China University of Petroleum

Crrc Qingdao Sifang Co., Ltd.

Shandong University

Bin Liu

Chenguang Liu

Yunqi Liu

Kongyuan Zhang

Yichuan Li

Yongming Chai

Yuan Pan

Baojiang Sun

Tongbin Zhao

Weiyao Guo

Yanchun Yin

Fenghai Yu

Minglu Xing

Yubao Zhang

Bingsong Wang

Keshu Zhang

Chunlin Li

Qilong Shi

Wenli Liu

Yaxin Liu

Xiaohao Wang

Longfei Li

Yanling Wang

Lei Liang

Di Li

Xingji Wang

A method for hydrotreating and recycling waste lubricating oil, the method comprising the two steps of slurry bed pre-hydrotreatment and deep hydrotreatment, specifically as follows: mechanical impurities are removed from waste lubricating oil, and then the oil is subjected to flash distillation to separate free water and a portion of light hydrocarbons; a bottom product of the flash distillation column is mixed with hydrogen and a self-sulfurizing oil-soluble transition metal catalyst, and then enters a slurry bed reactor for pre-hydrotreatment; a liquid product obtained by performing separation on a reaction effluent is subjected to hydrocyclone separation and solvent washing to remove solid residue, and then a pre-treated lubricating oil component is obtained; said component is mixed with hydrogen and then enters a hydrofining reactor, an isomerization-dewaxing reactor, and a supplementary refining reactor, connected in series, for hydrotreatment; and the reaction products are separated to obtain high-quality naphtha, diesel oil and a lubricating base oil. The method of the present invention has such advantages as simple processing procedures, a high oil liquid yield, good lubricating oil base oil quality, and can implement full-fraction resource utilization of waste lubricating oil. In addition, the oil-soluble catalyst features simple dispersion, no need for vulcanization, a small catalyst adding amount, high low-temperature hydrogenation activity, is capable of effectively preventing the coking that could occur during a process of preheating the waste lubricating oil, and ensures long-term stable operation of the device.

Method for hydrotreating and recycling waste lubricating oil

The present invention relates to a pre-hydrotreatment and purification method for waste lubricating oil, the method comprising the following steps: mechanical impurities are removed from waste lubricating oil, and then the oil is subjected to flash distillation to separate free water and a portion of light hydrocarbons; a bottom product of the flash distillation column is mixed with hydrogen and a self-sulfurizing oil-soluble transition metal catalyst, and then enters a slurry bed reactor for pre-hydrotreatment; a gas product obtained by performing separation on a reaction effluent is subjected to adsorption purification and then enters a hydrogen recycle compressor for cyclic use; a liquid product obtained by performing separation on a reaction effluent is subjected to hydrocyclone separation and solvent washing to remove solid residue, and finally a purified lubricating oil component is obtained. The method of the present invention has such advantages as simple processing procedures, a high non-ideal component conversion rate, a high oil liquid yield, and good quality. In addition, the oil-soluble catalyst features simple dispersion, no need for vulcanization, a small catalyst adding amount, high low-temperature hydrogenation activity, and is capable of effectively preventing the coking that could occur during a process of preheating the waste lubricating oil, markedly extending the operational lifespan of a waste lubricating oil hydrogen treatment device.

Method for pre-hydrotreating and purifying waste lubricating oil

The disclosure provides a seat mounting structure and a train having same. The seat mounting structure includes a seat body (), a side wall mounting member () and a suspension mounting rod (), wherein a first end of the seat body is connected to a carriage side wall () by the side wall mounting member; one end of the suspension mounting rod is connected to a carriage roof, and the other end of the suspension mounting rod is connected to a second end of the seat body; wherein the first end of the seat body is one end, close to the carriage side wall, of the seat body, and the second end of the seat body is one end, away from the carriage side wall, of the seat body. The seat mounting structure provides an effective support for a suspension seat to improve a structural strength of the suspension seat.

Seat mounting structure and train having same

A test system for an anchoring performance of a full-size rock mass anchor bolt under combined load and relates to the technical field of detection test equipment includes a primary frame, a co-directional pull-twist loading mechanism and a vertical shear loading mechanism. The primary frame includes a dual-parallel horizontal reaction frame and a vertical reaction frame. The co-directional pull-twist loading mechanism and the vertical shear loading mechanism are arranged in synergy with the primary frame. The co-directional pull-twist loading mechanism performs synchronous pull and twist loading for the anchored rock mass and the vertical shear loading mechanism applies a static load or simulates a dynamic load disturbance. The co-directional pull-twist loading mechanism and the vertical shear loading mechanism perform separate loading.

Test system and method for anchoring performance of full-size rock mass anchor bolt under combined load

A preparation method for and an application of a modified siloxane-based supercritical carbon dioxide thickener are disclosed. The method includes the following steps: using 1,3-diallyl-1,3,5-triazine-2,4,6-trione as a polymerization monomer, and dropwise adding 1,3,5,7-tetramethylcyclotetrasiloxane for hydrosilylation in the presence of a catalyst to obtain a modified siloxane polymer. The obtained modified siloxane polymer is directly used as a supercritical carbon dioxide thickener without purification post-treatment; when in use, the modified siloxane polymer is prepared into a solution with a concentration of 1-2%, has an excellent thickening effect with no cosolvent required, and has high solubility in carbon dioxide and high temperature resistance.

Preparation method for and application of modified siloxane-based supercritical carbon dioxide thickener

An embodiment of the present disclosure provides an interior decoration structure and a railway vehicle with the interior decoration structure. The interior decoration structure is located inside a vehicle body. The interior decoration structure includes: a plurality of interior decoration components, the plurality of interior decoration components being spliced inside the vehicle body in sequence, wherein at least one pair of two adjacent interior decoration components are connected by an inserted-connected structure. The interior decoration structure in the present disclosure solves the problem in the related art that interior decoration parts are prone to unstable connection due to a mounting mode of an interior decoration structure.

Interior decoration structure and railway vehicle with interior decoration structure

Growing community of inventors

Qingdao, China

Bin Liu