Method for decreasing sulfur content of hydrocarbon

Abstract

A method to reduce sulfur in hydrocarbon oil is that put the petroleum hydrocarbon and desulfuration agent into the fluid bed reactor and react with the fluid medium under following conditions: reaction temperature is 150-150 deg.C, heavy hourly space velocity is 0.1-60 per hour, the weight proportion of the desulfuration aget and cut fraction of gasoline is 3-40, and the reactive pressure is 130-1450 Kpa. The separate the production and desulfuration agent and transfer the production into downstream separation system. Moreover, transfer the desulfuration agent with carbon into regeneration equipment to regenerate after stripping and the regeneration temperature should be lower than 700 deg.C. Additionally, the desulfuration agent can be reused after being cooled down.

Description

technical field

[0001] This invention pertains to the refining of hydrocarbon oils in the absence of hydrogen, and more particularly to a method for reducing the sulfur content of hydrocarbon oils. Background technique

[0002] With the increase of the processing capacity of high-sulfur crude oil, the sulfur content in oil products also increases accordingly, and the environmental pollution is aggravated, which has aroused widespread concern in various countries. Developed countries limit the sulfur content of gasoline to less than 50ppm in developed countries. my country currently requires less than 800ppm in gasoline products. However, with increasingly stringent environmental protection, the requirements for gasoline sulfur content specification control are also getting higher and higher. The more effective way to reduce the sulfur content of gasoline is to use hydrofining and hydroreforming, through which catalytic reforming of gasoline can be achieved under hydrogen pre...

Examples

preparation example Construction

[0022] The preparation method of the desulfurizing agent provided by the present invention is as follows: mix the precursor of the inorganic oxide with the clay according to a predetermined amount and prepare it into a slurry with a solid content of 10-50% by weight with decationized water, and adjust its pH with an inorganic acid And maintain it to 2-4, after standing and aging at 20-80°C for 0-2 hours, add a predetermined amount of zeolite, homogenize, spray molding, and wash to remove free Na + ,dry.

[0023] Wherein the precursor of the inorganic oxide is selected from: alumina sol, pseudo-boehmite, silica sol and mixtures thereof and silica-alumina sol or gel, preferably a mixture of aged pseudo-boehmite and alumina sol, aging The weight ratio of the pseudo-boehmite to the alumina sol binder (calculated as alumina) is 0.1-10, preferably 0.5-7.0.

[0024] The aged pseudo-boehmite slurry can be prepared by a conventional method, such as beating pseudo-boehmite and water, s...

Embodiment 1

[0040] This example illustrates: using the method provided by the present invention, high-sulfur gasoline is reacted and adsorbed in contact with desulfurizers PDS2 and APDS2 in a small fluidized bed reactor.

[0041] Using the high-sulfur gasoline B listed in Table 1 as the raw material, it contacts with the desulfurizer PDS2 or APDS2 in a small fluidized bed reactor operated by continuous reaction regeneration for reaction and adsorption. The test conditions are that the reaction temperature is 350°C, the pressure at the top of the reactor is 0.2 MPa, and the weight hourly space velocity is 4 hours. -1 , the agent-oil ratio is 10, and the water-oil ratio is 0.03. The reaction product, steam and raw desulfurizing agent are separated in the settler, and the reaction product is separated to obtain gas products and liquid products, while the raw desulfurizing agent enters the stripper, and the hydrocarbon products adsorbed on the raw desulfurizing agent are stripped by water vap...

Embodiment 2

[0046] This example illustrates: using the method provided by the present invention, high-sulfur gasoline is reacted and adsorbed in contact with a desulfurizer in a small fluidized bed reactor.

[0047] Two types of high-sulfur gasoline A and B listed in Table 1 are used as raw materials, and are reacted and adsorbed in contact with desulfurizer APDS2 in a small fluidized bed reactor operated by continuous reaction regeneration. The test conditions are that the reaction temperature is 350°C, the pressure at the top of the reactor is 0.2 MPa, and the weight hourly space velocity is 4 hours. -1 , the agent-oil ratio is 10, and the water-oil ratio is 0.03. Concrete test procedure is identical with embodiment 1. The test conditions, test results and gasoline properties are listed in Table 3. The sulfur distribution of gasoline B is compared with the sulfur distribution after desulfurization in Table 4.

[0048] It can be seen from Table 3 that the desulfurizer has a good desul...

technical field

[0001] This invention pertains to the refining of hydrocarbon oils in the absence of hydrogen, and more particularly to a method for reducing the sulfur content of hydrocarbon oils. Background technique

[0002] With the increase of the processing capacity of high-sulfur crude oil, the sulfur content in oil products also increases accordingly, and the environmental pollution is aggravated, which has aroused widespread concern in various countries. Developed countries limit the sulfur content of gasoline to less than 50ppm in developed countries. my country currently requires less than 800ppm in gasoline products. However, with increasingly stringent environmental protection, the requirements for gasoline sulfur content specification control are also getting higher and higher. The more effective way to reduce the sulfur content of gasoline is to use hydrofining and hydroreforming, through which catalytic reforming of gasoline can be achieved under hydrogen pre...

Examples

preparation example Construction

[0022] The preparation method of the desulfurizing agent provided by the present invention is as follows: mix the precursor of the inorganic oxide with the clay according to a predetermined amount and prepare it into a slurry with a solid content of 10-50% by weight with decationized water, and adjust its pH with an inorganic acid And maintain it to 2-4, after standing and aging at 20-80°C for 0-2 hours, add a predetermined amount of zeolite, homogenize, spray molding, and wash to remove free Na + ,dry.

[0023] Wherein the precursor of the inorganic oxide is selected from: alumina sol, pseudo-boehmite, silica sol and mixtures thereof and silica-alumina sol or gel, preferably a mixture of aged pseudo-boehmite and alumina sol, aging The weight ratio of the pseudo-boehmite to the alumina sol binder (calculated as alumina) is 0.1-10, preferably 0.5-7.0.

[0024] The aged pseudo-boehmite slurry can be prepared by a conventional method, such as beating pseudo-boehmite and water, s...

Embodiment 1

[0040] This example illustrates: using the method provided by the present invention, high-sulfur gasoline is reacted and adsorbed in contact with desulfurizers PDS2 and APDS2 in a small fluidized bed reactor.

[0041] Using the high-sulfur gasoline B listed in Table 1 as the raw material, it contacts with the desulfurizer PDS2 or APDS2 in a small fluidized bed reactor operated by continuous reaction regeneration for reaction and adsorption. The test conditions are that the reaction temperature is 350°C, the pressure at the top of the reactor is 0.2 MPa, and the weight hourly space velocity is 4 hours. -1 , the agent-oil ratio is 10, and the water-oil ratio is 0.03. The reaction product, steam and raw desulfurizing agent are separated in the settler, and the reaction product is separated to obtain gas products and liquid products, while the raw desulfurizing agent enters the stripper, and the hydrocarbon products adsorbed on the raw desulfurizing agent are stripped by water vap...

Embodiment 2

[0046] This example illustrates: using the method provided by the present invention, high-sulfur gasoline is reacted and adsorbed in contact with a desulfurizer in a small fluidized bed reactor.

[0047] Two types of high-sulfur gasoline A and B listed in Table 1 are used as raw materials, and are reacted and adsorbed in contact with desulfurizer APDS2 in a small fluidized bed reactor operated by continuous reaction regeneration. The test conditions are that the reaction temperature is 350°C, the pressure at the top of the reactor is 0.2 MPa, and the weight hourly space velocity is 4 hours. -1 , the agent-oil ratio is 10, and the water-oil ratio is 0.03. Concrete test procedure is identical with embodiment 1. The test conditions, test results and gasoline properties are listed in Table 3. The sulfur distribution of gasoline B is compared with the sulfur distribution after desulfurization in Table 4.

[0048] It can be seen from Table 3 that the desulfurizer has a good desul...

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