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Liquid hydrocarbon de-arsenic agent and preparation method thereof

A liquid hydrocarbon and arsenic removal technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high cost of producing catalyst powder, high cost of preparation and operation , complex catalyst preparation, etc., to achieve the effect of optimized pore size distribution, good mechanical strength, and large arsenic capacity

Active Publication Date: 2015-05-06
THE NORTHWEST RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Domestic scientific and technological workers have also carried out a lot of research work. For example, CN1294174A discloses a light oil product arsenic removal agent and its preparation method. The catalyst uses alumina and aluminosilicate molecular sieves as main components without impregnating active components. But the cost of producing catalyst powder is high
CN1197052A discloses a method for removing arsenic from liquid hydrocarbons. The arsenic removal agent used is copper oxide or copper sulfide prepared by a precipitation method. They are suitable for low-temperature, low-pressure and hydrogen-free conditions, but the preparation of the catalyst is complicated. Need to be vulcanized before, so the preparation and operation costs are high
CN1278523A discloses a catalyst for removing trace arsenic compounds in hydrocarbons at normal temperature and its preparation method. The catalyst is composed of CuO, ZnO, Al 2 o 3 Complicated preparation method and high cost
CN1030440A discloses a method for removing phosphorus and arsenic compounds in liquid hydrocarbons, which can be used for naphtha and gasoline purification, but the active component nickel has a hydrogenation effect on unsaturated hydrocarbons in the cracked gas, which changes the raw material composition, At the same time, it needs to be reduced at above 300°C before operation, which is complicated and costly
The above-mentioned arsenic removal agents have problems such as high cost, complicated preparation process, and low arsenic capacity.

Method used

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  • Liquid hydrocarbon de-arsenic agent and preparation method thereof
  • Liquid hydrocarbon de-arsenic agent and preparation method thereof
  • Liquid hydrocarbon de-arsenic agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1: Preparation of liquid hydrocarbon dearsenic agent

[0077] The implementation steps of this embodiment are as follows:

[0078] Step A: Activated carbon pretreatment

[0079] Put 100g of activated carbon into 300ml of nitric acid solution with a concentration of 0.1mol / L, stir and reflux at a temperature of 75°C for 1 hour, then separate, wash the activated carbon with deionized water until neutral, and dry at a temperature of 100°C for 10.0 Hour, obtain the dry pretreatment active carbon;

[0080] Step B: First Dip

[0081] Add 80 g of the dry pretreated activated carbon obtained in step A to the lanthanum nitrate solution prepared by 2.66 g of lanthanum nitrate and 160 ml of deionized water, soak at room temperature for 6 hours, then dry at a temperature of 100 ° C for 10.5 hours, and then in a nitrogen atmosphere Roasting for 2 hours at a temperature of 250°C;

[0082] Step C: Second Dip

[0083] Add the impregnated activated carbon obtained in ste...

Embodiment 2

[0087] Embodiment 2: Preparation of liquid hydrocarbon dearsenic agent

[0088] The implementation steps of this embodiment are as follows:

[0089] Step A: Activated carbon pretreatment

[0090] Put 100g of activated carbon into 400ml of nitric acid solution with a concentration of 0.25mol / L, stir and reflux at a temperature of 100°C for 2 hours, then separate, wash the activated carbon with deionized water until neutral, and dry at a temperature of 110°C for 11.6 Hour, obtain the dry pretreatment active carbon;

[0091] Step B: First Dip

[0092] Add 82 g of dry pretreated activated carbon obtained in step A to the cerium nitrate solution prepared by 13.29 g of lanthanum nitrate and 164 ml of deionized water, soak at room temperature for 12 hours, separate, dry at a temperature of 110 ° C for 12.0 hours, and then Roasting at 300°C for 4 hours at atmosphere and temperature;

[0093] Step C: Second Dip

[0094] Add the first impregnated activated carbon obtained in step B...

Embodiment 3

[0098] Embodiment 3: Preparation of liquid hydrocarbon dearsenic agent

[0099] The implementation steps of this embodiment are as follows:

[0100] Step A: Activated carbon pretreatment

[0101] Put 100g of activated carbon into 500ml of nitric acid solution with a concentration of 0.5mol / L, stir and reflux at 90°C for 4 hours, then separate, wash the activated carbon with deionized water until neutral, and dry at 105°C for 12.0 hours , to obtain dry pretreated activated carbon;

[0102] Step B: First Dip

[0103] Add 84 g of dry pretreated activated carbon obtained in step A to the lanthanum nitrate solution prepared by 26.6 g of lanthanum nitrate and 168 ml of deionized water, soak at room temperature for 9 hours, separate, then dry at a temperature of 105 ° C for 10.8 hours, and then Roasting under nitrogen atmosphere and temperature 350°C for 3 hours;

[0104] Step C: Second Dip

[0105] Add the impregnated activated carbon obtained in step B for the first time to the ...

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Abstract

The invention relates to a liquid hydrocarbon de-arsenic agent and a preparation method thereof. The liquid hydrocarbon de-arsenic agent is prepared by preprocessing a carrier at one time and dipping at three times and is composed of CuO serving as an active component, La2O3 and CeO2 serving as transition metals, noble metal PdO, an AgO additive and an active carbon carrier. Compared with the conventional de-arsenic agent, the de-arsenic agent provided by the invention has the advantages of being high in de-arsenic precision, relatively high in de-arsenic rate, simple in preparation process and suitable for mass production and application.

Description

【Technical field】 [0001] The invention belongs to the technical field of catalysts. More specifically, the present invention relates to a liquid hydrocarbon arsenic removal agent, and also relates to a preparation method of the liquid hydrocarbon arsenic removal agent. 【Background technique】 [0002] Arsenic compounds widely exist in liquid petroleum hydrocarbons, and arsenic compounds have a significant impact on subsequent processing, and a small amount of arsenic compounds can cause catalyst poisoning. In order to avoid catalyst poisoning and deactivation, the arsenide in the raw material must be removed. A common method for removing arsenic from hydrocarbon raw materials is to pass the arsenic-containing compound raw material through a solid arsenic removal agent, so that the arsenic compound is either adsorbed by the arsenic removal agent, or reacts with the active components of the arsenic removal agent to be removed. remove. At present, people have carried out some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89
Inventor 周晓奇李军吴志涛高超吴鹏高维恒宋娥媚黄彦琦
Owner THE NORTHWEST RES INST OF CHEM IND
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