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Liquid-state petroleum hydrocarbon dearsenicing agent with dual medium-hole structure distribution and preparing method thereof

A liquid petroleum, double mesoporous technology, applied in the direction of refining with metal salts, etc., can solve problems such as blanks

Inactive Publication Date: 2011-04-13
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] According to the above, it can be seen that the current research on double mesoporous molecular sieve-based liquid petroleum hydrocarbon dearsenic materials at room temperature is almost blank.

Method used

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preparation example Construction

[0033] The present invention also provides a preparation method for the arsenic removal agent, the method comprises compounding the active component of the arsenic removal on the double mesoporous molecular sieve, and then mixing the mesoporous molecular sieve compounded with the active component and the auxiliary material for structure forming by a conventional method and forming, and finally heat-treating the formed green body to form the arsenic removal agent.

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

[0035] (i) Composite the double mesoporous molecular sieve with the active component precursor, wherein said double mesoporous molecular sieve has an average small pore diameter of 2-20nm and an average large pore diameter of 6-50nm, and the large pore does not contain Less than 10% of the total pore volume, the total pore volume is 1.0-1.9cm 3 / g, specific surface area 300-1200m 2 / g;

[0036] (ii) adding a structure-forming agent for ...

Embodiment 1

[0045] Preparation of double mesoporous molecular sieves

[0046] 8.6 grams of Triton X-114 (purchased from Amresco) were dissolved in 200ml of pH = 1.5 aqueous hydrochloric acid solution, and 16ml of water glass (27% SiO 2 , 14% NaOH) was dissolved in 200ml of water and added to the above solution under stirring. And stirred at 40°C for 20h to obtain a white cloudy liquid, this mixture was added into a polytetrafluoroethylene-lined crystallization kettle and crystallized at 80°C for 24 hours. The obtained solid matter was filtered with a glass sand core funnel and washed until there was no chloride ion in the filtrate, and a white powder of double mesoporous molecular sieves was obtained after heat treatment at 550° C. for 4 hours. The yield was 87%. The average pore diameter of the small pores of the obtained double mesoporous molecular sieve material is 2.5nm, the pore diameter of the large pores is 10-20nm, the pore volume of the large pores accounts for 30% of the total...

Embodiment 2

[0052] Tetraethyl orthosilicate, cetyltrimethylammonium bromide, water and ammonia water were mixed and stirred at room temperature for 20 h at a molar ratio of 1:0.2:160:1.5 to obtain a white cloudy liquid, which was added to the Crystallization was carried out at 80°C for 24 hours in a polytetrafluoroethylene-lined crystallization kettle. The resulting solid material was filtered through a fritted glass funnel and washed until neutral. Add the above-washed substance to an alkaline aqueous solution (pH=10) containing 5% S123, (purchased from Aldrich Company, ethylene oxide-propylene oxide copolymer average molecular weight 4000,). Heat and stir in a water bath at 40°C for 20 hours to obtain a white turbid liquid. This mixture was added to a polytetrafluoroethylene-lined crystallization kettle and crystallized at 100°C for 24 hours. The obtained solid matter was filtered with a glass sand core funnel and washed until neutral, and after heat treatment at 550° C. for 4 hours, a...

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Abstract

The invention provides a de-arsenic agent for the liquid petroleum hydrocarbon with the double mesopore structure and a preparation method thereof. The de-arsenic agent includes: 50-99% of the double mesopore molecular screen with the de-arsenic activity and the 1-50% of molding assistant material. The molecular screen is the SiO2 or Silal double mesopore molecular screen which has the average small eye of 2-20nm diameter and average big eye of 6-50nm diameter. The big eye volume is not less than the 10% of the whole eye volume which is 1.0-1.9 cm<3> / g, the specific area is 300-1200 m<2> / g. the de-arsenic activity component is one or more of the Cu, Fe, Mn, Ni and the Ag which is 0.01-20% of the metal content. So the de-arsenic agent has the high arsenic content, good water resistance and good de-arsenic character.

Description

technical field [0001] The invention relates to an additive for petroleum processing and separation, in particular to a liquid petroleum hydrocarbon dearsenic agent. 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 hydrocarbons, people have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G29/06
Inventor 张长远曹育才李建龙李阳阳马静君
Owner SHANGHAI RES INST OF CHEM IND
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