Process for synthesizing vinylene carbonate

A technology of vinylene carbonate and alloy, applied in the field of synthesis of vinylene carbonate, can solve problems such as complex process, prone to danger, environmental pollution, etc., and achieve the effect of simple reaction process, easy industrial scale-up, and remarkable economy

Inactive Publication Date: 2006-06-21
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

The route of chlorination and dechlorination has the following disadvantages: first, chlorine gas is a highly toxic gas, which is extremely dangerous, and the chlorinated products generated in the reaction process will also cause environmental pollution, and the generated HCl will corrode the pipeline
Secondly, this route is carried out in two steps...

Method used

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  • Process for synthesizing vinylene carbonate

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Experimental program
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Effect test

Embodiment 1

[0019] al 2 o 3 The carrier was crushed and sieved, and 20-40 meshes were selected. After activation at 500°C for two hours, the iron catalyst was loaded on Al 2 o 3 On the carrier, get Fe 2 o 3 with Al 2 o 3 The mass ratio of the catalyst is 1:4. Add the catalyst into the fixed-bed reactor, and ethylene carbonate (EC) is continuously fed into the micro-fixed-bed reactor at a space velocity of 2 g / h mlcat. with a micro-injection pump. The reaction temperature is 360 °C and the reaction pressure is 0.2 MPa, at the same time, nitrogen was introduced as carrier gas and protective gas for reaction. The reaction product was collected by a condensing device and analyzed by gas chromatography. The yield of vinylene carbonate (VC) was 60%.

Embodiment 2

[0021] Other conditions are as example 1, add K 2 O (2%) co-catalyst, vinylene carbonate (VC) yield is 70%.

Embodiment 3

[0023] Other conditions are as in Example 1, adding 3% of Li(OH) cocatalyst, and the yield of vinylene carbonate (VC) is 69%.

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Abstract

A method for synthesing vinylene carbonate, employing fixed bed reactor, adding catalyst, employing nitrogen, argon gas or hydrogen as diluting gas and protecting gas, the reaction temperature is 200-600 Deg C, the velocity of feeding is 1-100 g/h mlcat, the reaction pressure is 0.1-10 Mpa, getting the vinylene carbonate through vinyl carbonate catalytic dehydrogenation. The invention is characterized by the higher selectivity of reaction product, less side product, simple operation, no corrosion and pollution in reacting course.

Description

technical field [0001] The invention belongs to a method for synthesizing vinylene carbonate. Background technique [0002] Vinylene carbonate (VC or VCA for short), also known as vinylene carbonate, is an intermediate of organic synthesis. It can be used in lithium-ion batteries and lithium batteries as an additive to inhibit the decomposition of the electrolyte. Make the graphite negative electrode form a good SEI film, improve the reversible capacity and stability of the electrode; it can also be used as a good non-aqueous electrolyte solution for lithium batteries. At the same time, since vinylene carbonate (VC) contains reactive cyclocarbonate groups, this group has the characteristics of reacting with amino groups to form hydroxyl groups and carbamate groups under normal temperature and conditions, making it an ideal The monomers containing active groups can be used in the synthesis of immobilized enzyme carriers. And its unique structure is very easy to polymerize t...

Claims

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Application Information

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IPC IPC(8): C07D317/40
Inventor 孙予罕魏伟马珺赵宁王秀芝李军平周洁
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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