A fluidized catalytic cracking process

A fluid catalytic cracking, catalyst technology, applied in catalytic cracking, cracking, chemical instruments and methods, etc.

Active Publication Date: 2012-05-02
INDIAN OIL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] While multiple patents exist for regeneration of spent FCC catalysts and gasoline sulfur reduction additives, none of them deal with the reuse or direct use of external heavy metal poisoned spent or used FCC / RFCC catalysts with high metal concentrations, to Maintains activity of FCC / RFCC cycle catalysts with low metal concentrations, and acts as a gasoline sulfur reducer for FCC / RFCC cycle catalysts with low metal concentrations

Method used

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  • A fluidized catalytic cracking process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Effect of External Heavy Metal Poisoned Spent Catalyst in FCC Unit Operation

[0086] A spent catalyst poisoned with heavy metals from outside the FCC unit - Catalyst C was directly used to test its effectiveness in FCC unit A operation. The catalyst used in this experiment contained 90 wt% catalyst A, E-cat from FCC unit A and 10 wt% heavy metal poisoned spent catalyst C from FCC unit C. The results of experiments using feed A in a fluidized ACE-based unit are shown in Table 3.

[0087] Here it can be clearly seen that the use of 10 wt% external heavy metal poisoned spent catalyst increases both the conversion and the yield of LPG and propylene. The gasoline sulfur content was found to be reduced by 27.62 wt%.

[0088] An additional experimental item was aimed at retesting the effect of external heavy metal poisoned spent catalyst in another FCC unit B operation with corresponding E-cat and feed. Therefore, the catalyst used in this experiment contained 90 wt% Catal...

Embodiment 2

[0094] Heavy metal poisoned spent catalyst from outside the FCC unit was directly used to test its effectiveness in FCC unit operation. The catalyst used in this experiment contained a mixture of 60 wt% of the equilibrium catalyst with concentrations of 3500 and 7000 ppm of nickel and vanadium, and 40 wt% of heavy metal poisoned spent catalyst with concentrations of 3400 and 7000 ppm, respectively. 9000ppm nickel and vanadium. The results of experiments using Feed A in a fluidized ACE-based unit are shown in Table 4.

[0095] It is evident from the data that the conversion of the combined cycle catalyst obtained after adding the heavy metal poisoned spent catalyst to the equilibrium catalyst is 75.08 wt%. It is also evident that even after increasing the vanadium concentration, the activity of the catalyst is not affected. LPG yield % showed an increasing trend.

[0096] Table 4

[0097]

Embodiment 3

[0099] Heavy metal poisoned spent catalyst from outside the FCC unit was directly used to test its effectiveness in FCC unit operation. The catalyst used in this experiment contained a mixture of 70 wt% of the equilibrium catalyst (E-cat) and 30 wt% of the spent catalyst poisoned by heavy metals, wherein the equilibrium catalyst had nickel and vanadium concentrations of 3000 and 12000 ppm, respectively, and the spent catalyst poisoned by heavy metals had The concentrations were 3000 and 20000 ppm nickel and vanadium, respectively. Experimental results using feed A in a fluidized ACE-based unit are shown in Table 5.

[0100] It is evident from the data that the conversion of the recycled catalyst obtained after adding the spent catalyst to the equilibrium catalyst is 63.05 wt%. It is also evident that even after increasing the vanadium concentration, the activity of the catalyst is not affected. LPG yield % showed an increasing trend.

[0101] table 5

[0102]

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Abstract

The present invention relates to a fluidized catalytic cracking process for cracking hydrocarbon feed having organo-sulfur compound as an impurity, said process comprising: adding a heavy metal poisoned spent catalyst to an equilibrium catalyst to obtain a composite circulating catalyst, wherein the heavy metal poisoned spent catalyst is added in an amount to maintain the activity of the circulating catalyst; and obtaining a fluidized catalytic cracked product. The present invention further relates to fluidized catalytic cracked product obtained by the process of the present invention. The sulfur content of the fluidized catalytic cracked product mainly gasoline which is boiling in the range of C5-250oC reduced by more than 20 % (wt / wt). And Research Octane number of the fluidized catalytic cracked product is increased by more than 1 unit.

Description

technical field [0001] The present invention relates to a fluid catalytic cracking process for cracking hydrocarbon feeds containing organic sulfur compound impurities. The present invention also relates to the use of heavy metal poisoned FCC / RFCC spent catalysts for maintaining the activity of combined cycle catalysts and as a sulfur reducer in fluid catalytic cracking processes for reducing sulfur in catalytic cracking products. Background technique [0002] The fluid catalytic cracking process has been known since 1942. The history and development of the FCC method over time is well documented in the books "Fluid Catalytic Cracking Handbook by Reza Sadeghbeigi, Gulf publishing company", "Fluid catalytic cracking by Wilson" and various other documents. [0003] Cracking is generally defined as the decomposition of large molecular weight hydrocarbons into small molecular weight hydrocarbons. It can be done with heat or catalysis. In the fluid catalytic cracking process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/02
CPCB01J29/40B01J29/084C10G2300/305B01J29/80C10G11/187C10G2400/02B01J35/0006B01J2229/42C10G2300/701C10G2300/202
Inventor 萨拉范南·苏伯拉曼尼德巴希斯·巴塔查里亚卡思基扬妮·阿鲁马甘·维拉尤泰晤潘卡·库马尔·卡什利沃克里舍南·文卡塔查拉姆
Owner INDIAN OIL CORPORATION
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