In one aspect, methods for the facile synthesis of cationic cobalt complexes for asymmetric hydrogenation of alkenes are provided. Synthetic methods described herein, in some embodiments, provide Co(I) precatalysts on a time scale and yield permitting catalytic evaluation of a significant number of enantiopure ligands.

The present disclosure provides N-heterocyclic carbene ligands, catalyst complexes thereof, and methods using same. The present disclosure further provides synthetic methods of preparing the N-heterocyclic carbene ligands and catalyst complexes disclosed herein.

Process for preparing an acetal from an olefin using an iodine-alkyl compound.

The present invention relates to a process for the preparation of an optically pure (+) or (?) enantiomer of an iminium salt having the formula (I), aid process comprising the following steps: a) a reduction step of an iminium salt having the formula (II), said salt being in the form of a racemic mixture, in order to obtain a compound having the formula (III) in the form of a racemic mixture, b) a step of chiral HPLC separation of the compound of formula (III) in the form of a racemic mixture, for obtaining an optically pure (+) or (?) enantiomer compound having the formula (IV), and c) an oxidation step of the compound of formula (IV) for obtaining the compound of formula (I).

The present invention relates to a process for hydrosilylating an unsaturated compound with a compound comprising at least one hydrogenosilyl function catalysed by organic cobalt compounds in the presence of a compound (E) having the formula (3): ROH (3), wherein R represents the hydrogen atom or R is chosen from the group consisting of alkyl groups having 1 to 8 carbon atoms, cycloalkyl groups having 6 to 12 carbon atoms, aryl groups having 6 to 12 carbon atoms, aryl-alkyl groups, and silyl groups.

A novel catalyst, a use thereof and a method for treating PCB inked waste by using the same are disclosed. The catalyst of the present disclosure is represented by the following formula (I):

[M(O).sub.a].sup.m+X.sup.n(I)

herein M, X, a, m and n are defined in the specification.

A catalyst composition comprises an inert hydrocarbon solvent, having dissolved therein a titanate of the formula Ti(OR).sub.4 wherein each R is the same or different, and is a hydrocarbon residue, and an organic aluminum compound, wherein a molar ratio of the organic aluminum compound and any alkene present in the catalyst composition is greater than one.

Process for increasingly producing D-Lactide and meso lactide by depolymerizing by back biting polylactide (PLA) said process which comprises: (i) Depolymerizing polylactide into its corresponding dimeric cyclic esters by heating the polylactide in the presence of a catalyst system comprising a catalyst and a co-catalyst in a reaction zone at temperature and pressure at which the polylactide is molten; (ii) Forming a vapor product stream from the reaction zone; (iii) Removing the vapor product stream and optionally condense it; (iv) Recovering, either together or separately meso-lactide, D-lactide and L-lactide.

This invention pertains to hydroformylation catalysts containing a mixture of isomeric forms of halo-phosphorus ligands. This invention also describes a procedure for preparing isomers of certain halophosphite ligands, which contain the phosphorus atom in a macrocyclic ring.

A hydrodemetallization (HDM) catalyst includes an alumina and carbon extrudate support having a weight ratio of about 1:1 alumina to carbon and bimodal type pore size distribution, i.e., both meso-porosity and macro-porosity. The support can be impregnated with at least one hydrogenation active metal and, optionally, at least one promoter metal from the transition metals of Groups 6, 8, 9, and 10 of the Periodic Table. The hydrogenation active metal can be, for example, Mo, W, and Fe. The promoter metal can be, for example, Co, Ni, and Fe. The catalyst may further include ethylene diamine tetra acetic acid (EDTA).