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Process for extracting cyclopentane by hydrofining crude benzene containing dicyclopentadiene

A dicyclopentadiene, hydrogenation and refining technology, applied in the field of coal chemical industry, can solve problems such as cyclopentane research that has not been reported, and achieve the effects of increasing added value, easy control of reaction heat, and avoiding coking

Active Publication Date: 2021-03-16
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no report on the research on the hydrogenation of crude benzene containing dicyclopentadiene to extract cyclopentane

Method used

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  • Process for extracting cyclopentane by hydrofining crude benzene containing dicyclopentadiene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After the raw material is filtered, it enters the weight removal tower 2 from the buffer tank 1, removes heavy components above carbon 9 at the bottom of the weight removal tower 2, and simultaneously pyrolyzes dicyclopentadiene to generate cyclopentadiene, which is separated from the top of the weight removal tower 2 The After mixing with hydrogen, it enters the first-stage hydrogenation reactor 3 from top to bottom, and the first-stage hydrogenation becomes a Ni-S reduction catalyst at a reaction temperature of 10°C, a pressure of 4.0MPa, and a space velocity of 2.0h -1, the reaction is carried out under the condition of hydrogen oil volume ratio of 400:1, the diolefins in the pre-saturated benzene component I, and cyclopentadiene are hydrogenated to generate cyclopentene and cyclopentane; after hydrogenation, the pre-benzene component I and recombined Part II is mixed with hydrogen, heat exchanged by a heat exchanger, and then enters the second-stage hydrogenation re...

Embodiment 2

[0025] The raw material 2 enters the weight removal tower 2 from the buffer tank 1 after being filtered, and the heavy components above carbon 9 are removed in this unit, and at the same time, dicyclopentadiene is pyrolyzed to produce cyclopentadiene, which is separated by distillation and separated in the weight removal tower 2 The benzene pre-component I at -1 , the hydrogen oil volume ratio is 800:1 for the reaction, the diolefins in the pre-saturated benzene component I, cyclopentadiene are hydrogenated to generate cyclopentene and cyclopentane; after hydrogenation, the pre-benzene component I, heavy component II and Hydrogen is mixed, heat exchanged by a heat exchanger, and then enters the second-stage hydrogenation reactor 4 from top to bottom. The second-stage hydrogenation reaction is Ni-Mo in a sulfided state. The reaction conditions are temperature 190 ° C, pressure 2.0 MPa, space velocity 0.5h -1 , Hydrogenation at a volume ratio of 800:1 to hydrogen oil; the remain...

Embodiment 3

[0027] The raw material 3 enters the weight removal tower 2 from the buffer tank 1 after being filtered, and the heavy components above carbon 9 are removed in this unit, and at the same time, dicyclopentadiene is pyrolyzed to produce cyclopentadiene. The benzene pre-component I at -1 , the hydrogen oil volume ratio is 600:1 to react, the diolefins in the component I before saturated benzene, cyclopentadiene are hydrogenated to generate cyclopentene and cyclopentane; after hydrogenation, the component I before benzene, the heavy component II and Hydrogen is mixed, heat exchanged by a heat exchanger, and then enters the second-stage hydrogenation reactor 4 from top to bottom. The second-stage hydrogenation reaction is Ni-Mo in a sulfide state. The reaction conditions are temperature 170°C, pressure 3.0MPa, space velocity 1.0h -1 , Hydrogenation at a hydrogen oil volume ratio of 600:1; unsaturated olefins left in the saturated first-stage hydrogenation; the components after the ...

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Abstract

The invention discloses a process for extracting cyclopentane by hydrofining dicyclopentadiene-containing crude benzene, which comprises the following steps: carrying out pretreatment, hydrofining, cyclopentane distillation refining and aromatic hydrocarbon separation and refining on a dicyclopentadiene-containing crude benzene raw material to separate cyclopentane with the purity of more than 99.9%, refined benzene with the sulfur content of less than 0.5 ppm, toluene and mixed xylene, thereby maximizing the product value. The maximum economic benefit of the process is realized.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a process for extracting cyclopentane through hydrogenation refining of crude benzene containing dicyclopentadiene. Background technique [0002] Crude benzene containing dicyclopentadiene is a by-product of new coal chemical industries such as coal-to-natural gas, coal-to-oil, and coal-to-methanol. It is mainly composed of aromatics, dicyclopentadiene, and alkanes, with a boiling range of 40~180°C . The content of dicyclopentadiene in this kind of crude benzene is about 12%, the content of pure benzene accounts for 25%, the content of toluene and xylene is about 10%, and the content of olefins is 40~90gBr 2 / 100g, the diene value is 5~15gI 2 / 100g, the sulfur content exceeds 3000ppm. This kind of crude benzene contains a large amount of high value-added petrochemical products such as dicyclopentadiene and aromatics. Dicyclopentadiene is pyrolyzed to...

Claims

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Application Information

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IPC IPC(8): C07C5/03C07C7/04C07C13/10C07C7/167C07C7/08C07C15/04C07C15/06C07C15/08C07C4/22C07C13/15C07C5/05C07C13/12
CPCC07C5/03C07C7/04C07C7/167C07C7/08C07C4/22C07C5/05C07C2601/08C07C2601/10C07C2527/043C07C2527/051C07C13/15C07C13/12C07C13/10C07C15/04C07C15/06C07C15/08Y02P20/10
Inventor 张先茂夏大寒王瑜王泽王国兴陈凯王栋斌金建涛郑峰伟周正瞿玖
Owner WUHAN KELIN FINE CHEM
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