Catalytic conversion method capable of increasing propylene yield

A catalytic conversion method, propylene technology, applied in the direction of organic chemistry, bulk chemical production, only multi-stage series refining and cracking process treatment, etc., can solve the problems of increasing the limitation of propylene selectivity and yield of catalytic cracking unit

Active Publication Date: 2007-03-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Although the above technologies have made some progress in increasing the yield of catalytic cracking propylene, they mainly rely on increasing the yield of liquefied gas from catalytic cracking to increase the yield of propylene. However, due to the limitations of structuralization and hydrogen transfer reactions, the limitations of increasing the selectivity and yield of propylene in FCC units are still very large

Method used

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  • Catalytic conversion method capable of increasing propylene yield

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Phosphoric aluminum sol preparation: 1.05 kilograms of pseudo-boehmite (dry basis) and 3.35 kilograms of decationized water were beaten for 30 minutes, and 4.9 kilograms of concentrated phosphoric acid (chemically pure, containing 85% by weight of phosphoric acid) were added to the slurry under stirring, and the temperature was raised to 70°C, and then reacted at this temperature for 45 minutes to produce a colorless and transparent phosphoraluminum sol. where P 2 o 5 30.6 wt%, Al 2 o 3 10.5% by weight, pH 1.7.

[0076] Take 2.00 kg (dry basis) F 1 , 1.15 kg (dry basis) of kaolin and 0.65 kg (dry basis) of pseudoboehmite, add 6.2 kg of deionized water and 2.79 kg of aluminum sol for beating for 120 minutes, add 1 liter of FeCl under stirring 3 .6H 2 Aqueous solution of O (which contains 100 g of Fe 2 o 3 ), the pH value of the slurry is 3.0. Continue beating the mixture for 45 minutes, and then add 1.22 kg of phosphorus-aluminum sol to the mixed slurry. After...

Embodiment 2

[0078] Take 1.84 kg (dry basis) F 2 Zeolite, 1.33 kg (dry basis) of kaolin and 0.98 kg (dry basis) of pseudoboehmite, add 7.2 kg of deionized water and 2.79 kg of aluminum sol for beating for 120 minutes, add 1 liter of FeCl under stirring 3 .6H 2 Aqueous solution of O (which contains 250 g of Fe 2 o 3 ), the pH value of the slurry is 3.0. The mixture was further beaten for 45 minutes, and then the resulting slurry was spray-dried at an inlet temperature of 500° C. and an exhaust gas temperature of 180° C. to obtain microspheres with an average particle diameter of 65 μm. The microspheres were calcined at 500°C for 1 hour to obtain 36.8 wt% F 2 Zeolite, 26.6 wt% kaolin, 31.6 wt% Al 2 o 3 and 5.0 wt% Fe additive (as Fe 2 o 3 count) microspheres.

[0079] Take 1 kg (dry basis) of the microsphere product, add 10 liters of decationized water and 100 grams of diammonium hydrogen phosphate, heat up to 60°C under stirring, react at this temperature for 20 minutes, filter the...

Embodiment 3

[0081] Take 2.63 kg (dry basis) F 3 and 1.24 kg (dry basis) of pseudo-boehmite, add 7.2 kg of decationized water and 2.79 kg of aluminum sol for beating for 120 minutes, add 1 liter of FeCl under stirring 3 .6H 2 Aqueous solution of O (which contains 526.5 g of Fe 2 o 3 ), the pH value of the slurry is 3.0. The mixture was further beaten for 45 minutes, and then the resulting slurry was spray-dried at an inlet temperature of 500° C. and an exhaust gas temperature of 180° C. to obtain microspheres with an average particle diameter of 65 μm. The microspheres were calcined at 500°C for 1 hour to obtain 52.63 wt% F 3 , 36.84 wt% Al 2 o 3 and 10.53 wt% Fe additive (as Fe 2 o 3 count) microspheres.

[0082] Take 1 kg (dry basis) of the microsphere product, add 10 liters of decationized water and 105 grams of diammonium hydrogen phosphate, heat up to 60° C. under stirring, react at this temperature for 20 minutes, vacuum filter the slurry, dry, and then Calcined at 500°C fo...

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Abstract

The invention discloses a catalytic conversing method of increasing production propylene, which comprises the following steps: injecting preheat crude oil in the main elevating pipe of double-elevating reacting regenerating system; contacting with heat catalyst to proceed catalytic cracking reaction; separating production; recycling re-living agent; injecting liquid propylene in the auxiliary elevating pipe; proceeding olefin superposition; cracking and dehydrogenizing the superposition product; separating production; recycling the re-living agent. The catalyst is compound of two catalysts, which contains first cracking catalyst with Y-typed molecular sieve and second cracking catalyst agent with ZSM-5 molecular sieve, transition metal additive and phosphorus additive with the dried weight rate of first and second catalysts at 10-70:30-90.

Description

technical field [0001] The present invention relates to a method for catalytic conversion of hydrocarbon oil in the absence of hydrogen, more specifically, a method for catalytic conversion of petroleum hydrocarbons to produce light hydrocarbon products while significantly increasing the yield of propylene . Background technique [0002] Catalytic cracking is one of the most important processes in the oil refining industry. Conventional catalytic cracking technology mostly adopts single riser reactor with equal diameter and reaction-regeneration system process. In the riser reaction-regeneration system, the preheated raw oil enters the riser reactor through the feed nozzle system, contacts, vaporizes and reacts with the high-temperature catalyst (regenerated agent) from the regenerator. During the reaction process, coke is continuously generated and deposited on the surface of the catalyst and the active center, which reduces the activity of the cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C07C11/06
CPCY02P20/52
Inventor 田辉平蒋文斌朱玉霞张久顺达志坚朱根权陈蓓艳宋海涛
Owner CHINA PETROLEUM & CHEM CORP
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