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Isomerization method of aromatic hydrocarbon raffinate oil

A technology of isomerization and raffinate, applied in the field of isomerization of light hydrocarbons, can solve the problem of large investment in equipment

Active Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts two sets of parallel reaction systems for different raw material properties, and the initial investment in equipment is relatively large.

Method used

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  • Isomerization method of aromatic hydrocarbon raffinate oil
  • Isomerization method of aromatic hydrocarbon raffinate oil
  • Isomerization method of aromatic hydrocarbon raffinate oil

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Experimental program
Comparison scheme
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preparation example Construction

[0026] The preparation method of the above-mentioned zeolite-containing catalyst is: forming a predetermined amount of zeolite and alumina to obtain a carrier. The forming method is preferably extrusion forming. After the forming, the carrier is supported by a conventional method, such as impregnation, to obtain the catalyst.

[0027] The solid super acid catalyst used for the isomerization reaction includes 0.05-2.0% by mass of group VIII metal components and 98-99.95% by mass of sulfate-containing zirconia carrier, and the sulfur content in the catalyst is calculated as sulfur It is 0.5-4.0% by mass.

[0028] Preferably, the solid super acid catalyst comprises 0.05-2.0% by mass of group VIII metal components and 98-99.95% by mass of a mixed oxide carrier containing sulfate groups, and the mixed oxide carrier contains 15-70% by mass And 30-85% by mass of zirconia, and the sulfur content in the solid super acid catalyst is 0.5-3.5% by weight in terms of element sulfur.

[0029] The ...

example 1

[0044] The benzene extraction raffinate shown in Table 1 is sent to the isohexane removal tower for rectification. The theoretical plate number of the removal isohexane tower is 63. The content of the top and bottom components obtained by the rectification and the research octane See Table 2 for the value, the pressure controlled by tower operation, and the temperature at the top and bottom of the tower.

[0045] Send the bottom components of the isohexane removal tower shown in Table 2 to C removal 7 Rectification tower to remove C 7 The theoretical plate number of the tower is 50, and the obtained component content at the top and bottom of the tower, the research octane number, the controlled operating pressure, and the temperature at the top and bottom of the tower are shown in Table 3.

[0046] Table 1

[0047] Hydrocarbon component Content, mass% C3

0.00 i-C 4

0.00 n-C 4

0.00 i-C 5

1.56 n-C 5

2.41 CP1.52 C5＝

0.36 22DMB5.78 23DMB4.99 2MP22.32 3MP16.89 n-C 6

22.73 C6＝...

example 2

[0054] The benzene raffinate shown in Table 4 is sent to the isohexane removal tower for rectification. The theoretical plate number of the removal isohexane tower is 71. The content of the top and bottom components obtained by the rectification and the research octane number, See Table 5 for tower operation control pressure, tower top and bottom temperature.

[0055] Send the bottom components of the isohexane removal tower shown in Table 5 to the C removal 7 Rectification tower to remove C 7 The theoretical plate number of the tower is 60, and the content of the top and bottom components and the research octane number, the controlled operating pressure, and the temperature of the top and bottom are shown in Table 6.

[0056] Table 4

[0057] Hydrocarbon component Content, mass% C3

0.00 i-C 4

0.00 n-C 4

0.02 i-C 5

2.25 n-C 5

2.31 CP0.03 C5＝

0.36 22DMB3.47 23DMB3.00 2MP13.40 3MP10.14 n-C 6

12.11 C6＝

4.72 MCP1.13 B0.02 CH0.07 C7+

46.97

[0058] table 5

[0059]

[0060] T...

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Abstract

The invention discloses an isomerization method of aromatic hydrocarbon raffinate oil. The method comprises: 1) feeding aromatic hydrocarbon raffinate oil into an isohexane removal tower (2), carryingout rectification to obtain a dimethyl butane-rich tower top component, feeding the tower bottom component into a C7 removal tower (3), carrying out rectification, discharging a monomethyl pentane-rich and n-hexane-rich component from the tower top, and discharging a C7<+>-rich component from the tower bottom; 2) making the tower top component discharged from the C7 removal tower contact an isomerization catalyst, and carrying out an isomerization reaction at a temperature of 120-280 DEG C under a pressure of 1.0-3.5 MPa at a hydrogen / hydrocarbon molar ratio of 0.1-6.0; and 3) carrying out gas-liquid separation on the isomerization reaction product, and returning the obtained liquid phase product to the isohexane removal tower. According to the method of the invention, the low octane number component in the raffinate oil is subjected to an isomerization reaction so as to effectively improve the octane number of aromatic hydrocarbon raffinate oil.

Description

Technical field [0001] The present invention is a light hydrocarbon isomerization method, specifically, a method for producing high-octane gasoline through isomerization reaction using aromatic hydrocarbon raffinate as a raw material. Background technique [0002] With the increasingly stringent requirements for environmental protection, environmental pollution has become a restrictive factor for economic development. The quality specifications of automotive gasoline products are getting higher and higher. On January 1, 2017, the Beijing VI automotive gasoline standard was implemented. In 2019, the national automotive gasoline quality will be upgraded to the National VI standard. A prominent feature of the new standard is that it restricts the content of olefins more strictly. In the gasoline pool, the carbon number distribution of olefins is mainly concentrated in C 5 And C 6 . Urgent need to introduce new, high-octane C 5 , C 6 Components to make up for this part of the octa...

Claims

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Application Information

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IPC IPC(8): C10G55/06
CPCC10G55/06
Inventor 秦岭张秋平于中伟马爱增
Owner CHINA PETROLEUM & CHEM CORP