Modified molecular sieve for hydro-desulfurization as well as preparation and application thereof

A molecular sieve and modification technology, applied in molecular sieve catalysts, refined hydrocarbon oil, chemical instruments and methods, etc., can solve the problems of desulfurization activity decline, gasoline product octane number decrease, octane number loss, etc., to achieve high desulfurization, high Effect of desulfurization activity

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrodesulfurization reacts sulfur-containing hydrocarbon oil such as gasoline with hydrogen in the presence of a hydrogenation catalyst. With the increasingly stringent fuel standards, this requires more severe hydrogenation reaction conditions such as higher reaction pressure or temperature. Lower sulfur content, but due to high olefin content in gasoline, increasing hydrogenation severity will result in higher octane loss
Adsorption desulfurization is usually carried out by contacting the adsorbent with sulfur-containing hydrocarbons under the condition of hydrogen. First, the sulfur-containing hydro...

Method used

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  • Modified molecular sieve for hydro-desulfurization as well as preparation and application thereof
  • Modified molecular sieve for hydro-desulfurization as well as preparation and application thereof
  • Modified molecular sieve for hydro-desulfurization as well as preparation and application thereof

Examples

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preparation example Construction

[0043] The preparation method of the modified molecular sieve provided by the invention comprises the steps of preparing a suspension and mixing the suspension with molecular sieve raw materials. The preparation method of the suspension includes: forming a mixture of metal powder, a hydroxyl-containing solvent and a surfactant, and treating it under ultrasonic waves to obtain a mixed liquid after ultrasonic treatment; wherein, during the ultrasonic treatment process, the fine particles are peeled off from the metal powder The metal particles are suspended in the solvent; the ultrasonic mixture separates the larger particles to obtain a suspension, which suspends fine particles containing modified metals. The metal powder can be an alloy powder containing multiple modified metals. Among them, there is no special requirement on the relative content of the metal powder (or metal powder or metal fine powder) and the hydroxyl-containing solvent, as long as the hydroxyl-containing s...

specific Embodiment approach

[0054] The present invention provides a specific implementation of the preparation method of the modified molecular sieve, which includes the following steps: uniformly mixing the metal powder and the hydroxyl-containing solvent, and then using a specific ultrasonic power of 50-250W / (100g hydroxyl-containing solvent), preferably 100-150W / (100g hydroxyl-containing solvent) under the power of ultrasonic treatment for 4 to 10 hours, such as 5 to 8 hours, and then the ultrasonic mixture is centrifuged at 1200 to 3000 rpm, preferably 1500 to 2500 rpm, and the suspension is obtained after separation liquid; then put the molecular sieve solid powder or the molecular sieve slurry containing the molecular sieve solid powder into the obtained suspension, disperse evenly, and freeze-dry to prepare the modified molecular sieve. The average particle diameter of the metal fine powder is less than 20 microns, preferably 1-15 microns or 3-18 microns; the D of the molecular sieve solid powder...

Embodiment 1

[0067] This example is used to illustrate the modified molecular sieve of the present invention and its preparation method.

[0068] First, add 10g of Sn-Bi alloy powder (the average particle size of Sn-Bi alloy powder is 10 microns, and the weight ratio of Sn to Bi is 0.5:1) and 100ml of ethylene glycol (Sinopharm Group, purity AR) into a 200ml jar. , mix well, then add 60mg of surfactant sodium glycocholate (purity AR, source: Nanjing Pars Biotechnology Co., Ltd); Ultrasonic treatment for 6h (frequency 40KHz); centrifuge the ultrasonicated liquid at 1500r / min for 20min in a centrifuge, take out the supernatant (i.e. suspension) with a straw, the concentration of the modified metal in the suspension is 15g / Kg ,D 90 is 5nm;

[0069] 14.5 grams (on a dry basis) of SAPO-11 molecular sieve powder (Si: Al: P molar ratio = 1: 9: 10, D 90 =14 microns, relative crystallinity 91%, industrial grade, product of Qilu Branch of Sinopec Catalyst Co., Ltd., the same below), mixed with 10...

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Abstract

The invention relates to a modified molecular sieve for hydro-desulfurization and preparation and application thereof. The modified molecular sieve comprises a molecular sieve and a modifying metal film, and the modifying metal film is located on the outer surface of molecular sieve particles; wherein the modifying metal film contains a modifying metal, the modifying metal comprises a first metaland an optional second metal, the first metal is one or more of Ge, Sn and Pb, and the second metal is Bi and/or Sb and/or Ga. The preparation method comprises the following steps: forming a mixturefrom metal powder, a hydroxyl-containing solvent and a surfactant, then treating the mixture under ultrasonic waves to obtain a mixed solution after the ultrasonic treatment; separating the mixed solution after the ultrasonic treatment to obtain suspension, mixing the suspension with a molecular sieve, and carrying out freeze-drying to obtain the modified molecular sieve. The modified molecular sieve can be used for hydro-desulfurization of sulfur-containing hydrocarbons, has the characteristics of high desulfurization activity, high stability and good selectivity, is used for gasoline desulfurization, and can improve the octane number of gasoline.

Description

technical field [0001] The invention relates to a modified molecular sieve used for hydrogen desulfurization, a preparation method and an application method thereof. Background technique [0002] Sulfur in hydrocarbon fuels burns to produce sulfur oxides. The sulfur oxides produced by vehicle fuels will inhibit the activity of noble metal catalysts in automobile exhaust converters and cause irreversible poisoning, and catalytic conversion of toxic gases in automobile exhaust cannot be achieved. The role of gas, so that the exhaust of vehicles contains unburned non-methane hydrocarbons, nitrogen oxides and carbon monoxide. These toxic gases are easily catalyzed by sunlight to form photochemical smog, causing acid rain, and sulfur oxide itself is also the main cause of acid rain. one. [0003] Reducing the sulfur content in gasoline and diesel is considered one of the most important measures to improve air quality. As people pay more and more attention to environmental prote...

Claims

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Application Information

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IPC IPC(8): B01J29/85B01J29/70B01J29/40B01J29/26C10G45/12
CPCB01J29/85B01J29/405B01J29/7057B01J29/26C10G45/12C10G2300/1037C10G2300/104C10G2300/1044C10G2300/70C10G2300/202C10G2400/02
Inventor 龙军林伟王鹏田辉平孙言宋海涛姜秋桥严加松
Owner CHINA PETROLEUM & CHEM CORP
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