Apparatus and process for monitor and control of ammoxiation reactor with fourier transform infrared spectrometer

A technology of infrared spectroscopy and reactors, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of not being able to provide at the same time, and achieve the effects of control improvement, real-time analysis and process control

Inactive Publication Date: 2002-04-17
O&D美国公司
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Problems solved by technology

The performance of the recovery test takes at least several hours, therefore, it cannot be provided at the same time
Therefore, the recovery test can only provide ex post information as an operating parameter for the ammoxidation reaction

Method used

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  • Apparatus and process for monitor and control of ammoxiation reactor with fourier transform infrared spectrometer
  • Apparatus and process for monitor and control of ammoxiation reactor with fourier transform infrared spectrometer
  • Apparatus and process for monitor and control of ammoxiation reactor with fourier transform infrared spectrometer

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Embodiment Construction

[0021] Fourier transform infrared (FT-IR) spectroscopy uses energy in the form of infrared (IR) radiation, which lies between the visible and microwave regions of the electromagnetic spectrum. figure 1 is a schematic diagram of the optics of an FT-IR spectrometer 1, for example for obtaining an IR spectrum of the combined effluent of an acrylonitrile reactor in accordance with the present invention. In one embodiment, figure 1 The FT-IR spectrometer shown schematically illustrates a BOMEM Michelson FT-IR spectrometer incorporating a Michelson interferometer. In the FT-IR spectrometer, a sample to be analyzed is placed in or passed through an FT-IR sample cell 2, which is specially designed to transmit light at infrared wavelengths. IR radiation emitted by a broad-spectrum infrared source passes through the sample cell 2 and travels to a sensitive IR detector 4 . The IR radiation emitted from the light source 3 is split by the interferometer 5 so that the IR radiation follows...

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Abstract

The present invention is a method and an apparatus for identifying and quantifying components in an effluent stream from an ammoxidation reactor, the apparatus comprising a microprocessor; and a Fourier Transform infrared spectrometer having a sample cell through which may flow a portion of the effluent stream, an infrared source to emit infrared radiation and pass the infrared radiation through the effluent stream, an infrared detector to detect transmitted infrared radiation at the selected infrared wavelengths and to generate absorbance data due to absorbance of the infrared radiation by the components, wherein each of the components absorbs infrared radiation at one or more of the infrared wavelengths, and an output apparatus to provide the absorbance data to the microprocessor; wherein the microprocessor is programmed to identify and quantify each of the plurality of components based upon the absorbance data and calibration data, the calibration data being obtained from recovery run analyses and calibration analyses in the sample cell. The method may be applied to utilize the apparatus to provide real-time control of the operation of an ammoxidation reactor, based on the analytical results obtained by the FT-IR spectrometer and the calibration model developed therefor.

Description

[0001] Technical Field of the Invention [0002] The present invention relates to the identification and quantification of various components in the effluent of an ammoxidation reactor by means of Fourier transform infrared (FT-IR) spectrometry and the use of the information obtained by this method for the control and optimization of the ammoxidation reaction . Background of the invention [0003] The present invention applies to the ammoxidation of propylene and propane to produce acrylonitrile, and generally to the ammoxidation of olefins, alkanes, and other starting materials to produce the corresponding nitriles. This reaction is well known and described, for example, in USP 3,642,930 (alkenes) or USP 4,897,504 (alkanes), the disclosures of which are incorporated herein by reference. Generally, the ammoxidation reaction is carried out by contacting the reactants olefin or alkane (or other starting materials), oxygen and ammonia in the gas phase with a special ammoxidation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35
CPCG01N2021/3595G01N21/3504Y10T436/11Y10T436/117497Y10T436/12
Inventor 赫克特·L·卡萨尔纳扎尼恩·阿斯科迈克尔·J·西利琳达·L·尼罗让·A·鲍德温
Owner O&D美国公司
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