Technology:
Unlike
polyethylene, polypropylene can be mass produced only from crude oil at the
present stage. For fear of possible short supply of crude oil, many research
teams are developing technologies for stable supply of polypropylene. Masakazu Iwamoto of Tokyo Institute of Technology developed a technology to produce propylene
that is a material of polyethylene resin from bioethanol using a special
catalyst. He confirmed that about 60% of ethanol changed propylene. According
to the estimates of the Ministry of Economy, Trade and Industry, it is possible
to reduce 3 million tons of CO2 should one million ton of polypropylene be
produced entirely by the new technology. It is planned that Idemitsu Kosan builds
mass production equipment and Sumitomo Chemical produces polypropylene for
Toyota.
Mitsui Chemical and
Hiroshi Shimizu of Osaka University successfully made isopropanol from
genetically-modified Bacillus coli. Isopropanol is a kind of alcohol and used
as a raw material of polypropylene. The genetically-modified Bacillus coli changes
to Isopropanol in two days if it is put into a sugar solution extracted from plant
fibers. It is possible to produce propylene by extracting the moisture of isopropanol.
For the purpose of calculation, about 250 g of propylene can be made from 1 kg
of sugar. His technology has more than 10 times higher productivity than the
existing technology, and it can be put into practical use should the response
speed grow two times faster.
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