.

Proprietary Technology and Plants China

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.



Отправить запрос, связаться с поставщиком

Кому: Hubei Sanli Fengxiang Technology Co., Ltd
Ваш E-mail:
Текст письма:


Send to other suppliers

Другие товары поставщика

Methylal Refining Technology China
Methylal Refining Technology China Air Separation Packing Air Separation Unit (ASU) Packing Air Separation Packing Air Separation Packing Technology Distillation Technolo...
Crude Aromatic Separation Technology
Crude Aromatic Separation Technology Acetate Series Technology TechnologyIntrodction Acetate as green solvents are widely used in all fields. Our company adopts continuous esterifica...
Column Internals manufacturer
Column Internals manufacturer Column/Tower Internals Column Internals Distillation Technology and Plant Our company has excellent Column Internalstechnical personnel, includi...
Sheets Combined Corrugated Structured Packing
Sheets Combined Corrugated Structured Packing Each periodic ripple of the Zupak is composed of more than four intermittent planar graphic sheets located on four planes. The lateral projection ...
Ethyl Acetate Plant and Process Technology
Ethyl Acetate Plant and Process Technology There are 4 main prevailing processes for , i.e. Direct Esterification Process, Acetaldehyde Condensation Process, Ethanol Dehydration Process and...
Все товары поставщика

Похожие товары

DT-i Servo Energy-saving Injection Molding Machine
DT-i Servo Energy-saving Injection Molding Machine Продавец: Tederic machinery Co., Ltd. Introduction DT-i servo energy saving injection molding machine is basically the High rigidity do...
jaw crusher
jaw crusher Продавец: HXJQ Machinery Jaw crusher is one kind of the best-selling crusher machine for stones and ores. Due to its high ...
BSU universal crusher
BSU universal crusher Продавец: jiangyin brightsail machinery co.,ltd BSU universal crusher Introduction: BSU universal crusher is widely applied in medical, chemi...
Proprietary Technology and Plants China
Proprietary Technology and Plants China Продавец: Hubei Sanli Fengxiang Technology Co., Ltd Dimethyl Carbonate (DMC) Refining Technology Proprietary Technology and Plants TechnologyIntrod...
Proprietary Technology and Plants China
Proprietary Technology and Plants China Продавец: Hubei Sanli Fengxiang Technology Co., Ltd Crude Aromatic Separation Technology Proprietary Technology and Plants TechnologyIntrodction: ...