Waste lubricating oil dechlorination method

The invention provides a waste lubricating oil dechlorination method, which comprises the following steps of: settling and filtering waste lubricating oil, mixing with an aqueous solution of a dechlorination agent, heating, feeding into a dechlorination tower at a reaction temperature of 80-170 DEG C, dehydrating the oil phase of the dechlorination tower to obtain dechlorinated waste lubricating oil, and returning the water phase to a dechlorination agent tank for recycling, wherein the dechlorination agent is prepared by compounding dodecyl dimethyl benzyl ammonium hydroxide, N.N-diethyl-1, 3-propane diamine, isotridecanol polyoxyethylene polyoxypropylene ether and ethyl alcohol according to a proportion. According to the waste lubricating oil dechlorination method provided by the invention, the dechlorination rate is greater than 92%, and continuous operation can be realized; and compared with intermittent operation of a reaction kettle, the efficiency is higher, the operation is simple, and the problems of