Composite solid catalyst for preparing methyl salicylate and preparation method thereof

A solid catalyst, methyl salicylate technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve problems affecting processing efficiency and product quality, catalysts The problems of poor catalytic effect and poor recycling rate can reduce the difficulty of sewage treatment, reduce the cost of sewage treatment, and facilitate recycling and utilization.

Inactive Publication Date: 2016-04-20
ZHENJIANG GAOPENG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Methyl salicylate in the prior art adopts the method of collecting the branches and leaves of the Rhododendronaceae plant Pleurotus chinensis, extracting the available wintergreen oil by steam distillation, or separating the water from the natural essential oil by means of fractionation. The method of methyl cylate has long processing time, low product purity and high cost, and is generally not used in industrialized prod

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] A preparation method of a composite solid catalyst for preparing methyl salicylate, the preparation method is as follows:

[0033] (1) Preparation of modified composite soil particles

[0034] 1. Put the diatomite into the acetic acid aqueous solution, the volume ratio of the diatomite to the acetic acid aqueous solution is 1:1.2, the pH of the acetic acid aqueous solution is 3, soak for 5 hours, then pour out the acetic acid aqueous solution, and water the diatom The soil is washed to a pH of 6.5 to make modified diatomite;

[0035] 2. Put the attapulgite into the hydrochloric acid aqueous solution, the volume ratio of the diatomite to the acetic acid aqueous solution is 1:1.4, the pH of the hydrochloric acid aqueous solution is 2, soak for 4.5 hours, then pour out the hydrochloric acid aqueous solution, and water the diatomite Washed to pH 7.0 to make modified attapulgite;

[0036] ③Stir and mix 28 parts of modified diatomite, 15 parts of modifie...

Example Embodiment

[0039] Example 2

[0040] A preparation method of a composite solid catalyst for preparing methyl salicylate, the preparation method is as follows:

[0041] (1) Preparation of modified composite soil particles

[0042] ①Put the diatomite into the acetic acid aqueous solution, the volume ratio of the diatomite to the acetic acid aqueous solution is 1:1.3, the pH of the acetic acid aqueous solution is 3.6, soak for 5.2 hours, then pour out the acetic acid aqueous solution, and water the diatom The soil is washed to a pH of 6.8 to make modified diatomite;

[0043] 2. Put the attapulgite into the hydrochloric acid aqueous solution, the volume ratio of the diatomite to the acetic acid aqueous solution is 1:1.3, the pH of the hydrochloric acid aqueous solution is 2, soak for 4 hours, then pour out the hydrochloric acid aqueous solution, wash the diatomite with water Washed to pH 6.9 to make modified attapulgite;

[0044] ③ Stir and mix 31 parts of modified diatomite, 17 parts of ...

Example Embodiment

[0047] Example 3

[0048] A preparation method of a composite solid catalyst for preparing methyl salicylate, the preparation method is as follows:

[0049] (1) Preparation of modified composite soil particles

[0050] ①Put the diatomite into the acetic acid aqueous solution, the volume ratio of the diatomite to the acetic acid aqueous solution is 1:1.4, the pH of the acetic acid aqueous solution is 3.5, soak for 5.1 hours, then pour out the acetic acid aqueous solution, and water the diatom The soil is washed to a pH of 6.5 to make modified diatomite;

[0051] 2. Put the attapulgite into the aqueous hydrochloric acid solution, the volume ratio of the diatomite to the aqueous acetic acid solution is 1:1.2, the pH of the aqueous hydrochloric acid solution is 3, soak for 5 hours, then pour off the aqueous hydrochloric acid solution, wash the diatomite with water Washed to pH 7.0 to make modified attapulgite;

[0052] ③Stir and mix 25 parts of modified diatomite, 13 parts of m...

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PUM

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Abstract

The invention relates to a composite solid catalyst for preparing methyl salicylate and a preparation method thereof. In the composite solid catalyst, the mass ratio of modified composite soil particles to dicyclohexylcarbodiimide to 4-dimethylaminopyridine is 20:9:8, wherein the modified composite soil particles are prepared from the following components in parts by mass: 20-35 parts of modified diatomite, 10-20 parts of modified attapulgite clay, 3-12 parts of hydroxy propyl cellulose, 1-4 parts of carboxymethylcellulose and 8-16 parts of water. The preparation method has the advantages of high catalyzing rate, convenience in recycling and utilization, contribution to reduction of the process difficulty, and increase of the production efficiency.

Description

technical field [0001] The invention relates to a composite solid catalyst for preparing methyl salicylate and a preparation method thereof, belonging to the technical field of chemical production. Background technique [0002] Methyl salicylate is a colorless to pale yellow transparent liquid with a fragrance like wintergreen oil and can be used as a solvent and intermediate, such as the reaction of methyl salicylate with ammonia to produce salicylamide, which is used as an antipyretic and painkiller B Salicylamide itself is also an antipyretic and analgesic, which can be used in the manufacture of insecticides, fungicides, spices, paints, cosmetic inks, and fiber dyeing aids. [0003] Methyl salicylate in the prior art adopts the method of collecting the branches and leaves of the Rhododendronaceae Phytophthora japonica, extracting with steam distillation to obtain the wintergreen oil and then rectifying, or separating the water from the natural essential oil by means of f...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/02C07C67/08C07C69/84
CPCB01J31/06B01J35/026B01J2231/49C07C67/08C07C69/84
Inventor 王成栋王成慧
Owner ZHENJIANG GAOPENG PHARMA
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