Process of removing sulfide from petroleum product

A technology for petroleum products and sulfides, which is applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of low adsorption efficiency, difficult regeneration, and inability to regenerate, and achieves high removal rate of sulfides, convenient oil separation, and easy regeneration. Effect

Inactive Publication Date: 2007-08-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorbent used in the existing adsorption method has low adsorption efficiency, difficult regeneration, complex process, and high regeneration treatment cost. Some adsorbents, such as silver-containing molecular sieves, have a good effect but are expensive and cannot be regenerated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: make adsorbent with single metal magnetic material Ni (P), Ni (B) magnetic material

[0016] Ni(P), Ni(B) nano-alloy films can be easily prepared by chemical deposition. The infiltration of P and B here can make Ni easy to form Ni grains during the deposition process. Ni crystal is a strong magnetic material. Use this magnetic material as an adsorbent, add it into a diesel sample according to the mass ratio of the magnetic particles and diesel oil at 2% (the content in the sample is 1200ppm), stir and contact at 90°C for 3 minutes, absorb the sulfur compounds in the diesel, filter and separate The magnetic adsorbent is used to detect diesel oil by burning lamp method, and the sulfide removal rate can reach more than 66%. Take out the adsorbent and wash it with water with 3 times the quality of the adsorbent. After washing, the adsorbent can be reused after drying, and the adsorption effect will hardly decrease.

Embodiment 2

[0017] Embodiment 2: make adsorbent with Fe-Si magnetic material

[0018] In the experiment, Fe powder (purity 99.9%, initial particle size-200 mesh) and Si powder (purity 99.9%, initial particle size-200 mesh) were used in the ratio of 75:25 atomic percentage. The experiment used high-energy planetary ball mill, vacuum ball mill jar and stainless steel ball produced by Nanjing University Instrument Factory. High-speed ball milling was performed with a ball-to-material ratio of 15:1 and a rotational speed of 200 r / min, and argon was used as a protective gas. Ball mill for 48h-98h, and then put the ball-milled powder in a tubular high-temperature furnace for annealing heat treatment under a hydrogen protective atmosphere. Composite Fe-Si magnetic powder was obtained. The ratio of this magnetic material to gasoline is 1%, at 30°C and an external 1.5T magnetic field, stirring and contacting for 5 minutes, absorbing sulfide in gasoline, the initial sulfur content is 240ppm, dete...

Embodiment 3

[0019] Embodiment 3: make adsorbent with alloy magnetic material NdFeB magnetic material

[0020] will be composed as Nd 10.2 PR 3 Dy 0.5 Fe 80 Al 0.3 B 6 The alloy is smelted in an induction furnace under an Ar atmosphere, and a rapid-quenching thick strip with a thickness of 200-300 μm is made by strip casting (Strip2casting) technology, wherein the melt temperature is 1200-1500 ° C, and the roll speed is 1 m / s. After absorbing hydrogen at room temperature, the thick tape is dehydrogenated in vacuum at 600°C, and is jet-milled to produce powder particles with an average particle size of about 5 μm. After being oriented and pre-pressed by a magnetic field (1.5T), it is put into a graphite mold for SPS sintering, and is prepared as High performance NdFeB permanent magnet material. The mass ratio of this magnetic material to aviation coal is 0.5%, and it is stirred and contacted at 30°C for 20 minutes to absorb sulfide in aviation coal. The initial sulfur content is 42...

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Abstract

The present invention proposes method of removing sulfide from petroleum product. Adsorbent of inorganic magnetic particle is first made to contact with petroleum product at 30-200 deg.c to adsorb sulfide from petroleum product, and then separated to obtain petroleum product with sulfide removed. The present invention adsorbs sulfide from petroleum product by means of the mutual action between magnetic field and organic molecular magnetic moment, and has easy adsorbent regeneration, high sulfide removing rate up to 75 %, easy separation between the oil and the adsorbent and low cost.

Description

technical field [0001] The present invention relates to a method for removing sulfur compounds from petroleum products. It is suitable for the desulfurization process of gasoline, aviation fuel, diesel oil, wax oil and other products. Background technique [0002] With the continuous enhancement of people's awareness of environmental protection, the pollution caused by automobile exhaust has become the focus of people's attention. Sulfur in crude oil is the non-hydrocarbon component that has the greatest impact on petroleum processing and its products. Sulfur in fuel oil (especially vehicle fuel oil) is one of the important causes of urban air pollution. [0003] Crude oil usually contains 0.1-5.5% sulfur, except for elemental sulfur and hydrogen sulfide, these sulfur mainly exist in the form of organic compounds, of which thiophene compounds usually account for 60%-80% of the total sulfur, non-thiophene sulfides Mainly include mercaptans, thioethers, disulfides, and sulfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00
Inventor 陈标华王亮黄崇品李英霞
Owner BEIJING UNIV OF CHEM TECH
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