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Method for producing naphthenic base transformer oil base oil by using coal tar oil

A technology for transformer oil and naphthenic production, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of preparing liquid paraffin, which is not yet available, and achieve the effects of reducing density, rational utilization and high yield.

Active Publication Date: 2015-06-17
SHENMUFUYOU ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The raw materials of the process technologies reported above are all petroleum distillates, and there is no process report on the preparation of liquid paraffin from coal tar or its derivative products.

Method used

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  • Method for producing naphthenic base transformer oil base oil by using coal tar oil
  • Method for producing naphthenic base transformer oil base oil by using coal tar oil
  • Method for producing naphthenic base transformer oil base oil by using coal tar oil

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The method for producing naphthenic transformer oil base oil is realized by the following steps by using 500-700°C low-temperature coal tar produced in the coal pyrolysis process as raw material. figure 1 :

[0030] (1) Hydrotreating of coal tar

[0031] Coal tar and hydrogen are mixed and fed into the hydrogenation reactor, which is successively catalyzed by the molybdenum-nickel hydrofinishing catalyst supported by aluminum oxide and the ZSM-5 zeolite catalytic dewaxing catalyst supported by nickel. For hydrotreating, the reaction temperature is 380°C, the pressure is 14MPa, the volume ratio of hydrogen to oil is 1000:1, and the liquid volume space velocity relative to the hydrofining catalyst is 0.4h -1 , relative to the liquid volume space velocity of the catalytic dewaxing catalyst is 0.8h -1 , to obtain hydrogenated oil;

[0032] The above-mentioned molybdenum-nickel type hydrofining catalyst with aluminum oxide as the carrier is the TK-561 catalyst developed b...

Embodiment 2

[0053] In this example, in step (1), coal tar and hydrogen are mixed and fed into the hydrogenation reactor, followed by the molybdenum-nickel type hydrorefining catalyst with aluminum oxide as the carrier and the ZSM-5 zeolite with nickel as the carrier. Under the catalytic action of catalytic dewaxing catalyst, hydrotreating is carried out, the reaction temperature is 350°C, the pressure is 13MPa, the volume ratio of hydrogen to oil is 900:1, and the liquid volume space velocity relative to the hydrofining catalyst is 0.5h -1 , relative to the liquid volume space velocity of the catalytic dewaxing catalyst is 0.9h -1 , to obtain hydrogenated oil. Step (3) Use N-methyl pyrrolidone to extract the transformer oil fraction in the extraction tower by countercurrent mass flow and heat transfer, and the extracted transformer oil enters the solvent recovery device for vacuum distillation to remove residual N-methyl pyrrolidone and transformer oil The volume ratio of the distillate ...

Embodiment 3

[0055] In this example, in step (1), coal tar and hydrogen are mixed and fed into the hydrogenation reactor, followed by the molybdenum-nickel type hydrorefining catalyst with aluminum oxide as the carrier and the ZSM-5 zeolite with nickel as the carrier. Under the catalytic action of catalytic dewaxing catalyst, hydrogenation treatment is carried out, the reaction temperature is 360°C, the pressure is 12MPa, the volume ratio of hydrogen to oil is 1200:1, and the liquid volume space velocity relative to the hydrofining catalyst is 0.45h -1 , relative to the liquid volume space velocity of the catalytic dewaxing catalyst is 0.85h -1 , to obtain hydrogenated oil. The molybdenum-nickel hydrorefining catalyst with alumina as the carrier used in this example is the FZC-41A catalyst produced by Shandong Gongquan Chemical Co., Ltd. (http: / / www.gqcat.com.cn / Chinese / ProductList.asp?PID=25), the nickel-supported ZSM-5 zeolite catalytic dewaxing catalyst is the MLDW-3 catalyst of EXXON...

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Abstract

The invention relates to a method for producing naphthenic base transformer oil base oil by using coal tar oil. The method is characterized in that high-additional value products such as naphtha oil, diesel oil and transformer oil base oil are obtained by adopting the steps of hydrotreating of the coal tar oil, the fractional distillation of hydrogenated products, solvent refining of transformer distillate oil and clay refining of the transformer distillate oil. The method has the advantages that the hydrogenation industrial chain of the coal tar oil is extended, the coal tar oil resource is reasonably utilized, the utilization value of the coal tar oil is increased, meanwhile, the density of the coal tar oil hydrogenated diesel oil can be reduced, the cycloparaffin distillate oil (300-360 DEG C) with high content can be obtained, the quality of the transformer oil base oil is ensured, and the obtained transformer oil base oil has high quality and high yield and is in line with the standards on the transformer oil No. 45 in national GB2536-1990 transformer oil.

Description

technical field [0001] The invention belongs to the technical field of coal tar production, in particular to a method for producing naphthenic transformer oil base oil from coal tar. Background technique [0002] The main purpose of transformer oil is to insulate and cool transformers. Since the invention of the transmission transformer, people have been trying to find a medium that can not only meet the insulation and cooling performance requirements of the transformer, but also can work stably for a long time and is cheap. After long-term practical use, naphthenic base oil is recognized as the best choice, the safest and most economical choice. At present, global transformer manufacturers, especially the transformers produced by large multinational companies such as ABB and Alstom, all use transformer oil produced with naphthenic base oil without exception. [0003] Naphthenic base oil has low viscosity at high temperature, excellent solvency at extremely low temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/06
Inventor 王树宽杨占彪
Owner SHENMUFUYOU ENERGY TECH
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