Separation of Methyl Chloride and Ethyl Chloride by Throttle Expansion
A throttling expansion and methyl chloride technology, which is applied in the disproportionation separation/purification of halogenated hydrocarbons, chemical instruments and methods, and the preparation of halogenated hydrocarbons, can solve the problems of large discharge of three wastes, low product purity, and complicated processes. Achieve the effect of reducing separation cost, short process flow and simple operation
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Embodiment 1
[0025] Example 1: Take 100 kg of mixed gas raw material of methyl chloride and ethyl chloride for separation. The molar ratio of ethyl chloride to methyl chloride (based on methyl chloride-the following is abbreviated) is measured to be 0.001, and the raw materials enter the cooling and cooling device to be cooled to 0°C; the cooled mixture raw materials are sent to the first stage through the compressor Flow expansion device-sieve plate throttling expander (see figure 2 -The following is omitted), the cross-sectional area of the selected sieve is 0.03 cm 2 The sieve plate 1 (the icon number is omitted below), the blind plate 2 (the icon number is omitted) is adjusted by the blind plate shift handle 3 (the icon number is omitted) to overlap the area covered by the sieve plate to control the flow in and out of the sieve plate. The pressure difference of the device is 0.1 MPa, and the collected liquid ethyl chloride is 0.12 kg and the gaseous methyl chloride is 98.1 kg. The yi...
Embodiment 2
[0026] Embodiment 2: Take 100 kg of mixed gas raw materials of methyl chloride and ethyl chloride for separation. It is determined that the molar ratio of ethyl chloride to methyl chloride is 0.01, and the raw material enters the cooling device to cool down to 5°C; the cooled mixture raw material is sent to the first-stage throttling expansion device-sieve plate throttling expander through the compressor , The cross-sectional area of the selected sieve is 0.5cm 2 The sieve plate is adjusted by the blind plate shift handle to adjust the area of the blind plate superimposed on the sieve plate, and the pressure difference between the fluid entering and leaving the sieve plate throttling expander is controlled to be 0.4 MPa. The collected liquid ethyl chloride and gaseous chlorine are 1.19 kg Methane was 96.9 kg, and the yields of the two were 94.4% and 98.1%, respectively; after testing, the purity of liquid ethyl chloride and gaseous methyl chloride were 99.9% and 99.8%, respe...
Embodiment 3
[0027] Embodiment 3: Take 100 kg of mixed gas raw material of methyl chloride and ethyl chloride for separation. It is determined that the molar ratio of ethyl chloride to methyl chloride is 0.1, and the raw material enters the cooling and cooling device to be cooled to 10°C; the cooled mixture raw material is sent to the first-stage throttling expansion device-sieve plate throttling expander through the compressor , The cross-sectional area of the selected sieve is 3 cm 2 The sieve plate is adjusted by the blind plate shift handle to adjust the area of the blind plate superimposed on the sieve plate, and the pressure difference between the fluid entering and exiting the sieve plate throttling expander is 0.8 MPa, and 10.9 kg of liquid ethyl chloride and 10.9 kg of gaseous chlorine are collected. The methane is 87.1 kg, and the yields of the two are 96.2% and 98.2% respectively; after testing, the purity of liquid ethyl chloride and gaseous methyl chloride are 99.8% and 99.7...
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Abstract
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