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Coal tar hydrogenation upgrading method

A technology of hydrogenation upgrading and coal tar, which is applied in the field of energy technology and environmental protection, can solve the problems of low gasoline and diesel yield, environmental pollution, and low added value, so as to reduce the colloid content, avoid secondary pollution, and improve Yield effect

Inactive Publication Date: 2013-01-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the purpose of rational utilization of resources and environmental protection, there are many disadvantages in the coal tar process, such as serious environmental pollution, low added value, low yield of gasoline and diesel, etc., through the organic combination of catalytic distillation, delayed coking and hydrofining. Utilize coal tar as a resource and convert it into gasoline and diesel with high added value and high yield

Method used

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  • Coal tar hydrogenation upgrading method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Gas-phase catalytic cracking of coal tar over a molecular sieve / alumina catalyst. The heavy oil is injected into a catalytic distillation column equipped with a molecular sieve / alumina catalyst for catalytic distillation. The catalyst is composed of alumina containing 35% ZSM-48 and 15% mordenite, and a columnar product of 2.0-3.0 mm is obtained by bonding , length 3-8 mm, bulk density 0.65-0.80 g / mL, strength greater than 40 N / mm. The waste residue and gas generated during the waste plastic oil conversion process are used for heating, and the agent-oil ratio is controlled between 1-20. The gas produced is used to heat the distillation column. See Table 1 below for catalytic distillation material balance test results

[0021]

raw material

water content

50% light oil

heavy oil

Catalyst adsorption

gas + loss

quality

2000

60

1000

740

100

100

percentage%

3

50

37

5 ...

Embodiment 2

[0024] Example 2: Heavy oil was delayed coking to obtain light oil. See Table 3 below for delayed coking material balance test results

[0025]

Embodiment 3

[0026] Example 3: The supported nickel molybdenum sulfide catalyst is a hydrorefining catalyst. The carrier adopts SiO 2 -Al 2 o 3 , the specific surface area is 200-400 m 2 / g, the pore volume is 0.5-2.0 cm 3 / g, the most probable pore size distribution is 2-4 nm and 10-15nm. The precursor of nickel molybdenum sulfide is nickel nitrate or nickel acetate and ammonium thiomolybdate. The supported nickel-molybdenum sulfide catalyst was prepared through the steps of impregnation-drying-calcination by equal volume impregnation method. The following table 4 sees reaction process conditions and product composition.

[0027]

[0028] As can be seen from Table 4, the oil fraction is 340% on the supported nickel-molybdenum sulfide catalyst. o Above C, 8MPa hydrofining can effectively remove sulfur and nitrogen, and greatly reduce colloids, indicating that the supported nickel-molybdenum sulfide catalyst has a good ability to remove heteroatoms, and the obtained product is wat...

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Abstract

The invention discloses a coal tar hydrogenation upgrading method belonging to the technical fields of coal chemical industry and energy. The coal tar hydrogenation upgrading method is characterized by comprising the following steps: performing catalytic distillation cracking on coal tar, and then dividing into light oil and heavy oil; performing delayed coking on the heavy oil, and then performing further catalytic distillation on the heavy oil mixed with the coal tar or hydrofining the heavy oil together with the light oil; and distilling the reaction product to obtain high-grade gasoline and diesel distillate oil. A catalytic distillation catalyst and a sulfide catalyst used in the method are prepared by selecting appropriate carriers and active components through a liquid phase method according to the composition and property of the coal tar. The invention has the advantages of simple process, high catalyst activity and selectivity and high gasoline and diesel yield, provides a new way for the utilization of the coal tar, and has favorable economic benefits and industrial application prospects.

Description

technical field [0001] The invention belongs to the fields of energy technology and environmental protection, and relates to a method for hydrogenation and upgrading of coal tar. Background technique [0002] In the process of coal chemical industry, coal tar is one of the important products of coking industry, its output accounts for about 3%~4% of the furnace coal, its composition is extremely complex, and its annual output is about 15.00 Mt. According to the different coal carbonization temperature, it can be divided into high-temperature coal tar, medium-temperature coal tar and low-temperature coal tar. The composition and properties of the three are different, and their processing and utilization methods are different. At present, part of the high-temperature coal tar is used to extract chemical products, most of the medium / low temperature coal tar and a small amount of high-temperature coal tar are used as fuel for extensive combustion. Because coal tar contains a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCY02P20/10
Inventor 梁长海李闯陈霄汪镭肖子辉
Owner DALIAN UNIV OF TECH
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