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Method and device for monitoring glycolonitrile preparation technology in real time

A technology for the preparation process of hydroxyacetonitrile, which is applied in the field of real-time online monitoring of the preparation process of hydroxyacetonitrile, can solve the problems of long time consumption, high sample toxicity, environmental pollution, etc., and achieve the effect of short time consumption and fast analysis speed

Inactive Publication Date: 2010-12-29
FOCUSED PHOTONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Time-consuming and slow analysis speed
[0005] The reaction time of the hydroxyacetonitrile preparation process is 2-3 hours. Usually, it takes about 1 hour for laboratory personnel to analyze a sample, mainly analyzing parameters such as formaldehyde and hydroxyacetonitrile in the reaction process; it takes a long time and the analysis speed is slow, which cannot meet the requirements of rapid Detect requirements such as production process control;
[0006] 2. The analysis result has a large human factor
[0007] The traditional analysis method adopts the laboratory manual test method, which needs to be equipped with multiple laboratory analysts, and different analysts will have large differences in the analysis results of the samples;
[0009] The traditional analysis process requires the use of chemical reagents, which causes environmental pollution; at the same time, the samples are highly toxic and endanger personal safety

Method used

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  • Method and device for monitoring glycolonitrile preparation technology in real time
  • Method and device for monitoring glycolonitrile preparation technology in real time
  • Method and device for monitoring glycolonitrile preparation technology in real time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see figure 1 , one A device for real-time monitoring of the preparation process of hydroxyacetonitrile, comprising: a light source 51, a light receiving unit 52 and a processing module 53;

[0052] A pair of optical fibers are installed on both sides of the sample pipe 1 through flanges, the light source 51 and the light receiving unit 52 are respectively connected to one of the optical fibers, and the two optical fibers face each other, so that the light emitted by the light source 51 passes through the optical fiber and then passes through the optical fiber. The sample in the sample pipeline 1 can be received by the light receiving unit 52;

[0053] In this embodiment, the light source 51 is a tungsten halogen lamp with a spectral range of 300-2500 nm; the light receiving unit 52 includes a light splitting device and a photoelectric converter; the light splitting device is a grating light splitting device;

[0054] The light emitted by the light source 51 is transm...

Embodiment 2

[0068] see figure 2 , image 3 , a device for real-time monitoring of the preparation process of hydroxyacetonitrile, which is different from the device described in Example 1 in that: the device also includes a pretreatment unit 3;

[0069] In this embodiment, the defoaming module and the filtering module in the pretreatment unit 3 are filter screens of the same component, which are arranged inside the sample pipeline 1 to remove air bubbles and solid impurities in the sample in the sample pipeline 1;

[0070] At the same time, the position where the optical fiber pair is installed on the sample pipeline 1 is close to the position below the corresponding position of the preprocessing unit 3 on the sample pipeline 1, so that the spectrum of the pretreated sample is collected;

[0071] The corresponding device when establishing the analysis model in the processing module 53, compared with the above-mentioned device for real-time monitoring of the preparation process of hydrox...

Embodiment 3

[0097] see Figure 6 , a device for real-time monitoring of the hydroxyacetonitrile preparation process is different from the corresponding device when establishing an analytical model described in Example 2:

[0098] The device for real-time monitoring also includes a sample pool 4; the sample pool 4 is connected to the sampling unit 2 through the input port 41;

[0099] Described light source 51 and light-receiving unit 52 are respectively arranged at the two ends of sample cell 4, so that the light that light source 51 sends is received by the spectroscopic device in the light-receiving unit 52 after passing through the sample in the sample cell 4, and in the light-receiving unit 52 The photoelectric converter converts the optical signal received by the spectroscopic device into an electrical signal, and then transmits the electrical signal to the processing module 53, and the processing module 53 analyzes the electrical signal, and analyzes the formaldehyde in the sample a...

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Abstract

The invention relates to a method for monitoring a glycolonitrile preparation technology process in real time, comprising the following steps: a. selecting a group of samples and collecting a spectrum, wherein the spectrum scanning range is 400-2500 nm; building an analysis model by utilizing the content of sample component and the corresponding spectrum; b. collecting the spectrum of an unknown sample in the glycolonitrile preparation process, and inputting the spectrum into the analysis model; and determining the content of the unknown sample component. The invention also provides a device for monitoring the glycolonitrile preparation technology in real time. The invention has the advantages of quickness, instantaneity, simple operation, no pollution, high analysis accuracy and the like.

Description

technical field [0001] The invention relates to the monitoring of the preparation process of hydroxyacetonitrile, in particular to a method and device for real-time on-line monitoring of the preparation process of hydroxyacetonitrile. Background technique [0002] The on-line analysis device for the preparation of hydroxyacetonitrile is a system for monitoring the preparation process of hydroxyacetonitrile. At present, the main means of monitoring the preparation process of hydroxyacetonitrile is to use manual assay methods to detect the formaldehyde content in the reaction process, which is used as the judgment condition for the termination of the reaction. [0003] The traditional method can monitor the preparation process of hydroxyacetonitrile, but there are still the following deficiencies: [0004] 1. Time-consuming and slow analysis speed [0005] The reaction time of the hydroxyacetonitrile preparation process is 2-3 hours. Usually, it takes about 1 hour for labora...

Claims

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Application Information

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IPC IPC(8): G01N21/25C07C255/12C07C253/00
Inventor 冯红年吴继明叶华俊陈英斌
Owner FOCUSED PHOTONICS
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