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Method of dense raw material hydrotreatment-catalytic cracking for improving propylene productivity

A technology for hydrotreating and catalytic cracking, which is applied in hydrotreating process, processing of hydrocarbon oil, petroleum industry, etc., can solve the problems of low propylene yield, etc., and achieve the effect of improving propylene yield

Active Publication Date: 2007-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method converts catalytic cracking oil slurry into light oil products, improves the yield of gasoline and diesel oil, and reduces the yield of heavy oil, but the yield of propylene is low in this method

Method used

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  • Method of dense raw material hydrotreatment-catalytic cracking for improving propylene productivity
  • Method of dense raw material hydrotreatment-catalytic cracking for improving propylene productivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment adopts the technical solution 1 provided by the present invention, and the raw material oil A (heavy distillate oil) used is a vacuum gas oil, and its main properties are shown in Table 1.

[0042] Under the action of hydrogen, the raw material oil A is contacted with the hydrogenation protection agent and the hydrogenation catalyst to react successively. Based on the overall catalyst volume, the filling ratios are respectively 9% and 91%, and the reaction effluent is cooled and separated. After fractionation and fractionation, gas, light liquid phase fraction and heavy liquid phase fraction are obtained, hydrogenation reaction conditions and heavy liquid phase fraction properties are as shown in table 2, as can be seen from table 2, the heavy liquid phase fraction The 10% distillation temperature is 367°C, and the product yield at 350°C+ is as high as 87% by weight, the sulfur content is only 204ppm, the nitrogen content is only 10ppm, and the hydrogen c...

Embodiment 2

[0044] This embodiment adopts the technical scheme 1 provided by the present invention, the heavy distillate oil used is the raw material oil A, and the cycle oil 1 from the catalytic cracking unit is a mixture of light cycle oil and heavy cycle oil, and its main properties are shown in Table 1.

[0045] The mixed oil of feedstock oil A and cycle oil 1 (mixed mass ratio is 100:5) is reacted with hydrogenation protecting agent, hydrotreating catalyst and hydrotreating catalyst successively under the action of hydrogen, and the overall catalyst volume is Standard, its filling proportion is 12%, 70% and 18% respectively, and its reaction effluent is obtained gas, light liquid phase fraction and heavy liquid phase fraction after cooling, separation and fractionation. The hydrogenation reaction conditions and the properties of the heavy liquid phase fraction are shown in Table 2. As can be seen from Table 2, the 10% distillation temperature of the heavy liquid phase fraction is 351 ...

Embodiment 3

[0047] The heavy liquid fraction obtained in Example 1 was used as the raw material of the catalytic cracking unit, and reacted in a laboratory small-scale fixed fluidized bed reactor, and then the product was separated. The operating conditions and product distribution of catalytic cracking are shown in Table 3.

[0048] It can be seen from Table 3 that the yields of propylene, ethylene and butene are as high as 28.96 wt%, 11.06 wt% and 13.95 wt%, respectively.

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Abstract

The invention discloses a heavy raw material hydrotreating-catalytic cracking method to increase propone productivity, which comprises the following steps: choosing light circling oil and or weight circling oil from catalytic cracking unit; adding into hydrogenation reaction zone with heavy cut oil; or adding into two hydrogenation reaction zone with different hydrogenation catalyst to react; getting effluent; cooling; separating; fractionating; getting heavy liquid phase fraction; moving catalytic cracking unit; separating the catalytic cracking reacting product; getting the final product. This invention can dispose cycloalkyl heavy raw material, which propone receiving ratio can increase by 5-7 percent dot.

Description

technical field [0001] The invention belongs to a hydrotreating process, a multi-step process of catalytic cracking steps in the absence of hydrogen, more specifically, a method for hydrotreating heavy raw materials-catalytic cracking to increase the yield of propylene . Background technique [0002] The traditional petrochemical industry is based on steam cracking to produce ethylene. In the next few decades, my country's national economy will continue to grow rapidly, and GDP will increase by more than 7% per year on average. The rapid growth of the national economy will promote the rapid development of my country's petrochemical industry. However, if the petrochemical industry is developed with traditional technology, it is predicted that by 2020 my country's demand for chemical light oil will reach 76-83 million tons. There is a huge gap. In addition, if the petrochemical industry takes the traditional route of steam cracking to ethylene, it w...

Claims

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Application Information

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IPC IPC(8): C10G69/04
Inventor 李大东戴立顺龙湘云蒋东红胡志海刘涛张毓莹刘广元
Owner CHINA PETROLEUM & CHEM CORP
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