At present, the company has a set of 1 4- butanediol plant with an annual output of 25,000 tons, a set of supporting acetylene plant with an annual output of 654.38+0,000 tons and a set of formaldehyde plant with an annual output of 60,000 tons imported from Topso Company in Denmark. The investment of this project is 560 million yuan. The project of γ -butyrolactone and its series products is a technical project imported from Frontech Company of the United States, with an investment of more than 400 million yuan. Products include γ -butyrolactone, N- methylpyrrolidone, polyvinylpyrrolidone, cross-linked povidone, povidone iodine, etc., which are widely used in chemical industry, electronics, medicine, cosmetics, food and other industries. Since the product was put on the market in June 2009, it has been recognized and trusted by users for its good quality.