Process for producing high-purity chloroethane
A high-purity ethyl chloride technology, applied in the field of producing high-purity ethyl chloride, can solve the problems of low yield, three waste pollution, and high water content, and achieve high product yield, no three waste pollution, and simplified production process Effect
Inactive Publication Date: 2005-02-16
肖华舫
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Problems solved by technology
The production process in the 1980s generally used dichloroethane as an inhibitor, but its use was limited due to its extreme toxicity and environmental hazards
[0003] "Liaoning Chemical Industry", reported in 2000 №1 utilizes water, ferric chloride and alcohol to first synthesize ethyl chloride and remove impurities through steps such as alkali washing and drying by means of chemical synthesis, the used process flow is long, the yield is low, High investment, accompanied by three wastes pollution, and the resulting product has a high moisture content
Method used
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Embodiment 1
[0019] Inject 10 kg of industrial ethyl chloride synthesized by the ethanol method into the reactor with a jacket, with a purity of 99.5%. Hot water at 90°C is introduced into the jacket to control the flow of hot water so that the evaporation temperature of ethyl chloride Keeping it at 20°C, the evaporated gas passed through the adsorption tower equipped with cation-modified natural zeolite and 5 angstrom molecular sieve in turn, and then cooled the ethyl chloride gas into liquid with water at 0°C to obtain 9.9 kg of finished product with a product yield of 99% %, the quality indicators of the product are as follows: the purity is 99.93%, the water content is 30ppm, the acid value is less than 10ppm, the polychloride is 0ppm, and the non-volatile components are less than 10ppm.
[0020] The purity of the product obtained by using this process is above 99.9%, the moisture in the impurities is less than 50ppm, the acid value is less than 10ppm, the polychloride is less than 50pp...
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Abstract
The invention discloses a kind of technology to produce the chloroethylene with high purity and includes the following steps: gasify the industrial chloroethylene in the evaporator with hot water of between 40deg.C and 100deg.C and control the gasification temperature at between 15deg.C and 25deg.C; make the gas of chloroethylene pass through the adsorption tower I with adsorbent at the normal temperature and pressure; let the gas which passes through the adsorption tower I into the adsorption tower II with molecular sieve; cool the gas after passing through the adsorption tower II and sent it into the producing kettle. The invention purifies the industrial chloroethene and gets rid of the organic impurities and heavy-metal ions mainly by evaporation-adsorption-drying and the purity of the products, chloroethene, can reach 99.9%. It is featured by simple technology and low cost.
Description
technical field [0001] The invention relates to a process for producing ethyl chloride, especially a process for producing high-purity ethyl chloride. Background technique [0002] In the process of epoxidation of ethylene to ethylene oxide, in order to suppress the deep oxidation of ethylene and improve the selectivity of the reaction, it is necessary to add an oxidation inhibitor to the reaction system to suppress the deep oxidation reaction. The production process in the 1980s generally used dichloroethane as an inhibitor, but its use was limited due to its extreme toxicity and environmental hazards. A new generation of oxidation inhibitors uses low-toxic and environmentally friendly ethyl chloride, which has been widely used in ethylene oxide plants built in the 1990s. The epoxidation process has high requirements on the purity and impurities of ethyl chloride, among which the purity is greater than 99.8%, the water content is less than 50ppm, the acid value is less tha...
Claims
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IPC IPC(8): C07C17/389C07C19/043
Inventor 肖华舫
Owner 肖华舫