First-stage selective hydrogenation catalyst for cracking gasoline, and preparation method thereof

A technology of hydrogenation catalyst and pyrolysis gasoline, which is applied in the direction of selective hydrogenation refining, chemical instruments and methods, physical/chemical process catalysts, etc. Low hydrogen selectivity and other problems, to achieve good anti-sulfur effect, improve hydrogenation selectivity, and inhibit coking ability

Active Publication Date: 2017-09-15
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 siz

Method used

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  • First-stage selective hydrogenation catalyst for cracking gasoline, and preparation method thereof
  • First-stage selective hydrogenation catalyst for cracking gasoline, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] First, 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 1.46g of phosphoric acid and 7.35g of magnesium nitrate respectively, 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. The carrier 1 contains 0.5 wt% phosphorus pentoxide ...

Example Embodiment

[0040] Example 2

[0041] 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 1.09 g of phosphoric acid and 9.12 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. Then use phosphorus and magnesium to modify the surface of the ca...

Example Embodiment

[0043] Example 3

[0044] 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.

[0045] A palladium solution was configured to impregnate the alumina carrier 3, dried at 120°C for 6 hours, and calcined at 500°C for 5 hours to obtain a catalyst 3. The palladium content of Catalyst 3 was 0.29wt%.

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Abstract

The present invention relates to a first-stage selective hydrogenation catalyst for cracking gasoline, wherein the catalyst comprises an alumina carrier having a macroporous structure and a metal active component palladium supported on the carrier, and the palladium content is 0.2-0.35 wt% based on the total weight of the catalyst. The catalyst of the present invention has advantages of good glue capacity, strong arsenic resistance, strong sulfur resistance, and strong coking inhibition.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst for petroleum hydrocarbon products and a preparation method thereof, in particular to a one-stage selective hydrogenation catalyst for pyrolysis gasoline and a preparation method thereof. Background technique [0002] Pyrolysis gasoline is an important by-product of steam cracking industrial production of ethylene and propylene, including C5-C10 fractions. The composition of pyrolysis gasoline is very complex, mainly including benzene, toluene, xylene, mono-olefins, di-olefins, straight-chain alkanes, cycloalkanes, and organic compounds of nitrogen, sulfur, oxygen, chlorine and heavy metals, etc., a total of more than 200 components, of which Benzene, toluene, and xylene (collectively referred to as BTX) are about 50-90%, and unsaturated hydrocarbons are 25-30%. According to the characteristics of a large amount of aromatics in pyrolysis gasoline, it has a wide range of uses. It can be used a...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/10C10G45/10C10G45/40
CPCB01J27/1856B01J35/1019B01J35/1042B01J35/1047B01J35/1066C10G45/10C10G45/40C10G2300/201C10G2300/202C10G2300/70C10G2400/02
Inventor 晁会霞罗祥生龚立宾陈曼枫
Owner QINZHOU UNIV
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