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Process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil

A technology of raffinate oil and solvent oil, which is applied in the petroleum industry, hydrotreating process, and hydrocarbon oil treatment. It can solve the problem of rising dry point of n-hexane, reduce device energy consumption, reduce product cost, and prolong catalyst life. Effect

Active Publication Date: 2011-02-16
TIANJIN JINGHUA PETROCHEM
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  • Abstract
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AI Technical Summary

Problems solved by technology

The cyclohexane formed after hydrogenation causes the dry point of the product n-hexane to rise

Method used

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  • Process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil
  • Process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil
  • Process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the embodiments. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

[0025] Such as figure 1 In the process of removing aromatics from raffinate oil to produce solvent oil, the raw material raffinate oil with high bromine value enters a tower (a tower: feed: 10.8 tons / hour; tower top temperature: 80.4°C; pressure: 0.03MPa; Tower bottom temperature: 121.9°C; reflux ratio: 0.8-1.0; number of trays: 48 layers + 6 meters of packing; separation conditions: the fraction with a dry point ≤ 90°C is cut from the top of the tower, and the fraction with a dry point of 90°C to 120°C is cut from the side line. The bottom of the tower is the heavy fraction > 120°C), and catalyst poisons such as sulfolane, part of water, and colloid in the raffinate are discharged from the bottom of the tower. The light com...

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Abstract

The invention discloses a process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil, which comprises the following steps of: (1) rectifying raffinate oil, and removing sulfolane, water and colloid substances from the raffinate oil; (2) completely hydrogenating the raffinate oil obtained in the step (1) under the action of a benzene hydrogenation catalyst; and (3) removing excessive hydrogen from the product of the step (2) by separating, rectifying and collecting the product at the top of a rectifying tower to obtain solvent oil No.6 or normal hexane. In the method, all the raw materials are cleaned, hydrogenated and separated, reformed circulating hydrogen can be used, and the distillation range of the product is controllable. The content of aromatic hydrocarbon in the obtained product is trace, and the bromine number is lower than 100 mgBr / 100g.

Description

technical field [0001] The invention relates to a petrochemical industry, in particular to a process for producing solvent oils such as vegetable oil extraction solvents, No. 6 solvent oils, n-hexane and the like by removing aromatics from raffinate oil. Background technique [0002] Most of the production of solvent oil from raffinate oil first uses hydrogenation to remove unsaturated hydrocarbons and other impurities in the raw material, and then separates the reaction oil according to the distillation range to produce No. 6, No. 120 and other types of solvent oil. Domestic hydrogenation catalysts using this method to obtain solvent oil mainly include MH-705 with platinum as the active component and NCG catalyst with nickel as the active component. There are also a few manufacturers that use Ni, Co, and Mo as active components. Hydrogenation catalysts for components, and related units are developing catalysts with palladium as the active component for hydrogenation of raff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 仝少鹏李泽民刘勇陈爱群
Owner TIANJIN JINGHUA PETROCHEM
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