Dimethyl carbonate (DMC) is an important organic chemical intermediate, because its molecular structure contains carbonyl, methyl, methoxy and carbonyl methoxy, so it can be widely used in carbonylation, methylation, methoxy and carbonyl methylation and other organic synthesis reactions, used in the production of polycarbonate, isocyanate and other chemical products. Because DMC is non-toxic, it can be used as methylating agent or carbonylation agent instead of highly toxic phosgene, methyl chloroformate, dimethyl sulfate, etc. As a solvent, DMC can replace FREon, trichloroethane, trichloroethylene, benzene, xylene and other used in paint coating, cleaning solvent, etc. In addition, DMC can also be used as detergent, surfactant and softener additives.

Despite its wide range of uses, it is difficult for dimethyl carbonate to become a bulk chemical product due to the existing process routes and production costs.

The main problems: first, although in lithium battery electrolyte, developer, coatings, adhesives have been widely used, but it is difficult to have the amount of amplification;

Second, the propylene glycol market produced by the relatively mature propylene oxide route is difficult to develop, and the two products often appear "lame";

Three is used for the premise of gasoline additives must have a greater reduction in cost, but the reality is difficult to do;

Fourth, it is used for polycarbonate synthesis raw materials. The purity and quantity of propylene (ethyl) carbonate must meet the requirements of the subsequent device. Therefore, the process development route and application of dimethyl carbonate have been two hot spots in the industry. With the production of the above problems, there will be a breakthrough point to solve.

As a gasoline additive, DMC can improve the octane number and oxygen content, and then improve the knock resistance. DMC has the properties of high oxygen content (molecular oxygen content up to 53%), excellent octane increase (octane number up to 105), no phase separation, low toxicity and rapid biodegradability, so that when gasoline reaches the same oxygen content, the amount of DMC used is 4.5 times less than methyl tert-butyl ether (MTBE). Thus, the total emission of hydrocarbons, carbon monoxide and formaldehyde in automobile exhaust is reduced. In addition, the shortcomings of common gasoline additives that are easily soluble in water and pollute underground water are overcome. Therefore, DMC will become one of the most potential gasoline additives to replace MTBE.

However, to replace MTBE, both volume and price must be met.

The amount of gasoline used in our country is at the level of 130 million tons, and the amount of MTBE is 10 million tons. Even with the partial substitution, the production of dimethyl carbonate must reach several million tons. Obviously, the yield difference of dimethyl carbonate under the existing process is not a little bit.

The most important thing is the price. I have checked the price of dimethyl carbonate on the Internet. Recently, it has been rising all the way to 12,000 yuan/ton, and the main reason for the price support is that the price of propylene oxide is at the highest level in recent times. Even at the bottom of the market, the price of dimethyl carbonate is hardly enough to justify the use of gasoline additives. The existing domestic production enterprises need propylene oxide is purchased (produced by itself is also purchased propylene).

2, Runze Chemical Co., Ltd. using ethylene oxide transesterification production of another benefit is the product glycol market is good.

Propylene glycol produced by propylene oxide route has always been limited by small market capacity and difficult market development, so it is often bought at a loss. The two products can also be "bad" and bad, even using propylene glycol as a by-product of the production of dimethyl carbonate. According to this news introduction, the production of ethylene glycol products to achieve the main content of 99.9 percent of the GB polyester grade. Therefore, ethylene glycol produced by the dimethyl carbonate process will be very competitive with the high demand for ethylene glycol.

3. Runze Chemical Co., Ltd. produces ethylene carbonate with ethylene oxide and carbon dioxide, which provides mature technical basis for large-scale transesterification production of polycarbonate supporting enterprises.

With the maturity and adoption of the non-phosgene process of producing polycarbonate in Runze Chemical Co., LTD., the demand for vinyl carbonate will be hundreds of thousands of tons (there have been data showing that using the transesterification process of non-phosgene, the production of 1 t PC needs to consume 0.35 t DMC equivalent). According to the introduction, in addition to the production capacity of this process, there are three major technological breakthroughs, including the innovation of green homogeneous ionic liquid synthesis catalyst, making the reaction conditions more mild, the conversion rate and yield greatly improved; The reaction system was innovated by jet flow reactor, and the risk of a large amount of ethylene oxide entering the reaction system was solved. The separation system of vinyl carbonate was innovated, and the separation problem caused by easy decomposition of vinyl carbonate was solved.