A flexible vaseline liquid-phase hydrogenation process

Abstract

The invention discloses a flexible vaseline liquid-phase hydrogenation process. Vaseline raw material and circulating oil are mixed into the liquid phase hydrofinishing reactor, and the material passing through the upper hydrofinishing catalyst bed is divided into two streams; one stream of material is drawn out of the liquid phase hydrofinishing reactor through the middle of the bed, and enters the liquid phase The hydroisomerization reactor carries out the isomerization reaction; another stream of material continues to flow downward through the lower hydrofinishing catalyst bed; the obtained hydrofinishing reaction material and the hydroisomerization reaction material are subjected to gas-liquid separation and fractionation respectively to obtain Vaseline products of different specifications. The present invention provides for the first time a liquid-phase 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 materials to realize liquid-phase hydrogenation refining The coupled operation of the reactor and the liquid phase hydroisomerization reactor.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a petroleum jelly liquid-phase hydrogenation process for flexibly producing two 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 com...

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, including liquid-phase hydrogenation technology, can greatly reduce the content of impurities such as sulfur and nitrogen in petroleum jelly products, reduce the content of condensed ring aromatics, and improve the properties of petroleum jelly products through hydrogenation and refining. It is also possible to increase the content of isomeric hydrocarbons in petroleum jelly products and increase the stringiness of petroleum jelly products by using isomerization catalysts, but there is only one kind of petroleum jelly products produced by the above-mentioned process technology, and the product flexibility is poor

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