Preparation method for adhesive-free fluidized bed catalyst

A fluidized bed and catalyst technology, which is applied in the field of preparation of molecular sieve fluidized bed catalysts, can solve the problem of low catalytic activity of fluidized bed catalysts, and achieve the effects of good catalyst activity, good diffusion performance, good diffusion performance and smooth surface

Active Publication Date: 2013-04-03
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 problem of low catalytic activity of fluidized bed catalysts in the prior art, and a new preparation method of binderless fluidized bed catalysts is provided

Method used

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  • Preparation method for adhesive-free fluidized bed catalyst
  • Preparation method for adhesive-free fluidized bed catalyst
  • Preparation method for adhesive-free fluidized bed catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]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 400 grams of ZSM-5 molecular sieve with a silicon-aluminum molecular ratio of 30, and then high-speed shear Cut for 30 minutes, then add 500 grams of aluminum sol containing 20% ​​by weight of alumina, continue high-speed shearing for 30 minutes, then add 1 gram of triammonium citrate, continue high-speed shearing for 30 minutes, and measure the suspension with a laser particle size analyzer The particle size, the average 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 ...

Embodiment 2～10

[0029] 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.

[0030]

[0031]

[0032] table 3

[0033]

Embodiment 11

[0035] Get the method for 200 grams of embodiment 1 to make fluidized bed ZSM-5 catalyst, put into inner 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%.

[0036] Table 4 Light Oil Raw Material Indicators

[0037] project

data

Density(20℃)kg / m 3

704.6

Distillation Range Initial Distillation Range °C

40

Final boiling range °C

160

Saturate...

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Abstract

The invention relates to a preparation method for an adhesive-free fluidized bed catalyst. The problem of low activity of the fluidized bed catalyst in the prior art is mainly solved. The problem is well solved by adopting the technical scheme that the preparation method for the fluidized bed catalyst comprises the following steps of: (a) uniformly mixing molecular sieve, adhesive, a matrix material, a pore expanding agent, dispersant and a liquid medium to form suspension; (b) performing high-speed shearing and dispersion, and controlling the granularity of the materials in the suspension tobe between 0.1 and 5 microns; (c) performing spray drying on the suspension to form a micro-spherical catalyst precursor I; (d) roasting the micro-spherical catalyst precursor I at the temperature ofbetween 300 and 700 DEG C for 1 to 10 hours to obtain a catalyst precursor II; (e) putting the catalyst precursor II into template steam, and crystallizing at the temperature of between 100 and 200 DEG C for 10 to 200 hours to obtain a catalyst precursor III; and (f) roasting the micro-spherical catalyst precursor III at the temperature of between 400 and 700 DEG C for 1 to 10 hours to obtain a catalyst finished product. The catalyst can be applied to the reaction process of preparing low-carbon olefin by catalytic pyrolysis of light oil.

Description

technical field [0001] The invention relates to a preparation method of a binder-free fluidized bed catalyst, in particular to a preparation method of a molecular sieve fluidized bed catalyst used in the reaction of light oil catalytic cracking to produce light olefins. 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 c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/00
CPCY02P20/52
Inventor 马广伟张惠明
Owner CHINA PETROLEUM & CHEM CORP
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