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Catalyst for hydrogenation of ethylene carbonate, preparation method and application

A technology of ethylene carbonate and catalyst, which is applied in the field of catalyst for hydrogenation of ethylene carbonate and its preparation field, can solve the problems of not too long service life and large amount of catalyst, and achieves high product selectivity, good low temperature reaction activity and high product selective effect

Active Publication Date: 2020-01-07
ZHEJIANG HUANHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On Cu / SiO 2 The selectivity of methanol on the catalyst can reach 95%, but the amount of catalyst used is too large and the lifetime is not too long (Green.Chem.2015, 17, 4281-4290)

Method used

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  • Catalyst for hydrogenation of ethylene carbonate, preparation method and application
  • Catalyst for hydrogenation of ethylene carbonate, preparation method and application
  • Catalyst for hydrogenation of ethylene carbonate, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 10.2 g of Cu(NO 3 ) 2 ·3H 2 O, 1.1 g Zr(NO 3 ) 4 ·5H 2 O and 1.4 g Mg(NO 3 ) 2 ·6H 2 O(x Cu :y Al :z Mg =17:1:2.1) Prepare a mixed solution with deionized water, and transfer it into a round-bottomed flask containing 2 grams of silicon oxide (to make the metal loading 60wt.%). Na 2 C0 3 The aqueous solution and the metal mixed solution are co-precipitated in a water bath at 75°C and continuously stirred, and the pH value of the titration end point is controlled to be 7-8, and the metal ions are co-precipitated into a solid; finally, the solid is dried at 120°C for 10 hours. Roast at 450°C for 5 hours, then impregnate 1% boric acid of the solid mass after roasting by impregnation method, denoted as Cu 17 -Zr 1 -Mg 2.1 / SiO 2-B, to obtain catalyst A, and the catalyst and its composition are shown in Table 1.

[0030] Catalyst reduction and ethylene carbonate hydrogenation:

[0031] Get 1 gram of catalyst A and pack it into a fixed-bed stainless steel rea...

Embodiment 2

[0035] Control the molar ratio of the three metals to be x Cu :y Zr :z Mg The catalyst was prepared under the condition of =17:1:2.1, and other specific operations were the same as in Example 1 except that boric acid was not impregnated.

[0036] The conditions of catalyst reduction and ethylene carbonate hydrogenation are the same as in Example 1, and the reaction results are shown in Table 1.

Embodiment 3

[0038] Control the molar ratio of the three metals to be x Cu :y Zr :z Mg Prepare catalyst under the condition of =17:1:2.4, concrete method is with embodiment 2. The conditions of catalyst reduction and ethylene carbonate hydrogenation are the same as in Example 1, and the reaction results are shown in Table 1.

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Abstract

The invention discloses a catalyst for hydrogenation of ethylene carbonate, and a preparation method and application thereof. The general chemical formula of the catalyst is Cu<x>-Zr<y>-M<z> / SiO<2>-B,wherein M is Mg, Zn, Al, K, Ce, Mn or Co; a ratio of x to y to z is (5-18): (1-2.6): (1.5-3); and the ratio of x to y to z is the mole ratio of metal substances. The general chemical formula comprises the following starting raw materials: a soluble salt of Cu, a soluble salt of Zr and a soluble salt of M. According to the catalyst in the invention, copper is used as an active component, and zirconium and a series of ternary metals are used as auxiliary agents; when the catalyst is used for used for catalytic hydrogenation of ethylene carbonate, the catalyst has the advantages of good low-temperature reactivity, high product selectivity, good stability, etc.; and the selectivity of methanol can reach 90% or above when the conversion rate of ethylene carbonate is 99%.

Description

technical field [0001] The invention relates to the field of preparation and application of chemical catalytic materials containing multiple metals or composite oxides, in particular to a catalyst for hydrogenation of ethylene carbonate and its preparation method and application. Background technique [0002] With the increasing climate problems caused by the greenhouse effect, CO 2 The transformation and utilization of the technology has attracted more and more attention from scholars from all over the world. will CO 2 The conversion into methanol, a very important chemical raw material, is a very important chemical process. Although the current 2 There are many studies on the direct hydrogenation of methanol, but harsh conditions are usually required to obtain high activity and selectivity. At present, almost all industries use synthesis gas (CO+CO 2 ) pressurized catalytic hydrogenation to synthesize methanol, the catalyst used is basically a copper-based catalyst, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J23/80B01J37/03B01J37/08B01J37/02B01J37/18C07C31/20C07C31/04C07C29/149
CPCB01J23/78B01J23/80B01J37/0201B01J37/031B01J37/086B01J37/18C07C29/149C07C31/202C07C31/04Y02P20/52
Inventor 李晓红田景霞吴鹏
Owner ZHEJIANG HUANHUA TECH CO LTD
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