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Technique for processing methanol-to-propylene by-products

A technology for preparing propylene from methanol and processing technology, which is applied in the field of aromatics chemical industry, can solve the problems of unreported processing technology of MTP by-products, etc., and achieves the effects of high aromatics yield and low energy consumption.

Active Publication Date: 2015-07-08
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The current low-quality gasoline and liquefied gas processing technology is mainly aimed at catalytic gasoline and low-carbon alkanes raw materials, and the processing technology for MTP by-products has not been reported

Method used

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  • Technique for processing methanol-to-propylene by-products
  • Technique for processing methanol-to-propylene by-products
  • Technique for processing methanol-to-propylene by-products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Aromatization of MTP liquid hydrocarbon by-products

[0033] The liquid hydrocarbon by-products of the MTP process first enter the first-stage olefin aromatization reactor. The catalyst is nano ZSM-5 molecular sieve modified by hydrothermal treatment at 450°C. The reaction temperature is 280°C, the pressure is 0.5MPa, and the mass space velocity is 1.0 h -1 react under the conditions. Then enter the second-stage alkane aromatization reactor, the catalyst is a ZSM-5 molecular sieve catalyst modified by Zn and Ni, wherein the loading of ZnO is 2.0wt%, and the loading of NiO is 1.0wt%. The reaction conditions are temperature 380°C, pressure 0.5MPa, mass space velocity 1.0h -1 . The properties of the MTP liquid hydrocarbon by-product raw materials are shown in Table 1, and the reaction results are shown in Table 2.

[0034] (2) Aromatization of by-products of MTP liquefied petroleum gas

[0035] The by-products of MTP liquefied gas and methanol are used as raw mate...

Embodiment 2

[0037] (1) Aromatization of MTP liquid hydrocarbon by-products

[0038] The liquid hydrocarbon by-products of the MTP process first enter the first-stage olefin aromatization reactor. The catalyst is nano ZSM-5 molecular sieve modified by hydrothermal treatment at 550°C. The reaction temperature is 300°C, the pressure is 1.0MPa, and the mass space velocity is 2.0 h -1 react under the conditions. Then enter the two-stage alkane aromatization reactor, the catalyst is ZSM-5 molecular sieve catalyst modified by Zn, Ni, La, the loading of ZnO is 2.0wt%, the loading of NiO is 1.0wt%, La 2 o 3 The loading amount is 1.0wt%. The reaction conditions are temperature 420°C, pressure 1.0MPa, mass space velocity 1.0h -1 , and the reaction results are shown in Table 2.

[0039] (2) Aromatization of by-products of MTP liquefied petroleum gas

[0040] The by-products of MTP liquefied gas and methanol are used as raw materials, and the properties of the liquefied gas raw materials are sho...

Embodiment 3

[0042] (1) Aromatization of MTP liquid hydrocarbon by-products

[0043] The liquid hydrocarbon by-products of the MTP process first enter the first-stage olefin aromatization reactor. The catalyst is nano ZSM-5 molecular sieve modified by hydrothermal treatment at 600°C. The reaction temperature is 340°C, the pressure is 0.5MPa, and the mass space velocity is 4.0 h -1 react under the conditions. Then enter the second-stage alkane aromatization reactor, the catalyst is ZSM-5 molecular sieve catalyst modified by Zn and Cr, the loading of ZnO is 2.0wt%, Cr 2 o 3 The loading amount is 3.0wt%. The reaction conditions are temperature 450°C, pressure 0.5MPa, mass space velocity 3.0h -1 , and the reaction results are shown in Table 2.

[0044] (2) Aromatization of MTP liquefied gas by-products

[0045] The by-products of MTP liquefied gas and methanol are used as raw materials, and the properties of the liquefied gas raw materials are shown in Table 3. Liquefied petroleum gas m...

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Abstract

The invention relates to a technique for processing methanol-to-propylene by-products. The technique is characterized by comprising the steps as follows: a liquid hydrocarbon by-product of methanol-to-propylene (MTP) is separated to obtain a dry gas, a liquefied gas and C5<+> non-aromatic and aromatic hydrocarbons after passing through two sections of fixed bed reactors of olefin aromatization and alkane aromatization; the dry gas and aromatic hydrocarbon are discharged out of a reaction system as products; the C5<+> non-aromatic hydrocarbon is returned to the alkane aromatization reactor to continue to react; the liquefied gas and the liquefied gas of the MTP process by-product enter the alkane aromatization reactor; a heat source required for aromatization of the liquefied gas is provided by a mode of adding methanol; the liquefied gas is converted into a mixed hydrocarbon product of taking aromatic hydrocarbon as a main component under the action of a molecular sieve based catalyst; and the mixed hydrocarbon product enters the dethanizer to separate after being processed by an oil-water separator. By adopting the process, gasoline aromatization and liquefied gas aromatization are combined, and the MTP by-product is effectively converted into the hydrocarbons. By adopting the process, the actual gaining rate of the liquid hydrocarbon by-product of the MTP can be up to 65-120%, and the hydrocarbon yield of liquid aromatization can be up to 32-40%.

Description

technical field [0001] The invention belongs to the technical field of aromatics chemical industry, and in particular relates to a process method for processing by-products from methanol to propylene. Background technique [0002] Propylene is the second largest petrochemical base material after ethylene, and its largest use is to produce polypropylene. At present, more than 95% of propylene comes from the by-products of steam cracking to produce ethylene and the by-products of FCC units in refineries. However, due to the instability of the world's oil supply and the plight of my country's lack of oil resources, the source of propylene, an important raw material for the development of petrochemical industry, is greatly restricted. The development of coal-methanol-to-propylene (MTP) process is not only conducive to the efficient utilization of coal, but also can alleviate the tense situation of domestic propylene supply. Therefore, methanol-to-propylene has developed rapidl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/04C07C15/06C07C15/067C07C15/02C07C2/76C07C2/88
CPCY02P20/52
Inventor 郭春垒于海斌臧甲忠王银斌舒畅姜雪丹成宏南军汪洋李滨
Owner CHINA NAT OFFSHORE OIL CORP
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