Online detection method for content of HMX in HMX production process

A technology of Oktokin and production technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of quality information distortion, long test cycle, lagging analysis results, etc., achieve accurate online detection, high accuracy, and overcome time constraints Lag effect

Inactive Publication Date: 2013-12-11
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, liquid chromatography is used to detect the above process and products, but liquid chromatography requires pretreatment of the analyte, the test c

Method used

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  • Online detection method for content of HMX in HMX production process
  • Online detection method for content of HMX in HMX production process
  • Online detection method for content of HMX in HMX production process

Examples

Experimental program
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Embodiment 1

[0095] This embodiment provides an online detection method for Octogen content in the Octogen production process, the method comprising the following steps:

[0096] Step 1, determine the Octogen content of the sample:

[0097]Collect the samples in the mixing process of synthesizing Octogen with a sampling time interval of 30 seconds and collect 18 samples; collect the samples in the nitration process of synthesizing Octogen with a sampling interval of 40 seconds and collect 18 samples; The sample sampling time interval during the pyrolysis process of collecting synthetic Octogen was 30 seconds, and 18 samples were collected; each sample was pretreated, and the specific pretreatment method was: from the reaction system (mixing process, nitrification process and The reaction system of the pyrolysis process) sampled 1 ml, added to a 250 ml beaker containing 20 g of ice-water mixture, and added 100 ml of ethanol; the pH value of the sample was adjusted to 2-8 by adding ammonia w...

Embodiment 2

[0126] This embodiment provides an online detection method for Octogen content in the Octogen production process, the method comprising the following steps:

[0127]The method of step 1, step 2 and step 3 in the present embodiment is the same as the method of step 1, step 2 and step 3 in embodiment 1, obtains 54 near-infrared spectra of the sample, and records them as original spectra, and obtains the most best modeling interval.

[0128] Step 4, preprocessing of the original spectrum:

[0129] The standard normal variable transformation is performed on the collected original spectrum to obtain the near-infrared spectrum after the standard normal variable transformation. The standard normal variable transformation is used to eliminate the influence of solid particle size, surface scattering and optical path changes on the near-infrared diffuse reflection spectrum The standard normal variable transformation can be replaced by multivariate scattering correction to obtain the ne...

Embodiment 3

[0138] This embodiment provides an online detection method for Octogen content in the Octogen production process, the method comprising the following steps:

[0139] The method of step 1, step 2 and step 3 in the present embodiment is the same as the method of step 1, step 2 and step 3 in embodiment 1, obtains 54 near-infrared spectra of the sample, and records them as original spectra, and obtains the most best modeling interval.

[0140] Step 4, preprocessing of the original spectrum:

[0141] Carry out any combination of smoothing, differential processing, standard normal variable transformation and multivariate scattering correction to the original spectrum, and the specific smoothing, differential processing, standard normal variable transformation and multivariate scattering correction processing methods are the same as in Example 1 and implementation The processing method in Example 2 is the same, and the near-infrared spectrum after any combination of smoothing proces...

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Abstract

The invention discloses an online detection method for content of HMX in HMX production process. The key quality parameters in the technical process of production mean HMX content in a mixing process, a nitrifying process and a pyrolysis process. The method includes the steps of acquiring a near infrared spectrum of a reaction process system, correlating HMX content data acquired by a liquid chromatogram with the near infrared spectrum, and establishing a calibration model with a partial least squares regression method to realize online detection on the HMX content in the reaction process. The established near infrared spectrum is applied to online detection on the HMX content in the reaction process. The online detection method can be used for obtaining HMX content information in the system in real time, guiding and optimizing the production technology, ensuring product quality, improving the production automation and continuity level and providing technical support for man-machine isolation at a dangerous point.

Description

technical field [0001] The invention belongs to the field of explosives and relates to octogen, in particular to an on-line detection method for octogen in the octogen production process. Background technique [0002] Octojin (abbreviated as HMX) is the explosive with the best comprehensive performance. It is widely used in mixed explosives, solid propellants and aerospace technology. Real-time monitoring of important quality parameters of key reaction units in the HMX production process, timely acquisition of quality information, real-time optimization and adjustment of production processes are of great significance to ensure product quality and production safety, and are continuous and automated technical support. [0003] The urea synthesis HMX process has the characteristics of low cost and high yield, and has broad prospects for popularization and application. The existing online monitoring methods of this process line only monitor process parameters such as temperature...

Claims

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Application Information

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IPC IPC(8): G01N21/35
Inventor 张皋蒋忠亮苏鹏飞陈智群潘清
Owner XIAN MODERN CHEM RES INST
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