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Method of improving performance of methylal carbonylation reaction catalyst

A carbonylation reaction and methylal technology, which is applied in the field of improving the performance of methylal carbonylation reaction catalysts, can solve the problems of many process units and high purity requirements of industrial gases, and achieve easy separation, high activity and selectivity, and long life. Enhanced effect

Active Publication Date: 2016-05-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many process units, and the purity of industrial gases is high. In the oxidative coupling process, noble metal catalysts need to be used, and nitrogen oxides that are potentially polluting the environment need to be used, which will restrict the economy, environmental protection, energy saving and further engineering scale-up of the process.

Method used

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  • Method of improving performance of methylal carbonylation reaction catalyst
  • Method of improving performance of methylal carbonylation reaction catalyst

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Effect test

Embodiment 1

[0059] When the catalyst in Comparative Example 1 was activated by nitrogen and dropped to the reaction temperature, the pre-adsorbent 1# was methyl methoxyacetate and nitrogen. Pre-adsorption conditions: the flow rate of methyl methoxyacetate is 0.04ml / min (standard state volume flow rate, the same below), the nitrogen flow rate is 100ml / min, it is saturated after 90 minutes of adsorption, then stop feeding pre-adsorbent 1#, and start at the same time The reaction raw materials were introduced, and the remaining experimental steps and reaction conditions were consistent with Comparative Example 1. The reaction results are shown in Table 1.

Embodiment 2

[0063] When the catalyst in Comparative Example 2 was activated by nitrogen and dropped to the reaction temperature, the pre-adsorbent 2# was methyl methoxyacetate and carbon monoxide. Pre-adsorption conditions: the flow rate of methyl methoxyacetate is 0.08ml / min, the flow rate of carbon monoxide is 150ml / min, saturated after 60 minutes of adsorption, then stop feeding pre-adsorbent 2#, and start feeding the reaction raw materials at the same time, the rest of the experimental steps are the same as The reaction conditions were consistent with Comparative Example 2, and the reaction results are shown in Table 1.

Embodiment 3

[0067] When the catalyst in Comparative Example 3 was activated by nitrogen and dropped to the reaction temperature, pre-adsorbent 3# methyl methoxyacetate and hydrogen. Pre-adsorption conditions: the flow rate of methyl methoxyacetate is 0.06ml / min, the flow rate of hydrogen gas is 120ml / min, it is saturated after 100 minutes of adsorption, then stop feeding pre-adsorbent 3#, and start feeding the reaction raw materials at the same time, the rest of the experimental steps are the same as The reaction conditions were consistent with Comparative Example 3, and the reaction results are shown in Table 1.

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Abstract

The application relates to a method of improving performance of a methylal carbonylation reaction catalyst. The method comprises the following steps: pre-adsorbing an acidic molecular sieve catalyst through methyl methoxyacetate; and performing a reaction to a raw material, methylal, with CO and H2 through a reactor carrying the acidic molecular sieve catalyst under a proper reaction condition. The catalyst has long service life, is high in conversion rate of the methylal, is high in selectivity on the product, methyl methoxyacetate, and is free of any additional solvent. The method employs mild reaction conditions, allows continuous product and has industrial application potential. The product can be hydrolyzed through hydrogenation or hydrolyzed and then hydrogenated to produce ethylene glycol.

Description

technical field [0001] The application belongs to the field of chemistry and chemical engineering, and in particular relates to a method for improving the performance of a methylal carbonylation reaction catalyst. Background technique [0002] Ethylene glycol is an important chemical raw material and strategic material in the country. It is used in the manufacture of polyester (which can further produce polyester, PET bottles, films), explosives, glyoxal, and can be used as antifreeze, plasticizer, hydraulic fluid and solvent Wait. In 2009, China's ethylene glycol imports exceeded 5.8 million tons. It is estimated that my country's ethylene glycol demand will reach 11.2 million tons in 2015, with a production capacity of about 5 million tons, and a supply-demand gap of 6.2 million tons. Therefore, my country's ethylene glycol production The development and application of new technologies has a good market prospect. Internationally, ethylene oxide from petroleum cracking is ...

Claims

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Application Information

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IPC IPC(8): C07C67/36C07C69/708
Inventor 倪友明朱文良刘红超刘勇刘中民李利娜刘世平周慧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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