Dimethyl Carbonate (DMC) Refining Technology

• 

Dimethyl Carbonate (DMC) Refining Technology

Proprietary Technology and Plants

Technology Introdction:

Dimethyl carbonate (DMC) is an important organic chemical intermediates, it widely used in carbonylation, methylation, methoxylation and carbonyl methylation and other organic synthesis reaction. Because DMC is non-toxic, it can replace the highly toxic phosgene, methyl chloroformate, dimethyl sulfate as a methylating agent or carbonylation agent used to improve the safety of production operations and reduce environmental pollution. As a solvent, DMC can replace freon, trichloroethane, trichlorethylene, benzene, xylene and so on for paint coatings, cleaning solvents. As a gasoline additive, DMC can improve its octane number and oxygen content, thereby enhancing its antiknock. In addition, DMC can be used as detergent, surfactant and softener additives.

In the process of oxidizing carbonylation of methanol to dimethyl carbonate, the reaction solution contains a large amount of unreacted raw materials and by-products (such as formaldehyde, trioxaldehyde and the like) in addition to DMC, and further separation is required to obtain DMC products.

As the raw materials containing formaldehyde, trioxaldehyde and other impurities, these impurities on the follow-up distillation process and equipment selection has a significant impact, so the need for pre-treatment device for pre-removal, removal of formaldehyde, trimethyl formaldehyde after the material into the follow-up Of the distillation system. Removal of formaldehyde and paraformaldehyde materials due to methanol and DMC forming azeotrope, ordinary distillation can not get a pure product, therefore, it usually using two-step separation combined：The first step is the initial distillation stage, the use of azeotropic distillation way, in the packed column to obtain methanol-DMC azeotrope, and other products separated；In the second step, the DMC was obtained by the effective separation method. The main methods were low temperature crystallization, extraction distillation, azeotropic distillation and pressurized distillation. The purity was higher than 99.9 % High purity DMC products.

To a company 30,000 tons / year crude dimethyl carbonate (DMC) refined, for example.

Другие товары поставщика

	Urea Formaldehyde (UF) Glue Plant	Urea Formaldehyde (UF) Glue Plant Agent Technology and Plants   Technology Introduction   The Urea Formaldehyde (UF) technology pr...
	Distillation Purification Technology	Proprietary Technology and Plants Technology Introduction: SL TEC has collaborated with Tianjian University to establish a distillation engineering...
	O-Dihydroxybenzene Plant	O-Dihydroxybenzene Plant Proprietary Technology and Plants Technology Introduction: There are over 10 methods for hydroquinone production, and amon...
	Crude Phenol Purification Technology	Proprietary Technology and Plants  Technology Introduction: Phenols have a variety of compounds, with the most important ones incl. ph...
	Proprietary Technology and Plants	Ethyl Acetate Plant and Process Technology Proprietary Technology and Plants Technology Introduction: There are 4 main prevailing processes for ...

Похожие товары

	BS cryogenic grinding mill machine	Продавец: jiangyin brightsail machinery co.,ltd	BS cryogenic grinding mill machine Grinding Machine Introduction: Cryogenic grinder machine&nb...
	BSF High-efficient Mill	Продавец: jiangyin brightsail machinery co.,ltd	BSF High-efficient Mill Grinding Machine BSF High-efficient Mill is a kind of small hammer...
	BS hammer mill unit	Продавец: jiangyin brightsail machinery co.,ltd	BS hammer mill unit Grinding Machine Main Usage:     The machine has a very goo...
	BSP Ultra-fine Pulverizer unit	Продавец: jiangyin brightsail machinery co.,ltd	BSP Ultra-fine Pulverizer unit Grinding Machine BSP Ultra-fine Pulverizer unit is also called&n...
	BSG Cyclone dust collecting Grinding unit	Продавец: jiangyin brightsail machinery co.,ltd	BSG Cyclone dust collecting Grinding unit Grinding Machine Main Usage:    BSG Cyclon...