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Method for preparing diesel from coal tar serving as raw material

A technology of coal tar and diesel oil, which is applied in the direction of fuel, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of difficult treatment of acid residue and alkali residue, poor quality of diesel products, and unfavorable environmental protection, so as to improve the shortage of energy supply, The effect of reducing production cost and simple equipment

Inactive Publication Date: 2010-10-27
JINAN DEV ZONE XINGHUO SCI & TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two have the advantages of simple process, small investment and quick results, but the quality of diesel products is poor and can only be burned as inferior fuel oil, causing air pollution, and the acid-base refining process pollutes water sources
Most of the above coal tar processing techniques are firstly distilled to extract fractions containing more components, and then undergo acid-base washing, reducing rectification and other processes, but the acid residue and alkali residue produced by this method are difficult to handle and are not conducive to the environment. protection of

Method used

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  • Method for preparing diesel from coal tar serving as raw material
  • Method for preparing diesel from coal tar serving as raw material
  • Method for preparing diesel from coal tar serving as raw material

Examples

Experimental program
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Embodiment 1

[0031] Put the filtered coal tar in the storage tank for dehydration, maintain the temperature at 70°C, let it stand for 36 hours to separate the coal tar and water, then pressurize to 490KPa, heat to 130°C, and complete the final dehydration in a special dehydration tank. Dehydration, the separated water is discharged in liquid form. The dehydrated coal tar is distilled and separated into fractions ≥370°C and fractions <370°C.

[0032] The distillate oil below 370°C is mixed with hydrogen and enters the hydrofinishing reaction zone, where it contacts with the hydrofinishing catalyst. The hydrofinishing unit adopts a gas / liquid co-current downflow reactor and operates under the following reaction conditions: reaction temperature 360°C , the pressure is 8MPa, the volume ratio of hydrogen to oil is 500:1, and the space velocity is 0.7h -1 . Qualified diesel components are obtained after hydrorefining.

[0033] Add 3 parts of 2-methylbutyl nitrate, 2 parts of 2-methoxybutyl ni...

Embodiment 2

[0043] Put the filtered coal tar in the storage tank for dehydration, maintain the temperature at 80°C, let it stand for 48 hours to separate the coal tar and water, then pressurize to 980KPa, heat to 155°C, and complete the final dehydration in a special dehydration tank. Dehydration, the separated water is discharged in liquid form. The dehydrated coal tar is distilled and separated into fractions ≥370°C and fractions <370°C.

[0044] The distillate oil below 370°C is mixed with hydrogen into the hydrofinishing reaction zone and contacted with the hydrofinishing catalyst. The hydrofinishing device adopts a gas / liquid co-current downflow reactor and operates under medium pressure conditions. The reaction conditions are: The reaction temperature is 370°C, the pressure is 10MPa, the volume ratio of hydrogen to oil is 1300:1, and the space velocity is 0.9h -1 . Qualified diesel components are obtained after hydrorefining.

[0045] Add 2 parts of 2-methylbutyl nitrate, 1 part ...

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Abstract

The invention relates to a method for preparing diesel from coal tar serving as a raw material, which mainly comprises the following steps of: successively carrying out filtration to remove impurities, stationary dehydration, secondary dehydration, effluent fraction and hydrofining on the coal tar so as to obtain diesel components; and then adding diesel additive components into the diesel components, and mixing the components so as to obtain the diesel, wherein the diesel additive components comprise hexadecane number improvers, low temperature flow improvers, flame accelerators and cosolvents. The method has the advantages of rich raw material sources, high process universality, simple operation, mild reaction conditions, low energy consumption, good separation effect and no environmental pollution; and meanwhile, the blending diesel produced by the method has the advantages of high hexadecane number, high combustion performance, proper viscosity, high safety performance, and the like, therefore, the method has good market application prospect.

Description

technical field [0001] The invention relates to a method for producing diesel oil by using coal tar as a raw material, in particular to a method for preparing diesel oil components by using coal tar as a main raw material, and then adding diesel oil additives to prepare diesel oil. Background technique [0002] With the development of the economy, my country's demand for oil resources is increasing, and the trend of tight supply of oil has become increasingly obvious in recent years. my country is a big country with relatively rich coal resources, and it is also a big coke producer. Since 1993, my country's coke production has been ranking first in the world. Since the beginning of the 21st century, with the development of the iron and steel industry, coke production has increased year by year, and by 2003 it had exceeded 150 million tons. There are more than 5 million coal tars that are directly consumed as fuel without further processing in the country every year. tons, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14C10L1/04C10L1/23C10L1/197C10L1/185C10L1/182
Inventor 车春玲
Owner JINAN DEV ZONE XINGHUO SCI & TECH RES INST
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