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Liquid chromatography method for determining carbonyl compound content in methylrhenium trioxide (MTO) aqueous product

A technology of carbonyl compounds and liquid chromatography, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of not being able to provide the type of carbonyl compounds and the content of monomer components, and achieve a good linear relationship, high sensitivity, and accurate quantification Effect

Inactive Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing methods for measuring the content of carbonyl compounds cannot provide the specific type of carbonyl compounds and the content of monomer components, and a new liquid phase for measuring the content of carbonyl compounds in the MTO water phase product is provided. Chromatographic method

Method used

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  • Liquid chromatography method for determining carbonyl compound content in methylrhenium trioxide (MTO) aqueous product
  • Liquid chromatography method for determining carbonyl compound content in methylrhenium trioxide (MTO) aqueous product
  • Liquid chromatography method for determining carbonyl compound content in methylrhenium trioxide (MTO) aqueous product

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Embodiment 1

[0013] According to the analysis steps of the content of the invention, a series of standard samples containing formaldehyde and acetaldehyde are analyzed, (a) preparing formaldehyde, acetaldehyde and acetone series standard solutions. First calibrate the content of formaldehyde solution (~37% aqueous solution) according to the method specified in GB / T 9009-1998, then weigh about 100μL of formaldehyde solution, place it in a 50mL volumetric flask, then dilute with water to the mark, and shake well. Use a pipette to accurately draw 1.00 mL of the solution into a 100 mL volumetric flask, then dilute to the mark with water, shake well for later use, and calculate the formaldehyde content of the standard solution, expressed in μg / mL. Pipette 1.00mL, 2.00mL, 3.00mL, 4.00mL and 5.00mL of formaldehyde standard solutions into 25mL volumetric flasks respectively; prepare a series of standard solutions of acetaldehyde and acetone; (b) prepare 2,4-dinitrophenylhydrazine Derivatizer. Wei...

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Abstract

The invention relates to a liquid chromatography method for determining the carbonyl compound content in a methylrhenium trioxide (MTO) aqueous product, which mainly solves the problems that in the existing methods, the specific type of a carbonyl compound and the content of monomer components cannot be provided. The liquid chromatography method for determining the carbonyl compound content in the MTO aqueous product comprises the following steps that: (a) formaldehyde, acetaldehyde and acetone series of standard solution is prepared; (b) 2,4-dinitrophenylhydrazine derivation agent is prepared; (c) 2,4-dinitrophenylhydrazine is used for carrying out derivative reaction to the formaldehyde, acetaldehyde and acetone series of standard solution; (d) a hydrazone derivative which is produced in the derivative reaction is separated and determined through a high-efficiency liquid chromatography method; (e) the calibration curves of formaldehyde, acetaldehyde and pyruvate carbonyl compounds are drawn; (f) the derivative reaction is carried out and analysis is conducted to a sample to be determined; and (g) the technical scheme in which the carbonyl compound in the sample is qualitatively and quantitatively calculated can better solve the problem, and the method can be used in the industrial production in which the carbonyl compound content in the MTO aqueous product is determined.

Description

technical field [0001] The invention relates to a liquid chromatography method for measuring the content of carbonyl compounds in MTO water phase products. Background technique [0002] Light olefins such as ethylene and propylene are basic organic raw materials in the modern chemical industry, and the traditional process route for producing ethylene and propylene is naphtha cracking. New methods for preparing low-carbon olefins such as ethylene and propylene from coal or natural gas via methanol, such as Methanol to Olefins (MTO) and Methanol to Propylene (MTP), are the most promising new processes to replace petroleum routes And it is moving towards industrialization. The main products of methanol to olefins (MTO) and methanol to propylene (MTP) are olefins, but at the same time, a large amount of water and some low-carbon oxygenated compounds such as aldehydes, ketones, alcohols, ethers, and acids are also produced as by-products. These low-carbon oxygen-containing comp...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/89
Inventor 庄海青李继文王川
Owner CHINA PETROLEUM & CHEM CORP
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