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Method for producing low-sulfur methyl tertiary butyl ether

A production method and technology of sulfur content, applied in ether preparation, ether separation/purification, organic chemistry, etc., can solve the problems of high difficulty and high cost

Active Publication Date: 2012-06-13
HEBEI REFINING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult and expensive to achieve such precise desulfurization requirements in industry.

Method used

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  • Method for producing low-sulfur methyl tertiary butyl ether
  • Method for producing low-sulfur methyl tertiary butyl ether
  • Method for producing low-sulfur methyl tertiary butyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Combine below figure 1 Describe preferred extractive distillation embodiment of the present invention, flow process is as follows:

[0031]In the device that produces MTBE with refining carbon four as raw material, the MTBE re-distillation part is added. The raw material MTBE is directly sent to the rectification part from the bottom of the catalytic distillation tower. The raw material MTBE is first mixed with the solvent for extracting sulfur. There are two sources of sulfur pumping solvent, one is supplementary fresh solvent, the other is regenerated circulating solvent, one can be used alone, or both can be used at the same time. Generally, the fresh solvent is injected before the feed heater, and the regenerated circulating solvent is injected after the feed heater; the amount of sulfur extraction solvent is mainly related to the sulfur content of the feed MTBE, and the higher the sulfur, the greater the injection amount. , generally less than 20% (v) of the amo...

Embodiment 2

[0035] The following combination figure 2 Describe the direct distillation embodiment in the inventive method, flow process is as follows:

[0036] In the device that produces MTBE with refining carbon four as raw material, the MTBE re-distillation part is added. The raw material MTBE is directly sent to the rectification part from the bottom of the catalytic distillation tower. The raw material MTBE can directly enter the rectification tower 2, or it can be fed into the heater 1 first, and about 80% of the MTBE can be vaporized by heating, and the outlet temperature is 120-140°C. Heater 1 selects the fuel heating furnace for use. The vapor-liquid mixture from the heater enters the middle part of the rectification column 2 . The upper part of the tower is the MTBE rectification section. The temperature at the top of the rectification tower 2 is between 100 and 120 ° C, and the top pressure is selected within the range of 0.3 to 0.5 MPa (table). The low-sulfur MTBE vapor ph...

Embodiment 3

[0039] The following combination image 3 Describe the batch distillation embodiment in the inventive method, flow process is as follows:

[0040] The raw material MTBE can come directly from the bottom of the catalytic distillation tower, or can be sent from the tank area to the rectification part. The raw material MTBE directly enters the bottom of the rectifying tower 2. The reboiler 4 at the bottom of the tower is heated to gradually vaporize the MTBE, and returns to the bottom of the rectification tower 2 to provide vapor phase load for rectification. The reboiler 4 selects a heat conduction oil medium heater. The towers are all MTBE rectification sections. The temperature at the top of rectification tower 2 is between 50 and 65°C, and the top pressure is selected within the range of 0 to 0.05 MPa (table). High-purity MTBE vapor phase products go out from the top of rectification tower 2. Enter the product condenser 3, condense and cool to 45°C, and all become liquid p...

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Abstract

The invention provides a method for producing low-sulfur methyl tertiary butyl ether (MTBE), which is used for producing low-sulfur MTBE products by re-rectifying MTBE containing sulfur. The method can use the MTBE with 10-150 ppm of sulfur content as a raw material to produce the MTBE products with containing sulfur content less than 10 ppm or even less than 5 ppm, and can use the MTBE with sulfur content more than150 ppm to produce the MTBE products with sulfur content less than 150 ppm. Especially, produced MTBE with the sulfur content less than 10 ppm or even less than 5 ppm can not only meet blend requirements of state V clean gasoline, but also requirements of industrial chemical raw materials can be met.

Description

technical field [0001] The invention belongs to a method for producing low-sulfur MTBE products by using sulfur-containing refining MTBE as a raw material. Background technique [0002] Methyl tert-butyl ether is referred to as MTBE, and its structural formula is CH 3 -O-C(CH 3 ) 3 , formula C 5 h 12 O, with a molecular weight of 88.15 and a boiling point of 55.3°C, is formed by the addition reaction of methanol and isobutylene under the action of an acidic catalyst. A small amount of MTBE is used as a chemical raw material, mainly as a blending component of high-octane clean gasoline. In the industry, the mixed carbon four components of oil refining or chemical liquefied gas are mainly used as raw materials, and methanol is used to produce MTBE products. Due to the certain sulfur content in the refining C4 component, the sulfur content of MTBE products produced from the refining C4 as raw material is relatively high, generally as low as 100-200ppm, and as high as 2000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/42
Inventor 郝天臻郝天君王桂花
Owner HEBEI REFINING TECH CO LTD
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