Two-stage hydrogenation method for producing low freezing point motor fuel
A technology of motor fuel and low freezing point, applied in the field of hydrogenation, can solve the problems of downtime and replacement, poor catalyst stability, inability to meet industrial applications, etc., and achieve the effect of reducing the freezing point.
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[0025] The method of the invention is specifically as follows: taking one or more of the mixed oils in the biological oil as the raw material oil, under the hydrogenation operation conditions, the raw material oil and hydrogen pass through the low-temperature and high-temperature hydrogenation reactors filled with sulfided catalysts to obtain The gas obtained from the hydrogenation generated oil is separated in the high pressure separator (referred to as high fraction) and is recycled in the first-stage reaction zone after dehydration treatment. In the second-stage reaction zone of the catalyst, the gas obtained by the hydrogenation-upgraded stream separated in the high-pressure separator (referred to as high-grade fraction) is recycled in the second-stage reaction zone, and the obtained liquid is fractionated to obtain the following products: gas, naphtha, For one or more of the low freezing point diesel, if the properties of the diesel product are further improved or the operat...
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