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Method for preparing low-carbon olefin hydrocarbon with oxocompound

A technology for low-carbon olefins and oxides, which is used in the production of hydrocarbons from oxygen-containing organic compounds, chemical instruments and methods, and ethylene production, can solve problems such as hazards and product separation difficulties, achieve good technical results, and improve stripping efficiency. Effect

Active Publication Date: 2011-03-23
SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the process of producing low-carbon olefins from oxygenates, the catalyst deactivates faster in the reactor, and in the process of continuous regeneration, the catalyst entrains part of the N 2 , O 2 , CO X , NO X When impurities enter the reactor, these impurities will cause difficulties or even cause great harm to the separation of products, and provide a new method for producing low-carbon olefins from oxygenates

Method used

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  • Method for preparing low-carbon olefin hydrocarbon with oxocompound
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  • Method for preparing low-carbon olefin hydrocarbon with oxocompound

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Embodiment 1

[0019] 200,000 tons / year of methanol to produce low-carbon olefins figure 1 The anti-regeneration system for the continuous regeneration of the catalyst shown and figure 2 The stripping section of the degasser is shown. Reactor diameter 3100mm, 0.06MPaG, reaction temperature 450°C, space velocity 1.0 hour -1 , the line velocity of the lower stripping section is 0.08 m / s, and the line velocity of the upper stripping section is 0.25 m / s. SAPO-34 molecular sieve catalyst is used. The reaction raw material is pure methanol. The concentration of impurities at the reactor outlet is shown in Table 1.

Embodiment 2

[0021] 300,000 tons / year of methanol production of low-carbon olefins figure 1 The anti-regeneration system for the continuous regeneration of the catalyst shown and figure 2 The stripping section of the degasser is shown. Reactor diameter 3900mm, 0.06MPaG, reaction temperature 450°C, space velocity 5.0 hours -1 , the line velocity of the lower stripping section is 0.12 m / s, and the line velocity of the upper stripping section is 0.3 m / s. SAPO-34 molecular sieve catalyst is used. The reaction raw material is pure methanol. The concentration of impurities at the reactor outlet is shown in Table 1.

Embodiment 3

[0023] 400,000 tons / year of methanol production of low-carbon olefins figure 1 The anti-regeneration system for the continuous regeneration of the catalyst shown and figure 2 The stripping section of the degasser is shown. Reactor diameter 4300mm, 0.06MPaG, reaction temperature 470°C, space velocity 3.0 hours -1 , the line velocity of the lower stripping section is 0.17 m / s, and the line velocity of the upper stripping section is 0.35 m / s. SAPO-34 molecular sieve catalyst is used. The reaction raw material is pure methanol. The concentration of impurities at the reactor outlet is shown in Table 1.

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Abstract

The invention relates to a method for producing a low carbon olefin by an oxycompound, which mainly solves the problem that a regenerated catalyst carrying partial N2, O2, CO(X), NO(X) impurities to a reactor brings difficulties and even causes great harm to the product separation in the process of low carbon olefin production by oxycompound. The invention well solves the problem by adopting the technical proposal that the regenerated catalyst firstly passes a degassing tank to remove impurities and then returned to a fluidized bed reactor circularly, and the method can be used for the industrial production of producing the low carbon olefin by oxycompound.

Description

technical field [0001] The invention relates to a method for producing low-carbon olefins from oxygenates, in particular to a method for producing low-carbon olefins from oxygenates by using a continuous catalyst regeneration fluidized bed reaction and regeneration system. Background technique [0002] Petrochemical industry is an important pillar industry in the national economy. It provides a large amount of chemical raw materials for industry, agriculture, transportation and national defense. It is one of the most relevant and leading industrial sectors in the national economy. Ethylene and propylene are the two most important basic raw materials for modern petrochemical industry. [0003] For a long time, coal or natural gas-to-synthesis gas, syngas-to-methanol and olefin separation technologies have had large-scale and mature experience, but the process from methanol to olefins is a breakpoint and difficulty in the industrial chain from synthesis gas to olefins, and thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/02B01J29/85
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 钟思青齐国祯忻晓琦王华文
Owner SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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