Dairen Chemical Corporation

Dairen Chemical Coorporation

Fu-Shen Lin

Shien-Chang Chen

Liang-An Hsu

Chih-Jung Chen

June-Yen Chou

Hsing-Yun Wang

Wei-Lun Hsieh

Cheng-Lin Tsai

Wan-Jy Cheng

Fu-Juh Huang

Pi-Fwu Jang

Joe-Min Lin

Yuh-Lih Jong

A polycarbonate diol is provided, including three kinds of repeating diol units, wherein one of the repeating diol units is chosen from an alkoxylated diol monomer.

Polycarbonate diol and thermoplastic polyurethane made from the same

This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.

Catalytic oxacylation vapor phase process

Method for preparing lactam

The present invention relates to a catalyst for preparing a lactone, which is prepared by supporting a cupric compound, a zinc compound and at least one alkaline earth metal compound on the supporter. The present invention also relates to a method for preparing a lactone, which comprises a dehydrocyclization reaction of a diol under a gas phase in the presence of the aforementioned catalyst after activating said catalyst. The catalyst for preparing lactone of the present invention is quite economic because of its high activity, long lifetime and high selectivity of products.

Catalyst for preparing lactone and a method for preparing lactone

This invention relates to a preparation process of a catalyst which comprises a noble metal and a metal as catalysis promoter in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a carrier. The preparation process comprises impregnating the carrier with a solution containing an oxidative state noble metal as the main catalyst and an oxidative state metal as catalysis promoter, reducing the oxidative state metals into the metallic state in gaseous phase with a gaseous reducing agent under certain temperature, pressure, moisture and gas concentration, then impregnating the reduced carrier with a solution of an alkali or alkaline earth metal compound. The metal components-supporting catalyst prepared by the process according to the present invention has a high surface area and exhibits high catalytic activity, which leads to increase the catalytic efficiency and life of this heterogeneous catalyst. The catalyst prepared in the present invention is suitable for producing alkenyl acetates through reaction of olefins, acetic acid and oxygen in vapor phase.

Process of preparing catalyst for producing alkenyl acetates

A process for the preparation of methyl formate by the vapor phase dehydrogenation of methanol in the presence of a catalyst composed of copper oxide, a chromium oxide and a sodium compound is described.

Process for producing methyl formate

A process is disclosed for the preparation of high purity carbon monoxide by heating methyl formate in the presence of a catalyst of a precious metal compound with or without a promoter of alkali or alkaline earth metal compound.

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Taipei, Taiwan

Fu-Shen Lin