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Method for producing anisole by catalyzing phenol and methanol

A technology for catalyzing phenol and anisole, which is applied in chemical instruments and methods, physical/chemical process catalysts, dehydration of hydroxyl-containing compounds to prepare ethers, etc. It can solve problems such as high phenol conversion rate, low catalyst service life, and harsh conditions. Achieve the effects of simple preparation process, long service life and high conversion rate

Active Publication Date: 2019-05-28
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although some breakthroughs have been made in the above research, the catalysts all show high initial activity, but as the reaction progresses, the catalyst activity gradually decays, and the service life of the catalyst is low, and some catalysts exist only under the condition of high alcohol-phenol ratio. In order to obtain better anisole selectivity and higher phenol conversion rate, etc., it will inevitably lead to a sharp increase in energy consumption, an increase in production cost, and it is difficult to have market competitiveness; at the same time, the preparation process of some catalysts is complicated and the conditions are harsh, resulting in The high cost of the catalyst also limits its industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Add 100g of zinc phosphate to 200g of deionized water, add 1g of cerium nitrate, stir at room temperature for 6h, age and dry at 90°C for 12h, put it in a muffle furnace and roast at 450°C for 6h, and cool down to room temperature to make a catalyst intermediate .

[0020] 2. Add 100g of the catalyst intermediate to 200g of deionized water, and add 0.1g of sodium fluoride, stir at room temperature for 4h, age and dry at 100°C for 12h, and roast at 450°C for 8h to prepare the catalyst.

[0021] 3. The obtained catalyst is granulated and formed into cylindrical particles with a diameter of 4 mm and a height of 4 mm, and then packed into a fixed bed reactor with a catalyst loading capacity of 30 mL, a reaction tube with an inner diameter of 28 mm, and a material of 316L stainless steel; phenol and methanol After preheating, the molar ratio is 1:3 and it passes through the fixed bed reactor continuously. Under the reaction conditions of reaction temperature 300°C, reacti...

Embodiment 2

[0023] 1. Add 100g of ferric phosphate to 300g of deionized water, add 2g of zirconium nitrate, stir at room temperature for 6h, age and dry at 90°C for 12h, put it in a muffle furnace and roast at 500°C for 4h, and cool down to room temperature to make a catalyst intermediate .

[0024] 2. Add 100g of the catalyst intermediate to 300g of deionized water and 0.4g of cesium fluoride, stir at room temperature for 4h, age and dry at 100°C for 12h, and roast at 500°C for 5h to prepare the catalyst.

[0025] 3. This step is the same as Step 3 of Example 1, and the results of the 200h reaction are shown in Table 1.

Embodiment 3

[0027] 1. Add 100g of copper phosphate to 500g of deionized water, add 5g of lanthanum nitrate, stir at room temperature for 6h, age and dry at 90°C for 12h, put it in a muffle furnace and roast at 600°C for 3h, and cool down to room temperature to make a catalyst intermediate .

[0028] 2. Add 100g of the catalyst intermediate to 500g of deionized water and 1g of potassium fluoride, stir at room temperature for 4h, age and dry at 100°C for 12h, and roast at 600°C for 4h to prepare the catalyst.

[0029] 3. This step is the same as Step 3 of Example 1, and the results of the 200h reaction are shown in Table 1.

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PUM

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Abstract

The invention discloses a method for producing anisole by catalyzing phenol and methanol. According to the method, a fixed bed reactor is adopted, carriers such as zinc phosphate, iron phosphate, copper phosphate and chromium phosphate load modified components such as cerium nitrate, zirconium nitrate, lanthanum nitrate, cobalt nitrate and nickel nitrate and assistants such as potassium fluoride,cesium fluoride and sodium fluoride to serve as a catalyst, the anisole is efficiently synthetized, the phenol conversion rate and anisole selectivity are high, and the catalyst is simple in preparation process, low in cost, high in stability and long in service life, and meets the application requirements of industrial catalysts.

Description

technical field [0001] The invention belongs to the technical field of anisole preparation, in particular to a method for producing anisole by catalyzing phenol and methanol. Background technique [0002] Anisole, also known as anisole, anisole, and methoxybenzene, is an important chemical raw material. Because of its special fragrance, it can be used as an additive to soaps and detergents; Used as an intermediate in insecticides; due to its large dielectric constant and high boiling point, it can be used as an excellent general reagent, initiator, solvent, thermostat filler, etc., and it can also be used as a substitute for gasoline additives because it can increase the octane number of gasoline MTBE can also be used as solvent, synthetic resin and fuel additive in printing industry and paint industry. In recent years, the market demand for anisole has increased dramatically. [0003] The synthetic method of anisole mainly contains dimethyl sulfate method, dimethyl carbon...

Claims

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Application Information

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IPC IPC(8): C07C41/09C07C43/205B01J27/188B01J27/185B01J27/18
Inventor 王伟杨朋飞赵亚婷张峰
Owner BAOJI UNIV OF ARTS & SCI
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