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A deep processing technology for coking washing oil

A deep processing and oil washing technology, which is applied in the chemical industry and can solve the problems of large investment in equipment

Inactive Publication Date: 2011-12-07
LIAONING INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the washing oil processing technology of Xindaihua, it can be seen that its technology is more advanced and the product quality is better, but the disadvantage is that the investment in equipment is large, and only the production of β-methylnaphthalene is in addition to a tower for the production of mixed methylnaphthalene fractions. Two rectification towers, the methylnaphthalene tower and the β-methylnaphthalene tower, are also needed

Method used

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  • A deep processing technology for coking washing oil
  • A deep processing technology for coking washing oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 The washing oil treatment capacity is 10,000 tons / year

[0028] There are three Φ900 valve towers with 81 trays, and three cylindrical tube furnaces with a heat load of 1 million kcal / hour. The feed rate of raw material washing oil is 1500kg / h.

[0029] Such as figure 1 As shown, the steam heat exchange between the raw material wash oil and the top naphthalene oil reaches 180°C-200°C and then enters the first rectification tower from the middle. The temperature at the top of the tower is kept at 220°C-222°C. 84% (chromatographic method); the β-methylnaphthalene fraction is extracted from the upper side line (the 12th tray from top to bottom), and the extraction temperature is 237°C-238°C, containing 72% of β-methylnaphthalene , α-methylnaphthalene 6.5%; the temperature at the bottom of the tower is kept at 297°C-298°C. The gas phase pressure at the bottom of the tower is 42KPa.

[0030] The residual oil at the bottom of the first tower and the acenaphthene...

Embodiment 2

[0032] Example 2 The washing oil treatment capacity is 15,000 tons / year

[0033] There are three Φ1000 valve towers with 81 trays, and three cylindrical tube furnaces with a heat load of 1.2 million kcal / hour. The feed rate of raw material washing oil is 2100kg / h.

[0034] The steam heat exchange between the raw material washing oil and the top naphthalene oil reaches 180°C-200°C and then enters the first rectification tower from the middle. Chromatography); the β-methylnaphthalene fraction is extracted from the upper side line (the 12th tray from top to bottom), and the extraction temperature is 237°C-238°C, containing 71% of β-methylnaphthalene, α- Methyl naphthalene 7%; the temperature at the bottom of the tower is kept at 297°C-298°C. The gas phase pressure at the bottom of the tower is 40KPa.

[0035] The residual oil at the bottom of the first tower and the acenaphthene raffinate are mixed at a ratio of 4:1 and then enter the second rectification tower. The temperatur...

Embodiment 3

[0037] Embodiment 3 washing oil treatment capacity 20000 tons / year

[0038] Three float valve towers of Φ1200 have 81 trays, and three cylindrical tube furnaces with a heat load of 1.4 million kcal / hour. The feed rate of raw material washing oil is 2800kg / h.

[0039] The steam heat exchange between the raw material washing oil and the top naphthalene oil reaches 180°C-200°C and then enters the first rectification tower from the middle. Chromatography); the β-methylnaphthalene fraction is extracted from the upper side line (the 12th tray from top to bottom), and the extraction temperature is 237°C-238°C, containing 71% of β-methylnaphthalene, α- Methyl naphthalene 7%; the temperature at the bottom of the tower is kept at 297°C-298°C. The gas phase pressure at the bottom of the tower is 40KPa.

[0040] The residual oil at the bottom of the first tower and the acenaphthene raffinate are mixed at a ratio of 4:1 and then enter the second rectification tower. The temperature at t...

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Abstract

The invention relates to a deep processing technology for coking wash oil. The coking wash oil serving as a raw material passes through three continuous rectification towers respectively provided with a side extraction port in sequence, so that a naphthalene fraction with naphthalene content of more than 80 percent, a beta-methyl naphthalene fraction with beta-methyl naphthalene content of more than 70 percent, an alpha-methyl naphthalene fraction with alpha-methyl naphthalene content of more than 60 percent, medium wash oil, an acenaphthene fraction with acenaphthene content of more than 60 percent, a dibenzofuran fraction with dibenzofuran content of more than 55 percent and a fluorene fraction with fluorene content of more than 50 percent can be extracted at one step. The technology iseasy to operate and low in equipment investment, has various types of product fractions, provides great convenience for further obtaining industrial products of naphthalene, beta-methyl naphthalene, alpha-methyl naphthalene, acenaphthene, fluorene and the like, and is particularly suitable for being matched with wash oil fraction deep processing of coal tar processing enterprises with scale of 15-30 megatons / year.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a deep processing technology of coking washing oil. Background technique [0002] Washing oil is a complex mixture rich in valuable quinoline, isoquinoline, indole, α-methylnaphthalene, β-methylnaphthalene, biphenyl, dimethylnaphthalene, acenaphthene, oxyfluorene and fluorene Organic chemical raw materials. These organic chemical raw materials are important intermediates for the synthesis of dyes, pigments, medicines, and polymer materials, and this precious resource needs to be rationally and comprehensively utilized. [0003] At present, there are about 30 domestic coal tar processing enterprises with a processing capacity of more than 100,000 tons / year, and most of them have a processing capacity of 150,000 to 300,000 tons / year. The oil washing production capacity of each enterprise is average. At 10,000-20,000 tons / year, the geographical distribution of each enter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/08C10C1/12C10C1/14
Inventor 鄂永胜鄢景森代文双刘志君高伟
Owner LIAONING INST OF SCI & TECH
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