By Leonard Wang, UT China correspondentBeijing-The TDI (toluene diisocyanate) output of Gansu Yinguang Chemical Co., Ltd reached a record level in 2003 at 20 000 tonnes.
The unit was imported in 1986, but only began making products of adequate quality in 1990 and did not achieve regular production until August 2001. At that time, the unit was modified using domestic technology and production was restarted. In 2002 the unit's output was 13 000 tonnes.
There are presently four TDI units in China, but only Gansu Yinguang and Cangzhou Dahua's units are in regular production. Yinguang has also planned a three-phase development strategy.
The first is to boost the output to 40-50 000 tonnes per year (tpy) rising to 80-100 000 tpy by 2010. In a third phase, by 2020, its output will reach 200 000 tpy. Both the new 20 000-tpy expansion unit and an 80 000 t/y DNT (dinitrotoluene) unit are presently under construction."