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Method for producing olefin by catalytically cracking

A catalytic cracking, olefin technology, applied in catalytic cracking, bulk chemical production, chemical instruments and methods, etc., can solve the problem of low catalyst activity, and achieve the effect of high activity, high sphericity, and not easy to agglomerate

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is the low activity of the molecular sieve fluidized bed catalyst used in the existing catalytic cracking technology to produce olefins. A new method for catalytic cracking to produce olefins is provided. The catalyst used in the method has catalytic Advantages of high performance

Method used

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  • Method for producing olefin by catalytically cracking
  • Method for producing olefin by catalytically cracking
  • Method for producing olefin by catalytically cracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 500 grams of kaolin and 2 grams of safflower powder, mix evenly, add 2000 grams of distilled water, shear at high speed with a high-speed shear for 30 minutes, then add 100 grams of aluminum sol containing 20% ​​by weight of aluminum oxide and 40% by weight of silicon oxide % of aluminum sol 400 grams, continue high-speed shearing for 30 minutes, then add 1 gram of triammonium citrate, 4 grams of calcium carbonate, continue high-speed shearing for 30 minutes, measure the particle size of this suspension with a laser particle size analyzer, the average The particle size is 2 microns. Spray molding with a spray dryer, the spray molding conditions are: inlet temperature 240°C, outlet temperature 120°C, centrifugal speed 10000 rpm, cyclone pressure difference at the outlet is 0.7KPa, feed rate is 1 kg / hour, and the formed micro Ball Catalyst Precursor I. The catalyst precursor I was calcined by temperature programming at 400° C. for 3 hours, and then at 650° C. for 3...

Embodiment 2～10

[0036] According to the method of Example 1, using the ingredients and preparation conditions in Table 1 and Table 3, wherein the silica sol contains 40% by weight of silicon dioxide, the performance of the prepared fluidized bed catalyst is shown in Table 2.

[0037]

[0038]

[0039] table 3

[0040]

Embodiment 11

[0042] Get the method for 200 grams of embodiment 1 to make fluidized bed ZSM-5 / mordenite intergrowth molecular sieve catalyst, put into internal diameter and be the fluidized bed reactor of 50 millimeters, adopt the component that Shanghai Gaoqiao petrochemical company produces is C 4 ~C 10 The light oil is used as the raw material (see Table 4 for the physical properties of the raw material), and the activity of the catalyst is evaluated. The reaction temperature range is 680 ° C, the reaction pressure is 0.02 MPa, and the weight space velocity is 1 hour -1 , Water / feedstock oil weight ratio is 1: 1 under evaluation, product distribution is shown in Table 5, obtains ethylene weight yield and is 28%, and propylene weight yield is 22%, and diene weight total yield is 50%.

[0043] Table 4 Light Oil Raw Material Indicators

[0044] project data Density(20℃)kg / m 3 704.6 Distillation Range Initial Distillation Range °C 40 Final boiling range °C 1...

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Abstract

The invention relates to a method for producing olefin by catalytically cracking, which mainly solves the problem of low activity of a fluid catalyst in a current method for producing olefin by catalytically cracking. According to the method for producing olefin by catalytically cracking, C4-C12 olefins are taken as a raw material, under the condition that the reaction temperature is 550-750 DEG C, the reaction gauge pressure is 0.001MPa-0.5MPa, the weight space velocity of the reaction is 0.05-4 hours<-1> and the weight ratio of water to light oil is 0-4:1, the raw material is contacted withthe catalyst through a catalyst bed layer for reacting to generate light olefin, the catalyst is a binderless ZSM-5 / a mordenite fluid catalyst. The technical scheme better solves the problem, and thepresent invention can be used in industrial production for producing olefin by catalytically cracking.

Description

technical field [0001] The invention relates to a method for producing olefins by catalytic cracking. Background technique [0002] As the leader of the petrochemical industry, the ethylene propylene industry plays a pivotal role in the development of the national economy. With the development of society, the market demand for ethylene propylene in my country has increased sharply, the import volume of ethylene propylene and its downstream products has increased year by year, and the market share of domestic products is less than half. Ethylene and propylene can be used to produce plastics and other chemical products, and are important organic chemical raw materials. With the progress and development of modern society, their demand is increasing. At present, more than 98% of the world's ethylene production comes from steam cracking technology, and propylene production is mainly obtained in two forms: the co-product of steam cracking to produce ethylene and the by-product of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/04C07C11/06B01J29/80C10G11/05
CPCY02P20/52
Inventor 马广伟张慧宁
Owner CHINA PETROLEUM & CHEM CORP
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