Dimethyl Carbonate (DMC) Refining Technology

• 

Dimethyl Carbonate (DMC) Refining Technology

Proprietary Technology and Plants

TechnologyIntrodction:

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

	Fixed Bed Process Hydrogen Peroxide Plant	Fixed Bed Process Hydrogen PeroxidePlant Product Description There are several methods for hydrogen peroxide production and manufacturing, among ...
	Proprietary Technology and Plants China	Dimethyl Carbonate (DMC) Refining Technology Proprietary Technology and Plants TechnologyIntrodction: Dimethyl carbonate (DMC) is an important o...
	SL TEC Formaldehyde Plant	SL TEC has close to ten years experience in based on silver contact process(or silver catalyzed process). A lower methanol consumption, higher for...
	Methylal Refining Technology China	Air Separation Packing Air Separation Unit (ASU) Packing Air Separation Packing Air Separation Packing Technology Distillation Technolo...
	Anhydrous formaldehyde plant	SL TEC has close to ten years experience in based on silver contact process(or silver catalyzed process). A lower methanol consumption, higher for...

Похожие товары

	РЕАКТОР С МЕШАЛЬНЫМ ЛОПАСТНЫМ УСТРОЙСТВОМ	Продавец: Jiangsu Sunkaier Industrial Technology Co., Ltd.	РЕАКТОР С МЕШАЛЬНЫМ ЛОПАСТНЫМ УСТРОЙСТВОМ ОПИСАНИЕ Лопастной мешающий реактор типа SK3000E-...
	Intelligent Mechanical Equipment	Продавец: CITIC IC LUOYANG HEAVY MACHINERY CO., LTD	With the development of modern science and technology, industrial arm is a kind of high-tech auto...
	Horizontal Centrifuge Machine	Продавец: CITIC IC LUOYANG HEAVY MACHINERY CO., LTD	TWZ series horizontal vibratory centrifuge belongs to the centrifugal dewatering machine, the ser...
	Wet Grid Ball Mill	Продавец: CITIC IC LUOYANG HEAVY MACHINERY CO., LTD	Wet ball mill is a kind of energy-saving industrial grinding mill which adopts rolling bearings a...
	Vertical Centrifuge	Продавец: CITIC IC LUOYANG HEAVY MACHINERY CO., LTD	The vertical centrifuge machineis made up of the screen which diameter range from 700 to 1,000 mm...