A method for producing a carbodiimide compound, comprising a carbodiimide production step of reacting an aliphatic tertiary isocyanate compound (A) in the presence of an inorganic alkali metal compound (B) and at least one of a phase transfer catalyst (C), a compound (D-1) represented by general formula (2-1), and a compound (D-2) represented by general formula (2-2).

The present invention relates to a method for preparing a carboxylic acid ester compound. Under the catalysis of nitrite, a carboxylic acid reacts with an alcohol in air so as to obtain an ester compound; and the alcohol is ethanol, propanol or trifluoroethanol. The present invention has the advantages such as mild reaction conditions, rich source of raw materials, wide universality of reaction substrates, and simple operation, and can modify a series of carboxylic acids having medicinal properties and aliphatic carboxylic acids such as biologically active amino acids.

The present disclosure provides a macroporous noble metal catalyst and processes employing such catalysts for the regeneration of deactivated ionic liquid catalyst containing conjunct polymer.

A process for the preparation of 5-(3,4-dimethoxyphenylethyl) methyl-amino-2-(3,4-dimethoxyphenyl)-2-isopropyl valeronitrile, which is known as Verapamil is described. A process for improving the purity of verapamil and therefore of its hydrochloride represented as the compound of formula I, by efficient removal of the impurities formed, affording a product of purity greater than 99% is described.

The present invention discloses a composite catalyst for the photocatalytic isomerization of norbornadiene to prepare quadricyclane, comprising: a solid photocatalyst, selected from the group consisting of TiO.sub.2, Ti-MCM-41, Ti-SBA-15, ZnO, WO.sub.3, Ta.sub.2O.sub.5 or SrTiO.sub.3; and an organic photo-sensitizer loaded on the surface or in the channel of said solid photocatalyst, selected from benzophenone, acetophenone, Michler's Ketone, tetraethyl Michler's Ketone, and diethyl Michler's Ketone, where the organic photo-sensitizer is present in the solid photocatalyst in an amount of 0.5% to 20% by weight. The catalyst of the invention can catalyze a target reaction under the condition that no solvent is used, and the yield of the target product quadricyclane is higher. Furthermore, the catalyst of the invention has a stable activity, and it can be recycled. The invention further discloses a process for preparing the composite catalyst.

A synthesis method of 3,4-hexanedione comprises a step of 4-hydroxy-3-hexanonen oxidation, and in the step of 4-hydroxy-3-hexanonen oxidation, water is used as a catalyst, acetic acid is used as a cocatalyst, and ozone is used as an oxidizing agent to carry out an oxidation reaction on 4-hydroxy-3-hexanonen, and after the reaction, distillation under reduced pressure is carried out to obtain the 3,4-hexanedione. According to the synthesis method of 3,4-hexanedione in the invention, in the process of 4-hydroxy-3-hexanone oxidation, the 4-hydroxy-3-hexanone is placed in the water, the ozone is used for oxidation on the 4-hydroxy-3-hexanone, and the acetic acid is used as the cocatalyst, so that the entire oxidation reaction process is mild in conditions and simple to operate, no sewage is produced when the final product (3,4-hexanedione) is obtained, and the yield is greatly increased.

A process utilizing an ionic liquid is described. The process includes contacting a hydrocarbon feed with an ionic liquid component, the ionic liquid component comprising a mixture of a first ionic liquid and a viscosity modifier, wherein a viscosity of the ionic liquid component is at least about 10% less than a viscosity of the first ionic liquid.

The present invention relates to a process for preparing, 4-bis(ethoxymethyl)cyclohexane, which comprises reacting 1,4-bis(hydroxymethyl)cyclohexane with ethyl chloride in the presence of an inorganic base, a solvent and a phase transfer catalyst to yield a reaction mixture containing 1,4-bis(ethoxymethyl)cyclohexane, where the inorganic base is selected from alkali metal hydroxides and earth alkaline metal hydroxides and where the solvent is selected from water or a mixture of water with at least one organic solvent.

A catalyst composition, including a titanate of the formula Ti(OR).sub.4 wherein each R is the same or different, and is a hydrocarbon residue; a catalyst additive, wherein the catalyst additive is a dibutyl ether a silicate, a silazane, an aromatic ether, a fluorocarbon, or a combination comprising at least one of the foregoing; and an organic aluminum compound.

An isoalkane alkylate base oil and a process to make an isoalkane alkylate base oil having a VI higher than 90, comprising: a. selecting an isoalkane feed containing at least one isoalkane and an olefin feed containing at least one linear olefin such that a combined carbon number of the isoalkane feed and the olefin feed is from 20 to 60; and b. alkylating the isoalkane feed with the olefin feed in the presence of an acidic alkylation catalyst under alkylation conditions to make the isoalkane alkylate base oil having the VI higher than 90; wherein the isoalkane alkylate base oil has a kinematic viscosity at 100 C. from 2 to 30 mm.sup.2/s, a pour point less than 0 C., and a bromine index less than 2000 mg Br/100 g.