Method for catalytic cracking petroleum hydrocarbons

A technology of catalytic cracking and petroleum hydrocarbons, applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of light oil components to be improved, and achieve the effects of decreasing olefin content, increasing heavy oil cracking capacity, and increasing yield

Active Publication Date: 2006-12-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the catalyst uses a conventional cracking catalyst, and the light oil components (liquefied gas + gasoline + light oil) in the cracked product still need to be improved

Method used

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  • Method for catalytic cracking petroleum hydrocarbons

Examples

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Effect test

example 1

[0043] Preparation of the zinc and rare earth modified Y zeolite described in the present invention.

[0044] 60 kg of deionized water, 3 kg (NH 4 ) 2 SO 4 And 3 kilograms (dry basis) NaY zeolite (Qilu Petrochemical Company Catalyst Factory produces, NaY 2 O content 14% by mass (unit cell constant 2.473 nanometers) was added into a stirred tank, and ion exchange was performed at 90° C. for 0.5 hours. Filter, wash the solid with water, and roast at 600°C under 100% water vapor for 2 hours to produce HUSY zeolite. Re-slurry with 60 kg of decationized water in HUSY zeolite, followed by 2 liters of mixed rare earth chloride and ZnCl 2 The mixed solution, in which the zinc content is 60 grams as ZnO, and the rare earth content is as RE 2 o 3 It was calculated as 150 g, and ion exchange was performed at 90° C. for 0.5 hours. After filtration, the obtained solid product was washed with water, and then calcined in air at 600°C for 2 hours to obtain modified zeolite a. The chemi...

example 2

[0046] Preparation of the zinc and rare earth modified Y zeolite described in the present invention.

[0047] 60 kg of deionized water, 3 kg (NH 4 ) 2 SO 4 , 3 kg of NaY zeolite described in Example 1 and 2 liters of rare earth content in RE 2 o 3 100 g of the chlorinated mixed rare earth solution was added to a stirred tank, and ion exchange was performed at 90° C. for 0.5 hours. After filtering, the resulting solid product was washed with water, and then calcined at 600°C under 100% water vapor for 2 hours to produce REUSY zeolite. Slurry the resulting REUSY zeolite with 60 kg of decationized water, then add 2 liters of ZnCl with a zinc content of 60 g in terms of ZnO 2 The solution was subjected to ion exchange at 90°C for 0.5 hours. After filtration, the solid was washed with water, and calcined in air at 600°C for 2 hours to obtain modified zeolite b, whose chemical composition and main physical and chemical properties are shown in Table 1.

example 3

[0049] Preparation of the zinc and rare earth modified Y zeolite described in the present invention.

[0050] 60 kg of deionized water, 3 kg (NH 4 ) 2 SO 4 , 3 kilograms of the NaY zeolite described in Example 1, 2 liters of ZnCl with a zinc content of 100 grams in terms of ZnO 2 The solution was added to a stirred tank, and ion exchange was carried out at 90° C. for 0.5 hours. Filter, wash the solid with water, and bake at 600°C under 100% water vapor for 2 hours to make ZnUSY zeolite. The resulting ZnUSY zeolite was beaten with 60 kg of decationized water, and then 2 liters of rare earth content was added to RE 2 o 3 Calculate 150 grams of chlorinated mixed rare earth solution, carry out ion exchange at 90°C for 0.5 hours, filter, wash the solid matter with water, and roast in air at 600°C for 2 hours to obtain modified zeolite c. For its chemical composition and main physical and chemical properties, see Table 1.

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Abstract

This invention discloses a method for catalytically pyrolyzing petroleum hydrocarbons. The method comprises: (1) introducing preheated petroleum hydrocarbons into a pyrolysis reactor containing two reaction zones; (2) catalytically pyrolyzing in the presence of water vapor and a hot catalytically pyrolyzing in the presence of water vapor and a hot catalyst in the first and the second reaction zones sequentially. The reaction temperature and time in the first reaction zones are 495-550 deg.C and 0.5-20 s, and those in the second reaction zone are 460-495 deg.C and 2-30 s. The catalyst comprises: Y-type zeolite modified with Zn and rare earth metals 25-50 wt.%, clay 20-50 wt.%, and inorganic oxides 20-50 wt.%. The contents of the Y-type zeolite are 0.5-10 wt. %, respectively. The method can lower the olefin content, and increase the lightweight oil yield in the products.

Description

technical field [0001] The invention is a catalytic cracking method of petroleum hydrocarbons, specifically, a catalytic cracking method of petroleum hydrocarbons which has two reaction zones and can effectively reduce the olefin content of gasoline products. Background technique [0002] With the increasingly stringent environmental protection requirements, gasoline products have developed from unleaded gasoline to new formula gasoline. In the standards of newly formulated gasoline, on the one hand, it is required to limit the vapor pressure and benzene content of gasoline, and on the other hand, it will gradually limit the content of olefin components. China began to implement new gasoline standards nationwide on January 1, 2003, requiring the content of olefins in gasoline components to be less than 35% by volume, and will further limit the content of olefins in gasoline in the future. [0003] Catalytic cracking is one of the main technologies for producing motor gasoli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
Inventor 龙军达志坚何鸣元田辉平蒋文斌陈蓓艳王振波徐志成宋海涛
Owner CHINA PETROLEUM & CHEM CORP
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