Method and device for separating heavy aromatics from catalytic cracking oil slurry

A technology for catalytically cracking oil slurry and heavy aromatics, which is applied in the field of separating aromatics to achieve the effect of improving product quality

Inactive Publication Date: 2014-08-27
嘉诚(福建)石油化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, Chinese invention patent application 201210555530.3 (CN103059904A) discloses a method for producing a rubber softener from oil slurry. The distillate is extracted from two lines in a vacuum tower, and as a rubber softener, it contains about 80% condensed aromatic hydrocarbons. But this document has no example to illustrate the specific aromatic hydrocarbon content of the rubber softener

Method used

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  • Method and device for separating heavy aromatics from catalytic cracking oil slurry
  • Method and device for separating heavy aromatics from catalytic cracking oil slurry
  • Method and device for separating heavy aromatics from catalytic cracking oil slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] use as figure 1 The experimental device shown in Table 4 is used to separate heavy aromatics from catalytic cracking oil slurry according to the amount of raw material for catalytic cracking oil slurry. Among them, the catalytic cracking oil slurry is heated to about 375 °C, enters a vacuum tower with 14 theoretical plates, and is decompressed under a vacuum of 2 kPa to separate the extracted oil at 350-500 °C; the extracted oil Enter the extraction device (theoretical plate number is 6) to carry out heavy aromatics extraction with furfural. Among them, the feed ratio of furfural to extraction oil is 1.5:1 (weight ratio), and the extraction temperature is 85° C. to obtain raffinate and heavy aromatics.

[0048] The properties of the decompression extraction oil are shown in Table 2 below:

[0049] Table 2 Raw material decompression extraction oil properties

[0050]

[0051] The properties of the produced wax oil and aromatics are shown in Table 3 below.

[0052]...

Embodiment 2

[0058] use as figure 2 The experimental device shown in Table 7 is used to separate heavy aromatics from catalytic cracking oil slurry according to the raw material amount of catalytic cracking oil slurry shown in Table 7. Among them, the catalytic cracking oil slurry is heated to 380°C, enters a packed tower (vacuum tower) with 14 theoretical trays, and is decompressed and pulled out under a vacuum of 2kPa to separate the minus line pulled out at 350-450°C. Oil and 450-500°C minus second-line pull-out oil. The two extracted oils were sent to different extraction devices (both with 6 theoretical plates) to extract heavy aromatics with furfural. Among them, when extracting the first-line extraction oil, the feed ratio of furfural and raw oil is 1.5:1, and the extraction temperature is controlled at 75°C to obtain light and heavy aromatics and the first raffinate oil (wax oil); the second-line extraction oil raw material During extraction, the feed ratio of furfural to raw oi...

Embodiment 3

[0069] use as image 3 In the experimental device shown, heavy aromatics were separated from catalytic cracking oil slurry with the amount of catalytic cracking oil slurry feedstock (as shown in Table 1) shown in Table 10. Among them, the catalytic cracking oil slurry is heated to about 380°C, enters a packed tower (vacuum tower) with 16 theoretical trays, and is decompressed and unplugged under a vacuum of 2kPa to separate the 350-450°C minus-line extractor. Oil extraction and 450-500 °C minus second line extraction oil. The two extracted oils are respectively stored in the first buffer tank and the second buffer tank as raw materials for the extraction of heavy aromatics. The oil extracted from the first line is introduced from the first buffer tank as the raw material of the oil extracted from the line to the heavy aromatics extraction device (6 theoretical plates). The ratio of furfural to raw oil is 1.5:1, and the extraction temperature is controlled at 75°C. Obtain lig...

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Abstract

The invention provides a method for separating heavy aromatics from catalytic cracking oil slurry. The method comprises the steps of a. carrying out reduced-pressure distilling on catalytic cracking oil slurry under the conditions of a temperature of 360-400 DEG C and a pressure of 1-3kPa and separating to obtain the distilled oil of which the temperature is 350-500 DEG C; and b. carrying out heavy aromatic extraction on the distilled oil at 60-110 DEG C by furfural with a weight ratio of furfural to distilled oil being (1-2.5) to 1 to obtain heavy aromatics and raffinate oil. The invention also provides a device for carrying out the method. The device comprises a vacuum tower and an extraction device, wherein the theoretical number of plates of the vacuum tower is 10-20 and the theoretical number of plates of the extraction device is 4-9.

Description

technical field [0001] The invention relates to a method and equipment for separating aromatics from petroleum processed products, more specifically, to a method and equipment for separating heavy aromatics from catalytic cracking oil slurry. Background technique [0002] Catalytic cracking is one of the most important processing methods for lightening heavy oil today. In order to meet the demand for heavy crude oil and light fuel oil, some catalytic cracking units directly process atmospheric residue, and some catalytic cracking units blend vacuum residue. However, the weight of the raw material brings many adverse effects to the catalytic cracking unit, especially coking and fouling can easily make the unit unable to operate normally. In order to prevent the coking and fouling of the unit and maintain the heat balance of the unit at the same time, many refineries use the method of throwing oil slurry outside to solve this contradiction. However, as the raw material conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/04
Inventor 赖光愚
Owner 嘉诚(福建)石油化工有限公司
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