Method for separating and refining etherification material from catalytic cracking gasoline

A technology for catalytic cracking of gasoline and refining ether, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc. It can solve the problems of poor removal effect, achieve the effects of preventing poisoning, shortening the process flow, and prolonging the service life

Inactive Publication Date: 2004-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

This method can only remove a small amount of the above-mentioned impurities, and the removal effect is not good

Method used

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  • Method for separating and refining etherification material from catalytic cracking gasoline

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Effect test

preparation example Construction

[0018] The preparation method of the solid denitrification adsorbent loaded with metaphosphoric acid is to mix the porous carrier and phosphoric acid in a ratio of 2 to 5:1 by solid-liquid mass ratio, and the amount of phosphoric acid used should make the amount of metaphosphoric acid in the solid denitrification agent reach 20-5:1. 40% by weight. The porous carrier and phosphoric acid are mixed in proportion, impregnated at room temperature for 1-10 hours, and calcined at 300-500° C. for 1-6 hours.

[0019] The denitrification adsorbent can be used for repeated regeneration, and the regeneration method is a low-temperature solvent regeneration method, that is, the solution mixed with toluene and methanol in a ratio of 1:5 is used as a solvent, and the liquid-solid ratio is 3 to 10: The ratio of 1 is soaked at 10-40°C for 2-24 hours, and the operation is repeated 1-3 times, and the performance of the denitrification agent can be restored.

[0020] The active component of the ...

example 1

[0028] The effect of catalytic distillation sweetening was investigated with FCC whole fraction gasoline as raw material, and the mercaptan content in gasoline was determined by potentiometric titration. The properties of raw materials are shown in Table 1.

[0029] The experiment uses a small fractionation column filled with stainless steel triangular packing. The tower height is 600 mm, the inner diameter is 25 mm, and the volume of the tower kettle is 3 liters. The feed inlet of the distillation tower is 250 millimeters away from the tower still, and 30 grams of sweetening catalyst (commodity brand AFS-12, produced by Beijing Zhongshi University Chemical Reagent Factory) are filled at 450 millimeters away from the tower still, which contains 0.3% by weight of cobalt sulfonated phthalocyanine , the carrier is activated carbon. The lower part of the catalyst bed is equipped with an air inlet, and the upper part is filled with 100 mm stainless steel packing, and the upper and l...

example 2

[0035] This example examines the denitrification effect of solid adsorbent.

[0036] The light gasoline fraction that distilled off the overhead of the catalytic distillation tower in Example 1 was adopted to denitrify by fixed bed adsorption. Strongly acidic ion exchange resin (trade name is S54, produced by Beijing Daxing Anding Resin Factory) made of sulfonated macroporous network structure copolymer of styrene and divinylbenzene is a denitrification agent, and the loading capacity is 40 grams, when the feed weight hourly space velocity is 1.0 -1 , temperature 30°C, pressure 0.6MPa. The basic nitrogen content of the treated light gasoline was measured by perchloric acid titration method, and the total nitrogen content was measured by chemiluminescence method. The results are shown in Table 3.

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Abstract

A process for separating the raw esterifying material from catalytically cracked gasoline and refining it includes such steps as introducing said gasoline to catalytic distilling tower, contacting with thiol-removing catalyst while fractionating to convert thiol to bisulfide, discharging the bisulfide and heavy component from tower bottom and the light gasoline rich in C5-C6 isomerized olefine from tower top, removing N-contained compound from said light gasoline by denitrifying absorption bed, and selective hydrogenating for removing biolefine.

Description

technical field [0001] The invention relates to a method for separating and refining etherification raw materials from fluidized catalytic cracking (FCC) whole cut gasoline, specifically, a method for separating C-rich raw materials from FCC whole cut gasoline. 5 ~C 6 The light gasoline fraction of isomeric olefins is subjected to desulfurization and denitrogenation treatment. Background technique [0002] Low-molecular-weight olefins in gasoline have high vapor pressure and photochemical reactivity, which can promote the formation of ozone in the ground atmosphere and increase the CO and NO in automobile exhaust. x emissions, seriously affecting air quality. In addition, the presence of olefins also deteriorates gasoline stability. Therefore, developed countries have imposed strict restrictions on the content of olefins in reformulated gasoline. my country's newly promulgated gasoline standards stipulate that the olefin content is ≯35m / m%, and it is expected to be furth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/06C10G67/12
Inventor 王辉国于永军姚志龙郁灼赵毓璋陈素华张宝贵谷德英杨会荣
Owner CHINA PETROLEUM & CHEM CORP
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