Catalytic hydrogenation method for inferior wax oil

Abstract

The invention discloses a catalytic hydrogenation method for inferior wax oil. The method comprises the steps: (1) introducing the inferior wax oil to a first reaction zone for first hydrofining in the presence of hydrogen gas; (2) introducing effluent of the first reaction zone to a flash vaporization section for flash vaporization, so as to obtain a gas-phase component and a liquid-phase component; (3) introducing the liquid-phase component to a second reaction zone, and subjecting the liquid-phase component to countercurrent contact with hydrogen gas introduced from the bottom of the second reaction zone, so as to carry out second hydrofining; and (4) mixing effluent of the second reaction zone with the gas-phase component obtained in the step (2), and then, introducing the mixture into a gas-liquid separation system and a fractionating system sequentially. According to the method disclosed by the invention, the sulfur content and nitrogen content of high-sulfur and high-nitrogen inferior raw materials can be remarkably lowered, and the operating cycle of a catalytic hydrogenation device can be prolonged.

Description

technical field

[0001] The invention relates to a method for catalytic hydrogenation of inferior wax oil. Background technique

[0002] Since the beginning of the 21st century, the trend of heavy and inferior crude oil in the world has been intensified. At the same time, with the increasingly stringent environmental protection awareness and environmental regulations, the pace of upgrading the quality of vehicle fuels has been accelerating. my country began to implement the GB17930-2011 gasoline standard equivalent to Euro III in May 2011. Beijing began to implement the DB11 / 238-2007 gasoline standard equivalent to Euro IV on January 1, 2008, and implemented the DB11 / 238-2012 gasoline standard equivalent to Euro V on June 1, 2012.

[0003] Catalytic cracking technology is a technology in which heavy petroleum hydrocarbons react under the action of a catalyst to produce light oil products such as liquefied gas, gasoline and diesel oil. It is one of the key technologies for li...

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