A kind of production method of diethyl ethyl phosphonate
A technology of diethyl ethyl phosphonate and a production method, which is applied in the production field of diethyl ethyl phosphonate, can solve problems such as long process reaction time, pollute the environment, and low conversion rate, and achieve high product yield, The effect of high conversion rate and short production cycle
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Embodiment 1
[0029] The production method of this diethyl ethyl phosphonate is to take triethyl phosphite as main raw material, with iodine as catalyzer, and its production steps are as follows:
[0030] The first step: start the vacuum pump, open the vacuum valve on the reaction kettle, and use negative pressure to pump 2000kg of triethyl phosphite into the reaction kettle; close the vacuum valve, open the vent valve, and then add 6kg of iodine catalyst from the catalyst feeding port;
[0031] Step 2: Close the vent valve, turn on the agitator, and open the return pipe valve;
[0032] The third step: pass steam to the jacket of the reaction kettle to raise the temperature, and heat the material to 135°C±5°C to promote the positive reaction; at the same time, open the reflux condenser to condense the steamed gas;
[0033] Step 4: After the evaporated gas is condensed, it flows back into the reaction kettle from the reflux pipe. After the reflux flow is stable, stop heating, and the tempera...
Embodiment 2
[0040]The production method of this diethyl ethyl phosphonate is to take triethyl phosphite as main raw material, with iodine as catalyzer, and its production method comprises the steps:
[0041] The first step: Start the vacuum pump, open the vacuum valve on the reactor, and use negative pressure to pump 2000kg of triethyl phosphite into the reactor; close the vacuum valve of the reactor, open the vent valve, and then add 2kg of iodine from the catalyst feeding port catalyst;
[0042] Step 2: Turn on stirring and open the return pipe valve; the return pipe valve is installed on the return pipe set on the top of the reactor, and the upper end of the return pipe is respectively connected to the gas inlet and condensate outlet of the reflux condenser; the condensate can be refluxed through the return pipe into the reactor;
[0043] The third step: pass steam to the jacket of the reaction kettle to raise the temperature, and heat the material to 135°C±5°C to promote the positive...
Embodiment 3
[0050] A kind of production method of diethyl ethyl phosphonate is characterized in that comprising the following steps successively:
[0051] 1) Add 1000kg of triethyl phosphite and 2kg of catalyst iodine into the closed reaction kettle;
[0052] 2) Stir the materials in the reactor and open the return pipe valve. The return pipe valve is installed on the return pipe provided on the top of the reaction kettle, and the upper end of the return pipe is respectively connected to the gas inlet and the condensate outlet of the reflux condenser;
[0053] 3) Heat the material in the reactor to 135°C±5°C; promote the forward reaction; at the same time, turn on the reflux condenser to condense the evaporated gas;
[0054] 4) After the evaporated gas is condensed, it returns from the return pipe to the reactor. After the reflux flow is stable, the heating is stopped, and the temperature of the reaction material will gradually increase through its own exothermic reaction; the reactor is ...
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