Project Introduction: Dimethyl carbonate (abbreviated as DMC) has received widespread attention from both domestic and international communities in recent years as an environmentally friendly green chemical product. It possesses excellent reactivity and can replace highly toxic or carcinogenic substances such as phosgene, dimethyl sulfate, chloromethane, and methyl chloroformate in various fields for reactions including carbonylation, methylation, metathesis, and transesterification to produce a variety of important chemical products. The main synthesis processes for DMC include the phosgene method, methanol oxidation carbonylation method, and transesterification method. The phosgene method, due to the use of highly toxic phosgene, results in poor product quality and application limitations, and the use of phosgene itself is also restricted, leading to its gradual elimination. The latter two methods are currently the main production methods for DMC, with China's DMC production primarily based on the transesterification method. The transesterification process involves a large number of reactions and uses atmospheric and pressurized distillation towers, which consume high energy. The annual steam consumption is relatively large, and with the increasing domestic energy prices year by year, the production cost of products has grown rapidly, posing a serious threat to the profit margins of the products. This project is based on proprietary patented technology, which combines heat pump and pinch point technologies with the traditional ester exchange synthesis and azeotropic distillation separation processes. The technology involves comprehensive energy matching and optimization of existing production processes, as well as energy-saving retrofits for equipment such as reaction distillation towers that consume a lot of energy. By pressurizing and heating the top steam, it can be directly used as a heat source for the bottom reboiler without the need for a top condenser or its cooling water consumption, nor is there a need to use boilers to heat the bottom reboiler. After adopting this project's technological transformation, the traditional process can achieve self-production and self-consumption of energy in the core process section, greatly reducing the amount of steam consumed and also lowering the demand for cooling water, resulting in significantly reduced production costs. The main technological innovation and leadership of this project are as follows: ① The project technology has independent intellectual property rights, with good technical implementation barriers; ② We have a strong engineering practical experience, and we are currently in the process of renovating a 10,000-ton pilot production plant. A related technology's anhydrous ethanol annual production of 50,000 tons pilot plant has been operating well for nearly two years. ③ Together with relevant construction units and intellectual property sharing units, we have the overall turnkey capability of engineering design, renovation, and construction. Application prospects and fields: Dimethyl carbonate has unique chemical properties, is non-toxic, low in pollution, and can be widely used in organic synthesis, gasoline additives, solvents, pharmaceuticals, pesticides, and other fields. The market demand for it has grown rapidly in recent years. Currently, the domestic dimethyl carbonate market is short of products, with considerable production profits, and many manufacturers have been expanding their production scale in recent years. However, with China's energy structure adjustment, The issue of how to reduce the energy consumption in the production of dimethyl carbonate by transesterification method has become increasingly prominent due to the increase in prices of energy sources such as kerosene. The patented process of this project can effectively reduce energy costs. Taking a 10,000-ton process as an example, only by retrofitting the reaction distillation tower, the annual steam consumption can be reduced by about 60,000 tons. Excluding the additional electricity cost after the energy-saving retrofit, the annual energy-saving cost is about 10 million yuan. If the entire process is carried out with energy recycling and comprehensive utilization, the potential for energy saving is even greater. Taking a 10,000-ton per year production process as an example, by retrofitting the reaction distillation tower, the total investment for project retrofit is about 5 million yuan, and the retrofit cost can be recovered within half a year, with an annual energy saving cost of about 10 million yuan. Cooperation methods include technology transfer, technical commissioning (cooperative) development, technology licensing, and technology equity participation. The cooperating party is a chemical enterprise engaged in the production of DMC by transesterification method.