Methanol to aromatic catalyst containing two molecular sieves and preparation method

A molecular sieve and catalyst technology, applied in the field of methanol-to-aromatic catalyst and preparation, can solve the problems of loss of active components, influence on the yield of BTX light aromatics, and reduce the economy of methanol-to-aromatics, etc., and achieve the effect of reducing production costs.

Active Publication Date: 2016-03-30
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has high reactivity, but the selectivity of heavy aromatics is still high
In addition, due to the high activity of the catalyst, the yield of by-products such as dry gas and liquefied gas is high
[0009] At present, the molecular sieve carrier of methanol-to-aromatics catalyst is mainly ZSM-5 molecular sieve. Due to the limitation of molecular sieve channels, the selectivity of heavy aromatics in aromatics products can be

Method used

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  • Methanol to aromatic catalyst containing two molecular sieves and preparation method
  • Methanol to aromatic catalyst containing two molecular sieves and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of zinc-aluminum composite modified ZSM-5 molecular sieve

[0031] 100 g (dry basis weight) of SiO2 / Al 2 o 3 Nano ZSM-5 molecular sieve with a molar ratio of 30 was mixed with 750 grams of deionized water, heated to 80 °C under stirring conditions, and then 3.57 grams of Zn(NO 3 ) 2 ·6H 2 O, 36.78 g Al(NO 3 ) 3 9H 2 0; after stirring at constant temperature for 2h, adjust the slurry pH to 8 with ammonium bicarbonate; after aging with stirring at constant temperature for 3h, filter and dry to obtain zinc-aluminum modified ZSM-5 molecular sieve, the weight content of zinc oxide in molecular sieve is 1.0wt%, the weight content of aluminum oxide in molecular sieve is 5.0wt%, code is MZ-1 # ;

[0032] (2) Preparation of nickel-modified Y-type molecular sieve

[0033] 100 g (dry basis weight) of SiO 2 / Al 2 o 3 Y-type molecular sieve with a molar ratio of 5.0 was mixed with 500 grams of deionized water, heated to 75 °C under stirring conditions, a...

Embodiment 2

[0040] (1) Preparation of zinc-aluminum composite modified ZSM-5 molecular sieve

[0041] 100 g (dry basis weight) of SiO 2 / Al 2 o 3 Nano ZSM-5 molecular sieve with a molar ratio of 30 was mixed with 1000 g of deionized water, heated to 90 °C under stirring conditions, and then 3.57 g of Zn(NO 3 ) 2 ·6H 2 O, 3.53 g ZnSO 4 ·7H 2 O, 36.78 g Al(NO 3 ) 3 9H 2 O, 8.39 g Al 2 (SO 4 ) 3 ·16H 2 O; after stirring at constant temperature for 2h, adjust the pH of the slurry to 8.5 with ammonia; after aging with stirring at constant temperature for 5h, filter and dry to obtain zinc-aluminum modified ZSM-5 molecular sieve, the weight content of zinc oxide in the molecular sieve is 2.0wt %, the weight content of alumina in molecular sieve is 7.5wt%, and the code is MZ-2 # ;

[0042] (2) Preparation of nickel-modified Y-type molecular sieve

[0043] 100 g (dry basis weight) of SiO 2 / Al 2 o 3 Mix Y-type molecular sieve with a molar ratio of 5.0 and 750 grams of deionized ...

Embodiment 3

[0050] (1) Preparation of zinc-aluminum composite modified ZSM-5 molecular sieve

[0051] 100 g (dry basis weight) of SiO 2 / Al 2 o 3 Nano ZSM-5 molecular sieve with a molar ratio of 30 was mixed with 1000 grams of deionized water, heated to 85 ° C under stirring conditions, and then 6.70 grams of ZnCl were added in sequence 2 , 26.15 grams of AlCl 3 After stirring at constant temperature for 4h, adjust the slurry pH to 10 with ammonium carbonate and ammonia; after aging with stirring at constant temperature for 8h, filter and dry to obtain zinc-aluminum modified ZSM-5 molecular sieve, the weight content of zinc oxide in molecular sieve is 4.0wt%, the weight content of aluminum oxide in molecular sieve is 10wt%, code is MZ-3 # ;

[0052] (2) Preparation of nickel-modified Y-type molecular sieve

[0053] 100 g (dry basis weight) of SiO 2 / Al 2 o 3 Mix Y-type molecular sieve with a molar ratio of 5.0 with 1000 grams of deionized water, heat to 90 ° C under stirring cond...

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Abstract

The invention relates to a methanol to aromatic catalyst containing two molecular sieves and a preparation method. The methanol to aromatic catalyst comprises, based on the weight of the catalyst, 40 wt%-85 wt% of the total content of a zinc-aluminium compound modified ZSM-5 molecular sieve and a nickel modified Y-shaped molecular sieve, 0.5 wt%-5.0 wt% of rare earth oxide and the balance aluminium oxide binder, wherein the ratio of the weight content of the zinc-aluminium compound modified ZSM-5 molecular sieve to the modified Y-shaped molecular sieve is 9:1-1:1. The invention further discloses a method for preparing the catalyst. The methanol to aromatic catalyst is used in a methanol to aromatic process, has high light weight aromatic yield and is low in dry gas and liquefied gas productivity. The wastage rate of zinc oxide active components of the catalyst is low, and the stability is high.

Description

technical field [0001] The invention relates to the technical field of chemical catalysis for the production of aromatics, in particular to a catalyst for producing aromatics from methanol containing two molecular sieves and a preparation method. Background technique [0002] Aromatic hydrocarbons refer to hydrocarbons containing benzene rings, which are important basic raw materials in the petrochemical industry. Among them, BTX is called a first-class basic organic raw material, and is widely used in synthetic fibers, synthetic resins, synthetic rubbers and various fine chemical products. At present, aromatics mainly come from petroleum-based catalytic reforming of naphtha to produce oil and steam cracking of naphtha, and a small part comes from coal tar. As my country's dependence on foreign oil becomes higher and higher, the petroleum-based aromatics production technology may be limited. my country has abundant coal resources, so the development of coal-based methanol-t...

Claims

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Application Information

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IPC IPC(8): B01J29/80C07C1/20C07C15/02C07C15/04C07C15/06
CPCY02P20/52B01J29/80B01J29/106B01J29/46B01J2229/20C07C1/20C07C15/02C07C15/04C07C15/06
Inventor 郭春垒于海斌臧甲忠王银斌汪洋李晓云隋芝宇姜雪丹彭晓伟洪鲁伟
Owner CHINA NAT OFFSHORE OIL CORP
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