38results about How to "High in paraffins" patented technology

The invention relates to a comprehensive utilization method of hydrocracking tail oil. The method comprises the following concrete steps: firstly, the hydrocracking tail oil is subject to vacuum distillation; the light fraction of the distilled hydrocracking tail oil is used as a raw material for preparing ethylene by steam cracking; and the heavy fraction of the distilled hydrocracking tail oil is used as a raw material for producing base oil of lubricating oil. High-quality base oil of lubricating oil can be prepared from the heavy fraction of the hydrocracking tail oil by the processes of heterogeneous dewaxing, supplementary refining and the like. Compared with the prior art, the method provided by the invention not only can produce high-quality base oil of lubricating oil but also can supply ethylene cracking raw materials; and meanwhile, the yield of olefin and base oil of lubricating oil is improved, the product cost is lowered, the problem of shortage in raw materials for producing the base oil of lubricating oil in enterprises is effectively solved, and the flexibility of the product scheme is improved.

The invention discloses a flexible two-stage hydrocracking method. The wax oil raw material enters the separation system after hydrogenation pretreatment and mild hydrocracking, and the separated liquid phase without impurities is divided into two parts, one part of the liquid phase enters the hydrocracking reactor using the reducing state hydrocracking catalyst, and the other A part of the liquid phase is mixed with the hydrocracking tail oil and enters the hydroisomerization cracking reactor using the reduced hydroisomerization cracking catalyst, and the obtained hydrocracking reaction material and the hydroisomerization cracking reaction material are subjected to gas-liquid separation and fractionation respectively , to obtain different specifications of naphtha, jet fuel, diesel and tail oil products. The present invention provides for the first time a two-stage hydrocracking process for simultaneously producing two or more different specifications of light naphtha, heavy naphtha, jet fuel, diesel oil, and tail oil products on a set of hydrogenation process equipment.

The invention discloses a flexible single-stage hydrocracking process. The wax oil raw material is mixed with hydrogen and enters the single-stage hydrocracking reactor, and the material passing through the upper single-stage hydrocracking catalyst bed is divided into two streams; one stream of material is drawn out of the single-stage hydrocracking reactor through the middle of the bed, and Enter the hydroisomerization cracking reactor for isomerization cracking reaction; another stream of material continues to flow down through the lower single-stage hydrocracking catalyst bed; the obtained single-stage hydrocracking reaction material and hydroisomerization cracking reaction material are respectively Carry out gas-liquid separation and fractionation to obtain naphtha, jet fuel, diesel and tail oil products of different specifications. The present invention provides for the first time a single-stage hydrocracking process for simultaneously producing two or more different specifications of light naphtha, heavy naphtha, jet fuel, diesel oil, and tail oil products on a set of hydrogenation process equipment, which can make full use of The heat carried by part of the cracked material realizes the coupled operation of the single-stage hydrocracking reactor and the hydroisomerization cracking reactor.