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Preparation method of waterproof iron oxide-based desulfurizer

An iron oxide-based, desulfurizing agent technology, applied in chemical instruments and methods, refining with metal oxides, separation methods, etc., can solve the problems of easy agglomeration, mechanical mixing difficulty, low chemical activity of magnesium sulfate, etc. Easy to mix, easy to put into production immediately, low cost effect

Active Publication Date: 2014-09-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical activity of magnesium sulfate is relatively low, mechanical mixing is difficult, and agglomeration is easy to form during processing.

Method used

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  • Preparation method of waterproof iron oxide-based desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] FeSO 4 ·7H 2 O (content ≥99.0%, AR) 70.0g, NaOH (content ≥96.0%, AR) 20g were dissolved in 30°C distilled water, FeSO 4 The solution was slowly added to the NaOH solution while stirring well. After reacting for 20min, centrifuge to wash SO4 2- , until the filtrate meets Ba 2+ No precipitate formed. Put the precipitate in the air and dry it to 20g~25g, add 1.5g of CaO to the precipitate, mix well, oxidize in the air for 2h, then add 1.8g of MgO, MgCl 2 ·7H 2 O2.6g, NaHCO 3 0.2g is mixed thoroughly to form a precursor. The precursor is extruded into a bar-shaped column with a diameter of 3 mm and a length of 5-8 mm. Put it into an oven, dry at 68°C for 3 hours, turn off the oven, and let it cool down to room temperature naturally to prepare desulfurizer A.

Embodiment 2

[0014] In the precipitate obtained in Example 1, add CaO0.5g, MgO1.8g, MgCl 2 ·7H 2 O2.6g, NaHCO 3 0.2g is mixed thoroughly to form a precursor. The precursor is extruded into a bar-shaped column with a diameter of 3 mm and a length of 5-8 mm. Put it into an oven, dry it at 68°C for 3 hours, turn off the oven, and let it cool down to room temperature naturally to prepare desulfurizer B.

Embodiment 3

[0016] In the precipitate obtained in Example 1, add CaO0.5g, MgO0.9g, MgCl 2 ·7H 2 O1.3g, NaHCO 3 0.2g is mixed thoroughly to form a precursor. The precursor is extruded into a bar-shaped column with a diameter of 3 mm and a length of 5-8 mm. Put it into an oven, dry at 68°C for 3 hours, turn off the oven, and let it cool down to room temperature naturally to prepare desulfurizer C.

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Abstract

The invention relates to a preparation method of a waterproof iron oxide-based desulfurizer. The preparation method comprises the following steps of 1, respectively dissolving a soluble ferrous salt and an alkaline precipitating agent by distilled water, and slowly adding the ferrous salt solution into alkali liquor to obtain colloid having a mole ratio of ferrous ions to hydroxide ions of 1: 2 to 2.5, 2, carrying out centrifugation and full washing by distilled water to obtain iron hydrate, and 3, mixing the iron hydrate with a binder and a pore-forming agent, and carrying out layering and drying to obtain an iron-based desulfurizer, wherein in the layering and drying, CaO as the binder is added first, then an oxidation process is carried out in air for 1-3h, then MgO and MgCl2.6H20 as the binders are added into the reaction system so that Cl-O-Mg gel is obtained, the mass of the used binders is 4-10% that of the iron hydrate, the mass of the used pore-forming agent is 0-1% that of the iron hydrate, and extruded columnar particles are dried at a temperature of 50-110 DEG C for 1-4h so that the waterproof iron oxide-based desulfurizer is obtained. The preparation method has simple processes, a low cost, less investment and high efficiency. The waterproof iron oxide-based desulfurizer can be recycled.

Description

Technical field: [0001] The invention belongs to the technology in the field of purification of chemical raw material gas and light oil products, and in particular relates to a preparation method of a desulfurizer used at normal temperature and pressure to remove hydrogen sulfide from naphtha containing trace amounts of water. Background technique: [0002] Hydrogen sulfide is a highly irritating gas with a strong smell of rotten eggs. The presence of hydrogen sulfide will not only cause corrosion of equipment and pipelines, catalyst poisoning, increase of production costs, decline in product quality, but also seriously threaten personal safety. When containing H 2 When S fuel is burned, a large amount of SO is released X Gases that pollute the atmosphere and contribute to acid rain and the greenhouse effect. [0003] With the development of inferior and heavy crude oil, the hydrogen sulfide (H 2 S) The volume fraction is between 400 and 1200 μL / L, which not only poses a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/16B01D53/52
Inventor 郝春来韩非邵子文高原任建平石洪波张英杰辛乐闫小燕刘志刚
Owner PETROCHINA CO LTD