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Technical method for preparing aromatic hydrocarbon through methanol aromatization

A process method and aromatization technology, which are applied in the field of aromatic hydrocarbon production and chemical industry, can solve the problems of lack of comprehensive utilization and low conversion rate of non-aromatic liquid phase products, and achieve the improvement of total yield, reduction of aromatic hydrocarbon separation difficulty, and high methanol conversion rate. and the effect of aromatic selectivity

Active Publication Date: 2014-06-18
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no comprehensive utilization of C in this process 3 components
In addition, due to the C in the gas phase product 4 The components in the non-aromatic liquid phase product are mainly alkanes, which are directly returned to the aromatization catalyst bed, which will cause C 4 and low conversion of non-aromatic liquid phase products

Method used

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  • Technical method for preparing aromatic hydrocarbon through methanol aromatization
  • Technical method for preparing aromatic hydrocarbon through methanol aromatization
  • Technical method for preparing aromatic hydrocarbon through methanol aromatization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The catalyst for methanol alkylation is Zn-ZSM-5 nanometer molecular sieve catalyst (the silicon-aluminum ratio of ZSM-5 molecular sieve is 35, and the loading capacity of ZnO is 4.0wt%), and the catalyst for olefin aromatization is nanometer ZSM-5 modified by hydrothermal treatment. Molecular sieve catalyst (the silicon-aluminum ratio of ZSM-5 molecular sieve is 50). The process conditions for the aromatization of methanol and olefins are: the reaction pressure is 0.5MPa, the temperature is 420°C, and the mass space velocity of methanol is 1.0h -1 . The PONA composition of the product after methanol and olefin aromatization reaction is shown in Table 1.

[0032] The product of methanol and olefin aromatization reactor enters the non-aromatic cracking reactor equipped with Ni-ZSM-5 molecular sieve catalyst (the loading capacity of NiO is 2.0wt%) for reaction. The process conditions of non-aromatic cracking are: reaction pressure 0.5MPa, temperature is 360℃, mass space...

Embodiment 2

[0040] The catalyst for methanol alkylation is Zn-ZSM-5 nanometer molecular sieve catalyst (the silicon-aluminum ratio of ZSM-5 molecular sieve is 35, and the loading capacity of ZnO is 4.0wt%), and the catalyst for olefin aromatization is nanometer ZSM-5 modified by hydrothermal treatment. Molecular sieve catalyst (the silicon-aluminum ratio of ZSM-5 molecular sieve is 50). The process conditions for the aromatization of methanol and olefins are: the reaction pressure is 0.1MPa, the temperature is 380°C, and the mass space velocity of methanol is 0.5h -1 .

[0041] The product of methanol and olefin aromatization reactor enters the non-aromatic cracking reactor equipped with Ni-ZSM-5 molecular sieve catalyst (the loading capacity of NiO is 2.0wt%) for reaction. The process conditions of non-aromatic cracking are: reaction pressure 0.1MPa, temperature is 360℃, mass space velocity is 0.5h -1 . After the product is separated by an oil-water separator, a deethanizer and a dehe...

Embodiment 3

[0044] Methanol hydrocarbonization catalyst adopts Ga-Zn-ZSM-5 nano-molecular sieve catalyst (the silicon-aluminum ratio of ZSM-5 molecular sieve is 35, Ga 2 o 3 The loading amount is 1.0wt%, and the loading amount of ZnO is 3.0wt%), and the olefin aromatization catalyst is a nano ZSM-5 molecular sieve catalyst modified by hydrothermal treatment (the silicon-aluminum ratio of the ZSM-5 molecular sieve is 50). The process conditions for the aromatization of methanol and olefins are: the reaction pressure is 0.5MPa, the temperature is 420°C, and the mass space velocity of methanol is 1.0h -1 .

[0045] The product of methanol and olefin aromatization reactor enters the non-aromatic cracking reactor equipped with Ni-ZSM-5 molecular sieve catalyst (the loading capacity of NiO is 3.0wt%) for reaction. The process conditions of non-aromatic cracking are: reaction pressure 0.5MPa, temperature 380℃, mass space velocity 1.0h -1 . After the product is separated by an oil-water separ...

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Abstract

The invention relates to a technical method for preparing aromatic hydrocarbon through methanol aromatization. The technical method is characterized by comprising the steps: firstly, reacting methanol in a fixed-bed reactor filled with a methanol hydrocarbonylation reaction catalyst and an olefin aromatization catalyst, enabling the reacted product to enter a reactor filled with a non-aromatic cracking agent, reacting, separating the product to obtain dry gas, C<3+> non-aromatic hydrocarbon and aromatic hydrocarbon, wherein the dry gas and the aromatic hydrocarbon are output from the system as products, the C<3+> non-aromatic hydrocarbon is dehydrogenated after entering a dehydrogenation reactor, the dehydrogenated C<3+> non-aromatic hydrocarbon returns a methanol hydrocarbonylation reactor for continuing reaction. Through the technique, the methanol conversion, olefin aromatization, non-aromatic cracking and alkane dehydrogenation technology are combined, so that no only can the yield and selectivity of aromatic hydrocarbon be improved, but also the separation difficulty of aromatic hydrocarbon can be lowered. Through the technique, the total yield of the aromatic hydrocarbon (based on mass of methanol) can achieve 30-34%.

Description

technical field [0001] The invention relates to the preparation technology of aromatic hydrocarbons, in particular to a process method for preparing aromatic hydrocarbons by aromatization of methanol, belonging to the technical field of aromatic hydrocarbon production and chemical engineering. Background technique [0002] Aromatic hydrocarbons refer to hydrocarbons containing benzene rings, which are important basic raw materials for the petrochemical industry. Among the total of about eight million known organic compounds, aromatic hydrocarbon compounds account for about 30%, of which BTX is called a primary basic organic compound. Raw material, widely used in synthetic fiber, synthetic resin, synthetic rubber and various fine chemical products. At present, aromatics mainly come from catalytic reforming of naphtha fractions to produce oil and pyrolysis gasoline, and a small part comes from coal tar. In recent years, the technology of producing BTX aromatics through aromat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/02C07C15/04C07C15/06C07C15/067C07C1/20C07C2/42
CPCY02P20/52
Inventor 于海斌臧甲忠姚烨付玉娥傅送保郭春垒王银斌汲银平张雪梅成宏
Owner CHINA NAT OFFSHORE OIL CORP
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