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Method for separating pseudocumene from C9 aromatic hydrocarbon

A technology for carbon 9 aromatics and metatrimethylbenzene is applied in the field of separation of metatrimethylbenzene, which can solve the problems of low productivity and high production cost of metatrimethylbenzene, and achieve the effects of avoiding stratification, good compatibility and low investment.

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] In order to solve the problems of low production rate and high production cost of trimethylbenzene in the prior art, the invention provides a method for separating trimethylbenzene from C9 aromatic hydrocarbons, which has high productivity and high yield of trimethylbenzene, and the production equipment is The advantage of requiring fewer plates

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  • Method for separating pseudocumene from C9 aromatic hydrocarbon
  • Method for separating pseudocumene from C9 aromatic hydrocarbon
  • Method for separating pseudocumene from C9 aromatic hydrocarbon

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Embodiment 1～6

[0039] Carry out by the above-mentioned method for separating unisexamethylene from C9 aromatic hydrocarbons, and concrete process condition, parameter and used catalyzer are shown in Table 3 and Table 4.

[0040] The C9 C9 aromatic hydrocarbon mixture used in the embodiment of the present invention is a reformed C9 aromatic hydrocarbon fraction, which contains 45.2% (weight) of trimethylbenzene, and its specific components and contents are shown in Table 1.

[0041] Table 1 Composition and boiling point of raw materials of C9 aromatics

[0042] component name

[0043] The yield of C9 aromatics raw material obtained by separation of trimethylbenzene is calculated by the following formula:

[0044]

[0045] The separation process condition and separation result of embodiment 1-6 are listed in table 2-4 respectively

[0046]

[0047]

[0048] Table 4 embodiment 1-6 separation result

[0049] Example

[0050] Can find out from above result: accordin...

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Abstract

The invention discloses a method for separating pseudocumene from C9 aromatic hydrocarbon, which is characterized in that an accelerator is added during the rectification process, the accelerator is one of dimethyl carbonate or diethyl carbonate. The method comprises the following steps: 1) a C9 aromatic hydrocarbon mixture and the accelerator are mixed and introduced in a lightness-removing tower, a light component is elicited by the lightness-removing tower, a heavy component is elicited by a tower kettle; 2) the light component in the step 1) is introduced in a first accelerator removal tower, the accelerator is elicited from the top of the tower, the light component material flow is elicited by the tower kettle; 3) the heavy component and the accelerator in the step 1) are mixed and then introduced in a weight-removing tower, the material flow is respectively elicited from the tower top and the tower kettle; 4) the material flow elicited from the weight-removing tower in the step 3) is introduced in a second accelerator removal tower, the accelerator is elicited from the top of the tower, the pseudocumene product can be elicited from the tower kettle. The obtained pseudocumene has the advantages of high productivity and high yield, the production apparatus requires less plate number.

Description

technical field [0001] The invention relates to the field of organic chemical industry, and furthermore, relates to a method for separating unisexylene from C9 aromatic hydrocarbons. Background technique [0002] It is widely used in the fields of paint making, coating, synthetic resin, resin processing, medicine and cosmetics, and is an important fine chemical raw material. Due to the high content of mesitylene in the reformed C9 aromatics, at present, domestic and foreign manufacturers basically use the reformed C9 aromatics as raw materials to obtain the mesitylene products through rectification. [0003] Chinese patent CN1313269 discloses a method for separating trimethylene from C9 aromatic hydrocarbons. The method adopts double-tower precision rectification technology, and can obtain trimethylbenzene with a purity greater than 99%, and its yield can reach 85%, but the inventor has not given specific operating process parameters. The rate is lower. [0004] In the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/02C07C7/05
Inventor 冯海强朱跃辉高继东赵开径鲁耘胡競民
Owner CHINA PETROLEUM & CHEM CORP
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