Cashew Nut Shell Liquid (CNSL) Production Technology And Development

Jan 17, 2026

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Traditional and Novel Preparation Methods
Due to the high boiling point and large molecular weight of cardanol, and the presence of unsaturated bonds in its side chain, traditional distillation methods require high temperatures above 300 degrees Celsius and reduced pressure for extraction. This not only leads to the polymerization of cardanol but also reduces its yield and increases energy consumption.

 

However, molecular distillation, as an emerging separation technology, although not yet widely used in industrial production, can operate under extremely high vacuum conditions, allowing liquids to be separated at temperatures far below their boiling points. This technology overcomes the limitations of chemical processing methods, effectively preserving the original properties of the substance and solving problems that conventional distillation techniques cannot. It is particularly suitable for the separation of high-boiling point, heat-sensitive, and easily oxidized substances. Therefore, molecular distillation is undoubtedly a more suitable choice for the preparation of cardanol.

 

Technological Innovation and Breakthroughs
Our team has abandoned traditional distillation methods and bypassed the fifth-generation molecular distillation technology commonly used in China. Instead, through a combination of independent innovation and imported technology, we have successfully adopted a distillation process based on advanced German equipment. This technological breakthrough has resulted in cardanol products with significantly superior color and overall quality compared to domestic counterparts. Our products have been sent to several well-known customers for rigorous testing and have received high praise.

 

Even more noteworthy is our yield of approximately 75%, a figure that far surpasses the 55% of traditional distillation and also exceeds the 70% of the fifth-generation molecular distillation. In addition, our team has developed various preparation technologies for downstream cardanol products, and related products have been widely sampled and tested by numerous well-known customers.

 

With our unique distillation process, our team has not only achieved significant technological breakthroughs but also gained a leading position in the market. We have successfully adopted distillation technology based on advanced German equipment, abandoning traditional distillation methods and the fifth-generation molecular distillation technology commonly used in China, resulting in a significant improvement in the color and overall quality of our cardanol products. This technological advantage has made our products stand out in the market and won the favor of many well-known customers.

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