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Catalyst for preparing acetone from acetic acid and its synthesis method and application

A catalyst, acetic acid technology, applied in chemical instruments and methods, organic chemistry, carbon-based compound preparation and other directions, can solve the problem of high cost, achieve the effect of low cost, small separation load, and easy industrial application

Active Publication Date: 2016-01-20
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, ZrO 2 As a catalyst carrier, its cost is undoubtedly high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 3.2gSiO2 2 , 6.8g of high-purity calcium aluminate cement (the manufacturer is "Kaifeng Hecheng Special Refractories Co., Ltd.", the specification model is high-purity CA-75, and the high-purity calcium aluminate adopted in the following examples without special instructions is this model ), after being pulverized and mixed, ball milled for 6 hours, the sample was formed by extrusion, and the obtained strip carrier was roasted at 300°C for 5 hours, and the mass fraction of the obtained composite was SiO 2 =32%, cement=68%.

[0027] Weigh 0.37gZr(NO 3 ) 4 ·5H 2 O, made into an aqueous solution, using the above-mentioned compound as a carrier, prepared by an equal volume impregnation method, dried at 100°C for 24h, and calcined at 350°C for 6h to obtain a catalyst composed of ZrO 2 =2.12%, carrier=97.88%. The obtained catalyst was loaded into the reactor, and the temperature was directly raised to 280°C, and the -1 Under the conditions, the conversion rate of ...

Embodiment 2

[0029] Weigh 5.8gSiO2 2 , 4.2g cement, crushed and mixed, ball milled for 10h, the sample was formed by pelleting, the obtained columnar carrier was roasted at 500°C for 3h, and the mass fraction of the obtained composite was SiO 2 =58%, cement=42%.

[0030] Weigh 1.6gLa(NO 3 ) 3 ·6H 2 O, made into an aqueous solution, using the above-mentioned compound as a carrier, prepared by an equal volume impregnation method, dried at 110°C for 15 hours, and calcined at 420°C for 5 hours to obtain a catalyst composed of La 2 o 3 =6.02%, carrier=93.98%. The obtained catalyst was loaded into the reactor, and the temperature was directly raised to 340°C, and the reaction pressure was 0.1MPa, and the mass space velocity was 2.0h. -1 Under the conditions, the conversion rate of acetic acid is 80.2%, and the selectivity of acetone is 99.1%.

Embodiment 3

[0032] Weigh 4.5gSiO 2, 5.5g of cement, crushed and mixed, ball milled for 8h, the sample was formed by pelletizing, the obtained columnar carrier was roasted at 400°C for 4h, and the mass fraction of the obtained composite was SiO 2 =45%, cement=55%.

[0033] Weigh 2.5gCe(NO 3 ) 3 ·6H 2 O, made into an aqueous solution, using the above-mentioned compound as a carrier, prepared by an equal volume impregnation method, dried at 120°C for 12 hours, and calcined at 500°C for 3 hours to obtain a catalyst composed of CeO 2 =9.91%, carrier=90.09%. The obtained catalyst was loaded into the reactor, and the temperature was directly raised to 400°C, and the -1 Under the conditions, the conversion rate of acetic acid is 85.2%, and the selectivity of acetone is 98.2%.

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Abstract

The invention discloses a catalyst used for preparing acetone through acetic acid. The catalyst comprises the following components by weight: 90%-98% of a carrier and 2%-10% of an active component, wherein the carrier is the compound of SiO2 and high purity calcium aluminium cement; the mass fraction of the SiO2 is 30%-60% and the mass fraction of the high purity calcium aluminium cement is 40%-70%; the active component is one among ZrO2, La2O3 and CeO2. According to the invention, the catalyst has the following advantages: the preparation process is simple and controllable, and the catalyst is good in selectivity, high in activity, low in cost and mild in reacting technology condition.

Description

technical field [0001] The invention belongs to a catalyst and its synthesis method and application, in particular to a catalyst for producing acetone from acetic acid, its synthesis method and application. technical background [0002] Acetic acid is an important chemical reagent used in the manufacture of polyethylene terephthalate, cellulose acetate and as an acidity regulator in the food industry. However, with the continuous expansion of acetic acid production capacity, it is expected that the total domestic production capacity will exceed 10 million tons per year by 2015. It can be seen that there will be a serious surplus of acetic acid, leading to a continuous downturn in the acetic acid industry. In view of this, the development of downstream products of acetic acid has important practical significance. [0003] Acetone is an important raw material for organic synthesis. It can be used to synthesize epoxy resin, plexiglass, medicine and pesticide. It is also a high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/02B01J23/10C07C45/54C07C49/08
Inventor 高志贤庆绍军侯晓宁郗宏娟刘雅杰苏化东李林东赵金珍
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI