate with catalysts in combination being cyclic tertiary amines having an azabicyclo structure and compounds containing zinc, separating a solid that contains the catalysts from a reaction product containing a (meth)acrylate, and producing a (meth)acrylate by transesterification reaction of an alcohol and a monofunctional (meth)acrylate, while using the recovered solid catalyst.

The present invention relates to a process for the preparation of 2,6-di-tert-butyl phenol by reacting phenol with isobutylene in presence of an aluminum phenoxide catalyst, comprising i) preparing an aluminum phenoxide catalyst and phenol comprising mixture a) by mix-ing aluminum metal with phenol, and activating the catalyst by heating the mixture to a temperature of 100 to 180? C., and ii) carrying out a reaction b) by reacting mixture a) with an isobutylene comprising stream comprising 20 to 90% by weight of isobutylene and 10 to 80% by weight of 1-butene and/or 2-butene, which reaction is carried out under pressure and the maximum pressure is 5 to 20 bar.

The invention relates to a process for preparing polyalpha-olefins using a catalyst composition comprising a reaction product of an organometallic complex and a co-catalyst, wherein the comprising an organometallic complex is represented by the general formula: LMXn wherein: (i) L is an organic ligand; (ii) M is a transition metal having a valency of p, wherein the metal M is selected from Ti, Zr, and Hf; (iii) X is an anionic ligand to the metal M, and wherein X is selected from the group consisting of halogens, alkyls, aralkyls, alkoxides, amides, and combinations thereof; (iv) n is the number of X groups and equals p-2.

A tri-metallic organic framework having the formula BixCoyNi(1xy)(BTC)(4,4-bipy), its synthesis, and its use as a reduction catalyst.

The method relates to the field of asymmetric allylic amination and comprises preparing a chiral N-substituted allylic amine compound from the corresponding allylic substrates and substituted hydroxylamines, in the presence of a catalyst, said catalyst comprising copper compounds and a chiral ligand. Examples of chiral amine compounds which can be made using the method include Vigabatrin, Ezetimibe Terbinafine, Naftifine 3-methylmorphine, Sertraline, Cinacalcet, Mefloquine hydrochloride, and Rivastigmine. There are over 20,000 known bioactive molecules with chiral N-substituted allylic amine substructure. The method may also be used to produce non-natural chiral -aminoacid esters, a sub-class of chiral N-substituted allylic amine compounds. Examples of -aminoacid ester which can be produced by the disclosed method, include, but are not limited to, N-(2-methylpent-1-en-3-yl)benzenamine and Ethyl 2-methylene-3-(phenylamino)butanoate. Further, the products of the method described herein can be used to produce chiral heterocycles and bioactive molecules or materials. A novel chiral copper-BINAM nitrosoarene complex is also set forth.