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Rare earth-containing diesel fuel distillate oil hydrogenation catalyst, preparation and application thereof

A technology for hydrogenation catalyst and distillate oil, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as diesel yield decline and cracking

Active Publication Date: 2014-01-01
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, to achieve the function of selective ring opening requires the catalyst to have an acidic center, and in addition to the six-membered ring / five-membered ring isomerization reaction, side reactions such as cracking are also prone to occur on the acidic site, resulting in a decline in diesel yield

Method used

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  • Rare earth-containing diesel fuel distillate oil hydrogenation catalyst, preparation and application thereof
  • Rare earth-containing diesel fuel distillate oil hydrogenation catalyst, preparation and application thereof
  • Rare earth-containing diesel fuel distillate oil hydrogenation catalyst, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 145g water glass (SiO 2 , 15.5wt%) was slowly added to 360g of 10wt% dilute nitric acid solution, stirred, and set aside. Weigh 79g of crystalline aluminum chloride and add it into 160g of deionized water, stir until dissolved, and set aside. Then slowly introduce the prepared water glass solution into AlCl 3 800g of deionized water was added to a 2000mL plastic beaker, and 8wt% ammonia solution and the above-mentioned silicon-aluminum mixed solution were added to the plastic beaker in parallel, and the pH of the solution was controlled during the process. 10.0±0.5. After the titration, the material was aged at 70°C for 48h. After aging, separation, washing, ammonium exchange, drying, and crushing are carried out to obtain amorphous silica-alumina powder for use.

Embodiment 2

[0039] Add 170g of SB powder to 1500g of 5wt% nitric acid solution, stir evenly, raise the temperature to 60°C, react for 3h, neutralize with 10wt% ammonia water, control the end point pH value at 8.5±0.2, and age for 48h. After aging, separate, wash, dry and pulverize to obtain macroporous alumina powder.

Embodiment 3

[0041] Add 6000mL deionized water to 1000g H-USY zeolite for beating, heat up to 95°C, then add 600mL chlorinated mixed rare earth solution (containing 27.2g Re 2 o 3 ), reacted for 120 minutes, filtered, washed with water, and the filter cake was dried at 110°C overnight and then roasted at 580°C for 5h to obtain the rare earth USY zeolite A.

[0042] Take 140g of the rare earth USY zeolite A prepared above, 100g of amorphous silica-alumina, 80g of macroporous alumina powder, and 30g of Tianqing powder and mix them evenly. Measure 280g of 8wt% nitric acid solution and add the above mixed powder, after fully mixing, extrude clover-shaped strips on the extruder, then dry at 110°C overnight and then roast at 550°C for 5h to obtain the shaped catalyst carrier Z1.

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Abstract

The present invention relates to a rare earth-containing diesel fuel distillate oil hydrogenation catalyst, preparation and an application thereof. The catalyst comprises 5-60 wt% of a rare earth-modified USY molecular sieve, 5-80 wt% of amorphous silica-alumina, 0.1-10 wt% of a hydrogenation active component and the balance of macroporous alumina, wherein the hydrogenation active component is a group VIII metal. The catalyst has excellent activities such as hydrogenation, isomerizing, and selective aromatic hydrocarbon ring opening. When the catalyst is adopted to treat FCC hydrorefining diesel fuel distillate oil, under relatively mild reaction conditions, cetane number can be significantly increased, a freezing point can be reduced, product quality can be increased, and the diesel fuel yield can be maintained to more than 95%. In addition, with addition of rare earth elements, activity and a service life of the catalyst are increased, and the catalyst is particularly suitable for deep hydrogenation saturation of the aromatic hydrocarbon in the second stage in the diesel fuel two-stage hydrogenation modification so as to selectively open the ring.

Description

technical field [0001] The invention relates to a rare earth-containing diesel distillate oil hydrogenation catalyst and its preparation and application. Background technique [0002] Catalytic cracking (FCC) diesel is the main source of diesel pool in my country, which is characterized by high content of sulfur, nitrogen and aromatics. Non-noble metal sulfide catalysts can remove most of sulfur and nitrogen, but the removal effect on aromatics (especially fused-ring aromatics) is very limited. Too high content of aromatic hydrocarbons (especially polycyclic aromatic hydrocarbons) in diesel will increase its density, darken its color, reduce its cetane number, reduce its combustion performance, and increase the content of particles in the exhaust gas. In order to protect the environment, improve the quality of diesel and ensure a high yield of diesel, it is necessary to develop a technology for deeply dearomatizing diesel and converting it into components with high cetane n...

Claims

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Application Information

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IPC IPC(8): B01J29/12C10G49/08
Inventor 马怀军田志坚迟克彬胡胜张天釜徐仁顺罗琛王炳春李发永曲炜王磊阎立军
Owner PETROCHINA CO LTD
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