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Adsorbent for deep removal of organic sulfide and preparation method and application thereof

A technology of adsorbent and sulfide, which is applied in the field of desulfurization, can solve the problems of complex process, deactivation of adsorbent, and decline of adsorbent performance, and achieve the effects of simple preparation process, increased specific surface area, and mild operating conditions

Active Publication Date: 2016-02-24
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the desulfurizer has high production cost and complicated process, and it is difficult to meet the conditions of industrialization
However, the loading of active components will lead to blockage of the internal pores of the molecular sieve, reducing the specific surface area and pore volume of the molecular sieve, resulting in a decrease in the performance of the adsorbent, and the deactivation of the adsorbent is prone to occur after multiple regenerations.

Method used

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  • Adsorbent for deep removal of organic sulfide and preparation method and application thereof
  • Adsorbent for deep removal of organic sulfide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of acid-modified adsorbent: Weigh 100.0 g of 13X raw powder with a silicon-aluminum ratio of 2.2, mix it with 5.024 g of anhydrous acetic acid with a concentration of 5 mol / L, stir evenly, seal it and put it in an electric heating oven at 80°C, keep 8h. Weigh 5.037gCu(NO 3 ) 2 Dissolve in 44.057g of deionized water, and store the solution in the dark. Add 20.0g of kaolin and 2.215g of carboxymethyl cellulose to the acid-modified molecular sieve. After mixing evenly, pour the prepared copper nitrate aqueous solution. Material type, mechanical mixing 3h. After the raw materials are mixed evenly, a brown mixture is obtained. The humidity of the mixture should be slightly wet when rubbed with hands. The resulting mixture was extruded to obtain a strip-shaped material with a diameter of about 2 mm and a length of about 15 mm. The strip-shaped material obtained was transferred to a humid heat environment at 100° C. for aging for 24 hours. Finally, it was roa...

Embodiment 2

[0057] Preparation of acid-modified adsorbent: the preparation method is similar to that of Example 1, the precursor of the metal oxide active component used is silver nitrate, the calcination temperature is adjusted to 600° C., and the obtained adsorbent is designated as A2.

Embodiment 3

[0059] Conventional adsorbent preparation: compare the effect of acid treatment on molecular sieve specific surface, and prepare conventional 13X molecular sieve adsorbent. The specific implementation method is to weigh 13X raw powder with a silicon-aluminum ratio of 2.2, 25.0 g of kaolin, and 2.174 g of carboxymethyl fiber After the ingredients are mixed, add 45.022g of deionized water, after preliminary mixing, add the obtained raw materials to the mixing machine, and mechanically mix for 3 hours. After the raw materials are mixed evenly, a brown mixture is obtained. The humidity of the mixture should be slightly wet when rubbed with hands. The obtained mixed material is extruded into a strip to obtain a strip-shaped material with a diameter of about 2-2.4mm and a length distributed between 15-20mm. The strip-shaped material obtained was transferred to a humid heat environment at 100° C. for aging for 24 hours. Finally, it was calcined in a muffle furnace at 300°C for 5 hou...

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Abstract

The invention relates to an adsorbent for deep removal of organic sulfide and a preparation method and application thereof. The adsorbent is prepared from, by weight, 0.5-5 parts of active component, 55-70 parts of carrier, 0.5-2 parts of assistant, 15-45 parts of clay and 1-5 parts of binder. In the preparation process, the active component and the assistant are added into deionized water, and the mixture is stirred and mixed to be uniform; the carrier is added, the mixture is mixed to be uniform, and then the clay and the binder are added by weight part; after being fully stirred and mixed to be uniform, the mixture is transferred into a double-screw forming machine for stripping and forming to prepare a strip-type adsorbent, and then the strip-type adsorbent is cured and roasted. The adsorbent is used for deep removal of dimethyl disulfide in organic hydrocarbon. Compared with the prior art, the preparation process is simple, operation conditions are mild, a good removal effect is achieved on organic sulfide, particularly dimethyl disulfide can be removed deeply, desulfurization accuracy can reach the level below 20 ppb, and therefore the adsorbent has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and relates to an adsorbent for deep removal of organic sulfides and its preparation method and application, in particular to an adsorbent for deep removal of dimethyl disulfide in chemical raw materials and its preparation method with application. Background technique [0002] Petrochemical products, such as liquefied petroleum gas, natural gas, gasoline, diesel, etc., contain a wide variety of organic sulfides, including hydrogen sulfide, mercaptans, sulfides, disulfides, carbonyl sulfide, and polysulfides. After combustion of these organic sulfides, SO 2 or SO 3 , and then combine with water in the atmosphere to form acid fog or acid rain, which seriously affects the ecological environment and people's daily life. In addition, people's requirements for the quality of petroleum products are becoming more and more stringent, which makes the deep removal of organic sulfides become the ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01D15/00C10G25/00
Inventor 李春成王鹏飞徐华胜李豫晨何秋平
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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