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Preparation method of low-temperature FCC gasoline dearsenification agent

A gasoline and arsenic removal technology, applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve problems such as high pressure, clogged equipment, and catalyst deactivation

Active Publication Date: 2020-10-30
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since FCC gasoline and other light oil products contain a large amount of unsaturated hydrocarbons, the temperature and pressure of hydrogen dearsenization are relatively high. During the reaction process, not only the octane number of gasoline is reduced, but also a series of Side reactions, such as coking to block equipment, deactivate catalysts, etc.

Method used

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  • Preparation method of low-temperature FCC gasoline dearsenification agent
  • Preparation method of low-temperature FCC gasoline dearsenification agent
  • Preparation method of low-temperature FCC gasoline dearsenification agent

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 50g of manganese nitrate and dissolve it completely in water, 150g of 30% sodium silicate solution, respectively use a peristaltic pump to drop the manganese nitrate solution and sodium silicate solution into 100ml of deionized water at the same time, and start stirring at the same time to make the dripping solution Mix well and produce a precipitate. After the solution was completely precipitated, it was stirred and aged at 50°C for 6h. The precipitate was filtered, washed three times with deionized water, and the precipitate was calcined in a muffle furnace at 350° C. for 12 hours to obtain a manganese silicate dearsenic agent precursor. The manganese silicate catalyst is added into an appropriate amount of binder, kneaded and extruded to obtain the manganese silicate arsenic removal agent Cat-1.

Embodiment 2

[0026] Weigh 50 grams of manganese acetate and dissolve it completely in water, 150 g of 30% sodium silicate solution, respectively use a peristaltic pump to drop the manganese acetate solution and the sodium silicate solution into 100 ml of deionized water at the same time, start stirring, and make the dripping solution Mix well and produce a precipitate. After the solution was completely precipitated, it was stirred and aged at 50°C for 6 hours. The precipitate was filtered, washed three times with deionized water, and the precipitate was calcined in a muffle furnace at 350° C. for 12 hours to obtain a manganese silicate dearsenic agent precursor. The manganese silicate catalyst is added into an appropriate amount of binder, kneaded and extruded to obtain the manganese silicate arsenic removal agent Cat-2.

Embodiment 3

[0028] Take by weighing 50 grams of manganese chloride and be completely dissolved in water, 150 g of 30% sodium silicate solution, utilize peristaltic pump respectively that manganese chloride solution and sodium silicate solution are dripped into the deionized water of 100ml simultaneously, start stirring simultaneously, make The dripping solution was mixed uniformly and precipitated. After the solution was completely precipitated, it was stirred and aged at 50°C for 12 hours. The precipitate was filtered, washed with deionized water three times, and the precipitate was calcined in a muffle furnace at 350° C. for 12 hours to obtain a manganese silicate dearsenic agent precursor. The manganese silicate catalyst is added into an appropriate amount of binder, kneaded and extruded to obtain the manganese silicate arsenic removal agent Cat-3.

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Abstract

The invention belongs to the field of gasoline dearsenification agents, and particularly relates to a preparation method of a low-temperature FCC (fluid catalytic cracking) gasoline dearsenification agent. The preparation method comprises the following steps of: (1) dropwisely adding completely dissolved sodium silicate and manganese salt, mixing, and uniformly stirring; (2) stirring and aging themixed solution for 2-12 hours, washing, filtering, and calcining in a muffle furnace at 350-400 DEG C for 2-12 hours to obtain a manganese silicate catalyst precursor; and (3) adding an adhesive, kneading, extruding and molding to obtain the target product, namely the low-temperature FCC gasoline dearsenification agent. The target product provided by the invention has large specific surface areaand arsenic capacity and high arsenic removal selectivity, and does not cause side reaction of unsaturated hydrocarbon in gasoline or gasoline octane number loss in the arsenic removal process.

Description

technical field [0001] The invention belongs to the field of arsenic removal agent for gasoline, in particular to a preparation method of a low-temperature FCC gasoline arsenic removal agent. Background technique [0002] Arsenic is widely present in crude oil. Due to its active chemical structure and properties, it can react with platinum, palladium and other precious metal catalysts in catalytic hydrogenation and reforming processes, resulting in permanent deactivation of the catalysts, affecting the normal operation of the process and production. to huge economic losses. In addition, arsenic compounds are biologically toxic. In today's highly utilized petroleum products, the existence of arsenic is a hazard to human health and the human environment. In light liquid petroleum hydrocarbons with low boiling points such as naphtha and FCC gasoline, the arsenic compounds are mainly hydrocarbon organic arsenic compounds. Due to the difference in the origin of crude oil and the...

Claims

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Application Information

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IPC IPC(8): C10L10/18C10L1/12
CPCC10L10/18C10L1/10C10L1/1291C10L2300/20
Inventor 黎胜可施岩孟祥祺王晓蔷陈成孙尚琪陈立
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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