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Method for removing methylene of gingili wood phenols

A methyleneation and lignification technology, applied in organic chemistry and other fields, can solve problems such as increased side reactions and reduced product purity

Inactive Publication Date: 2008-02-27
JOJIA BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the reaction time is prolonged, though the conversion rate of sesamin can be increased, the side reaction increases, and the product purity decreases, which increases the difficulty of subsequent purification on the contrary.

Method used

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  • Method for removing methylene of gingili wood phenols
  • Method for removing methylene of gingili wood phenols
  • Method for removing methylene of gingili wood phenols

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Experimental program
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Embodiment Construction

[0056] In order to make the purpose, features, and advantages of the present invention more clearly understood by those skilled in the art, preferred embodiments of the present invention will be described in detail below with accompanying drawings.

[0057] The specific embodiment of the present invention is shown in Figure 7, which is a flow chart of the demethylation reaction of sesame lignin. Its general mode of operation is as follows:

[0058](1) The water under normal temperature and pressure is temporarily stored in the T1 storage tank 100, and after being pressurized by the P1 high-pressure pump 110, it is heated to the set temperature by the H1 heat exchanger 120;

[0059] (2) MDP sesamin is temporarily stored in T2 storage tank 200, and through P2 high-pressure pump 210, after pressurization, it merges with high-temperature and high-pressure water and enters RX reactor 130. If necessary, a check valve 220 can be installed before the merger;

[0060] (3) The aqueous ...

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Abstract

The invention discloses a demethylening method of sesamol, which comprises the following steps: (1) pressurizing liquid water; heating over 180 deg. c to exert enough pressure to keep water liquid or in the hypercritical condition; (2) blending xylon phenol and the water in the step (1) under the same operation condition; continuing for a certain time to react; making the solution possess the component of demethylene sesamol; obtaining the solution of derivative of demethylene sesamol. The invention combines the free oxyhydrogen radical to reduce temperature and pressure, which reduces the equipment cost and increases economical predominance.

Description

technical field [0001] The invention utilizes high-temperature liquid water to carry out the demethylation reaction (demethylnation) of sesame lignins to obtain lignins derivatives with water-soluble characteristics. After heating, the water becomes less polar and can dissolve sesame lignin, so the reaction is carried out in a single phase, so the degree of reaction is easy to control, and there are few by-products and high product purity. The present invention also discloses that the dissociation degree of water is the largest in a specific temperature range to accelerate the reaction. At the same time, the present invention further discloses the technology of combining the generation of hydroxyl radicals to accelerate the reaction or reduce the reaction conditions, so as to increase the economic advantages and industrial practicability of the technology of the present invention. Background technique [0002] 1. Physical and chemical properties and characteristics of water...

Claims

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Application Information

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IPC IPC(8): C07D493/04
Inventor 梁明在
Owner JOJIA BIO TECH
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