Production method of propylene

A propylene and catalyst technology, applied in the field of methanol conversion to produce propylene, can solve the problem of reducing the selectivity of olefins

Active Publication Date: 2019-04-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Patent US 4,062,905 discloses a method for preparing a hydrocarbon mixture rich in ethylene and propylene by using methanol as a raw material and an eight-member ring small-pore molecular sieve as a catalyst. The yield of methane and propane is relatively high, which reduces the selectivity of olefins

Method used

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  • Production method of propylene
  • Production method of propylene
  • Production method of propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 1260 grams of water, 78.4 grams of sodium hydroxide, 168 grams of ethylenediamine, 103.7 grams of aluminum sulfate and 700 grams of silica sol into the beaker in a certain order, stir and age at room temperature for 1 hour, and then change the temperature in the crystallization kettle at 160-190 °C After 2 days of crystallization, ZSM-5 / ZSM-35 mixed crystal raw powder with a silicon-aluminum ratio of 30 was obtained.

[0044] 20 grams of ZSM-5 / ZSM-35 mixed crystal molecular sieves washed, dried and roasted after crystallization were placed in 400 milliliters of 5% NH by weight 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, the ammonium type ZSM-5 / ZSM-35 mixed crystal molecular sieve is obtained by washing and drying. 10 grams of ammonium-type ZSM-5 / ZSM-35 mixed crystal molecular sieves were added with 3 grams of 40% silica sol as a binder, and extruded. After drying at 120°C and calcining at 550°C...

Embodiment 2-3

[0050] Changing the SiO of ZSM-5 / ZSM-35 Mixed Crystal 2 / Al 2 o 3 Ratio, synthesize ZSM-5 / ZSM-35 mixed crystal former powder according to the method identical with embodiment 1, moulding, make catalyst B (SiO 2 / Al 2 o 3 =100) and Catalyst C (SiO 2 / Al 2 o 3 =200), and evaluated under the same conditions, the reaction results are shown in Table 1.

Embodiment 4-7

[0052] The catalyst numbered A is impregnated and modified with diammonium hydrogen phosphate solution, so that the phosphorus content is 0.1-0.5% (weight fraction). After immersing at room temperature for several hours, rise to 60°C for vacuum drying, and bake at 550°C for 4 hours to obtain catalyst D (phosphorus content 0.2%), catalyst E (phosphorus content 0.4%), catalyst F (phosphorus content 0.6%) and catalyst G (phosphorus content 0.8%). All phosphorus-containing catalysts were in-situ treated with 100% steam for 48 h before feeding into the reaction. The reactivity of the catalyst is shown in Table 1.

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Abstract

The invention relates to a method for conversion production of propylene from methanol. The method solves the problem that the prior art has low product propylene selectivity. The method comprises that methanol as a raw material undergoes a reaction to produce propylene in the presence of a ZSM-35 / ZSM-5 mixed crystal molecular sieve as a catalyst having a molar ratio of Si to Al of 5 to 500 under conditions of a reaction temperature of 400 to 600 DEG C, reaction pressure of 0 to 0.5MPa, a liquid phase space velocity of 0.5 to 3.0h<-1> and a molar ratio of water to alcohol of 0.5 to 3.0. The method well solves the above problem and can be used for industrial conversion production of propylene from methanol.

Description

technical field [0001] The present invention relates to a method for producing propylene, in particular to a method for converting methanol to produce propylene. Background technique [0002] The demand for basic chemical raw materials such as propylene and ethylene continues to grow. At present, propylene and ethylene mainly come from naphtha steam cracking and catalytic cracking. The main raw materials are still petroleum hydrocarbons. Due to the increasingly scarce petroleum resources, the price is getting more and more expensive , The contradiction between the supply and demand of propylene and ethylene has become increasingly prominent. Therefore, developing an economically feasible non-petroleum route to increase the production of light olefins such as propylene and ethylene is urgently pursued by commercial companies in various countries. The production process of producing methanol from coal, natural gas or even biomass through synthesis gas is mature, and the techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/06B01J29/80
CPCY02P20/52
Inventor 赵国良徐建军滕加伟何万仁金文清
Owner CHINA PETROLEUM & CHEM CORP
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