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Integrated preparation and separation process

A separation method, gas separation technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc.

Inactive Publication Date: 2008-01-09
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The disadvantage of this method is that it requires 2 separation of the product in the stream, and would require a large purge gas stream if applied on an industrial scale

Method used

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preparation example Construction

[0016] A combined preparation and isolation process is to be understood as a process in which one or more components involved in the isolation process are also components involved in the production process. In the process according to the invention, the components used as sweeping components in the separation process are used as feed components in the production process.

[0017] A gas separation process is understood to mean that during this separation process at least a part of the first component, the mixture of components and the sweeping component is in the gaseous state during the separation process. More preferably at least 50 wt% of the first component, the mixture of components and the purge component are in the gaseous state, preferably at least 80 wt% and even more preferably in the range of 90-100 wt% are in the gaseous state. Most preferably all components are completely gaseous during the separation process. Components which are normally liquid at ambient temper...

Embodiment 2

[0133] In an example of the process of the invention, the production of ethylene oxide is carried out as described above for Example 1, except that the bleed stream is further separated in the gas separation unit of the invention by passing argon through a porous The separator diffuses into the carbon dioxide stream to remove argon.

[0134] Figure 3 depicts this approach.

[0135] This approach was simulated using a computer model. In this computer model, gas separation is performed at a temperature of about 35°C and a pressure of about 1 bar; the length of the gas separator is 1.53 m and the thickness of the porous partition is 1 mm; and the total surface area of ​​the pores in the porous partition Relative to the gas volume is 100m 2 / m 3 . The carbon dioxide stream (pure, 450 kmol / h) leaving the process of comparative example 1 is now fed countercurrently into the bleed stream containing argon. The result is a new bleed stream (4) and a new recycle stream (2) with a l...

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Abstract

Integrated preparation and separation process comprising a preparation process wherein a byproduct is produced; and a gas separation process wherein a first component is separated from a mixture of components by diffusion of the first component through a porous partition into a stream of sweeping component; wherein the byproduct produced in the preparation process is subsequently used as the sweeping component in the separation process, and an industrial set-up for use in such a process.

Description

technical field [0001] The present invention relates to combined preparation and isolation methods. Background technique [0002] In the chemical industry, various separation techniques are available to separate two or more components within a gaseous mixture. Examples of such separation techniques are known in the art and can be found, for example, in Chapter 5.7 of "Process Design Principles" by W. Seider et al., published by John Wiley & Sons, inc. 1999. [0003] The most commonly used technique is distillation. But the disadvantage of the distillation technique is that it consumes a lot of energy to separate those compounds within the mixture. [0004] Another technique that can be used is membrane separation using gas permeation. Here the gas mixture is compressed to high pressure and brought into contact with a non-porous membrane. The permeate passes through the membrane and is discharged at low pressure, while the retentate does not pass through the membrane and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D53/92C07C7/144C07D301/32
CPCB01D53/229C07C7/144C07C11/02B01D53/22B01D53/92C07D301/32
Inventor A·布伊杰斯G·J·哈姆森D·F·米尔德A·P·韦斯特林克
Owner SHELL INT RES MAATSCHAPPIJ BV