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Process for deeply de-aromatizing and desulfurizing solvent oil

A solvent oil and dearomatization technology, applied in refining to remove heteroatoms, etc., can solve the problems of insufficient deep dearomatization ability of the catalyst, reduced hydrogenation activity, complicated process, etc., and achieve simplified hydrogenation treatment process, low reaction temperature, Energy Saving Effect

Inactive Publication Date: 2006-11-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong exothermic reaction in the hydrogenation saturation process of aromatics, the deep dearomatization ability of this kind of catalyst is not enough
The noble metal catalyst has good low-temperature hydrogenation activity because it is not limited by thermodynamics, so that it can achieve the purpose of deep removal of trace aromatics, but the noble metal catalyst is extremely sensitive to sulfur, that is, the presence of trace sulfur in solvent oil can cause hydrogenation. The greatly reduced hydrogen activity
On the other hand, the currently used hydrogenation process adopts the gas-phase hydrogenation method, and the solvent oil needs to be pre-gasified. The process is complicated and the energy consumption is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Implementation Mode 1 Select High Standard 6 # Solvent oil is used as raw material oil, wherein the content of benzene is 600ppm, and the content of sulfur is 7ppm. Prepare a HY zeolite-supported Ru catalyst with a metal loading of 2.5wt% by aqueous solution impregnation method, mix 0.05g of it with 0.15g of HY, reduce it with hydrogen, pour it into a reaction kettle pre-installed with 40ml of raw material oil, and replace the kettle with hydrogen In the air, heat the reactor to 40°C, seal the reactor and adjust the pressure to 1.0Mpa, the reaction timing starts, when the reaction is carried out for 70 minutes, it can be seen from the sampling analysis that the content of benzene in the raw oil drops to 3ppm, sulfur The content dropped to 0.9ppm.

Embodiment approach 2

[0022] Implementation Mode 2 Select High Standard 6 # Solvent oil is used as raw material oil, wherein the content of benzene is 600ppm, and the content of sulfur is 5ppm. A HUSY zeolite-supported Ru catalyst with a metal loading of 2.5 wt% was prepared by an aqueous solution impregnation method, and 0.06 g of it was mixed with 0.18 g of HUSY. The reaction timing was started under the same operation steps and reaction conditions as in Embodiment 1, and the amount of raw material oil was 50 ml. Sampling and analysis after 120 minutes of reaction showed that the content of benzene in the raw oil dropped to 4ppm, and the content of sulfur dropped to 0.9ppm.

Embodiment approach 3

[0023] Embodiment 3 Use the raw material oil and the main catalyst as in Embodiment 2, mix 0.06g of it with 0.30g of HUSY, and react under the same operation steps as in Embodiment 1. The reaction temperature is 70°C, the reaction pressure is 2.0Mpa, and the raw material oil The dosage is 70ml. After the reaction was carried out for 55 minutes, it was known through sampling and analysis that the content of benzene in the raw oil dropped to 3ppm, and the content of sulfur dropped to 0.8ppm.

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Abstract

The process of deeply dearomatizing and desulfurizing solvent oil belongs to the field of petrochemical technology. The process features that under the conditions of reaction temperature 20-80 deg and total pressure 0.5-3.0 MPa and in the presence of mixed catalyst, the solvent oil with lower arene and sulfur content is liquid phase hydrorefined inside an intermittent reactor. The said process can lower the arene and the sulfur contents to below 5 ppm and 1 ppm separately. Meanwhile, the mixed catalyst of zeolite molecular sieve supported noble metal Pt, Pd and Ru as main components and hydrogen type zeolite molecular sieve as assistant is used. Compared with vapor hydrogenation dearomatizing and desulfurizing process, the present invention has the features of simple technological process, low power consumption, mild condition and deep dearomatizing and desulfurizing effect, and the catalyst possesses has both hydrogenation dearomatizing and desulfurizing functions.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and in particular relates to a method for desulfurizing hydrocarbon solvent oil by using a mixed catalyst at low temperature for low-temperature liquid-phase catalytic hydrogenation and deep dearomatization. technical background [0002] As a light oil product with low boiling point, hydrocarbon solvent oil is widely used in pharmaceutical, chemical, rubber, polymer materials and food industries. The key to evaluating the quality of solvent oil products is the content of aromatics and sulfur, especially for 6, which is a special extractant for edible oil. # The limitation on the content of aromatics mainly in the form of benzene in mineral spirits is more stringent. The production of high-quality hydrocarbon solvent oils with low aromatics and low sulfur content has become the development direction of various solvent oil manufacturers. [0003] At present, the solvent oil dearomatization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/04
Inventor 马静红崔晓静毛继平陈萍李瑞丰
Owner TAIYUAN UNIV OF TECH
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