Polyurethane is an important polymer synthetic material used to make foams, fibers, elastomers, synthetic leather, coatings, adhesives, paving materials and medical materials. It is widely used in transportation, construction, light industry, textiles, electromechanical, aviation, medical and health fields. At present, the production of polyurethane around the world uses the phosgene isocyanate route. The international first green production technology of this project replaces highly toxic phosgene with carbon dioxide to green synthesize dimethyl carbonate, and synthesizes carbamates, re-polyols, polyester polyols, polyether polyols and other synthetic polyurethane with low raw material costs.(20 - 30% lower than the phosgene isocyanate route), high conversion rate, clean process, safe and other characteristics, good economy, and strong competitiveness in the international market. With the increasing attention to environmental protection, energy conservation and emission reduction, the development of this project is very important for saving precious energy, utilizing carbon dioxide waste gas, promoting energy conservation and emission reduction, upgrading the industry, and achieving green, low-carbon, and harmonious economic and social development. significance. Key technologies: carbon dioxide coupling process strengthens the synthesis of cyclic carbonate technology, multiple coupling processes strengthens the green synthesis of dimethyl carbonate technology, coupling process strengthens the synthesis of urethane technology, and non-phosgene and non-isocyanate green synthesis of polyurethane technology. An annual output of 50,000 tons of polyurethane, an investment of 260 million yuan, an annual sales profit of 226.87 million yuan, an investment profit margin of 87.26%, and an investment profit and tax rate of 126.6%. The internal rate of return on all investments is 77.61% before income tax and 57.46% after income tax. The break-even point in the year after reaching production capacity is 15.18%, indicating that the project has strong risk resistance. The payback period is 2.53 years (including 1 year construction period).  

Economic benefits are good, and social benefits are especially good. Each ton of carbon dioxide can replace 2.2 tons of phosgene, which can reduce wastewater emissions by more than 30 tons/ton. With an annual output of 50,000 tons of polyurethane, more than 7000 tons of carbon dioxide waste gas can be used to replace more than 15000 tons of highly toxic phosgene and reduce wastewater emissions by more than 200,000 tons.