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Method for analyzing distribution of sulfur in methyl tert-butyl ether, sulfide qualitative analysis database, and use of database

A technology for qualitative analysis of methyl tert-butyl ether, applied in the field of analytical chemistry, can solve problems that have not yet been reported in the literature

Active Publication Date: 2015-07-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, there are no literature reports on the analysis of various sulfide contents in methyl tert-butyl ether products, especially the analysis of sulfur distribution in methyl tert-butyl ether products by gas chromatography / sulfur chemiluminescence detection technology.

Method used

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  • Method for analyzing distribution of sulfur in methyl tert-butyl ether, sulfide qualitative analysis database, and use of database
  • Method for analyzing distribution of sulfur in methyl tert-butyl ether, sulfide qualitative analysis database, and use of database
  • Method for analyzing distribution of sulfur in methyl tert-butyl ether, sulfide qualitative analysis database, and use of database

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0207] Sample to be tested: MTBE products at the production site of Jiujiang Petrochemical on October 10, 2012

[0208] Analysis conditions:

[0209] Chromatographic column: non-polar quartz capillary column, 50m×0.2mm×0.5μm

[0210] Carrier gas: high purity helium,

[0211] Head pressure: 150kPa,

[0212] Column flow: 0.6mL / min, constant sulfur analysis,

[0213] Injection port temperature: 230°C,

[0214] Injection volume: 1μL,

[0215] Split ratio: 200:1,

[0216] Column temperature: the initial temperature is 35°C, the first-stage temperature rise rate is 3°C / min, the first-stage final temperature is 90°C, the second-stage temperature rise rate is 20°C / min, the second-stage final temperature is 250°C, and kept for 10 minutes.

[0217] SCD detector pressure: 7Torr,

[0218] Burner temperature: 800°C,

[0219] Hydrogen: 40mL / min, Air: 60mL / min,

[0220] Background noise: 1.0mV.

[0221] Qualitative and quantitative analysis:

[0222] The methyl tert-butyl ether pr...

Embodiment 2

[0229] According to the MTBE product sulfur quantitative analysis condition of embodiment 1, adopting sulfur content is the diethyl disulfide external standard sample of 150mg / L to determine the quantitative response factor, regularly analyzed the production site MTBE product. See Table 15 for the sulfur distribution analysis report of MTBE products at the production site on August 20, 2012. Among them, the sulfide whose structure is not determined has a sulfur content of 0.63% of the total sulfur.

[0230] Table 15 2012.08.20 MTBE product sulfur distribution analysis report

[0231]

[0232]

Embodiment 3

[0234] According to the MTBE product sulfur quantitative analysis conditions of Example 1, the external standard sample of ethyl methyl sulfide with a sulfur content of 30 mg / L was used to determine the quantitative response factor, and the production site MTBE product was regularly analyzed. See Table 16 for the sulfur distribution analysis report of MTBE products at the production site on October 20, 2012. Among them, the sulfide whose structure is not determined has a sulfur content of 0.82% of the total sulfur.

[0235] Table 16 2012.10.20 MTBE product sulfur distribution analysis report

[0236]

[0237]

[0238] In a word, the method for qualitative / quantitative analysis of sulfur distribution in methyl tert-butyl ether products established by the present invention using gas chromatography / sulfur chemiluminescence detector can identify formazan at one time by relying on the sulfide qualitative analysis database described in the present invention Most of the sulfur...

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Abstract

The invention provides a method for qualitatively / quantitatively analyzing distribution of sulfur in a methyl tert-butyl ether product through using a gas chromatography / sulfur chemiluminescence detector. The qualitative / quantitative analysis method can be used to identify most sulfur compounds with different structure types in the methyl tert-butyl ether product and quantitatively analyze all sulfides in order to make real time adoption of a suitable desulphurization means in the production field convenient and guarantee the quality of the product. The invention also provides a sulfide qualitative analysis database based on the gas chromatography / sulfur chemiluminescence detector, and an application thereof.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to an analysis method for analyzing sulfur distribution in methyl tert-butyl ether products by using gas chromatography. Background technique [0002] Methyl tert-butyl ether (MTBE) is an ideal blending component for the production of unleaded, high-octane, oxygenated gasoline, and has been widely used as a gasoline additive all over the world. It can not only effectively increase the octane number of gasoline, but also improve the performance of automobiles, reduce the CO content in exhaust gas, and reduce the production cost of gasoline at the same time. [0003] Generally, the reaction of isobutene and methanol in liquid hydrocarbons is used to generate methyl tert-butyl ether products, although the purity can reach 99%. However, the sulfur content is relatively high, generally close to 0.05% (mass percentage), and sometimes as high as 0.18% (mass percentage). At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G06F17/30
Inventor 赵惠菊陈齐全王忠罗光邹庐荣万义芳贾咏梅蔡伟
Owner CHINA PETROLEUM & CHEM CORP
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