China Petroleum Chemical Corporation

Fushun Research Institute of Petroleum and Petrochemicals, Sinopec Corp.

Dalian Research Institute of Petroleum and Petrochemicals, Sinopec Corp.

Ronghui Zeng

Xiangchen Fang

Tao Liu

Baozhong Li

Xuehui Zhang

Wei Liu

Ying Zhang

Rong Guo

Yan Wang

Zhaoming Han

Mei Jin

Shike Sun

Hongjiang Sun

Chong Peng

Ping Wu

Zhenmin Bai

Jihua Liu

Benzhe Li

Youliang Shi

Yuzhuo Zhao

Baoping Han

Ruoxia Song

A method of wax oil hydrocracking includes the steps of pre-hydrotreating wax oil to obtain a pre-hydrotreated material flow; controlling the pre-hydrotreated material flow and a hydrogen-containing material flow to contact with a first hydrocracking catalyst to obtain a first hydrocracked material flow, and dividing the first hydrocracked material flow into a first hydrocracked material flow A and a first hydrocracked material flow B; controlling the flow B and a hydrogen-containing material flow to contact with a second hydrocracking catalyst to obtain a second hydrocracked material flow, and then separating and fractionating the second hydrocracked material flow to obtain a hydrocracked tail oil product; controlling the flow A, at least a part of the hydrocracked tail oil product, and a hydrogen-containing material flow to contact with a hydrogenation isocracking catalyst to obtain a hydrogenation isocracked material flow, and then separating and fractionating the obtained hydrogenation isocracked material flow.

Wax oil hydrocracking method and system

The present invention relates to a wet start-up method for hydrogenation unit, an energy-saving hydrogenation process, and a hydrogenation apparatus. The method involves heating a start-up activating oil to a specific temperature and flowing the heated oil through a bed of hydrogenation catalyst bed, so that the temperature at the catalyst bed layer is increased to 180&#xb1;10&#xb0; C. or above by means of heat exchange and the reaction heat generated from activation in the start-up method.

Wet start-up method for hydrogenation unit, energy-saving hydrogenation process and hydrogenation apparatus

Disclosed is a process for hydrotreating inferior naphtha fraction, comprising: (1) warming a recycle oil in a heating device; (2) mixing the inferior naphtha fraction with the recycle oil before and/or after the heating device; and (3) feeding the mixture of the inferior naphtha fraction and the recycle oil into a separating unit, wherein the gas-liquid separation is realized at least to obtain a gas phase and a liquid phase, wherein the gas phase comprises gasified inferior naphtha, wherein the gas phase enters a hydrotreating reactor to undergo hydrotreating, and wherein part of the liquid phase circulates to the heating device as the recycle oil; wherein warming of the recycle oil is controlled to ensure the temperature of gas phase from the separator at least reaches the inlet temperature of the hydrotreating reactor. Comparing with the prior art, the inventive process effectively solves the coking problem of the hydrogenating unit for inferior naphtha fraction.

Process for hydrotreating inferior naphtha fraction

The present invention relates to a process for carrying our gas-liquid countercurrent processing comprising passing the liquid material and the gas reactant in countercurrent flow through the fixed bed of catalyst in a reactor, characterized in that the fixed bed of catalyst includes two or more catalyst layers, with the difference of voidage between the adjacent catalyst layers being at least 0.05. The voidages of the catalyst layers can be increased or decreased in the direction of the flow of the liquid phase. The process of the invention can be effected with an increased range of gas-liquid ratio and an improved stability and flexibility.

Process for carrying out gas-liquid countercurrent processing

Growing community of inventors

Liaoning, China

Ronghui Zeng