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Methylal Refining Technology

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Hubei Sanli Fengxiang Technology Co., Ltd

Methylal Refining Technology

Country/Region china
City & Province wuxi jiangsu
Categories Umbrellas & Raincoats

Product Details

 

Methylal Refining Technology

Proprietary Technology and Plants

Technical Features:

Methaldehyde has excellent physical and chemical properties, that is good solubility, low boiling point, and water compatibility can be widely used in cosmetics, pharmaceuticals, household goods, automotive supplies, pesticides, leather polish, cleaning agents, rubber Industrial, paint, paint, ink and other products, but also because the methyl acetal has a good ability to oil and volatile, as a cleaning agent can replace F11 and F113 and chlorine solvent, it is an alternative to freon, reduce volatile organic compounds (VOCs ) Emissions of environmentally friendly production.

 

As the methyl acetal and water, methanol to form azeotrope, the traditional distillation method can only get about 92% of the methylaldehyde ternary azeotrope. However, in the methylal industry, in addition to part of the solvent uses 85% -93% purity, the rest need more than 99% purity of the methyl acetal products. At present, the industrial formaldehyde refining methods are mainly salt distillation, liquid-liquid extraction, ion exchange, adsorption and pressure distillation method.

 

Technology Introdction:

The characteristics of these methods are summarized as follows:

No.ProcessFeature
1Salt distillation methodThe separation process is complex and the operation is demanding
Waste treatment is complex, has been gradually eliminated
2Liquid - liquid extractionThrough the introduction of the third component refined methyl acetal, need to supporting the extraction agent recovery device
Disadvantages: equipment investment, operational energy consumption, the introduction of new impurities into the product
3Ion exchange methodThe crude acetal crude product has passed the strong alkaline anion exchange resin column, strong acid cation exchange resin column to obtain high purity products
Disadvantages: limited processing capacity, resin recycling costs are high
4Adsorption methodThe separation of the alcohol and methyl acetal by molecular sieve was used to separate high purity methylal
Disadvantages: limited handling capacity, one-time investment in adsorbents and high regeneration costs
5Transformed distillationThe use of atmospheric pressure and high pressure, methyl acetal/methanol/water azeotropic composition changes, to achieve methylal refining
The separation efficiency of the equipment is relatively high

 

Our company's methyl acetal technology, according to the customer's requirements for the purity of methyl acetal products to pressure-based distillation to add the method to add.

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