A kind of normal temperature dearsenic agent and its preparation method and application

A technology of arsenic removal and surfactant, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc. It can solve the problems of unstable outlet accuracy, low arsenic capacity, and short life of normal temperature arsenic removal agents. and other problems, to achieve excellent catalytic performance, high arsenic capacity, and long service life

Active Publication Date: 2019-01-22
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems in the prior art that the export accuracy of the normal temperature dearsenic agent is unstable, sometimes large and sometimes small, and the arsenic capacity is low, and the service life is short, and further provides a new normal temperature dearsenic agent and its preparation method

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  • A kind of normal temperature dearsenic agent and its preparation method and application

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Embodiment 1

[0050] Embodiment 1, preparation novel normal temperature arsenic removal agent:

[0051] A preparation method of a novel normal temperature arsenic removal agent, comprising the steps of:

[0052] 1) Pretreatment of the carrier: Under the environment of nitrogen protection, 100g of titanium-aluminum carrier (wherein the mass fraction of titanium oxide is 30%) is treated under the following conditions: firstly, the heating rate is 2°C / min from 70°C to Raise the temperature to 400°C, and keep it at a constant temperature of 400°C for 40 minutes; then raise the temperature to 550°C at a heating rate of 3°C / min, and roast at 550°C for 3 hours, and cool to room temperature to obtain a pretreated carrier; after detection by an automatic adsorption instrument, It is known that the specific surface area of ​​the pretreatment carrier is 350m 2 / g, the pore size is 5nm;

[0053] 2) Immerse the pretreated carrier in step 1) in an aqueous solution of nickel nitrate with a molar concent...

Embodiment 2

[0057] Embodiment 2, preparation novel normal temperature arsenic removal agent:

[0058] A preparation method of a novel normal temperature arsenic removal agent, comprising the steps of:

[0059] 1) Pretreatment of the carrier: under the environment of nitrogen protection, the specific surface area of ​​1g is 300m 2 / g, pore diameter of 5nm titanium aluminum carrier (wherein the mass fraction of titanium oxide is 40%) is processed under the following conditions: first, the temperature is raised to 400°C with a heating rate of 2°C / min, and kept at a constant temperature of 400°C 40min; then heated up to 550°C at a heating rate of 5°C / min, and roasted at 550°C for 3h, cooled to room temperature to obtain a pretreated carrier; through an automatic adsorption instrument, it was known that the specific surface area of ​​the pretreated carrier was 300m 2 / g, the pore size is 6nm;

[0060] 2) Immerse the carrier pretreated in step 1) in an aqueous solution of nickel nitrate with ...

Embodiment 3

[0064] Embodiment 3, preparation novel normal temperature arsenic removal agent:

[0065] A preparation method of a novel normal temperature arsenic removal agent, comprising the steps of:

[0066] 1) The specific surface area of ​​50g is 500m 2 / g, the alumina carrier with a pore diameter of 4nm is impregnated in the aqueous solution of nickel nitrate with a molar concentration of 1mol / L. 60°C for 1 hour; after filtering, dry the retentate at 120°C for 12 hours, and finally bake it in a muffle furnace at 450°C for 3 hours to obtain a NiO-loaded carrier, so that the NiO loading amount accounts for the alumina carrier 0.5% of mass;

[0067] 2) Immerse the NiO-loaded carrier in step 1) in an aqueous solution of copper nitrate with a molar concentration of 4mol / L, and add surfactant PEG2000 accounting for 0.1% of the mass of copper nitrate to the aqueous solution of copper nitrate until completely dissolved, The impregnation conditions are as follows: use ultrasonic impregnati...

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Abstract

The invention discloses a novel normal temperature arsenic removal agent as well as its preparation method and application. The arsenic removal agent comprises a carrier and a Cu-Ni active component loaded on the carrier, the Cu-Ni active component is CuO and NiO; the mass ratio of the carrier, CuO and NiO is 100:(1-Ni 10): (1‑10). The preparation method comprises the following steps: 1) immersing the carrier in the aqueous solution of the soluble nickel salt, filtering off the filtrate, and then drying and roasting in sequence to obtain a NiO-loaded carrier; 2) making the NiO-loaded carrier Immerse in the aqueous solution of the soluble copper salt, filter the filtrate, and then perform drying and roasting in sequence to obtain the CuO-loaded carrier, that is, the arsenic removal agent. The arsenic removal agent can effectively remove inorganic arsenic in catalytic cracking gasoline at normal temperature, the accuracy can reach below 10ppb, and the arsenic content is greater than 1.3%.

Description

technical field [0001] The invention belongs to the technical field of inorganic arsenic removal, and in particular relates to a novel normal temperature arsenic removal agent and its preparation method and application. Background technique [0002] Nowadays, due to the increasing demand for petroleum, the exploitation also increases. In petroleum hydrocarbons, arsenic mostly exists in the form of organic compounds with hydrocarbon groups. The outermost electronic structure of arsenic is 4s 2 4p 3 , so the arsenic atom can form stable bonds with the three substituents. It is generally believed that arsenic compounds in petroleum hydrocarbons have R 3 The form of As, wherein R is a hydrogen atom or a hydrocarbon group, such as methyl, ethyl, propyl or phenyl, etc. [0003] Conversion of organic arsenic to inorganic arsenic by hydrogenation (A S h 3 ), such as the removal of inorganic arsenic from ethylene, and the use of various catalysts in the refining of ethylene. Mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10C10G45/06
CPCB01J23/002B01J23/755B01J35/1019B01J35/1061B01J2523/00C10G45/06C10G2300/1037C10G2300/201C10G2400/02B01J2523/17B01J2523/31B01J2523/47B01J2523/847
Inventor 刘晓龙
Owner SHENYANG SANJUKAITE CATALYST
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