Enzymes grow in Japan

Article Abstract:

Japanese research companies are utilizing enzymes for environmental remediation, chiral processes and membranes. Mitsubishi Gas Chemical Co. intends to market its "ASC Super" catalese enzymes internationally after Japanese demand for the enzyme has grown five times in the last four to five years. Mercian Corp., which is involved in chiral processing, has developed a process that generates beta-cyclodextrin and a small volume of gamma-cyclodextrin, while researcher Katsuhiko Nakamae of Kobe University has successfully immobilized urease in an ethylene-vinyl acetate copolymer membrane.

Comment:

Japan: Research companies are utilizing enzymes for environmental remediation, chiral processes and membranes

Enzymes, Other Basic Organic Chemical Manufacturing

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Tough sulfur compound not a problem for this catalyst

Article Abstract:

Kyushu University researchers said a new hybrid catalyst it is developing will help resolve limits imposed on sulfur content in light oil. At present, Japanese laws require a limit of 500 ppm with limits scheduled to become lower at 100 ppm by 2000 and below 50 ppm by 2005. Chemistry professor Shigeharu Morooka said the new catalyst is a combination of nickel on a Y-zeolite carrier and the conventional cobalt-molybdenum on alumna carrier. A study has shown that the catalyst can expand the desulfurization reaction rate of compounds by a factor fo two to six.

Comment:

Kyushu University researchers said a new hybrid catalyst will help resolve limits imposed on sulfur content in light oil

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical Catalysts, Catalysts

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A new route to polycarbonate uses less-hazardous materials

Article Abstract:

The National Institute of Materials and Chemical Research (MCR) in Tsukuba, Japan, is designing an alternative route to polycarbonate resin through an oxidative carbonylation of bisphenol A utilizing carbon monoxide and oxygen. In comparison, the main commercial route reacts phosgene with bisphenol A. Key to the MCR route is a new system of organic and inorganic (palladium chloride and cerium) redox catalysts. Dyhydrating agents, which include molecular sieves, avoid catalyst degradation by traces of water.

Comment:

Japan: An institute is designing an alternative route to polycarbonate resin through an oxidative carbonylation of bisphenol A

Plastics Material and Resin Manufacturing, Polycarbonate Resins, Polycarbonates

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