A method for catalytic reaction rectification separation and cracking of carbon five and its catalytic reaction rectification tower

Abstract

The invention relates to a catalytic reaction rectification method for separating and cracking carbon five and a catalytic reaction rectification tower thereof. The method comprises the following steps: (1) Adding cracked C5 raw materials into the catalytic reaction section of the catalytic reaction rectification tower, contacting with the catalyst installed on the tray for catalytic reaction, the dicyclopentadiene and piperylene produced And other heavy components in the raw material are concentrated downward through the stripping section and enter the tower kettle, and the dicyclopentadiene product is obtained through the piperylene separation tower and the carbon six separation tower; (2) light isoprene-based The components are refined from the catalytic reaction section upwards through the rectification section and enter the top condenser. After condensation, they are extracted and separated by the extraction tower to obtain the isoprene product. The addition of the high-efficiency catalyst of the invention reduces the reaction conditions, makes the reaction easier, and the reaction speed increases rapidly. Under the same conditions, compared with the ordinary rectification column: the conversion rate increased by 5.57%, and the yield increased by 5.49%.

Description

technical field [0001] The invention relates to a method for catalytic reaction rectification, separation and cracking of carbon five and a catalytic reaction rectification tower. Background technique [0002] In the process of producing ethylene from petroleum cracking, a large number of by-product C5 fractions will be produced. These C5 fractions can account for 15% to 20% of the ethylene production. The C5 fractions are rich in isoprene, cyclopentadiene and piperylene Alkenes and other diolefins account for about 40% to 60% of the C5 fraction. These diolefins are active in chemical properties and are important chemical raw materials. With the continuous increase of ethylene production, making full use of this part of resources is of great significance to reduce the cost of ethylene plants and comprehensively utilize petroleum resources. [0003] The traditional process for separation of C5 fractions usually starts with the thermal dimerization of cyclopentadiene to conve...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for catalytic reaction rectification separation and cracking of carbon five and a catalytic reaction rectification tower for the problems of short residence time and low conversion rate in the application of current reactive distillation technology to the separation process of carbon five

This method adds a high-efficiency catalyst on the basis of the original reactive distillation to form a catalytic reactive distillation. By installing a preset bolt assembly on the tray, a fixed ring, and the catalyst is packaged in the fixed frame, and the height of the catalyst is adjusted through the nut, Thereby solving the problem of catalytic reaction and rectification separation and segmentation, as well as the problem of catalyst installation and fixation

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