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Method for producing high-octane gasoline from aromatic raffinate
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A technology for high-octane gasoline and raffinate oil, which is applied in the field of hydrocarbon isomerization and can solve the problems of low ethylene yield and large waste gas output.
Active Publication Date: 2020-03-24
CHINA PETROLEUM & CHEM CORP +1
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However, there are some shortcomings as a raw material for ethylene cracking, such as low ethylene yield and a large amount of waste gas.
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preparation example Construction
[0025] The preparation method of the catalyst containing zeolite is as follows: molding a predetermined amount of zeolite and alumina to obtain a carrier. The molding method is preferably extrusion molding, and the carrier after molding is supported by a conventional method, such as an impregnation method, to support Group VIII metals to obtain a catalyst.
[0026] The described solid superacid catalyst for isomerization comprises 0.05-2.0% by mass of Group VIII metal components and 98-99.95% by mass of sulfate-containing zirconia carriers, and the sulfur content in the catalyst is calculated as elemental sulfur 0.5-4.0% by mass.
[0027]Preferably, the solid superacid catalyst comprises 0.05 to 2.0% by mass of Group VIII metal components and 98 to 99.95% by mass of sulfate-containing mixed oxide supports, and the mixed oxide supports contain 50 to 70% by mass aluminum oxide and 30-50% by mass of zirconia, and the sulfur content in the solid superacid catalyst is 0.5-3.5% by m...
example 1
[0040] The benzene raffinate shown in Table 1 is sent to the deisohexane tower for rectification. The number of theoretical plates in the rectification tower is 63. The controlled operating pressure and temperature and the composition of the tower top, side stream and tower bottom fraction obtained are shown in the table 2.
[0051] The benzene raffinate shown in Table 3 is sent to the deisohexane tower for rectification. The number of theoretical plates in the rectification tower is 71. The controlled operating pressure and temperature and the obtained tower top, side line and tower bottom compositions are shown in Table 4. .
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Abstract
The invention relates to a method for producing high-octane-number gasoline from aromatic hydrocarbon raffinate oil. The method comprises that aromatic hydrocarbon raffinate oil is fed into an isohexane removing tower (2), C7<+>-rich tower bottom components are discharged from the tower bottom, dimethylbutane-rich tower top components are discharged from the tower top, side stream components richin monomethylpentane and n-hexane are discharged from the side stream, the side stream components contact an isomerization catalyst, and an isomerization reaction is performed at a temperature of 120-280 DEG C under a pressure of 1.0-3.5 MPa according to a hydrogen / hydrocarbon molar ratio of 0.1-6.0. According to the present invention, with the method, the low-octane-number component is subjectedto the isomerization reaction so as to effectively improve the octane number of the aromatic hydrocarbon raffinate oil.
Description
technical field [0001] The invention relates to a hydrocarbon isomerization method, specifically, a method for producing high-octane gasoline by isomerization reaction using aromatic hydrocarbon raffinate oil as raw material. Background technique [0002] With the increasingly stringent environmental protection requirements, environmental pollution has become a restrictive factor for economic development. The quality specifications of motor gasoline products are getting higher and higher. On January 1, 2017, the Beijing VI motor gasoline standard began to be implemented. In 2019, the national motor gasoline quality will be upgraded to the National VI standard. In the new standard, the content of aromatics and olefins in gasoline is subject to stricter restrictions. More high-octane isomerized alkanes must be added to motor gasoline to compensate for the resulting octane loss. From the perspective of product blending, increasing the proportion of isomerized gasoline will in...
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