The product of the 70 kt/a PP plant was increased and the energy consumption was reduced in Jiujiang subcompany since 1998. The product of PP was 1.03×105 ton on 2002

and the energy consumption was 5.053 GJ/t. The energy consumption of the PP plant was reduced from 6.453 GJ/t to 5.053 GJ/t by improving the product

optimizing production and technical innovations

in accordance with the consist analysis of the energy consumption. At last

the new conception such as the synthesis improve of condensation water and refrigerated water

electricity-saving by producing more high melt flow index （MI） PP was introduced.