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- W2950332904 abstract "2, 3-Dimethylbutene-2 (DMB-2) is a key olefin for the synthesis of Danitol®, which is a high perfomance pyrethroid insecticide invented by Sumitomo in 1976. At that time, DMB-2 was too expensive for the development of Danitol®. Therefore, we studied the simplest way to DMB-2, that is, the dimerization of propylene to DMB-1 followed by isomerization to DMB-2, and succeeded in developing the efficient dimerization catalyst. This catalyst consists of six components ; nickel naphthenate (Ni (naph)2) /PR3/diene/AlEt3/chlorinated phenol/ H2O. The characteristics of this catalyst are as follows. (1) The content of DMBS in dimers (DMBS selectivity) is high as 86%. (2) DMB-1 and DMB-2 can be produced at will only by controlling the molar ratio of catalyst components. (3) A small amount of water enhances the catalytic activity remarkably. Using this catalyst, we started the commercial production of DMB-2 in 1983." @default.
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- W2950332904 date "1990-01-01" @default.
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- W2950332904 title "Dimerization of propylene to 2,3-dimethylbutenes(DMB); Process development and industrialization." @default.
- W2950332904 doi "https://doi.org/10.5059/yukigoseikyokaishi.48.806" @default.
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