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Method for in-line continuous detection of polymerization rate for polymerizing reaction of vinyl acetate

A vinyl acetate, polymerization technology, applied in the direction of analytical materials, instruments, etc., can solve the problems of high cost and time lag, and achieve the effect of low price, small lag time, stable and reliable performance

Inactive Publication Date: 2004-10-06
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

There are very few manufacturers to infer the polymerization rate of the polymerization reaction through material balance calculation according to the feed and the flow rate of different generated materials. Higher requirements, which are usually difficult to achieve, or the cost is too high; (2) The measurement point for the flow rate of the reaction product must be set at the outlet of the monomer removal tower, and there is still a gap between the material entering the polymerization reaction and the measurement point. large time lag

Method used

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  • Method for in-line continuous detection of polymerization rate for polymerizing reaction of vinyl acetate
  • Method for in-line continuous detection of polymerization rate for polymerizing reaction of vinyl acetate

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Embodiment Construction

[0034] How to implement the present invention will be described in detail below through an application example.

[0035] The process parameters and other parameters are: methanol ratio S is 15-20%; the polymerization rate range is 50% to 60%; the temperature range of the material in the polymerization tank is 55°C to 70°C; the ambient temperature range is -20°C to 45°C.

[0036] System configuration and installation such as figure 1 . The distance between the two pressure measuring points is 1300mm, wherein the bottom pressure measuring point is 200mm from the cylindrical lower end of the polymerization kettle along the line. The differential pressure signal is measured by a double-flange differential pressure transmitter, and the ambient temperature and material temperature are respectively measured by an ambient temperature transmitter and a material temperature transmitter. The above-mentioned measured differential pressure signal, ambient temperature signal, material te...

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Abstract

A method for in-line continuous detection of polymerizing rate in the polymerizing reaction of vinyl acetate incldues measuring pressure difference signal by two pressure-measuring points on the polymerizing reactor, measuring the temp. of material in the reactor, and measuring the ambient temp., and calculating the polymerizing rate according to the said three signals and the methanol ratio. Its advantage is high precision.

Description

Technical field: [0001] The invention relates to an on-line continuous detection method for the polymerization rate of vinyl acetate polymerization, which is used for parameter detection in process industries such as chemical industry, macromolecule and plastics. Background technique: [0002] Industrial process automation is the basic condition and important guarantee for safe, stable, high-efficiency, high-quality and low-consumption production. In order to effectively control the production process, an important prerequisite is to obtain information about the controlled variables. For the specific production process, most of the process parameters that really want to be controlled are concentration, density, polymerization rate, yield, naphtha dry point, light oil pour point, yield distribution, etc., which directly reflect the condition of the device and the quality of the product. "Quality parameters". However, the detection of these quality parameters is very difficul...

Claims

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Application Information

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IPC IPC(8): G01N35/00
Inventor 王豪
Owner SHANGHAI JIAO TONG UNIV
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