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Modification method of catalyst carrier for producing ethylene glycol through hydrogenation of oxalate, and catalyst and applications thereof

A technology of catalyst carrier and oxalate, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Solve the problems of large differences in silicon chemical properties, etc., and achieve the effects of easy-to-obtain raw materials, simple and low preparation process and production cost, high ethylene glycol selectivity and stability

Inactive Publication Date: 2018-10-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, due to its complex preparation process and many factors affecting the properties of the product, the chemical properties of fumed silica are quite different, especially its surface groups are numerous, contain a large number of polar groups, and the differences are large, which are all Limit its application as a catalyst support

Method used

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  • Modification method of catalyst carrier for producing ethylene glycol through hydrogenation of oxalate, and catalyst and applications thereof
  • Modification method of catalyst carrier for producing ethylene glycol through hydrogenation of oxalate, and catalyst and applications thereof
  • Modification method of catalyst carrier for producing ethylene glycol through hydrogenation of oxalate, and catalyst and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Fumed silica modification:

[0021] Weigh two samples of 6g of fumed silica, dissolve them in 600mL of NaCl solution with a mass concentration of 20%, and stir thoroughly; then, adjust the pH of the solution to 4.0 with hydrochloric acid with a mass concentration of 5%; then, adjust the concentration 25ml and 50ml of 0.1mol / L NaOH solution were added to the above two solutions and mixed thoroughly for 30min; finally, the above suspension was filtered and washed until the filtrate was neutral, then dried at 120°C, respectively Marked as SiO 2 -A and SiO 2 -B.

Embodiment 2

[0023] Cu(NO 3 ) 2 Prepare a 0.3mol / L aqueous solution, measure 157ml of the solution and place it in a beaker, slowly add ammonia water dropwise while stirring, and stop when the pH of the solution in the beaker is 9.5-10.5. Take by weighing the modified fumed silica SiO in 4g embodiment 1 2 -A, add the above cuproammonia solution into the beaker, stir and age in a water bath at 30°C for 4 hours, then heat up to 90°C to distill ammonia until the pH value of the solution in the beaker is 7-8 and stop. The resulting precipitate was filtered, washed until the pH of the filtrate was about 7, and stopped. The washed precipitate was dried at 120°C for 12h, calcined at 450°C for 4h, pressed and crushed to 20-40 mesh, and reduced before reaction to obtain catalyst A: 20wt% Cu / SiO 2 .

Embodiment 3

[0025] The preparation steps are the same as in Example 2, and the modified fumed silica SiO in 4g of Example 1 is weighed. 2 -B. Prepared Catalyst B: 20wt% Cu / SiO 2 .

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Abstract

The invention relates to a modification method of a catalyst carrier for producing ethylene glycol through hydrogenation of oxalate, and a catalyst and applications thereof. A purpose of the present invention is mainly to solve the problems of low selectivity of the hydrogenation product ethylene glycol, short service life of the catalyst, high requirement on the catalyst carrier and high cost inthe prior art. According to the present invention, the catalyst uses metal copper as the active component and uses fumed silica as the carrier, and the catalyst carrier is modified by adding a certainamount of the alkaline solution, wherein the modified catalyst carrier has high selectivity and high stability.

Description

technical field [0001] The invention relates to a catalyst carrier modification method for hydrogenating oxalate to ethylene glycol, in particular to a catalyst carrier modification method for hydrogenating dimethyl oxalate and diethyl oxalate to prepare ethylene glycol. Background technique [0002] my country has a strong demand for polyester products, and ethylene glycol is the main raw material of the polyester industry, which makes my country the largest consumer of EG. However, the main production process of ethylene glycol is the ethylene oxide hydration method, which relies on petroleum resources. In my country's energy structure, coal is relatively abundant, which makes synthesis gas easier to obtain and lower in cost. Therefore, the preparation of ethylene glycol from synthesis gas has attracted more and more attention of scientific researchers in recent years. The method starts with oxidative coupling of CO to generate oxalate, which is further catalytically hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C29/149C07C31/20
CPCC07C29/149B01J23/72B01J35/394B01J35/613C07C31/202Y02P20/52
Inventor 马俊国葛庆杰孙剑徐恒泳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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