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Method for removing sulfides in methyl tertiary butyl ether by using activated carbon

A kind of methyl tertiary butyl ether, activated carbon technology, applied in ether separation/purification, ether preparation and other directions

Inactive Publication Date: 2012-10-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent ZL 03825154.X and U.S. Patent US 7022885 disclose a method for refining MTBE using large-pore zeolite (13X or Y), which can remove impurities such as water, methanol, acetone, methyl ethyl ketone, and tert-butyl ketone in MTBE, but does not Cases involving sulfide removal

Method used

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  • Method for removing sulfides in methyl tertiary butyl ether by using activated carbon
  • Method for removing sulfides in methyl tertiary butyl ether by using activated carbon
  • Method for removing sulfides in methyl tertiary butyl ether by using activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add commercially available powdered activated carbon into a three-necked flask containing raw material MTBE at a volume ratio of 4%, and react at room temperature for 2 hours under nitrogen protection. After the reaction stops, suck out MTBE with a syringe with a filter screen, and the refined MTBE product is analyzed by sulfur element The instrument analyzes the total sulfur content and the gas chromatography analysis type sulfur content. (See Table 1)

[0017] Table 1

[0018]

[0019]

Embodiment 2

[0021] The continuous reaction test adopts a fixed bed reactor. The reactor is equipped with 20ml granular activated carbon (20-40 mesh), and the raw material MTBE directly enters the activated carbon bed through heat exchange. The reaction temperature is controlled at 25 ° C. The volumetric space velocity of the MTBE material is 1.0h -1 , the pressure is normal pressure. After the reaction was carried out for 1 day, the refined MTBE product was analyzed by a sulfur element analyzer for total sulfur content and gas chromatographic analysis type sulfur content. (See Table 2)

[0022] Table 2

[0023]

Embodiment 3

[0024] Embodiment 3: continuous reaction test adopts fixed-bed reactor, and 20ml coconut shell spherical activated carbon (20~40 orders) is housed in the reactor, and raw material MTBE directly enters activated carbon bed layer through heat exchange, and reaction temperature is controlled at 25 ℃, The volume space velocity of MTBE material is 5.0h -1 , the pressure is normal pressure. After the reaction was carried out for 1 day, the refined MTBE product was analyzed by a sulfur element analyzer for total sulfur content and gas chromatographic analysis type sulfur content. (See Table 3)

[0025] table 3

[0026]

[0027]

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Abstract

The invention relates to a method for removing sulfides in methyl tertiary butyl ether by using activated carbon. The method includes enabling a methyl tertiary butyl ether raw material containing the sulfides to contact with the activated carbon to obtain a methyl tertiary butyl ether product; performing an intermittent reaction process for purification, adding the activated carbon with the volume accounting for 0.4-10% of that of the methyl tertiary butyl ether raw material into a reaction kettle filled with the methyl tertiary butyl ether raw material, performing room-temperature reaction for 0.5-4 hours under protection of nitrogen, and extracting the methyl tertiary butyl ether after the reaction stops; or performing a continuous reaction process by the aid of a fixed bed for purification, filling the activated carbon in a reactor of the fixed bed, controlling the reaction temperature to range from 20 DEG C to 80 DEG C and purifying the methyl tertiary butyl ether by continuous reaction. In the continuous reaction process, the liquid hourly space velocity of the methyl tertiary butyl ether raw material ranges from 1.0h-1 to 10h-1, and the pressure ranges from the atmospheric pressure to 1.0MPa. By the aid of the method, the sulfur content of the methyl tertiary butyl ether can be reduced to be lower than 10ppmw, and the disulfide content is lower than or equal to 2ppmw.

Description

technical field [0001] The invention relates to a method for refining methyl tert-butyl ether (MTBE), in particular to a method for removing sulfides in methyl tert-butyl ether (MTBE) through an active carbon adsorption process. It can be used to prepare methyl tert-butyl ether (MTBE) with sulfur content ≤ 10ppmw and disulfide content ≤ 2ppmw. Background technique [0002] Methyl tert-butyl ether (MTBE) is a high-quality high-octane gasoline additive component, widely used in blended gasoline. It is characterized by high octane number (RON117, MON107), good miscibility with gasoline, and can be miscible with gasoline in any proportion without phase separation. Although North America has banned MTBE as a gasoline additive since 2008, the use of MTBE as a gasoline blending component in Europe and the Asia-Pacific region has not been significantly affected, and its domestic demand will grow steadily for a period of time. [0003] The sulfur content of MTBE is generally not us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/36
Inventor 胡雪生李潇李玮陈静范明白跃华
Owner PETROCHINA CO LTD
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