Deep desulfurization method for catalytically cracked gasoline

A technology of catalytic cracking gasoline and deep desulfurization, which is applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., and can solve the problems of octane number loss, high octane number loss, and large hydrotreating ratio of full distillate gasoline. Achieve the effect of reducing the loss of octane number and wide applicability

A technology of catalytic cracking gasoline and deep desulfurization, which is applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., and can solve the problems of octane number loss, high octane number loss, and large hydrotreating ratio of full distillate gasoline. Achieve the effect of reducing the loss of octane number and wide applicability

CN103555359AActive Publication Date: 2014-02-05HEBEI REFINING TECH CO LTD
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  • Deep desulfurization method for catalytically cracked gasoline
  • Deep desulfurization method for catalytically cracked gasoline
  • Deep desulfurization method for catalytically cracked gasoline

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] According to the above method and process, the gasoline fraction with a boiling range of 40-100°C and a sulfur content of 200-400ppm is used as a raw material, and the process operation conditions shown in the following Table 1 are used to obtain a desulfurization product with a yield of >95%m, desulfurization Product sulfur content <5ppm.

[0062] Table 1

[0063] project

Embodiment 2

[0065] According to the above method and process, the gasoline fraction with a boiling range of 40-100°C and a sulfur content of 600-800ppm is used as a raw material, and the process operation conditions shown in the following Table 2 are used to obtain a desulfurization product with a yield of >95%m, desulfurization Product sulfur content <10ppm.

[0066] Table 2

[0067] project

Embodiment 3

[0069] A general-purpose catalytic cracking gasoline deep desulfurization method, its process is as follows figure 2 As shown, the specific steps are as follows:

[0070] 1) Cut the stable steam into light gasoline fraction, medium gasoline fraction and heavy gasoline fraction, where the cut point of light gasoline fraction and medium gasoline fraction is 40°C, and the cut point of medium gasoline fraction and heavy gasoline fraction is 100°C;

[0071] 2) The light gasoline fraction obtained in step 1) is subjected to sweetening treatment, such as the method described in ZL200910250279.8 using pure lye to extract the mercaptan sulfur in the C5 fraction into the lye to remove sulfur Desulfurization light distillate and sulfur-rich component H with a content of less than 10ppm; the yield of the low-sulfur light gasoline can generally reach 20-30% (m) of the whole distillate gasoline;

[0072] 3) Treat the medium gasoline fraction obtained in step 1) according to the solvent ex...

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Abstract

The invention provides a gasoline fraction solvent extraction desulfurization method comprising the steps of enabling a gasoline fraction to enter from the lower middle part of an extraction tower, enabling a solvent to enter from the top of the extraction tower, filling saturated C5 into a reflux device at the bottom of the extraction tower, controlling the temperature of the top of the extraction tower at 55-100 DEG C, the temperature of the bottom of the extraction tower at 40-80 DEG C, the pressure of the top of the extraction tower at 0.2-0.7MPa, the solvent to gasoline fraction ratio at 1.0-5.0 and the saturated C5 to gasoline fraction feeding ratio at 0.1-0.5, ejecting the extracted and desulfurized gasoline fraction out of the extraction tower, and washing to obtain a desulfurized gasoline fraction; discharging the solvent from the bottom of the extraction tower, separating a C5-contained light component, a sulfur-rich component, water and the solvent, returning the light component to the reflux device of the extraction tower, returning the water to the washing step, and returning the solvent to the top of the extraction tower, wherein sulfides, aromatic hydrocarbons and the C5 are extracted by the solvent. The invention also provides a deep desulfurization method for catalytically cracked gasoline. The solvent extraction desulfurization method is flexibly combined with the traditional desulfurization technology used by an enterprise, so that the deep desulfurization is realized, and meanwhile, the octane value loss of the gasoline fraction is remarkably reduced.

Description

technical field [0001] The invention relates to a gasoline desulfurization method, in particular to a method for catalytic cracking gasoline deep desulfurization. Background technique [0002] Facing the situation of increasing smog, the government has accelerated the pace of upgrading the quality of gasoline and diesel. In 2014, the National IV emission standard for oil products will be implemented nationwide, requiring the sulfur content of gasoline to be reduced to below 50ppm; at the same time, the National V quality The standard requires reducing the sulfur content to below 10ppm, and it was first implemented in Beijing, Shanghai, and Guangzhou in 2013. FCC gasoline accounts for about 70-80% of gasoline product components in my country. The main task of gasoline sulfur reduction is actually FCC gasoline sulfur reduction. [0003] Existing catalytic cracking gasoline sulfur reduction technologies are mainly represented by Sinopec S-zorb, Academy of Petroleum Sciences RS...

Claims

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Application Information

Patent Timeline
05 Feb 2014
Publication
CN103555359A
IPC
C10G21/14; C10G21/28
CPC
C10G67/04; C10G21/14; C10G21/16; C10G21/20; C10G21/22; C10G21/28; C10G53/16; C10G67/16
Inventors
郝天臻; 李德忠