Hydrogenation catalyst and preparation method therefor

A technology of catalysts and additives, which is applied in the field of high activity and stability supported iron-based syngas to low-carbon olefin catalysts and its preparation, and can solve the problems of low-carbon olefin catalyst activity and stability to be further improved, high catalyst cost, and CO conversion. Low efficiency and other problems, to achieve the effect of outstanding comprehensive performance, improved conversion rate, and improved selectivity

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN1065026A discloses a method for producing ethylene from synthesis gas, which involves the preparation of catalysts by chemical precipitation and mechanical mixing, using precious metals or rare metals, such as niobium, gallium, praseodymium, scandium, indium, cerium, lanthanum, ytterbium, etc. For other chemical elements, the selectivity of ethylene is 65%-94%, but the conversion rate of CO is very low, only about 10%, 12% and 15%. The recycling of CO will inevitably lead to energy consumption, and the catalyst cost is high
However, the activity stability of the long-term operation of the above-mentioned Fe-based silica gel-supported synthesis gas to directly prepare low-carbon olefins catalysts still needs to be further improved.

Method used

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  • Hydrogenation catalyst and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh commercially available spherical alumina (pore volume is 0.96ml / g, specific surface area is 286.81m 2 / g, saturated water absorption is 145ml / g, provided by Sinopec Catalyst Co., Ltd. Fushun branch, the following examples and comparative examples all use the alumina), the sucrose mass concentration is 5% aqueous solution with sulfuric acid to adjust the pH value equal to 3. Immediately after the saturated spraying and impregnating alumina, dry at 95°C for 1 hour, the adsorption amount of the acidic solution for drying sugar is 60% of the saturated absorption solution of the alumina carrier, aging at 60°C for 7 hours, and drying at 100°C 24 hours, and then calcined at 300° C. for 5 hours to obtain a modified alumina carrier. The above-mentioned modified alumina carrier was impregnated with an aqueous zinc nitrate solution with a mass fraction of 5% by unsaturated spray impregnation method, the immersion temperature was 50°C, the immersion time was 3h, the impregnati...

example 2

[0028] Weigh commercially available alumina, adjust the pH value of the aqueous solution with a sucrose mass concentration of 20% to 1 with sulfuric acid, and immediately dry at 110°C for 0.5h after saturated spraying and impregnating the alumina to reach the adsorption capacity of the acidic solution of sugar. It is 40% of the saturated absorption solution of the alumina support, aged at 80°C for 4 hours, dried at 120°C for 8 hours, and then calcined at 400°C for 3 hours to obtain a modified alumina support. The above-mentioned modified alumina carrier is impregnated with an aqueous solution of zinc sulfate with a mass fraction of 10% by an unsaturated impregnation method. Dry for 10h, then bake at 900°C for 4h. The unsaturated carrier after roasting is sprayed and dipped in morphine aqueous solution, the spray volume of morphine aqueous solution is 10% of the total saturated water absorption of the carrier used, the mass content of morphine in the morphine aqueous solution i...

example 3

[0030] Except that 5% ammonium citrate was added to the impregnated ferric nitrate aqueous solution, the rest was the same as in Example 1, and the prepared catalyst was denoted as C-3, and the 300h evaluation results were shown in Table 1.

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Abstract

The invention discloses a hydrogenation catalyst and a preparation method therefor. The preparation method for the hydrogenation catalyst comprises following steps: (1) impregnating an alumina carrier into sugar acidic solution by using incipient-wetness impregnation method; drying to make the adsorption quantity of the sugar acidic solution is 30-60% of the saturated absorption solution quantity of the alumina carrier; (2) impregnating the modified alumina carrier preparing by step (1) into zinc salt solution by using unsaturated impregnation method; (3) impregnating the roasted carrier in step (2) into fountain solution containing an adsorbent by using unsaturated impregnation method; (4) impregnating the carrier containing the adsorbent in step (3) into the solution containing active metal iron; impregnating the carrier into metal auxiliary agent after drying and roasting; and getting the catalyst preparing low carbon olefin by synthetic gas after drying and roasting. The catalyst has high activity and stability in long-time running, and facilitates industrial application and popularization.

Description

technical field [0001] The invention relates to a catalyst for producing olefins from synthesis gas and a preparation method thereof, in particular to a high-activity and stability loaded iron-based catalyst for producing low-carbon olefins from synthesis gas and a preparation method thereof. Background technique [0002] Low-carbon olefins such as ethylene and propylene are important basic organic chemical raw materials. With the development of the chemical industry, their demand is increasing. So far, the way to produce low-carbon olefins such as ethylene and propylene is mainly through the cracking process of light oil. With the increasing depletion of petroleum resources worldwide, the future energy structure will inevitably shift. Compared with oil resources, coal and natural gas resources are relatively abundant, and it is of great significance to develop low-carbon olefin production processes based on coal and natural gas. The development of direct production of ethy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C11/04C07C11/06C07C11/08C07C1/04
CPCY02P20/52
Inventor 王诗语李杰张舒冬张信伟孙晓丹尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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