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Process and plant for the production of methanol with isothermal catalytic beds

A catalytic bed and isothermal technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., to reduce the risk of overheating or overheating, reduce construction costs, and achieve precise control effects

Active Publication Date: 2013-06-26
CASALE SA
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, this arrangement has the disadvantage that the flow into the second reactor has a smaller content of fresh gas, so the reaction is essentially concentrated in the first reactor

Method used

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  • Process and plant for the production of methanol with isothermal catalytic beds
  • Process and plant for the production of methanol with isothermal catalytic beds

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Experimental program
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Embodiment Construction

[0033] refer to figure 1 , the methanol synthesis loop L comprises three isothermal catalytic beds arranged in two reactors. Reactor 10 contains two catalytic beds 11 and 12 , while the other reactor 20 contains a third catalytic bed 21 .

[0034] The supplementary gas 100 is compressed in the main compression section 30 to obtain a compressed gas feed 101 , which is mixed as feed with a cycle gas 112 downstream of said compression section 30 . The mixture 120 of fresh gas 101 and cycle gas 112 is divided into three fractions 102 , 103 and 104 .

[0035] The first portion 102 forms the feed gas 105 for the first catalytic bed 11 after preheating in the gas effluent heat exchanger 50 . In the space 13 located inside the reactor 10 and between the catalytic bed 11 and the catalytic bed 12 , the second portion 103 is mixed with the effluent of said catalytic bed 11 . Thus, the second section 103 quenches the effluent of the first bed 11 and assists in controlling the temperatu...

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Abstract

A process for the synthesis of methanol, comprising the steps of reforming a hydrocarbon source obtaining a make-up gas feed (101 ), feeding said make up gas to a synthesis loop (L), converting said make up gas to methanol (108) in a substantially isothermal catalytic environment, wherein said catalytic environment comprises a plurality of isothermal catalytic beds (1 1, 12, 21 ) preferably arranged in series, and at least a portion of make-up gas (101 ) is mixed with recycle gas (1 12) from the loop (L), obtaining a gaseous mixture of fresh gas and recycle gas, and at least a portion of said gaseous mixture is directed between two consecutive catalytic beds acting as a quench gas. A related plant is also disclosed.

Description

technical field [0001] The invention relates to a method and a device for synthesizing methanol by using an isothermal reactor. Background technique [0002] A device for synthesizing methanol mainly includes a front-end section and a synthesis loop. In the front-end section, carbon monoxide CO and hydrogen H are generated by converting hydrocarbon sources. 2 The supplementary synthesis gas is reacted in a catalytic environment at suitable pressure and temperature (typically 200°C to 300°C and 40bar to 150bar) in the synthesis loop. The synthesis loop may comprise one or more reactors, each reactor comprising a catalytic bed contained in a pressure vessel. The synthesis loop delivers a hot gaseous methanol stream which is condensed to obtain liquid crude methanol which is subsequently purified in the distillation section. will contain hydrogen gas (H 2 ) is separated from the liquid crude methanol and at least a part of said gaseous fraction is recycled to the synthesis l...

Claims

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Application Information

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IPC IPC(8): B01J8/04C07C29/152C07C31/04
CPCB01J8/0453B01J8/0457B01J8/0473B01J8/0492B01J8/0496B01J2208/00274B01J2219/00006B01J2219/0004C07C29/1512C07C31/04C07C29/32
Inventor 法比奥·劳伦齐
Owner CASALE SA
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