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On-line analysis system and on-line measurement method

An analysis system and quantitative tube technology, applied in the field of analysis of reaction products of complex oxidation reactions, can solve problems such as inability to quantify water, inability to obtain content, ineffective connection, etc.

Inactive Publication Date: 2013-05-29
SHANGHAI HUAYI ACRYLIC-ACID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after analyzing the organic oxidation products and inorganic oxidation products separately, only the content of each substance in their respective systems can be obtained.
The two samples cannot be effectively linked, nor can the content of each substance in the real oxidation product be obtained
In addition, this method has problems in the analysis of water in the product, and it cannot accurately quantify the water, so as to obtain the composition ratio of each substance in the reaction product
Therefore, it is difficult to complete the analysis of all substances in the oxidation reaction products

Method used

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  • On-line analysis system and on-line measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] This embodiment adopts Figure 1 ~ Figure 3 The shown measurement system and valve switching method are used for on-line measurement of the reaction process of the two-step oxidation of propylene to acrylic acid.

[0081] a) Preparation of standard gas

[0082] According to the rough determination of the sample to be analyzed, prepare the standard gas according to the following composition:

[0083] Substance name

[0084] b) Determine the switching time of each valve

[0085] use figure 1 The shown online analysis system of the present invention analyzes the standard gas, using helium as the carrier gas. The system includes: sample inlet and outlet, three carrier gas paths, four chromatographic columns, a thermal conductivity detector and a hydrogen flame ionization detector, and its connections are as follows:

[0086] The six-way valve 10 communicates with the chromatographic column 8, the damping column 9, the chromatographic column 11 and the thermal ...

Embodiment 2

[0103] This embodiment adopts Figure 1 ~ Figure 3 The measurement system and valve switching method shown are for on-line measurement of the two-step oxidation of isobutene to methacrylic acid.

[0104] a) Preparation of standard gas

[0105] According to the rough determination of the sample to be analyzed, prepare the standard gas according to the following composition:

[0106] Substance name

CO

CO 2

O 2

N 2

Acrylic

propane

water

Acetaldehyde

Content, %

2.33

3.51

1.23

90.03

1.46

1.05

0.26

0.13

[0107] b) Determine the switching time of each valve

[0108] use figure 1 The shown online analysis system of the present invention analyzes the standard gas, using helium as the carrier gas. The system includes: sample inlet and outlet, three carrier gas paths, four chromatographic columns, a thermal conductivity detector and a hydrogen flame ionization detector, and ...

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Abstract

The invention discloses an on-line analysis system and a method for performing on-line measurement by using the system. The analysis system comprises a ten-way valve (5) which is provided with at least ten interfaces, two six-way valves (10, 17) which are provided with at least six interfaces respectively, four chromatographic columns (7, 8, 11, 20), quantitative tubes (4, 15), a thermal conductivity detector (14) and a flame ionization detector (21).

Description

technical field [0001] The invention relates to an online analysis system, which is especially suitable for analyzing the reaction products of complex oxidation reactions. The on-line analysis system of the present invention can accurately and quantitatively analyze all organic substances, inorganic gases and water after one sample injection. The online analysis system of the present invention has the characteristics of fast and accurate analysis, is suitable for the complete analysis of complex oxidation reaction product systems, and is therefore especially suitable for monitoring chemical reaction processes in chemical production. technical background [0002] In many chemical production processes, timely mastering of relevant reaction indicators is one of the keys to controlling the entire process. At the same time, the material composition of the reaction product is very important data for process adjustment and device start-up. Therefore, the reaction product must be a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 成启刚袁海英庄岩
Owner SHANGHAI HUAYI ACRYLIC-ACID CO LTD
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