Sulfur-tolerant pre-shift catalyst and preparation method thereof

A catalyst and pre-conversion technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem of low activity, achieve low cost, reduce preparation cost, stable structure and activity good sex effect

Active Publication Date: 2021-08-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FCC waste agent is mainly composed of Al 2 o 3 , SiO 2 , clay and BaCO 3 It is prepared by mixing. This type of waste agent has low activity and contains a certain amount of heavy metals. How to deal with it has always been one of the topics that people in the industry pay attention to.
At present, a more effective method is to recycle part of the waste agent to reduce the amount of disposal. The methods mainly include recycling through magnetic separation technology, using it as a cement substitute material, as a flame retardant and microbial growth inhibitor, and recycling. crystallization into catalysts, etc., but there are few related studies and reports on the field of cobalt-molybdenum-based sulfur-tolerant shift catalysts

Method used

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  • Sulfur-tolerant pre-shift catalyst and preparation method thereof
  • Sulfur-tolerant pre-shift catalyst and preparation method thereof
  • Sulfur-tolerant pre-shift catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 7.8g of cobalt nitrate and 9.8g of ammonium molybdate, add 40ml of ammonia water and 1ml of ethylenediamine, and heat to 60°C to obtain clear solution A. Add 3g of oxalic acid and 1ml of dilute nitric acid to 15ml of deionized water respectively to obtain solution B.

[0046] First roast the waste FCC agent at 600°C for 6 hours, crush it, pass through a 180-mesh sieve, then take 72g of the waste FCC agent, mix it with 18g kapinestone and 4g Tianqing powder, add solution A, and knead evenly; then add solution B, knead evenly , after molding, air-dried, and then calcined at 480°C for 3 hours, the finished catalyst C-1 was obtained.

Embodiment 2

[0048] Weigh 11.7g of cobalt nitrate and 8.6g of ammonium molybdate, add 50ml of ammonia water and 2ml of ethylenediamine, and heat to 70°C to obtain clear solution A. Add 3g of citric acid and 2ml of acetic acid to 20ml of deionized water respectively to obtain solution B.

[0049] The waste FCC agent was roasted at 500°C for 10 hours, pulverized, and passed through a 200-mesh sieve. Then, 63g of the waste FCC agent was mixed with 27g of kanestone and 5g of starch. Add solution A and knead evenly; then add solution B, knead evenly, Shaping, drying at 60°C for 3 hours, and then calcination at 550°C for 3 hours to obtain the finished catalyst C-2.

Embodiment 3

[0051] Weigh 3.9g of cobalt nitrate and 4.9g of ammonium molybdate, add 30ml of ammonia water and 1ml of ethylenediamine, and heat to 50°C to obtain clear solution A. Add 3g of oxalic acid and 2g of citric acid to 25ml of deionized water respectively to obtain solution B.

[0052] The waste FCC agent is roasted at 700°C for 2 hours, crushed and passed through a 210-mesh sieve, and then 59g of the waste FCC agent is mixed with 36g of kanestone and 2g of Tianqing powder, and then added to solution A and kneaded evenly; then added to solution B and kneaded evenly , after molding, drying at 60°C for 3 hours, and then calcining at 400°C for 3 hours, the finished catalyst C-3 was obtained.

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Abstract

The invention relates to a sulfur-resistant pre-shift catalyst and a preparation method thereof. The catalyst uses group VIB metal elements and group VIII metal elements as active components, alkali metals as active promoters, and the carrier is composed of oxides of Al, Si and Ba. Among them, Al, Si and Ba oxides come from FCC waste; among them, the aluminum sources all come from processed FCC waste. The invention reduces the production cost of the shift catalyst, and the shift catalyst has high strength, good structure and activity stability; finds a more effective treatment and utilization way for the FCC waste agent with wide sources and low cost, and alleviates the problem of FCC waste agent The huge pressure caused by the ecological environment has good economic and environmental benefits.

Description

technical field [0001] The invention relates to a sulfur-resistant pre-shift catalyst and a preparation method thereof. Background technique [0002] The cobalt-molybdenum-based sulfur-resistant wide-temperature shift catalyst is mainly used to meet the needs of producing raw material gas from heavy raw materials such as heavy oil, residual oil, and coal. It has a lower activation temperature than iron-based high-temperature shift catalysts and is comparable to copper-based low-temperature shift catalysts. , and its heat resistance is not lower than that of iron-chromium-based high-temperature shift catalysts, and has a wide active temperature range, covering almost the entire active temperature range of iron-based high-temperature shift catalysts and copper-based low-temperature shift catalysts. In addition, its most prominent advantages are strong sulfur and poison resistance, high strength, and long service life. There are many studies on the support and additives of sul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887C01B3/16
CPCB01J23/002B01J23/8872B01J2523/00C01B3/16C01B2203/0283C01B2203/1082B01J2523/31B01J2523/41B01J2523/25B01J2523/68B01J2523/845Y02P20/52
Inventor 白志敏余汉涛田兆明赵庆鲁陈依屏齐焕东王昊姜建波薛红霞李文柱
Owner CHINA PETROLEUM & CHEM CORP
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