Flexible vaseline hydrogenation process

Abstract

The invention discloses a flexible vaseline hydrogenation process. Vaseline raw material enters the hydrorefining reactor, and the material after passing through the upper hydrorefining catalyst bed is divided into two streams; one stream of material is separated by a gas-liquid separator installed in the middle of the bed, and the liquid obtained is drawn out of the refining reactor and mixed with hydrogen Then enter the hydroisomerization reactor for isomerization reaction; the other material is the gas in the reactor and the remaining liquid mixture flow after extraction, and the mixture flow continues to flow down through the lower hydrotreating catalyst bed; the obtained hydrogenation The refined reaction material and the hydroisomerization reaction material are subjected to gas-liquid separation and fractional distillation respectively to obtain vaseline products of different specifications. The invention provides for the first time a hydrogenation process for simultaneously producing two or more vaseline products of different specifications on a set of hydrogenation process equipment, which can make full use of the heat carried by part of the hydrogenation refining material to realize the hydrogenation refining reactor and hydrogenation process. Coupling operation of hydroisomerization reactors.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a petroleum jelly hydrogenation process for flexibly producing high-quality petroleum jelly products. Background technique [0002] Vaseline is an ointment-like petroleum product with certain characteristics, and it is an important raw material for the production of pharmaceuticals, daily chemicals and other fine chemicals. Vaseline raw materials are mainly blended with residual oil wax paste and lubricating oil. The commonly used refining methods of Vaseline include acid-clay refining, aluminum trichloride refining and hydrogenation refining. Due to the low yield of the first two refining methods, a large amount of waste that is difficult to handle is generated, which leads to high production costs and serious environmental pollution, and has been gradually replaced by the hydrofining method. [0003] Due to the high content of sulfur, nitrogen compounds and aromat...

AI Technical Summary

Problems solved by technology

However, the above-mentioned vaseline hydrogenation process can only produce one kind of vaseline product, and the operation flexibility is poor.

[0004] In summary, the existing petroleum jelly hydrogenation technology can greatly reduce the content of impurities such as sulfur and nitrogen in petroleum jelly products through hydrofining, reduce the content of condensed ring aromatics, and improve the properties of petroleum jelly products. It can also be achieved by using heterogeneous catalysts The method to increase the content of isomeric hydrocarbons in petroleum jelly products and increase the stringiness of petroleum jelly products, but there is only one kind of petroleum jelly products produced by the above-mentioned process technology, and the product flexibility is relatively poor

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