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MTBE device methanol recovery system and process

A methanol recovery and methanol technology, applied in the chemical industry, sustainable manufacturing/processing, distillation and separation, etc., can solve the problems of acid corrosion, packing or sieve clogging, corrosion leakage, etc. in the methanol recovery system, so as to reduce equipment corrosion and leakage, Compact structure and significant social benefits

Inactive Publication Date: 2021-07-02
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Affected by factors such as catalyst entrainment of free acid, catalyst deactivation and desulfurization, etc., the methanol recovery system presents acid corrosion phenomenon
Corrosion leakage of similar production equipment, packing or sieve plate clogging occur from time to time, which has certain adverse effects on the safe production of the equipment

Method used

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  • MTBE device methanol recovery system and process

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Embodiment Construction

[0026] The features and principles of the present invention will be described in detail below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, not to limit the protection scope of the present invention.

[0027] Such as figure 1 As shown, the methanol recovery system of this kind of MTBE unit includes a methanol raw material tank and a carbon four raw material tank connected to a feed mixer. The feed mixer is connected to a catalytic distillation tower through a purifier, and the top of the catalytic distillation tower is refluxed with the catalytic distillation Tank connection, the bottom is connected to the MTBE product tank, the catalytic distillation reflux tank is connected to the reflux of the catalytic distillation tower through the pipeline, and the C4 tower is connected through the pipeline. One way is connected to the isobutane product tank, the C4 tower reflux tank is connected to the C4 tower refl...

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Abstract

The invention discloses a MTBE device methanol recovery system and a process. The MTBE device methanol recovery system comprises a methyl alcohol raw material tank and a C4 raw material tank which are connected with a feeding mixer, the feeding mixer is connected with a catalytic distillation tower through a purifier, the top of the catalytic distillation tower is connected with a catalytic distillation reflux tank, and the bottom of the catalytic distillation tower is connected with an MTBE product tank; the catalytic distillation reflux tank is in reflux connection with the catalytic distillation tower through a pipeline and is connected with a C4 tower through a pipeline, one path of the C4 tower is connected with a C4 tower reflux tank, one path of the C4 tower is connected with a heavy C4 product tank, and one path of the C4 tower is connected with an isobutane product tank; one path of the C4 tower reflux tank is in reflux connection with the C4 tower, one path of the C4 tower reflux tank is connected with an isobutane product tank, the other path of the C4 tower reflux tank is a methanol recycling pipeline, and the C4 tower reflux tank is connected with a methanol raw material tank through a methanol recycling pipeline. The invention relates to an innovative process for recovering methanol by an MTBE device, which does not adopt a common extraction and conventional distillation method in a methanol recovery process, and adopts an azeotropic distillation method for methanol recovery. No water participates in the recovery process, so that the problem of acid corrosion of equipment can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of methanol recovery, in particular to a methanol recovery system and process of an MTBE device. Background technique [0002] The raw materials of MTBE (methyl tert-butyl ether) plant are mixed C4 liquefied gas raw materials containing isobutene components and high-grade methanol, using large-pore diameter, strongly acidic cation exchange resins as catalysts. Under certain temperature and pressure conditions, the isobutene in the raw material C4 reacts with methanol under the action of the catalyst in the reactor to synthesize MTBE, and then the MTBE product is separated through the catalytic distillation tower. Unreacted carbon four components (unreacted carbon four) and methanol are separated from the methanol recovery system. The device is mainly composed of four parts: etherification reaction, catalytic distillation, methanol recovery and MTBE refining. [0003] The methanol in the overhead distillate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/36B01D3/00C07C31/04C07C29/82C07C43/04C07C41/06
CPCB01D3/36B01D3/009C07C29/82C07C41/06C07C31/04C07C43/046Y02P20/10
Inventor 胡伟刘天波邵建海刘学东刘衍攀蒙毅张立海王帅牟万里曹云志薛泽田
Owner CHINA PETROLEUM & CHEM CORP
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