Flexible paraffin hydrogenation process

Abstract

The invention discloses a flexible paraffin hydrogenation process. The paraffin wax raw material enters the hydrofining reactor, and the material after passing through the upper hydrofining catalyst bed is divided into two streams; one stream of material passes through the gas-liquid separator installed in the middle of the bed, and the separated liquid is drawn out of the refining reactor and mixed with hydrogen into the The hydroisomerization reactor carries out the 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 hydrofinishing catalyst bed; the resulting hydrofinishing reaction The material and the hydroisomerization reaction material are subjected to gas-liquid separation and fractionation respectively to obtain paraffin products of different specifications. The present invention provides a hydrogenation process for the simultaneous production of two or more paraffin products of different specifications on a set of hydrogenation process equipment for the first time, 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 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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