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Preparation method of high-purity cardol

A high-purity cardolol technology, applied in the field of preparation of high-purity cardolol

Inactive Publication Date: 2021-05-11
常熟耐素生物材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, currently there is not a method that can be used for industrialized efficient separation of high-purity cardol

Method used

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  • Preparation method of high-purity cardol
  • Preparation method of high-purity cardol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step is molecular distillation. After decarboxylation, the cashew nut shell oil is sent to a thin film evaporator for distillation. The set temperature of the thin film evaporator is 170°C and the vacuum degree is 150Pa; The set temperature of the primary molecular distillation is 200°C, and the vacuum degree is 10Pa; the light components obtained by distillation in the primary molecular distillation tower are sent to the secondary molecular distillation tower for distillation, and the set temperature of the secondary molecular distillation is 173°C, and the vacuum degree is 8Pa; The heavy component that grade molecular distillation tower steams is the cardol product, reaches more than 70% by the purity of detecting described cardol product, and the distillation yield of described cardol product is 64.3% (calculation of distillation yield The formula is: the quality of cardol / the quality of cashew nut shell oil after decarboxylation×100%).

[0040] In the seco...

Embodiment 2

[0044] The first step is molecular distillation. After decarboxylation, the cashew nut shell oil is sent to a thin-film evaporator for distillation. The set temperature of the thin-film evaporator is 180°C and the vacuum degree is 160Pa; The set temperature of the primary molecular distillation is 205°C, and the vacuum degree is 12Pa; the light components obtained by distillation in the primary molecular distillation tower are sent to the secondary molecular distillation tower for distillation, and the set temperature of the secondary molecular distillation is 175°C, and the vacuum degree is 10Pa; The heavy component that grade molecular distillation tower steams is the cardol product, reaches more than 70% by the purity of detecting described cardol product, and the distillation yield of described cardol product is 64.1% (calculation of distillation yield The formula is: the quality of cardol / the quality of cashew nut shell oil after decarboxylation×100%).

[0045] In the sec...

Embodiment 3

[0049] The first step is molecular distillation. After decarboxylation, the cashew nut shell oil is sent to a thin film evaporator for distillation. The set temperature of the thin film evaporator is 175°C and the vacuum degree is 155Pa; The set temperature of the primary molecular distillation is 195°C, and the vacuum degree is 10Pa; the light components obtained by distillation in the primary molecular distillation tower are sent to the secondary molecular distillation tower for distillation, and the set temperature of the secondary molecular distillation is 170°C, and the vacuum degree is 10Pa; The heavy component that grade molecular distillation tower steams is the cardol product, reaches more than 70% by the purity of detecting described cardol product, and the distillation yield of described cardol product is 64.0% (calculation of distillation yield The formula is: the quality of cardol / the quality of cashew nut shell oil after decarboxylation×100%).

[0050] In the sec...

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Abstract

The invention discloses a preparation method of high-purity cardol, which is characterized by comprising three times of molecular distillation and two times of separation of products after molecular distillation to improve the industrial purification yield and purity of cardol. The cashew nut shell oil is separated through molecular distillation, small molecular impurities in a distillation base material and oil are removed, heavy components and light components are collected step by step, cardanol and cardol are separated through multiple times of molecular distillation, a cardol product with the purity being 70%-80% is obtained, then chromatographic separation is conducted, and finally high-purity cardol is obtained. And the industrial application prospect is good.

Description

technical field [0001] The invention relates to the field of cardol production, in particular to a method for preparing high-purity cardol. Background technique [0002] Natural cashew nut shell liquid (oil) contains 4 main components of anacardic acid, cardanol, cardol and dimethyl cardol, of which anacardic acid accounts for 90%, and anacardic acid will be deacidified under high temperature conditions, making cashew nuts The acid is converted into cardanol, and about the extraction of cardanol, there are many reported methods for extracting high-purity cardanol, but regarding the cardol in cashew nut shell oil, especially the preparation method of high-purity cardanol Less involved, this is because the high boiling point of cardol and the instability in the heating process have caused certain difficulties in purification and refining, and its application value has been limited. At present, cardol appears as an associated product of cardanol. [0003] Cardol is a polyalke...

Claims

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Application Information

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IPC IPC(8): C07C39/08C07C37/68C07C37/74C07C37/82
CPCC07C37/685C07C37/74C07C37/82
Inventor 刘玲戴志成顾斌王震
Owner 常熟耐素生物材料科技有限公司
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