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Synthesis of alpha-terpineol with one-step catalysis of nano-polyaniline solid acid

A nano-polyaniline and solid acid catalyst technology, applied in organic chemistry, hydroxyl addition preparation, etc., can solve the problem of low conversion rate of turpentine α-terpineol, etc., achieve high catalytic activity, save production cost, and easy separation Effect

Inactive Publication Date: 2008-09-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid acid catalyst is environmentally friendly and the product is easy to separate, the conversion rate of turpentine and the selection of α-terpineol are relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First prepare 200 ml of sulfuric acid solution with a concentration of 0.2 mol / L, and then divide this solution into two equal parts. Add aniline monomer in wherein a part of acidic solution, form the aniline solution that concentration is 0.1mol / L, add ammonium persulfate in another part of acidic solution, form ammonium persulfate solution, the molar concentration of said aniline solution and The molar concentration ratio of the ammonium persulfate solution was 1.0. Then quickly pour the ammonium persulfate solution into the aniline solution at room temperature, and stir vigorously for 4.5 hours, then wash with distilled water and ethanol three times in turn, and vacuum-dry the obtained blue-black solid powder at 65°C for 12 hours , to obtain nanometer polyaniline solid acid catalyst. Under the action of polyaniline solid acid catalyst doped with sulfuric acid, α-terpineol was synthesized in one step at a certain temperature with turpentine as raw material and ethano...

Embodiment 2

[0021] First prepare 200 ml of hydrochloric acid solution with a concentration of 0.6 mol / L, and then divide this solution into two equal parts. Add aniline monomer in wherein a part of acidic solution, form the aniline solution that concentration is 0.24mol / L, add ammonium persulfate in another part of acidic solution, form ammonium persulfate solution, the molar concentration of said aniline solution and The molar concentration ratio of the ammonium persulfate solution was 0.8. Then quickly pour the ammonium persulfate solution into the aniline solution at room temperature, and stir vigorously for 5 hours, then wash with distilled water and ethanol for 4 times in turn, and vacuum-dry the obtained blue-black solid powder at 70°C for 10 hours , to obtain nanometer polyaniline solid acid catalyst. Under the action of polyaniline solid acid catalyst doped with hydrochloric acid, α-terpineol was synthesized in one step at a certain temperature with turpentine as raw material and...

Embodiment 3

[0023]First prepare 200 ml of nitric acid solution with a concentration of 0.8 mol / L, and then divide this solution into two equal parts. Add aniline monomer in wherein a part of acidic solution, form the aniline solution that concentration is 0.36mol / L, add ammonium persulfate in another part of acidic solution, form ammonium persulfate solution, the molar concentration of said aniline solution is the same as The molar concentration ratio of the ammonium persulfate solution was 1.1. Then quickly pour the ammonium persulfate solution into the aniline solution at room temperature, and stir vigorously for 7 hours, then wash with distilled water and ethanol for 5 times, and dry the resulting blue-black solid powder in vacuum at 80°C for 8 hours , to obtain nanometer polyaniline solid acid catalyst. Under the action of polyaniline solid acid catalyst doped with nitric acid, α-terpineol was synthesized in one step at a certain temperature with turpentine as raw material and ethano...

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PUM

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Abstract

The present invention relates to a one-step method of catalytic synthesis of alpha-terpineol with nano polyaniline solid acid and solid acid catalyst. The method is characterized in that the raw material of turpentine (with the content of alpha-pinene more than 85 percent) and the solvent of ethanol are used for the one-step synthesis of the alpha-terpineol when the nano polyaniline solid acid mixed with acid is used as a catalyst. The catalyst of the nano polyaniline solid acid can be prepared in a simple way; the cost is low; and the catalyst has high catalytic activity and selectivity for the one-step hydration to prepare the alpha-terpineol (the transformation ratio of the alpha-pinene reaches to more than 95 percent and the yield of the alpha-terpineol reaches to more than 65 percent). At the same time, the catalyst has the characteristics of simple separation and long service life.

Description

technical field [0001] The invention relates to a preparation method for one-step synthesis of α-terpineol by using a nano polyaniline solid acid catalyst. It belongs to the field of preparation of α-terpineol. Background technique [0002] Turpentine is an important natural renewable resource, of which turpentine (mainly composed of α-pinene) accounts for 1 / 5. Terpineol is the product with the largest output in the deep processing of turpentine oil, and is widely used in flavors and fragrances, cosmetics, cleaning agents, fungicides, and foaming agents for flotation minerals. At present, the synthesis process of terpineol is classified according to the reaction procedure, which can be roughly divided into two categories, namely one-step method and two-step method. The two-step method is that turpentine oil is catalyzed by acid to first obtain terpene diol hydration, and then terpineol is obtained through dilute acid catalyzed dehydration. This method has low investment, ...

Claims

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Application Information

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IPC IPC(8): C07C35/08C07C29/04
Inventor 贾庆明王亚明陕绍云蒋丽红
Owner KUNMING UNIV OF SCI & TECH
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