Method for preparing o-chlorotoluene
A technology of ortho-chlorotoluene and toluene, which is applied in the field of preparation of ortho-chlorotoluene, can solve problems such as difficulty in obtaining pure ortho-chlorotoluene, high content of middle sites in chlorinated liquid, and decreased proportion of ortho-chlorotoluene, achieving good industrial prospects and high activity , the effect of fast reaction rate
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Embodiment 1
[0018] The method for preparing o-chlorotoluene, the steps are as follows: N 2 Under protection, the FeCl 3 and macroporous silica gel were added to absolute ethanol, FeCl 3 The ratio of the amount and mass of the macroporous silica gel to the substance is: 0.5mmol: 10g; the mass volume ratio of the macroporous silica gel to absolute ethanol is: 1g: 10ml; the temperature is raised to 60°C, refluxed and stirred for 2h, and after the reaction is completed, the The filtered sample was dried at 80°C for 12 hours, and the obtained sample was FeCl 3 Loaded macroporous metal silica gel catalyst; toluene raw material and catalyzer are added in the reactor, and the add-on of catalyst is 0.1% of toluene quality; Pass into chlorine in the reactor, make toluene and chlorine carry out liquid phase ring chlorination reaction, The chlorination reaction temperature is 50°C; the chlorination reaction time is 6h. The chlorination reaction is carried out by means of tower-type ring chlorinati...
Embodiment 2
[0021] The method for preparing o-chlorotoluene, the steps are as follows: N 2 Under protection, the FeCl 3 and macroporous silica gel were added to absolute ethanol, FeCl 3 The ratio of the amount and mass of the macroporous silica gel to the substance is: 5mmol: 10g; the mass volume ratio of the macroporous silica gel to absolute ethanol is: 1g: 15ml; the temperature is raised to 90°C, refluxed and stirred for 4h, and after the reaction is completed, filter The final sample was dried at 80°C for 12 hours, and the obtained sample was FeCl 3 The macroporous metal silica gel catalyst of load; Toluene raw material and catalyzer are joined in the reactor, and the add-on of catalyzer is 2% of toluene quality; Pass into chlorine in the reactor, make toluene and chlorine carry out liquid phase ring chlorination reaction, The chlorination reaction temperature is 80°C; the chlorination reaction time is 12h. The chlorination reaction is carried out by means of tower-type ring chlori...
Embodiment 3
[0024] The method for preparing o-chlorotoluene, the steps are as follows: N 2 Under protection, the FeCl 3 and macroporous silica gel were added to absolute ethanol, FeCl 3 The ratio of the amount and mass of the macroporous silica gel to the substance is: 3mmol: 10g; the mass volume ratio of the macroporous silica gel to absolute ethanol is: 1g: 12ml; the temperature is raised to 80°C, refluxed and stirred for 3h, and after the reaction is completed, filter The final sample was dried at 80°C for 12 hours, and the obtained sample was FeCl 3 Loaded macroporous metal silica gel catalyst; toluene raw material and catalyzer are added in the reactor, and the add-on of catalyzer is 1% of the toluene quality; Pass into chlorine in the reactor, make toluene and chlorine carry out liquid phase ring chlorination reaction, The chlorination reaction temperature is 60°C; the chlorination reaction time is 8h. The chlorination reaction is carried out by means of tower-type ring chlorinat...
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