Method for reducing content of sulphur in gasoline

A technology of sulfur content and gasoline, applied in the field of hydrocarbon oil cracking, can solve the problems of destabilizing structure, loss of desulfurization activity, catalyst loss of activity, etc., to achieve the effect of improving desulfurization performance, improving product distribution, and enhancing stability

Active Publication Date: 2010-05-12
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned cracking catalysts with desulfurization function are all formed by loading metal compounds on a certain carrier. The metal ions are on the ion exchange site, and there are problems in hydrothermal stability. The metal will migrate from the original position to the molecular sieve, which not only loses the original desulfurization activity, but more seriously, vanadium can destroy the stable structure of the molecular sieve as the active component in the FCC catalyst, and finally cause the entire catalyst to lose its activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Synthesis of Ce-VAPO-5 molecular sieve: 15g dry rubber powder (Al 2 O 3Content 65.8%, produced by Changling Catalyst Factory), add 60mL of water and beat for 60 minutes, then slowly add 14g orthophosphoric acid solution (phosphoric acid content 85%, produced by Beijing Reagent Factory) dropwise therein. After stirring for 10 minutes, add 2.3g of vanadyl sulfate (V content 22%, dissolved in 2g of water), after stirring for 5 minutes, add 0.75g of cerium chloride (dissolved in 2g of water), continue stirring at room temperature for 60 minutes, then add 1mL / Add 16 ml template agent triethylamine (content 98%, produced by Beijing Reagent Factory) at a speed of 1 min. After continuing to stir for 1 hour, place in a crystallization kettle for dynamic crystallization at 175° C. for 72 hours. The obtained product was filtered and washed and dried at 80°C, and the sample was roasted at a temperature program in flowing air (120°C, 1 hour; 3°C / min to 550°C, kept for 4 hours and...

Embodiment 2

[0022] Synthesis of Fe-VAPO-5 molecular sieve: the preparation method is the same as in Example 1, wherein ferric nitrate is used instead of cerium chloride to obtain an aluminum phosphate molecular sieve containing both vanadium and iron. The X-ray diffraction (XRD) spectrum of the obtained product has the characteristics of VAPO-5 molecular sieve, the molar ratio of aluminum to vanadium is 20, and the molar ratio of aluminum to iron is 50.

[0023] According to the catalyst composition of Fe-VAPO-5 10 wt%, REUSY molecular sieve 30 wt%, aluminum sol 10 wt%, pseudo-boehmite 20 wt% and kaolin 30 wt%, catalyst A2 was prepared by spray drying.

Embodiment 3

[0025] Synthesis of Mg-VAPO-5 molecular sieve: the preparation method is the same as in Example 1, wherein magnesium chloride is used instead of cerium chloride to obtain an aluminum phosphate molecular sieve containing both vanadium and magnesium. The X-ray diffraction (XRD) spectrum of the obtained product has the characteristics of VAPO-5 molecular sieve, the molar ratio of aluminum to vanadium is 25, and the molar ratio of aluminum to magnesium is 25.

[0026] According to the catalyst composition of Mg-VAPO-5 10 wt%, REUSY molecular sieve 30 wt%, aluminum sol 10 wt%, pseudo-boehmite 20 wt% and kaolin 30 wt%, catalyst A3 was prepared by spray drying.

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Abstract

This invention discloses a method for lowering sulfur content of gasoline. The method comprises: contacting sulfur-containing crude oil with a desulfurization composition. The desulfurization composition comprises molecular sieves as desulfurization elements. The skeleton of each molecular sieve contains vanadium and a second metallic element M, which is selected from IIA, IIB, IVB, VIIB and VIIIBof the period table of elements or one of lanthanide rare earth elements. The method can effectively lower the sulfur content of gasoline in normal fluid cracking (FCC) condition, and improve the hydrothermal stability of FCC catalyst.

Description

technical field [0001] The invention relates to a method for cracking hydrocarbon oil, more specifically, relates to a method for reducing the sulfur content of gasoline by a catalytic cracking process. Background technique [0002] Fluid Catalytic Cracking (FCC) is a petroleum refining process, which is the main process of converting heavy fractions such as vacuum distillate oil or residues of heavier components into fractions with smaller molecules. It has been used on a large scale in petroleum refining commercial applications. Catalytic cracking raw materials usually contain sulfur in the form of organic sulfur compounds, such as mercaptans, thioethers, thiophenes and substituted thiophenes, etc. During the cracking process, half of the sulfur can be converted into hydrogen sulfide by decomposing non-thiophene sulfides, so cracking Sulfur impurities are very likely to exist in the product, and they enter the gasoline fraction in a certain proportion and enter the gasoli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/02
Inventor 郑金玉罗一斌宗保宁舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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