Kazakhstan is negotiating with South Korea's Hanwha Chemical, Japan's Marubeni and the investment arm of the Abu Dhabi government to finance a KZT645bn ($4.4bn) polyethylene plant.
Kazakhstan is also in talks with China Petroleum & Chemical, Sinopec, and LG Chem, which it plans to have as a partner in the project.
Earlier in March, officials awarded a contract to build a KZT300bn ($2bn) polypropylene plant in western Kazakhstan to Sinopec.
The polypropylene plant, which will form part of a gas chemicals complex, will produce 500,000t/year of polypropylene and 800,000t/year of polyethylene once it reaches full capacity in 2015.
