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Liquid state petroleum hydrocarbon normal temperature dearsenicating agent and preparation method thereof

A technology for liquid petroleum and arsenic removal agent, which is applied in the petroleum industry, refined hydrocarbon oil, etc., and can solve the problems of different design requirements and blanks.

Inactive Publication Date: 2008-04-30
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although US20040050795A1 discloses a highly ordered mesoporous molecular sieve as a carrier, loaded with lanthanide metals for the removal of arsenate in fluids, and the arsenic removal agent has high selectivity, fast and high adsorption capacity, but This patent is limited to the arsenic removal of water and gaseous fluids, and the arsenic compounds in the fluids are limited to inorganic arsenic compounds. As we all know, the adsorption and removal properties of organic arsenic and inorganic arsenic are completely different, and the design requirements for arsenic removal materials completely different
Therefore, the current research on mesoporous molecular sieve-based liquid petroleum hydrocarbon arsenic removal materials is almost blank.

Method used

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Examples

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preparation example Construction

[0033] The present invention also provides a preparation method of the arsenic removal agent, which comprises loading the active component of the arsenic removal on the mesoporous molecular sieve, and then mixing and molding the mesoporous molecular sieve loaded with the active component and the auxiliary material for structure forming by a conventional method , and finally heat-treat the molded green body to form the arsenic removal agent.

[0034] In a preferred example, the preparation method comprises the steps of:

[0035] (i) Compounding the mesoporous molecular sieve with the active component precursor, wherein said mesoporous molecular sieve has an average pore diameter of about 2-50nm and a specific surface area of ​​about 100m 2 / g~1000m 2 / g;

[0036](ii) adding a structure-forming agent for molding and drying;

[0037] (iii) heat treatment at about 200-700° C. for 0.5-12 hours to obtain the arsenic-removing agent.

[0038] Compared with the existing liquid petr...

Embodiment 1

[0045] Molecular sieve preparation

[0046] 300 mL of water and 1200 g of 2M hydrochloric acid aqueous solution were mixed, placed in a water bath at 40°C, heated and stirred. Add 40.0 grams of ethylene oxide-propylene oxide copolymer to this solution, (purchased from Aldrich Company, average molecular weight 4000, denoted as S123, the same below), continue to stir until the solution is a transparent solution, and then mix 91.0mLTEOS (tetraorthosilicate Ethyl ester) was added dropwise to the above solution, after the dropwise addition was completed, the solution was stirred for 20 h to obtain a white turbid liquid, and the mixture was added to a polytetrafluoroethylene-lined crystallization kettle and crystallized at 80°C for 24 Hours. Filter the obtained solid matter with a glass sand core funnel and wash until there is no chloride ion in the filtrate. After heat treatment at 550° C. for 4 hours, a white powder is obtained. The obtained mesoporous molecular sieve material ha...

Embodiment 2

[0052] Weigh 4.11g aluminum isopropoxide, measure 90.0mL tetraethyl orthosilicate and 100mL HCl solution (PH=1.5) and stir and mix with magnetic force to obtain solution A. Weigh 40.0 g of S123 and dissolve it in 1500 mL of HCl solution (PH=1.5) and mix with magnetic stirring to obtain solution B. Add solution A dropwise to solution B under a water bath and stirring condition at 40°C, continue stirring for 5 hours after the dropwise addition, then transfer it to a crystallization kettle lined with polytetrafluoroethylene and crystallize at 100°C After 48 hours, filter the obtained solid matter with a glass sand core funnel and wash until there is no chloride ion in the filtrate. After heat treatment at 550°C for 4 hours, a white powder is obtained. The average pore diameter of the obtained mesoporous molecular sieve material is 7±2nm, and the specific surface 500m 2 / g, the pore volume is 1.1mL / g.

[0053] Catalyst preparation and arsenic removal evaluation are the same as i...

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Abstract

The invention discloses a normal temperature arsenic-removing agent of liquid-oil hydrocarbon and preparing method, which consists of 50-99% middle-hole molecular sieve with arsenic-removing component and 1-50% structural moulding auxiliary material, wherein the molecular sieve is silica middle-hole molecular sieve or silicon-aluminium middle-hole molecular sieve with even aperture at 2-50nm and specific area at 100-1000m2 / g, which is selected from one or more composition of nitrate or chloride or sulfate or sulfide or oxalic compound with Cu, Fe, Mn, Ni and Si; the former of active component contains 0.01-20% metal in the arsenic-removing agent.

Description

technical field [0001] The invention relates to an additive for petroleum processing and separation, in particular to a normal-temperature dearsenic agent for liquid petroleum hydrocarbons. Background technique [0002] It is well known that arsenic compounds in petroleum hydrocarbons, especially liquid petroleum hydrocarbons, have obvious negative effects on their subsequent processing. The most prominent problem is the poisoning caused by the catalyst. Arsenic compounds are also easy to deposit on the surface of pipelines, corrode pipelines, and cause hidden dangers. In severe cases, arsenic will prevent certain processes from proceeding smoothly. Such arsenic will seriously affect the quality and economic benefits of the product. Therefore, the content of arsenic compounds in petroleum hydrocarbons must be controlled within certain standards. For example, the arsenic content of naphtha products should be less than 20 ng / g. In order to remove arsenic from petroleum hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G25/05
Inventor 张长远李建龙曹育才
Owner SHANGHAI RES INST OF CHEM IND
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