Process for the preparation of halogenated hydrocarbons
A halogenated hydrocarbon and hydrogen halide technology, applied in the field of preparing halogenated hydrocarbons, can solve problems such as hidden safety hazards, increased equipment corrosion in reaction conditions and the risk of leakage of harmful substances, and achieves high selectivity, mild reaction conditions, and separation energy consumption. low effect
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[0026] The choice of catalyst has an important effect on the reaction of the present disclosure for preparing halogenated hydrocarbons, and only under the action of a suitable catalyst, the method of the present disclosure can be effectively implemented. The catalyst may be a compound containing metal elements of Groups IVB, VB, VIB, IB, IIB, IIIA and IVA, and the metal elements are preferably at least one selected from titanium, zirconium, molybdenum, aluminum and tin. The metal element-containing compound may be a salt and / or an oxide containing the above-mentioned metal element.
[0027] According to the present disclosure, the catalyst may also be a supported catalyst containing the metal element, and the supported catalyst may be prepared by a conventional impregnation-supporting method. Wherein, the carrier in the supported catalyst can be a silica carrier, preferably, the silica carrier is at least one selected from silica gel, mesoporous silica molecular sieve and crys...
Embodiment 1
[0048] Put ethylene, 30% by weight of hydrogen peroxide aqueous solution, 37% by weight of hydrochloric acid, titanium tetrachloride and the required amount of water into the reactor, wherein the molar ratio of ethylene, hydrogen peroxide, hydrochloric acid (calculated as hydrogen chloride) and water 1:1:1.5:40, the weight ratio of titanium tetrachloride to ethylene is 0.1:1, and then the reaction mixture in the reactor is reacted at a temperature of 20°C for 2 hours. Table 1.
Embodiment 2
[0050] Put propylene, 70% by weight of tert-butyl hydroperoxide aqueous solution, 37% by weight of hydrochloric acid, aluminum trichloride, tert-butanol and required amount of water into the reactor, wherein propylene, tert-butyl hydroperoxide, hydrochloric acid (calculated as hydrogen chloride), the molar ratio of tert-butanol to water is 1:1.5:3:18:42, the weight ratio of aluminum trichloride to propylene is 0.2:1, and then the reaction mixture in the reactor is heated at 30°C Reaction at high temperature for 3 hours, after completion of the reaction, sampling and analysis, the analysis results are shown in Table 1.
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