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Catalyst for coupling catalytic pyrolysis of methanol and naphtha, preparation method and application

A catalytic cracking and naphtha technology, applied in the direction of carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., can solve the problems of low yield of ethylene + propylene, improve yield, inhibit hydrogen transfer and carbon deposition, The effect of improving the yield of diene

Inactive Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] What the present invention aims to solve is the technical problem of low yield of ethylene+propylene in the process of producing ethylene and propylene by catalytic cracking prepared in the prior art

Method used

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  • Catalyst for coupling catalytic pyrolysis of methanol and naphtha, preparation method and application
  • Catalyst for coupling catalytic pyrolysis of methanol and naphtha, preparation method and application
  • Catalyst for coupling catalytic pyrolysis of methanol and naphtha, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take by weighing 240 grams of solution containing 30.7 grams of phosphoric acid and impregnate 200 grams of hydrogen ZSM-5 molecular sieve (SiO 2 with Al 2 o 3 The silicon-aluminum ratio is 20), aged at room temperature for 2-24 hours, dried at 100-140°C for 12 hours, and fired at 550°C for 6 hours. Take the previous step to obtain 100.0 grams of modified ZSM-5 molecular sieves, 10.0 grams of SAPO-34 molecular sieves (SiO 2 with Al 2 o 3 The ratio of silicon to aluminum is 0.01), 40.0 grams of kaolin, 238.1 grams of aluminum sol (21.0% Al 2 o 3 ) and 212.0% water were mixed evenly to form a slurry, which was sprayed to obtain microspheres with a particle size of 10-200 μm, and then calcined at 600°C for 4 hours to obtain a fluidized bed microsphere catalyst. The specific catalyst composition can be seen in Table 2.

[0023] When the reaction temperature is 650°C, the space velocity of naphtha is 0.7h -1 , the weight ratio of methanol to naphtha is 1.0, and the pr...

Embodiment 2-6

[0025] Catalysts b-f were prepared and evaluated according to the same preparation method, and the compositions and evaluation results of the catalysts can be seen in Table 3.

Embodiment 7-10

[0031] Using catalyst c, changing process conditions, the evaluation results obtained are listed in Table 4

[0032] Table 1

[0033] project data Density(20℃)kg / m3 704.6 Distillation Range Initial Distillation Range °C 40 Final boiling range °C 160 Saturated vapor pressure(20℃)kPa 50.2 Alkanes % (weight %) 65.18 Normal alkanes % in alkanes (weight %) >32.5 Cycloalkane % (weight %) 28.44 Olefin % (wt%) 0.17 Aromatics % (wt%) 6.21

[0034] Table 2

[0035]

[0036]

[0037] table 3

[0038]

[0039] Table 4

[0040]

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Abstract

The invention relates to a catalyst for coupling catalytic pyrolysis of methanol and naphtha, a preparation method and an application, to mainly solve the technical problem that the ethylene and propylene yield is low in a method for catalytic pyrolysis of methanol and naphtha to prepare ethylene and propylene in the prior art. The technical scheme that methanol and naphtha are adopted and contact a fluidized bed catalyst to prepare a material fluid containing ethylene and propylene in a situation of certain temperature, pressure, the weight ratio of methanol to naphtha, and the weight space velocity of methanol to naphtha. The fluidized bed catalyst contains a ZSM-5 composite molecular sieve modified by SAPO-34 and oxide of P, La or Mn is adopted, so that the problem above is well solved. The catalyst can be used for industrial production of ethylene and propylene prepared through catalytic pyrolysis of methanol and naphtha.

Description

technical field [0001] The present invention relates to a method for producing ethylene and propylene by coupled catalytic cracking of methanol and naphtha, in particular to a method for producing ethylene by catalytic cracking using ZSM-5 or ZSM-11 and SAPO-34 composite molecular sieve as catalyst active components Propylene method. Background technique [0002] Ethylene and propylene are the two most important basic organic chemical raw materials. Currently, global ethylene and propylene are mainly produced by steam cracking process. The steam cracking process has a series of disadvantages such as high reaction temperature (820-1000°C), high process energy consumption, low yield of ethylene and propylene, and low ethylene / propylene ratio (0.5-0.7). Catalytic cracking is the process of using catalysts to crack naphtha to produce light olefins. Compared with steam cracking, catalytic cracking has the advantages of low reaction temperature (600-780°C), significantly reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C07C1/20C07C4/06C07C11/04C07C11/06
CPCC07C1/20C07C4/06B01J29/40B01J29/405B01J29/48B01J29/85C07C2529/85B01J2229/18B01J35/19C07C11/04C07C11/06Y02P20/52Y02P30/20Y02P30/40
Inventor 汪哲明陈希强肖景娴
Owner CHINA PETROLEUM & CHEM CORP
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