Synthesis gas is converted into a hydrocarbon wax (a mixture of long-chain alkanes) by heating it and passing the vapour over a cobalt catalyst (the Fischer-Tropsch process) (Figure 2, route 5). The (SMDS) is a modern development of this process. The hydrocarbon waxes are subsequently catalytically cracked with excess hydrogen () (Figure 2, route 9) to form smaller alkanes, for example:
Versalis/CB&I’s methyl oxycarbonylation technology is based on a single-step, liquid-phase, cuprous chloride–catalyzed process, which was originally developed by Polymeri/EniChem. Versalis was created as a subsidiary or rename for Polymeri/EniChem. CB&I is the partner in licensing and engineering of contracts. Our evaluation of the technology is based on a single-train plant, producing about 25,000 metric tons per annum (MTPA) of DMC. The chemistry of the process is simple, but small amounts of corrosive by-products are generated that necessitate the use of glass-lined material for certain equipment. The overall yield of DMC, according to IHS estimates, is 91.9% (based on methanol). Versalis/CB&I primarily produces DMC for the merchandise market.
dimethyl carbonate MSDS - Miami Chemical
Another way to produce propene is via methanol (produced from biomass via synthesis gas), which is an example of the MTO (Methanol To Olefins) process. (Olefin is the older name for the homologous series, alkenes). Methanol can be converted into high purity ethene and propene via dimethyl ether (Figure 3, routes 10 and 9). Methanol vapour is passed over alumina at ca 600 K. An equilibrium mixture of methanol, dimethyl ether and steam is produced, containing about 25% methanol:
Dimethyl carbonate is often considered to be a green reagent
Dimethyl carbonate (DMC) is an important industrial chemical. It is used as an intermediate for making polycarbonate, which consumes roughly 50% of its production. Other notable areas of its use include solvents, pesticides, and pharmaceuticals. It is also used as a chemical reagent, particularly for methylation and methoxycarbonylation reactions. It is nontoxic to humans and does not negatively impact the environment, and is also quickly biodegradable, which makes it especially suitable for use as a chemical.
China Dimethyl Carbonate Dmc, Dimethyl Carbonate …
Effective against typical beverage-spoiling microorganisms, like yeasts and fermentative bacteriaDimethyl carbonate, often abbreviated DMC, is a flammable clear liquid boiling at 90 °C.
Dimethyl Carbonate (DMC) by UBE Chemical Europe - …
and Guangxing, L., "The Transesterification of Dimethyl Carbonate with Phenol over MG-Al-hydrotalcite Catalyst," Organic Process Research & Development, 8, 372(2004).
Kinetics of dimethyl carbonate synthesis from methanol …
Ube’s methanol oxycarbonylation technology is based on a two-step (or indirect), gas-phase, palladium–copper chloride–catalyzed process. This process has a somewhat more complex chemistry. In the first-phase, methyl nitrite (MN) is carbonyl-ated producing DMC and nitric oxide (NO) in a fixed-bed reactor. In the second step, NO reacts noncatalytically with oxygen and methanol, producing MN and water. This MN is recycled into the first step. Hence, basically only CO, O2, and methanol are consumed in the process. Overall yield of DMC is equivalent to 92.5% (based on methanol). Ube’s process, according to IHS estimates, is somewhat costlier than Versalis/CB&I’s process in terms of capital cost. However, the production cost of DMC for the two processes is pretty close, mainly due to the fact that the Ube process produces dimethyl oxalate also as a by-product, which improves the economy of the process. Ube produces DMC primarily to sell it in the merchandise market.
Dimethyl dicarbonate for synthesis | VWR
I am designing a battery box to house lithium ion batteries in an electric vehicle. These batteries use an electrolyte which probably contains carbonate esters (eg. ethylene carbonate, dimethyl carbonate, diethyl carbonate).