Dihydroterpineol preparation method

A technology for dihydroterpineol and terpineol, which is applied in hydrogenation preparation, preparation of organic compounds, chemical instruments and methods, etc., can solve problems such as low yield of dihydroterpineol, and achieve the effect of improving yield

Inactive Publication Date: 2015-09-16
WUZHOU SONGHUA AROMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing dihydroterpineol, which can solve the problem of low yield of dihydroterpineol in the common preparation process of dihydroterpineol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of this dihydroterpineol comprises the following steps:

[0026] A, put 1000g terpineol and 10g Raney nickel into the reactor, and heat to 62°C;

[0027] B, after A step, feed hydrogen into this reactor, and carry out hydrogenation reaction according to the following operating conditions:

[0028] Hydrogen preheating temperature: 62°C;

[0029] Hydrogen purity: 99.99%;

[0030] Hydrogenation reaction temperature: 62°C;

[0031] Hydrogenation reaction pressure: 0.01MPa;

[0032] Hydrogenation reaction time: 3h;

[0033] C. After step B, cool the material, leave it to stand for stratification, and filter to obtain it.

[0034] The yield of the dihydroterpineol that the present embodiment makes is 99.5%.

Embodiment 2

[0036] The preparation method of this dihydroterpineol comprises the following steps:

[0037] A, put 1000g terpineol and 50g Raney nickel into the reactor, and heat to 65°C;

[0038] B, after A step, feed hydrogen into this reactor, and carry out hydrogenation reaction according to the following operating conditions:

[0039] Hydrogen preheating temperature: 65°C;

[0040] Hydrogen purity: 99.95%;

[0041] Hydrogenation reaction temperature: 65°C;

[0042] Hydrogenation reaction pressure: 0.1 MPa;

[0043] Hydrogenation reaction time: 1h;

[0044] C. After step B, cool the material, leave it to stand for stratification, and filter to obtain it.

[0045] The yield of the dihydroterpineol that present embodiment makes is 99.6%.

Embodiment 3

[0047] The preparation method of this dihydroterpineol comprises the following steps:

[0048] A, put 1000g terpineol and 30g Raney nickel into the reactor, and heat to 60°C;

[0049] B, after A step, feed hydrogen into this reactor, and carry out hydrogenation reaction according to the following operating conditions:

[0050] Hydrogen preheating temperature: 60°C;

[0051] Hydrogen purity: 99.98%;

[0052] Hydrogenation reaction temperature: 60°C;

[0053] Hydrogenation reaction pressure: 0.05MPa;

[0054] Hydrogenation reaction time: 2h;

[0055] C. After step B, cool the material, leave it to stand for stratification, and filter to obtain it.

[0056] The yield of the dihydroterpineol that the present embodiment makes is 99.7%.

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PUM

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Abstract

The present invention discloses a dihydroterpineol preparation method, and belongs to the technical field of forest chemical industry products. According to the present invention, according to a certain ratio, 100 parts of terpineol and 1-5 parts of Raney nickel are placed into a reactor and heated to a temperature of 60-65 DEG C, hydrogen gas is introduced into the reactor, a hydrogenation reaction is performed according to a certain operating condition, and finally cooling material discharge, standing layering, and filtering are sequentially performed to prepare the finished product; and the operation conditions of the hydrogenation process are adjusted and the corresponding raw material ratio is matched so as to increase the dihydroterpineol yield.

Description

technical field [0001] The invention belongs to the technical field of preparation of forest chemical products, and in particular relates to a preparation method of dihydroterpineol. Background technique [0002] Dihydroterpineol, also known as hydrogenated terpineol, has several isomers. It is a colorless oily liquid with a sweet and pleasant lilac aroma and a long-lasting fragrance. It is a good raw material for blending flavors, As well as a good solvent, it can be used to prepare hydrogen peroxide, paint, etc., and has a wide range of uses. [0003] At present, the commonly used preparation process of dihydroterpineol is to use terpineol as a raw material and Raney nickel as a catalyst to prepare it by catalytic hydrogenation. But this process is not yet perfect, and the yield of the dihydroterpineol it makes is not very high. Contents of the invention [0004] The invention provides a method for preparing dihydroterpineol, and the method can solve the problem of low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/135C07C29/17
CPCC07C29/172C07C2601/14C07C31/1355
Inventor 陈伟强陈键泉黄宇平杨韶平刘娟娟李战
Owner WUZHOU SONGHUA AROMATIC CHEM
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