Method for removing sulfides in MTBE by adsorptive distillation

An adsorption distillation, sulfide technology, applied in organic chemistry, ether separation/purification, ether preparation, etc., can solve problems such as MTBE loss

Inactive Publication Date: 2013-01-30
九江齐鑫化工有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, alkali washing processes such as diethanolamine are mainly used to remove sulfide in liquefied petroleum gas. However, due to the development trend of heavy and inferior crude oil, the sulfide molecules in liquefied petroleum gas increase, and it is difficult to achieve the removal of sulfide by existing technologies. Among them, the removal of sulfides meets the standard requirements; the removal of sulfides from gasoline, diesel and other hydrocarbon raw materials is generally carried out by hydrofining technology, but MTBE is an oxygen-containing compound, because the carbon-sulfur bond energy is much higher than the carbon-oxygen bond. Can, in the process of hydrodesulfurization, the carbon-oxygen bond in MTBE is hydrodeoxygenated first to generate corresponding alkanes, resulting in a large amount of MTBE loss

Method used

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  • Method for removing sulfides in MTBE by adsorptive distillation
  • Method for removing sulfides in MTBE by adsorptive distillation

Examples

Experimental program
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Effect test

Embodiment 1

[0019] MTBE desulfurization is carried out in an adsorption distillation tower (theoretical plate number is 35) that is 30 millimeters in diameter and 600 millimeters high with ceramic Raschig rings as packing. First in the catalytic distillation tower, the filling height is the first adsorbent that is furnished with 0.1% benzoyl peroxide activator at 100 millimeters, then the tower still temperature is raised to 70 ℃, from the stripping section of the adsorption distillation tower by the rate of 80g / h The speed is to pump MTBE into the adsorption distillation tower through the metering pump, and the MTBE feed temperature is 80°C;

[0020] The adsorbent formamide is pumped into the adsorption distillation tower from the top of the tower by the metering pump at a speed of 40g / h, and the temperature at the top of the tower is maintained at 60°C; The adsorbent is pumped into the lower part of the adsorbent regeneration tower, and the temperature of the adsorbent regeneration towe...

Embodiment 2

[0022] MTBE desulfurization is carried out in an adsorption distillation tower (35 theoretical plates) with a diameter of 30 mm and a height of 600 mm and ceramic Raschig rings as fillers. First in the catalytic distillation tower, the filling height is the second adsorbent that is equipped with 0.3% methyl ethyl ketone peroxide activator, then the temperature of the tower bottom is raised to 80 ° C, and the stripping section of the adsorption distillation tower is passed through at a speed of 80 g / h The metering pump pumps MTBE into the adsorption distillation tower, and the MTBE feed temperature is 90°C; the second adsorbent is pumped into the adsorption distillation tower from the top of the tower through the metering pump at a speed of 60g / h, and the temperature at the top of the tower is maintained at 55°C; Pump the sulfur-containing adsorbent into the lower part of the adsorbent regeneration tower through the metering pump at a rate of 60g / h in the distillation column, an...

Embodiment 3

[0024] MTBE desulfurization is carried out in an adsorption distillation tower (35 theoretical plates) with a diameter of 30 mm and a height of 600 mm and ceramic Raschig rings as fillers. At first in the catalytic distillation tower, the filling height is the acetone adsorbent that is equipped with 0.2% cyclohexanone peroxide activator at 100 millimeters, then the tower still temperature is raised to 85 ℃, from the stripping section of the adsorption distillation tower by the rate of 90g / h The speed is to pump MTBE into the adsorption distillation tower through the metering pump, and the MTBE feed temperature is 85°C; the propane adsorbent is pumped into the adsorption distillation tower from the top of the tower through the metering pump at a speed of 70g / h, and the temperature at the top of the tower is maintained at 65°C; The sulfur-containing adsorbent is pumped into the lower part of the adsorbent regeneration tower through the metering pump at a rate of 70g / h from the to...

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Abstract

The invention provides a technology for removing sulfides in MTBE by adsorptive distillation. The technology is characterized in that a substance with a boiling point higher than that of MTBE and relatively high absorptive selectivity upon thioether, mercaptan, disulfide and thiophene is adopted as an adsorbent; under certain temperature and technologcial conditions, sulfides in MTBE are selectively absorbed by the adsorbent; and the sulfur-containing adsorbent is regenerated and recycled with a vacuum distillation method, and sulfides are recovered, such that sulfides in MTBE are removed and recycled. With the technology, the content of sulfides in MTBE can be reduced from 600-800ug/g to below 20ug/g, and MTBE target product yield is greater than 99.8%.

Description

technical field [0001] The invention belongs to the field of petrochemical technology. The invention relates to a technology for removing sulfides in MTBE, and specifically provides a method for removing sulfides in MTBE by adsorption distillation. Background technique [0002] MTBE (methyl tert-butyl ether) is the addition reaction product of isobutene and methanol in liquefied petroleum gas (C4 fraction). MTBE is not only a high-octane clean gasoline blending component, but also a raw material for cracking to produce high-purity isobutene. It is an important petrochemical raw material and product. [0003] With the development of heavy and inferior crude oil and the deepening requirements for comprehensive utilization of resources, the sulfur content in catalytic cracking and coking carbon four fractions is gradually increasing. While the C4 fraction reacts with methanol to produce MTBE, sulfur-containing compounds such as mercaptans in the C4 fraction react with butene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/36C07C41/42
Inventor 姚志龙曹开喜朱永凯孙培永段月欣毛进池高永林黄崇平
Owner 九江齐鑫化工有限公司
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