Flexible paraffin hydrogenation process

Abstract

The invention discloses a flexible paraffin hydrogenation process. A paraffin raw material enters a hydrofining reactor, and the material passing through an upper hydrofining catalyst bed layer is divided into two streams; one material stream is extracted out of the hydrofining reactor through the middle of the bed layer and enters a hydroisomerization reactor for isomerization reaction; the othermaterial stream flows downwards through a hydrofining catalyst bed layer at the lower part; and an obtained hydrofining reaction material and an obtained hydroisomerization reaction material are subjected to gas-liquid separation and fractionation separately to obtain paraffin products with different specifications. The invention provides the hydrogenation process for simultaneously producing more than two paraffin products with different specifications on a set of hydrogenation process equipment for the first time, heat carried by part of hydrofined materials can be fully utilized, and coupling operation of the hydrofining reactor and the hydroisomerization reactor can be realized.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a paraffin hydrogenation process for flexibly producing high-quality paraffin products. Background technique [0002] Paraffin wax is a solid petroleum product obtained by solvent dewaxing and deoiling of vacuum distillate oil. It is an important raw material for medicine, daily chemical industry and other fine chemical industries. Paraffin wax can be roughly divided into paraffin wax, high melting point petroleum wax, microcrystalline wax and so on. Paraffin wax for these purposes needs to be deeply refined to remove sulfur, nitrogen compounds and condensed aromatic hydrocarbons contained therein, in order to be harmless to the human body. Paraffin refining includes clay refining and hydrofining, among which hydrofining technology is a process in which non-ideal components in raw materials are hydrogenated and converted under certain temperature, pressure, hydrogen...

AI Technical Summary

Problems solved by technology

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

[0004] In summary, the existing paraffin hydrogenation technology can greatly reduce the content of impurities such as sulfur and nitrogen in paraffin products through hydrofining, reduce the content of condensed ring aromatics, and improve the properties of paraffin products. It can also be achieved by using isomerization catalysts. The method increases the isomeric hydrocarbon content in the paraffin wax product, strengthens the toughness of the paraffin wax product, solves the problem of easy breakage, but the paraffin wax product produced by the above-mentioned process technology has only one kind, and the product flexibility is relatively poor

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