DE1281400B - Process for the continuous separation of gases according to the principle of gas elution chromatography - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

German class:

Number:
File number:
Registration date:
Display day:

BOId

B 01 j; A 62 c
GOIn

12 e - 3/02

12 g-1/01

421-4 / 16

P 12 81 400.5-43 (P 20395)

March 26, 1958

October 31, 1968

As is well known, elution chromatography is known due to its particular suitability for separating chemically very similar compounds. the The separation effect is orders of magnitude better than with rectification methods; also allows the Gas-solution partition chromatography through appropriate choice of the stationary liquid phase an adaptation to special separation problems, which are z. B. enables paraffins and olefins to be the same Separate boiling point from each other. So far, the method could only be carried out discontinuously become and remained limited to analytical separations.

It has surprisingly been found that it is possible to use the principle of elution chromatography to use for a continuous process for the separation of gases by a chromatograph active material - ■ for example di-n-butyl phthalate on fireclay flour (sterchamol 0.3 to 0.4 mm grain size), 40/100 parts by weight - hereinafter referred to as material for short, and one Gas phase are moved in a column in countercurrent to each other at a defined speed. the The gas phase consists of the mixture to be separated, which is diluted with carrier gas. All gas components move in countercurrent to the material, but through each component with its own material Distribution or adsorption isotherms determined speed.

It has been found that the speed of the material and the flow rate of the Gas phase must be coordinated so that the two components to be separated one moves faster and the other slower than the material moves in the opposite direction emotional. In this case, the gas flows quantitatively with the greater migration speed the carrier gas to the top of the column, while the gas with the lower migration speed is quantitatively transported to the base of the column, where it is detached from the material in a second stage must be, ζ. B. by a carrier gas flow at a higher gas phase velocity.

Setting the material speed to the mean value of the migration speeds of these two gases is particularly suitable for the continuous separation of two gases. The components separated from one another are obtained in a mixture with carrier gas, which is therefore to be selected so that the eluted compounds can be separated from the carrier gas by known methods. Hydrogen, a process for the continuous separation of
Gases according to the principle of
Gas elution chromatography

Applicant:

Dr. phil. Helmut Pichler,

7500 Karlsruhe, Kaiserstr. 12th

Named as inventor:

Dr. phil. Helmut Pichler,

Dr. Hans Schulz, 7500 Karlsruhe

Helium, nitrogen, air, carbon dioxide and others. be used. The material is after rinsing the slower moving compounds are regenerated and circulated.

The method is applicable to the separation of two gases from one another or to the separation the component with the lowest or the highest migration speed from a multicomponent mixture or the breakdown of a multi-component mixture into two fractions, in which the individual Components are now only contained in one of the two fractions. Repeated application the principle allows all components of the mixture to be separated from one another. Temperature and Pressure must be maintained in such a way that the compounds to be separated are in gaseous form. as inert carrier material and the liquid phase are known from partition chromatography Fabrics used. The method is used particularly for the continuous separation of gases, which after so far known methods can only be separated from one another with difficulty or not at all.

Embodiment

Mixture to be separated:

η-butane (bp. -0.5 ⁰ C) 50 volume percent,
trans-butene (. b.p. +0.9 ⁰ C) 50 volume percent;

Carrier gas: nitrogen;

Inert carrier material: fireclay powder (Sterchamol), grain size 0.3 to 0.4 mm;

Liquid phase: di-n-butyl phthalate;

Grams of liquid phase per gram of carrier material: 40/100;

Material speed: 12 cm / min;

Flow: 42 cm ³ per minute and per cm ^{2 of} column cross-section;

809 629/1429

Volume of mixture applied per volume of carrier gas: 0.2.

Analyzes of gas samples show that n-butane and trans-butene are different from each other under these conditions continuously quantitatively separated.

Claims (2)

Patent claims: 1. Process for the continuous separation of gas mixtures containing a carrier gas according to the principle of gas elution chromatography, characterized in that Column material is moved against the gas flow at a speed between the Migration speeds of the gas components to be separated lies. 2. The method according to claim 1, characterized in that the speed of the column material equal to the mean value of the migration speeds two gas components to be separated from each other. a gas mixture is. Considered publications: U.S. Patent No. 2,635,706; Uli mann, Encyclopedia of Techn. Chemistry,
Vol. 1, 1951, pp. 356 and 357; Journal "Erdöl u. Coal", 9 (1956), p. 593
to 597; VDI-Zeitschrift, 98, 1956, No. 20 (July 11th),
P. 1056.