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A method for adding oxygen to desulfurize sulfur-containing hydrocarbons

A technology for sulfide oxidation and oxygen supply, which is applied in the field of desulfurization of sulfur-containing hydrocarbons. It can solve the problems of difficult recycling of catalysts, lower octane number of gasoline products, and lower quality of gasoline products, so as to optimize the quality of gasoline products and increase octane number. , the effect of reducing unit consumption

Active Publication Date: 2022-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although adsorption desulfurization can achieve good deep desulfurization, the following problems still exist in practical applications: (1) Due to the hydrogenation effect of transition metals on olefins, the octane number of gasoline products will decrease, and the quality of gasoline products will be reduced
(2) When the sulfur bound on the zinc oxide in the aforementioned adsorbent reaches saturation, the desulfurization activity will decrease, and the sulfur must be removed through oxidation regeneration before it can be used again
[0007] Although there have been a lot of literature reports on the oxidative desulfurization of fuel oil, and various improvement researches are constantly being carried out, the oxidative desulfurization technology is still in its infancy and has disadvantages: for example, the high cost of oxidants, the loss of oil products caused by the introduction of water into the system , The oxidant itself is highly corrosive and polluting, and the catalyst is not easy to recycle, etc. Breakthroughs in solving these problems will enable better industrial application of the oxidative desulfurization process

Method used

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  • A method for adding oxygen to desulfurize sulfur-containing hydrocarbons

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This example is used to illustrate the method for oxidative desulfurization of sulfur-containing hydrocarbons of the present invention.

[0051] (1) Preparation of catalyst

[0052] 2 kg of kaolin (from Qilu Petrochemical Catalyst Factory, containing 1.6 kg on a dry basis) and 5.1 kg of aluminum sol (commercially purchased from Qilu Petrochemical Catalyst Factory, with an alumina content of 21% by weight) were mixed and stirred for 30 minutes to obtain a carrier slurry. The carrier slurry is spray-dried using a Niro Bowen Nozzle TowerTM type spray dryer, the spray-drying pressure is 8.5 to 9.5 MPa, the inlet temperature is below 500°C, and the outlet temperature is about 150°C. The microspheres (average diameter of 80 μm) obtained by spray drying were first dried at 150° C. for 1 h, and then calcined at 480° C. for 2 h to obtain the carrier.

[0053] 1.5 kg of lanthanum nitrate (commercially purchased from Sinopharm Chemical Reagent Company, analytically pure) was diss...

Embodiment 2

[0060] This example is used to illustrate the method for oxidative desulfurization of sulfur-containing hydrocarbons of the present invention.

[0061] (1) Preparation of catalyst

[0062] 0.37kg of pseudo-boehmite (commercially purchased from Qilu Catalyst Factory, containing 65% by weight of alumina) and 1.23kg of deionized water (pH=7, the same below) were mixed and beaten evenly, and a concentration of 18% by weight of hydrochloric acid was added dropwise , adjusting the pH value of the slurry to 1.8 to make the slurry in a gel state, and aging at 60° C. for 1 hour to obtain peptized pseudo-boehmite.

[0063] With 0.4kg of diatomite (Qilu Petrochemical Catalyst Factory, containing 0.24kg on a dry basis) and 0.794kg of cerium nitrate hexahydrate (Sinopharm Chemical Reagent Company, analytically pure, 0.32kg in terms of cerium oxide) in 2kg of deionized water Mix and stir evenly to obtain rare earth-containing diatomite; add 0.8kg tungsten oxide (analytically pure, containi...

Embodiment 3

[0068] This example is used to illustrate the method for oxidative desulfurization of sulfur-containing hydrocarbons of the present invention.

[0069] (1) Preparation of catalyst

[0070] 0.63kg of SB powder (German Sasol company, containing 69.8% by weight of alumina) and 1.13kg of deionized water (pH=7, the same below) were mixed and beaten evenly, and the hydrochloric acid with a concentration of 18wt% was added dropwise to adjust the pH of the slurry to Adjust to 1.8 to make the slurry in a gel state, and age at 60°C for 1 hour to obtain peptized SB powder.

[0071] With the expanded pearl salt powder of 2.75kg (Beijing Chemical Plant, containing dry basis 2.2kg), the manganese nitrate of 2.46kg (Sinopharm Chemical Reagent Company, analytically pure, with MnO 2 Calculated as 1.24kg) and 0.2kg of neodymium oxide (Sinopharm Chemical Reagent Company, analytically pure) mixed in 7.1kg of deionized water, after stirring for 30min to obtain a mixed slurry containing manganese ...

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Abstract

The invention discloses a method for adding oxygen to desulfurize sulfur-containing hydrocarbons. The method comprises: under sulfide oxidation reaction conditions, contacting sulfur-containing hydrocarbons and an oxygen-supplying medium with a catalyst for reaction, and removing sulfur oxide carried in the reaction product after the contact reaction; the catalyst is based on its total weight , containing 5-30% by weight of alumina, 5-70% by weight of a silicon oxide source, 10-70% by weight of a first metal oxide, and 2-30% by weight of a second metal oxide; the first metal The oxide is one or more selected from Sc, Ti, V, Fe, Co, Ni, Nb, Ta, Zr, Cr, Mn, Cu, Mo, W, Pd, Pt, Ru, Au, Ag and Ce The oxide of the species; the second metal oxide is a rare earth metal oxide. This method breaks through the reaction selectivity of oxygen desulfurization, not only simplifies the process steps, but also is safer and more environmentally friendly.

Description

technical field [0001] The invention relates to the field of desulfurization of sulfur-containing hydrocarbons, in particular to a method for adding oxygen to desulfurize sulfur-containing hydrocarbons. Background technique [0002] Sulfur in vehicle fuel produces sulfur oxides after combustion. This substance will inhibit the activity of the precious metal catalyst in the automobile exhaust converter and cause it to be irreversibly poisoned, and cannot realize the catalytic conversion of toxic gases in the automobile exhaust, resulting in the unburned non-methane hydrocarbons and nitrogen in the automobile exhaust. oxides and carbon monoxide. These toxic gases are easily catalyzed by sunlight to form photochemical smog and cause acid rain. And sulfur oxide itself is also one of the main causes of acid rain. [0003] As people pay more and more attention to environmental protection, environmental regulations are becoming stricter, and reducing the sulfur content in gasoli...

Claims

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Application Information

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IPC IPC(8): B01J23/28B01J23/30B01J23/34B01J23/83C10G27/04
CPCC10G27/04B01J23/28B01J23/30B01J23/34B01J23/83C10G2300/305C10G2300/202C10G2400/02
Inventor 韦悦文王鹏田辉平孙言宋海涛朱玉霞任飞徐志成
Owner CHINA PETROLEUM & CHEM CORP
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