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Method of preparing butadiene from gasoline

A technology for butadiene and gasoline, applied in the field of preparing butadiene, can solve problems such as low yield of butadiene, and achieve the effects of low yield of methane, high yield and reduced energy consumption

Active Publication Date: 2015-02-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the invention is to provide a method for preparing butadiene from gasoline in order to overcome the low defect of butadiene yield in the existing butadiene preparation process

Method used

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  • Method of preparing butadiene from gasoline

Examples

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Embodiment 1

[0051] This example is used to illustrate the method for preparing butadiene from gasoline of the present invention.

[0052] (1) Hydrogenation

[0053] The pyrolysis gasoline (the physical parameters are shown in Table 2 below) is directly hydrogenated and used as the cracking raw material. The hydrogenation process is as follows: the hydrogenation of the pyrolysis gasoline is carried out in four hydrogenation reactors, the first one is the hydrogenation of diolefins reactors, the second is a mono-olefin hydrogenation reactor, and the third and fourth are aromatic hydrogenation reactors connected in series. In the diolefin hydrogenation reactor, the catalyst used is LY-9801 (purchased from the Chemical Research Institute of Lanzhou Petrochemical Company, the Pd content is 0.3% by weight, and the carrier is Al 2 o 3 ), the reactor inlet temperature is 60°C, the absolute pressure is 2.6MPa, the molar ratio of hydrogen to oil is 0.6, and the volumetric space velocity of pyroly...

Embodiment 2

[0066] This example is used to illustrate the method for preparing butadiene from gasoline of the present invention.

[0067] Carry out hydrogenation and steam cracking according to the method for embodiment 1, difference is, in steam cracking process, the mixture that hydrogenation reaction product mixes with naphtha with the weight ratio of 1:1 injects CBL-III type cracking furnace (purchased from China Petrochemical Corporation) for steam cracking reaction.

[0068] The cracked gas was analyzed according to the method of Example 1, and the yield of butadiene and the yield of methane were calculated, and the results are shown in Table 6 below. Then, the cracked gas was separated according to the method of Example 1, and the energy consumption of the cold box was recorded, and the results are shown in Table 6 below.

Embodiment 3

[0070] This example is used to illustrate the method for preparing butadiene from gasoline provided by the present invention.

[0071] Carry out hydrogenation and steam cracking according to the method for embodiment 1, difference is, in steam cracking process, the mixture that hydrogenation reaction product mixes with naphtha with the weight ratio of 1:4 injects CBL-III type cracking furnace (purchased from China Petrochemical Corporation) for steam cracking reaction.

[0072] The cracked gas was analyzed according to the method of Example 1, and the yield of butadiene and the yield of methane were calculated, and the results are shown in Table 6 below. Then, the cracked gas was separated according to the method of Example 1, and the energy consumption of the cold box was recorded, and the results are shown in Table 6 below.

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Abstract

The method discloses a method of preparing butadiene from gasoline. The method takes a hydrogenation reaction product as at least part of a cracking raw material to carry out steam cracking reactions, wherein the hydrogenation product is prepared according to at least one method picked from following two methods: (1) method one, carrying out hydrogenation reactions with gasoline, whose aromatic hydrocarbon mass content is larger than 12%; (2) method two, separating at least one component of a C6 fraction, a C7 fraction, and a C8 fraction from gasoline, whose aromatic hydrocarbon mass content is larger than 12%, and then subjecting the separated fraction to carry out hydrogenation reactions. The method provided by the invention of preparing butadiene from gasoline has a high yield of butadiene and a low yield of methane, and thus the energy consumption of the cooling box in the separation process of cracking gas is reduced.

Description

technical field [0001] The present invention relates to a method for preparing butadiene from gasoline. Background technique [0002] Butadiene usually refers to 1,3-butadiene, also known as vinyl ethylene, which is an important petrochemical basic raw material next to ethylene and propylene. Butadiene is mainly used in synthetic rubber and resins, such as polybutadiene rubber (BR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), styrene-butadiene polymer latex, styrene thermoplastic elastomer (SBC) and Acrylonitrile-butadiene-styrene (ABS) resin. In addition, butadiene can also be used to produce organic chemical products such as adiponitrile, hexamethylenediamine, nylon-66, and 1,4-butanediol, which are widely used in many fields. [0003] For the preparation of butadiene, the traditional method is to steam crack raw materials such as light hydrocarbons, naphtha, and hydrogenated tail oil. However, the main products in the steam cracking process are ethylene, prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/167C07C4/04
Inventor 王国清张勇杜志国戴伟石莹李东风彭晖乐毅
Owner CHINA PETROLEUM & CHEM CORP
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