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

A molecular sieve and modification technology, which is applied in molecular sieve catalysts, refined hydrocarbon oils, chemical instruments and methods, etc., can solve the problems of octane number loss, affecting the desulfurization effect of sulfur-containing hydrocarbons, and high deactivation rate of adsorbents

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 hydrocarbons 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 to make sulfur Lower levels, but due to the large amount of olefins in gasoline, increasing the 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 h

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

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Example Embodiment

[0045] The preparation method of the modified molecular sieve provided by the present invention includes the steps of preparing a suspension and mixing the suspension with the molecular sieve raw materials. The method for preparing the suspension includes: forming a mixture of metal powder, a hydroxyl-containing solvent, and a surfactant, and processing under ultrasonic waves to obtain an ultrasonic mixture; wherein, during the ultrasonic processing, the fine particles are stripped from the metal powder. The metal particles are suspended in the solvent; the larger particles are separated from the mixed liquid after ultrasound to obtain a suspension in which fine particles containing modified metals are suspended. The metal powder (metal powder) can be pure metal powder (when the metal film contains only modified metal and the modified metal is one type), alloy powder containing modified metal and boron, and containing multiple Modified metal alloy powder. When the prepared mod...

Example Embodiment

[0057] The present invention provides a specific embodiment of the preparation method of modified molecular sieve, including the following steps: mixing metal powder and hydroxyl-containing solvent uniformly, and then at a specific ultrasonic power of 50-250W / (100g hydroxyl-containing solvent), preferably 100-150W / (100g hydroxyl-containing solvent) ultrasonic treatment for 4-10 hours, such as 5-8h, then the ultrasonic mixture is centrifuged at 1200-3000 rpm, preferably 1500-2500 r / min, and suspended after separation Liquid; then the molecular sieve solid powder or molecular sieve slurry containing the molecular sieve solid powder is poured into the resulting suspension to be uniformly dispersed, and then freeze-dried to obtain a modified molecular sieve. The average particle size of the metal fine powder is less than 20 microns, preferably 1-15 microns or 3-18 microns; D of the molecular sieve solid powder 90 1-20 microns, preferably 2-15 microns or 3-12 microns or 4-8 microns;...

Example Embodiment

[0069] Example 1

[0070] This example is used to illustrate the modified molecular sieve of the present invention and its preparation method.

[0071] First, add 10g of nickel powder (average particle size of nickel powder is 10 microns, source: Sinopharm Group) and 100ml of ethylene glycol (Sinopharm Group, purity AR) into a 200ml jar, mix well, and then add 60mg of the surfactant Gandan Sodium (purity AR, source: Nanjing Pars Biotechnology Co., Ltd.); then, place the reaction vessel (jar) in an ultrasonic cleaning machine, and ultrasonically treat it with 160W power for 6h (frequency 40KHz); The liquid is centrifuged at 1500r / min for 20min in a centrifuge, and the supernatant (ie suspension) is taken out with a straw. The concentration of metallic nickel in the suspension is 15g / Kg, D 90 Is 5nm;

[0072] Put 14.5 grams (on a dry basis) 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 Branc...

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Abstract

The invention discloses a modified molecular sieve for hydro-desulfurization as well as preparation and application thereof. The modified molecular sieve comprises a molecular sieve and a modifying metal film positioned on the outer surface of molecular sieve particles, wherein the modifying metal film contains one or more first modifying metals selected from Fe, Co, Ni and Mn and optional B. Thepreparation method of the modified molecular sieve comprises the following steps: forming a mixture from 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 weight is used for hydro-desulfurization of sulfur-containing hydrocarbons, has high activity and stability, can obviously reduce the olefin content, increase the iso-hydrocarbon content and increase the octane number of gasoline when used for gasoline desulfurization, and has a high gasoline yield.

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): B01J29/85C10G45/12
CPCB01J29/85C10G45/12C10G2300/1037C10G2300/104C10G2300/1044C10G2300/70C10G2300/202C10G2400/02
Inventor 王鹏田辉平林伟孙言宋海涛姜秋桥严加松龙军
Owner CHINA PETROLEUM & CHEM CORP
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