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Method for FCC (fluid catalytic cracking) gasoline sweetening

A technology for desulfurization and gasoline, applied in chemical instruments and methods, treatment of hydrocarbon oil, petroleum industry, etc., can solve the problem of inability to realize controllable adjustment of macropore-mesoporous pore size, environmental pollution of gasoline desulfurization, and hydrogenation of diolefins. It has the advantages of not easy coking and deactivation, low price, and improving the desulfanization activity.

Inactive Publication Date: 2017-09-19
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the size of the macropore (300nm or 400nm) is completely determined by the size of the polystyrene droplet introduced twice, that is, the size of the macropore depends on the size of the polystyrene droplet
The pore size cannot be adjusted by partially changing the components of the solution itself and the interaction of organic molecules in the system
Huining Li et al. (Inorganic Chemistry, 2009, 48:4421) also used the sol-gel method to introduce polymethyl methacrylate (PMMA) droplets with a single dispersed phase into the mixed solution using F127 as a template to achieve large Pore-the formation of macropores in mesoporous alumina, the disadvantage is that the size of the macropores is completely determined by the size of the secondary introduction of polymethyl methacrylate droplets, which cannot be achieved by partially changing the components of the solution system itself The adjustment of the pore size is used to realize the formation of the macropore-mesopore composite pore structure, so it is impossible to realize the controllable adjustment of the macropore-mesopore diameter. In the process of use, especially for the macromolecular catalytic process of complex components limitations
Because mercaptan has the greatest impact on the quality of petroleum products, it not only has a foul smell, is highly corrosive, but also affects the stability of the product
Therefore, a sweetening catalyst is required to have the characteristics of high catalyst sweetening activity, high diolefin hydrogenation selectivity, and low octane number loss, so as to solve the problem of serious environmental pollution and low activity of gasoline sweetening

Method used

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  • Method for FCC (fluid catalytic cracking) gasoline sweetening
  • Method for FCC (fluid catalytic cracking) gasoline sweetening
  • Method for FCC (fluid catalytic cracking) gasoline sweetening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, 8.0 g of the water-soluble chitosan pore-enlarging agent was added to deionized water at 50° C., and then acetic acid was added dropwise until the chitosan was completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh 1.46g of phosphoric acid and 7.35g of magnesium nitrate respectively, and completely dissolve phosphoric acid and magnesium nitrate in 70g of distilled water to form an aqueous solution containing phosphorus and magnesium. Weigh 350g of pseudo-boehmite powder and 20.0g of fennel powder into the kneader, mix well, then add the mixed solution of phosphoric acid and magnesium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite Knead evenly in the stone, and shape it into a clover shape through kneading-extrusion. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containing phosphorus and magnesium. In carrier 1, phosphorus pentoxide is 0.5wt...

Embodiment 2

[0040]Add 8.0 g of the water-soluble chitosan pore-enlarging agent into deionized water at 50° C., and then add acetic acid dropwise until the chitosan is completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh 1.09g of phosphoric acid and 9.12g of magnesium nitrate respectively, completely dissolve phosphoric acid and magnesium nitrate in 70g of distilled water to form an aqueous solution containing phosphorus and magnesium. Weigh 350g of pseudo-boehmite powder and 20.0g of fennel powder into the kneader, mix well, then add the mixed solution of phosphoric acid and magnesium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite Knead evenly in the stone, and shape it into a clover shape through kneading-extrusion. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containing phosphorus and magnesium. Then use phosphorus and magnesium to modify the surface of the car...

Embodiment 3

[0043] The preparation method of the carrier was carried out according to Example 1. The difference is that the auxiliary component in the carrier also contains cerium, and the water-soluble chitosan pore-enlarging agent is replaced with a non-water-soluble chitosan pore-enlarging agent, and the chitosan formic acid solution is stirred with a magnetic stirrer for 30 minutes to obtain Alumina support with macroporous structure3. The contents of the auxiliary components phosphorus, magnesium and cerium in the carrier are respectively 1.8wt%, 2.0wt%, and 0.6wt% of the weight of the carrier. Its specific surface area and pore size distribution are shown in Table 1.

[0044] Nickel nitrate and ammonium molybdate were prepared as an impregnation solution, and ammonia water was added to adjust the pH value to dissolve all the salts, then the alumina carrier 3 was impregnated, dried at 130°C for 6 hours, and calcined at 750°C for 5 hours to obtain catalyst 3. The main composition of...

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Abstract

The invention relates to a method for FCC (fluid catalytic cracking) gasoline sweetening. The method adopts a fixed bed reactor, a used catalyst comprises, in weight percentage, 66-91wt% of alumina support with a macro-porous structure, 5-19wt% of metal active component nickel oxide and 2-15wt% of metal active component molybdenum oxide, the metal active component nickel and the metal active component molybdenum are loaded on the support, the alumina support takes chitosan as a pore-expanding agent, the support comprises additive component phosphorus and additive component molybdenum, and the reaction process conditions include that reaction temperature ranges from 110 DEG C to 220 DEG C, reaction pressure ranges from 1.1MPa to 3.5MPa, volume space velocity ranges from 1.2h<-1> to 4.0h<-1>, and hydrogen oil volume ratio is (7-25):1. The sweetening method has strong adaptability to oil products with different sulfur contents, mercaptan sulfur contents and olefin contents.

Description

technical field [0001] The invention relates to a method for sweetening FCC gasoline. Background technique [0002] With the increasingly stringent environmental protection regulations, countries around the world have put forward more and more stringent requirements on the quality of petroleum processed products, especially the stricter restrictions on the sulfur content of petroleum processed products. The sulfides contained in light petroleum products are mainly mercaptans (RSH), sulfides (RSR), etc. Among them, mercaptans have the greatest impact on product quality, not only have a foul smell, strong corrosiveness, but also affect Product stability. [0003] CN1229838A discloses a conversion method of hydrocarbon oil, the method is to remove mercaptans from raw oil and a hydrorefining catalyst under the process conditions of hydrodemercaptanization, and the hydrorefining catalyst contains Tungsten (molybdenum) oxide, nickel oxide and cobalt oxide, wherein the content of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08B01J27/19B01J35/10
CPCC10G45/08B01J23/002B01J27/19C10G2300/202B01J35/638B01J35/615B01J35/651B01J35/635
Inventor 罗祥生晁会霞张乐
Owner QINZHOU UNIV
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