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A kind of catalyst and preparation method for fcc gasoline sweetening

A catalyst and sweetening technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of inability to achieve controllable adjustment of macropore-mesopore diameter, affecting product stability, and strong corrosion Sexuality and other issues, to achieve the effects of not being easy to coke and deactivate, increasing the ratio, and good stability

Inactive Publication Date: 2019-07-12
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A kind of catalyst and preparation method for fcc gasoline sweetening
  • A kind of catalyst and preparation method for fcc gasoline sweetening
  • A kind of catalyst and preparation method for fcc gasoline sweetening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Firstly, 8.0 g of water-soluble chitosan pore expander 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 expander. Weigh 1.46 g of phosphoric acid and 7.35 g of magnesium nitrate, and completely dissolve phosphoric acid and magnesium nitrate in 70 g of distilled water to prepare an aqueous solution containing phosphorus and magnesium. Weigh 350g pseudo-boehmite powder and 20.0g sesbania powder into the kneader and mix them evenly, then add the mixed solution of phosphoric acid and magnesium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite Evenly kneaded in the stone, kneaded and extruded into a clover shape. It was dried at 120°C for 8 hours and calcined at 700°C for 4 hours to obtain an alumina carrier 1 containing phosphorus and magnesium. The carrier 1 contains 0.5 wt% phosphorus pentoxide and 0.8 wt% magnesium ...

Embodiment 2

[0039] 8.0 g of a water-soluble chitosan pore expander 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 expander. Weigh 1.09g of phosphoric acid and 9.12g of magnesium nitrate, and completely dissolve phosphoric acid and magnesium nitrate in 70g of distilled water to prepare an aqueous solution containing phosphorus and magnesium. Weigh 350g pseudo-boehmite powder and 20.0g sesbania powder into the kneader and mix them evenly, then add the mixed solution of phosphoric acid and magnesium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite Evenly kneaded in the stone, kneaded and extruded into a clover shape. It was dried 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 carrier, configure an...

Embodiment 3

[0042] 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. The water-soluble chitosan pore expander is replaced with a non-water-soluble chitosan pore expander. The chitosan formic acid solution is stirred with a magnetic stirrer for 30 minutes to obtain Alumina support of macroporous structure 3. The content of the auxiliary components phosphorus, magnesium and cerium in the carrier are 1.8wt%, 2.0wt%, and 0.6wt% respectively. The specific surface area and pore size distribution are shown in Table 1.

[0043] Nickel nitrate and ammonium molybdate are prepared as an impregnation solution, ammonia water is added to adjust the pH value to dissolve the salt, and then the alumina carrier 3 is impregnated, dried at 130°C for 6 hours, and calcined at 750°C for 5 hours to obtain catalyst 3. The main components of the catalyst 3 are as follows: the alumina carrier with a macrop...

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Abstract

The invention relates to a catalyst for demercaptanization of FCC gasoline. The catalyst includes an alumina carrier with a macroporous structure and metal active components nickel and molybdenum loaded on the carrier. In terms of weight percentage, the alumina with a macroporous structure The carrier is 66-91wt%. The carrier contains additive components phosphorus and magnesium. The pore size distribution is 60-180nm, the macropore ratio is 2-75%, the pore volume is 0.8-2.0ml / g, and the specific surface area is 250-300m 2 / g. The nickel oxide content is 5-19wt%, and the molybdenum oxide content is 2-15wt%. The catalyst has high mercaptan removal activity, high diolefin hydrogenation selectivity, and low octane number loss.

Description

Technical field [0001] The invention relates to a catalyst used for FCC gasoline sweetening and a preparation method. Background technique [0002] With the increasingly stringent environmental regulations, countries around the world have put forward more and more stringent requirements on the quality of petroleum processed products, especially the 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. They not only have foul odor, but are also highly corrosive, but also affect The stability of the product. [0003] CN1229838A discloses a method for converting hydrocarbon oil. The method is to desulfurize raw oil and a hydrorefining catalyst under the process conditions of hydrodesulfurization. The hydrorefining catalyst contains Tungsten oxide (molybdenum), nickel oxide and cobalt oxide, wherein the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18B01J27/19C10G45/08
CPCC10G45/08B01J27/18B01J27/1804B01J27/19B01J37/0009C10G2300/201C10G2400/02C10G2300/70B01J35/638B01J35/635B01J35/651B01J35/647B01J35/615
Inventor 晁会霞罗祥生李剑云肖长根柳力凤
Owner QINZHOU UNIV
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