Catalyst special for O-alkylation production of aromatic ether and method for producing aromatic ether

A technology of aromatic ethers and catalysts, applied in the field of catalysts and the production of aromatic ethers using the catalysts, can solve the problems of continuous industrial production of aromatic ethers and short catalyst life, and achieve the effects of high conversion rate, long catalyst life and low toxicity

Active Publication Date: 2016-12-14
张旻捷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a special catalyst for the production of aromatic ether by O-alkylation and a method for producing aromatic ether, so as to solve the problem that the catalyst used in the existing aromatic ether production process has a short service life, which leads to the problem that the continuous industrial production of aromatic ether cannot be realized

Method used

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  • Catalyst special for O-alkylation production of aromatic ether and method for producing aromatic ether
  • Catalyst special for O-alkylation production of aromatic ether and method for producing aromatic ether
  • Catalyst special for O-alkylation production of aromatic ether and method for producing aromatic ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of a special catalyst for the production of aromatic ethers by O-alkylation.

[0022] Preparation of shaped support: 35g SiO 2 Mix evenly with 15g of pseudo-boehmite, then add 2% kale powder and mix, then add a nitric acid solution with a concentration of 8wt% after mixing evenly, after mixing evenly, extrude into strips; then dry at 120°C, and then Calcined at 540°C to obtain a catalyst-shaped carrier.

[0023] Impregnation of active components: prepare copper nitrate aqueous solution, the amount of copper nitrate is controlled in the catalyst active metal-copper content is 1.5% (wt.), then take 50g catalyst shaped carrier and join in the copper nitrate solution, at a constant temperature of 30 ℃ Immerse in a water bath for 12 hours; then dry at 120°C for 8 hours, and then roast at 550°C for 6 hours to obtain a semi-finished catalyst.

[0024] The impregnation of auxiliary agent component: the mixed solution of preparation ammonium phosphate an...

Embodiment 2～5

[0026] Examples 2-5: Preparation of special catalysts for producing aromatic ethers by O-alkylation.

[0027] The difference with Example 1 is that the carrier used is different, the carrier used in Example 2 is mercerized molecular sieve, the carrier used in Example 3 is aluminum phosphate, and the carrier used in Example 4 is SiO 2 and the mixture of mercerized molecular sieves, the carrier used in embodiment 5 is SiO 2 and aluminum phosphate mixture.

[0028] The catalysts prepared in Examples 1-5 were tested, and the results are shown in Table 1 and Table 2.

[0029] Table 1 is by catalyzing phenol and methyl alcohol, phenol and ethanol reaction to the evaluation result of embodiment 1~5 catalyst

[0030]

[0031] Table 2 by catalyzing catechol and methanol, catechol and ethanol reaction to the evaluation result of embodiment 1~5 catalyst

[0032]

[0033]

Embodiment 6～10

[0034] Examples 6-10: Preparation of special catalysts for producing aromatic ethers by O-alkylation.

[0035] The difference from Example 1 is that the loading of active components is different. The loading of active components in Example 6 is 0.1%, the loading of active components in Example 7 is 1.0%, and the loading of active components in Example 8 is 1.0%. The loading amount was 2.0%, the loading amount of the active ingredient in Example 9 was 3.0%, and the loading amount of the active ingredient in Example 10 was 5.0%.

[0036] The catalysts prepared in Examples 6-10 were tested and compared with Example 1, the results are shown in Table 3 and Table 4.

[0037] Table 3 is by catalyzing phenol and methanol, phenol and ethanol reaction to the evaluation result of embodiment 6~10 catalyst

[0038]

[0039]

[0040] Table 4 by catalyzing the reaction of catechol and methanol, catechol and ethanol to the evaluation result of the catalyst prepared in Examples 6-10

...

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Abstract

The invention provides a catalyst special for O-alkylation production of aromatic ether and a method for producing aromatic ether. The catalyst is a supported catalyst, wherein transition metal or precious metal serves as an active component, a mixture of any one of ammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium phosphate and phosphoric acid and any one of potassium hydroxide, potassium carbonate, sodium hydroxide and sodium carbonate serves as an auxiliary, one or a mixture of an oxide carrier, clay and a molecular sieve serves as a carrier, the weight carrying amount of the active component is 0.1-5%, and the weight carrying amount of the auxiliary is 0.1-1%. The method comprises the steps that phenol and alkyl alcohol are catalyzed to react through the catalyst, wherein the mole ratio of phenol to alkyl alcohol in the raw materials is 1:(3-10), the catalyzing reaction is carried out in a gas-solid phase continuous flowing reaction device, and the catalyzing reaction temperature is 230-300 DEG C. The one-way service life of the catalyst reaches 3000 h or longer, and the problems that a catalyst used in the existing aromatic ether production process is short in service life, and consequently continuous industrial production of aromatic ether cannot be achieved are solved.

Description

technical field [0001] The invention relates to a catalyst and a method for producing aromatic ethers using the catalyst, in particular to a special catalyst for producing aromatic ethers by O-alkylation and a method for producing aromatic ethers. Background technique [0002] Aromatic ethers are a large class of very important fine chemical intermediates, and are important synthetic raw materials for spices, fuels, medicines and pesticides. For example, anisole and phenetole are widely used in the synthesis of spices and flavoring agents, and o-hydroxyanisole and o-hydroxyphenetole are mainly used in the production of vanillin and ethyl vanillin. [0003] At present, the production of aromatic ethers usually adopts the gas-solid phase fixed-bed method, and there are many research reports on this aspect. Chen Bing et al. used dimethyl carbonate as the methylating reagent and used SiO 2 The loaded potassium salt catalyst reacts at 250°C to prepare anisole, the yield of anis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/182B01J27/18B01J29/03B01J29/04B01J27/185C07C41/09C07C43/23
CPCB01J27/1817B01J27/182B01J27/1853B01J27/1856B01J29/0325B01J29/0333B01J29/0354B01J29/0356B01J29/043B01J29/044B01J2229/186C07C41/09C07C43/23
Inventor 张旻捷
Owner 张旻捷
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