Kurata process

The Kurata process [76] is a two-step process which uses thermoplastic resins as raw material and adds catalysts that consist of five metallic elements such as Ni, Cu, A1 and so on. The temperatures of the two phases are 200-250°C and 360-450°C, respectively. During the cracking reaction, the polymer molecules are rearranged. Equipment for HCl neutralizing is positioned at the end of the process, so there is no clear limitation on the content of PVC in feedstocks. HCl can be easily removed at a rate of 99.91%, even when the content of PVC is as high as 20%, and the concentration of chlorine in the products is lower than 100 ppm. An important difference between this process and the others is that its products are mainly composed of kerosene. 

The discussion developed above is concerned with differential absorptions, and information derived from it cannot be readily extended to absorptions of the integral type. Recent experiments [Odani, Kida, Kurata and Tamura (1961) Odani, Hayashi and Tamura (1961)] indicate that the absorption processes starting with a fixed initial concentration generally depend markedly upon the pressure increment of... 

Tomiyama Y, Kashiwagi H, Kosugi S, Shiraga M, Kanayama Y, Kurata Y, Matsuzawa Y Atmormal processing of the glycoprotein lib transcript due to a nonsense mutation in exon 17 assodated with Glanzmann s thrombasthenia Thromb Haemost 73 756-762,1995. 

Hagiwara A, Shibata M, Kurata Y, et al. 1983. Long-term toxicity and carcinogenicity test of ammonia-process caramel colouring given to B6C3F1 mice in the drinking-water. Food Cosmet Toxicol 21 701-706. 

Kurata, T. Miyake N. Suzuki, E. Otsuka, Y. Autoxidation of L-ascorbic acid, and its significance in food processing. In Chemical Markers for the Quality of Processed and Stored Foods, Lee, T.C. Kim, H.J. (Eds.) American Chemical Society Washington, DC, 1996a pp. 137—145. 

Table I compares glucose with ascorbic acid for a number of oxidative parameters. The higher rate of oxidation, oxidant production, and concomitant protein fragmentation and generation of fluorescence products on albumin by ascorbic acid is also accompanied by aldehyde products able to bind to proteins (Kurata et al, 1973 Kurata and Fujimaki, 1976). The attachment of carbohydrate to albumin (Hunt and Wolff, 1991b) may explain ascorbic acid s ability to inhibit the oxidation of LDL by copper in vitro (Retsky et al., 1993 Jialal et al, 1990). A number of studies have shown that ascorbic acid can decrease the oxidation of LDL by copper, the process usually occurring over several hours. Such observations are not indicative of an antioxidant activity.

Kurata, K. Problems in the Radiopharmaceutical Processing of Cyclotron-Produced Nuclides. Proc. Jap. Conf. Radlolsotop., No. 10, 486 (1972). 

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