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Combination method of catalytic cracking production separation and hydrogen refining

A hydrorefining and catalytic cracking technology, which is applied in the fields of hydroprocessing process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of poor absorption effect, high energy consumption of the absorption and stabilization system, and large amount of absorbent, so as to reduce energy consumption. Consumption, improve the absorption effect, the effect of small investment

Active Publication Date: 2008-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, all of them use the stable gasoline after catalytic cracking absorption and stabilization as the cutting raw material, the absorption and stabilization process has poor absorption effect, the amount of absorbent is large, and the energy consumption of the absorption and stabilization system is high.

Method used

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  • Combination method of catalytic cracking production separation and hydrogen refining
  • Combination method of catalytic cracking production separation and hydrogen refining

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Experimental program
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Effect test

Embodiment 1

[0034] According to the method provided by the present invention shown in accompanying drawing 1, utilize Aspen plus software to carry out simulation calculation to catalytic cracking fractionation absorption stable flow process, main operation condition: the oil and gas amount that enters main fractionator is 309215kg / h, main fractionator tower top changes The oil gas temperature at the outlet of the heater 4 is 70° C., the oil gas temperature at the outlet of the rich gas heat exchanger 21 is 40° C., and the 95% distillation temperature point of light gasoline is 165° C. The calculation results are shown in Table 1.

Embodiment 2

[0036] According to the method provided by the present invention shown in accompanying drawing 2, utilize Aspen plus software to carry out simulation calculation to catalytic cracking fractionation absorption stable flow process, main operation condition: the oil and gas amount that enters main fractionator is 309215kg / h, gasoline fractionator tower top condenses The temperature is 40°C, the temperature of the tower bottom is 180°C, the reflux ratio is 1.2, and the distillation temperature of 95% of light gasoline is 150°C. The calculation results are shown in Table 1.

Embodiment 3

[0041] The crude gasoline A produced by the catalytic cracking unit is cut into light and heavy gasoline fractions, the cut point is 96°C, and the heavy gasoline fraction is hydrofined. The hydrofinishing catalyst is the catalyst of Changling Refinery and Chemical General Plant of China Petroleum and Chemical Corporation. The RSDS-1 catalyst produced by the factory. The light gasoline fraction is washed with alkali to remove mercaptans, and then the light and heavy fractions are mixed into refined gasoline products. The properties of raw material A heavy gasoline fraction are shown in Table 2, the hydrogenation reaction conditions and reaction results are shown in Table 3, and the properties of raw material A and the mixed gasoline product are shown in Table 4.

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Abstract

A combined method for separating and hydro-refining catalytic cracking product comprises the following steps: (1) introducing oil gas escaping from a settler of a catalytic cracking reaction system into a main fractionating tower, sequentially separating slurry oil, cycle oil, heavy diesel oil, diesel oil and overhead oil gas from bottom to top of the main fractionating tower, and feeding the overhead oil gas to an oil gas separation system to separate a fraction less than C4, light gasoline fraction and heavy gasoline fraction; (2) introducing the separated fraction less than C4 and the light gasoline fraction into an absorbing, stabilizing and refining system of the catalytic cracking device to obtain the product of the fraction less than C4 and the light gasoline product; and (3) introducing the separated heavy gasoline fraction into a hydrogenation reaction, contacting with a hydro-refining catalyst, and feeding hydrogen to carry out hydro-refining reaction to obtain heavy gasoline product. The method provided by the invention can produce clean gasoline and improve the absorption effect, and has the advantages of lowered energy consumption, simple and flexible flow, less investment and easy implementation.

Description

technical field [0001] The present invention relates to a hydrotreating process and at least one refining process in the absence of hydrogen for the treatment of hydrocarbon oils, and more particularly to a method for the separation and refining of catalytic cracking products. Background technique [0002] With the increasingly stringent environmental protection regulations, countries all over the world have put forward more and more stringent restrictions on the sulfur content and olefin content of motor gasoline. At present, my country's motor gasoline is dominated by catalytic cracking (FCC) gasoline, accounting for about 80% of the finished gasoline. The content of sulfur and olefins in FCC gasoline is high, and, with the heavy weight of FCC processing raw materials, the content of sulfur and olefins in FCC gasoline will further increase. Therefore, reducing the sulfur content and olefin content in FCC gasoline is the main way to control the sulfur and olefin content in...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 李强张久顺常学良鲁维民许友好毛安国张执刚胡云剑屈锦华
Owner CHINA PETROLEUM & CHEM CORP
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