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Method for deeply removing sulfides in gasoline additive, namely methyl tert-butyl ether

A technology of methyl tert-butyl ether and gasoline additive, which is applied in chemical instruments and methods, silicon compounds, ether separation/purification, etc., can solve the problems of poor desulfurization effect and product quality degradation, and achieves low operating cost and low investment. Effect

Inactive Publication Date: 2013-06-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation method usually uses hydrogen peroxide with a mass concentration of 30% as the oxidant. Due to the large water content of the oxidant, the desulfurization effect is poor at room temperature, and a small amount of water will be dissolved in the methyl tert-butyl ether product, resulting in a decline in product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] First prepare 10 g of an aqueous solution of copper nitrate with a mass concentration of 35%, add 2 g of silica gel adsorbent, soak for 90 minutes, filter and dry the adsorbent containing copper nitrate at 120° C. to constant weight. The mass ratio of nitrate to adsorbent is 0.2:1. A nitric acid solution with a mass concentration of 68% was added and loaded onto the above-mentioned adsorbent under stirring at room temperature, and the mass ratio of the nitric acid solution to the adsorbent was 0.25:1. Adsorbent and methyl tert-butyl ether with a sulfur content of 253 μg / g are reacted at 40° C. for 20 minutes at a mass ratio of 0.02:1 to reduce the sulfur content in methyl tert-butyl ether to 3 μg / g. After the reaction, the adsorbent can be regenerated by heating with nitrogen at 60°C, blowing off, drying and regenerating.

Embodiment 2

[0011] First prepare 10 g of silver nitrate aqueous solution with a mass concentration of 0.05%, add 2 g of SBA-15 adsorbent, soak for 30 minutes, filter and dry the adsorbent containing silver nitrate at 100° C. to constant weight. The mass ratio of nitrate to adsorbent is 0.05:1. A nitric acid solution with a mass concentration of 40% was added and loaded onto the above-mentioned adsorbent under stirring at room temperature, and the mass ratio of the nitric acid solution to the adsorbent was 0.05:1. Adsorbent and methyl tert-butyl ether with a sulfur content of 128 μg / g are reacted at 15° C. for 90 minutes at a mass ratio of 0.25:1 to reduce the sulfur content in methyl tert-butyl ether to 5 μg / g. After the reaction, the adsorbent can be regenerated by heating with nitrogen at 90°C, blowing off, drying and regenerating.

Embodiment 3

[0013] First prepare 10 g of nickel nitrate aqueous solution with a mass concentration of 25%, add 2 g of MCM-41 adsorbent, soak for 60 minutes, filter and dry the adsorbent containing nickel nitrate to constant weight at 110°C. The mass ratio of nitrate to adsorbent is 0.1:1. A nitric acid solution with a mass concentration of 68% was loaded onto the above-mentioned adsorbent under stirring at room temperature, and the mass ratio of the nitric acid solution to the adsorbent was 0.15:1. Adsorbent and methyl tert-butyl ether with a sulfur content of 217 μg / g are reacted at 30° C. for 60 minutes at a mass ratio of 0.15:1 to reduce the sulfur content in methyl tert-butyl ether to 2 μg / g. After the reaction, the adsorbent can be regenerated by heating with nitrogen at 80°C, blowing off, drying and regenerating.

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PUM

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Abstract

The invention discloses a method for deeply removing sulfides in a gasoline additive, namely methyl tert-butyl ether. The desulfurization process is as follows: firstly loading nitrates of metal elements Cu, Ag and Ni onto an adsorbent by adopting an immersion method, then heating and drying at the temperature of 100 DEG C-120 DEG C, loading a nitric acid solution on the adsorbent after drying under the condition of stirring at room temperature, and enabling the adsorbent after the completion of loading to react with the methyl tert-butyl ether at the temperature of 15 DEG C-40 DEG C for 20-90 minutes so as to deeply remove the sulfides in the methyl tert-butyl ether. The adsorbent can be recycled after adopting nitrogen to heat, blow-off, dry and regenerate. By adopting the method disclosed by the invention, the sulfides in the methyl tert-butyl ether can be fast, effectively and deeply removed, the adsorbent can be reused after regeneration, and the method has the characteristics of low investment and low operation cost.

Description

Technical field: [0001] The invention relates to the technical field of petroleum processing, in particular to a method for deeply removing sulfides in gasoline additive methyl tert-butyl ether. technical background: [0002] With the continuous increase in the number of motor vehicles, motor vehicle exhaust emissions have become one of the main sources of urban air pollution. The quality standards of gasoline for vehicles have been continuously upgraded, and the restrictions on the sulfur content of gasoline have become more and more stringent. Methyl tert-butyl ether, abbreviated as MTBE (methyl-tert-butyl ether), is an excellent gasoline high-octane additive and antiknock agent. MTBE and gasoline components can be miscible in any proportion without stratification. When blended with gasoline components, it has a good blending effect, and the blended octane number is higher than its net octane number. MTBE has stable chemical properties and relatively high oxygen content, ...

Claims

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Application Information

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IPC IPC(8): C07C43/04C07C41/36B01J20/30B01J20/10
Inventor 王胜强严黎
Owner NANKAI UNIV
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