The granular adsorbent-based fluorocarbon

 

(57) Abstract:

The invention relates to the manufacture of the adsorbent and can be used in gas chromatography in gas chromatography analysis of complex organic mixtures. The proposed adsorbent contains PTFE and fluorocarbon in the following ratio, wt.%: the fluorocarbon 80 - 90; PTFE 10 - 20. This combination of components allows to obtain an adsorbent having a high strength, thermal resistance and high durability. table 1.

The invention relates to the manufacture of adsorbents and can be used in gas chromatography in gas chromatography analysis of complex mixtures of substances.

Known polymeric adsorbent "Polisorb" (a copolymer of styrene and divinylbenzene) for molecular chromatography [1]

However, this adsorbent has a polarity, the lack of homogeneity of the surface and low temperature resistance (maximum operating temperature of 200-250about(C) that does not effectively separate the components of complex mixtures of substances of different nature and volatility.

Known porous sorbent based carbon material (polysaccharides) and polymer [2] as performanceline resin, karbamidoformaldegidnye resin and/or epoxy resin.

The disadvantages of this adsorbent is low and the strength of granules and low chemical inertness and uniformity of the surface due to the fact that it used a highly polar carbon materials polysaccharides.

Closest to the invention is a granular adsorbent-based fluorocarbon [3] as fluorocarbon is used fluorinated graphite. This adsorbent has high heat resistance and high polamolu.

The disadvantage of this adsorbent is its low mechanical strength, which even with high heat resistance and high polamolu does not provide efficient separation of mixtures of substances.

The aim of the invention is to increase the efficiency of the separation of complex mixtures of substances by improving the operational characteristics of the adsorbent.

The invention consists in the following.

The proposed technical solution, the combination of a fluorocarbon with PTFE in a certain ratio, we can obtain the adsorbent with high polamolu, high strength and thermal resistance is the quiet provide a high efficiency of separation of complex mixtures of substances during operation of the adsorbent.

As the fluorocarbon in the adsorbent used fluorinated carbon black, cokes, fibrous fluorinated carbon materials, fluorinated graphite, etc.

Fluoridation spend working mixture containing 5-10% fluorinating gas and 90-95% inert gas 470-520aboutC.

As a granulating agent used polymers porpoising ethylene fluoropolymers:

Teflon 4D (polytetrafluoroethylene) formula [-CF2-CF2-]n;

the ftorlona 32L (copolymer of triptoreline with vinylidenefluoride)

grades b and H of the formula [-CF2-CFCl-CH2-CF2-]n;

Teflon DPT (polytetrafluoroethylene) formula [-CF2-CF2-]n.

The following is an example of the prototype and sample production of granular adsorbent-based fluorocarbon.

P R I m e R 1 (prototype). Graphite Belogorsky (TO-25-172-75) was ferromoly 400aboutWith gaseous fluorine. The resulting extruded fluorocarbon to the grain size of 0.25-0.3 mm

P R I m m e R 2. Fibrous carbon material with the temperature getting 2500about(TS16-88 ILEA. 349738.004 TU) was ferromoly at 470aboutWith, then dispersively to particle size less than 100 microns.

the respectively, mixed in ethyl acetate, was pravalivai at room temperature until the consistency of thick dough, the mixture is rubbed through a sieve with mesh size of 0.5 mm is Obtained pellets were heated at 150aboutC for 1.5-2 h, and performed the screening.

P R I m e R 3. 80 wt. the fluorocarbon in example 1 and 20 wt. ftorlona 32 LF were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 4. 90 wt. the fluorocarbon in example 1 and 10 wt. ftorlona 32 LF were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 5. 85 the fluorocarbon in example 1 and 15 wt. PTFE LV 32 (OST 6-05-432-78) were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 6. 85 the fluorocarbon in example 1 and 15 wt. PTFE 4D (GOST 14906-77) were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 7. Carbon black (TU-1-1591-87) was ferromoly at 490aboutC. the resulting fluorocarbon and ftorlona 32LN, taken in the ratio of 85 and 15 wt. respectively, were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 8. The calcined coke (TO-101698-80) was ferromoly at 520aboutC. the resulting fluorocarbon and ftorlona 32 LN, taken in the ratio of 85 and 15 wt. respectively, were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 9. Graphite botoi 15 wt. respectively, were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 10. 85 the fluorocarbon in example 1 and 15 wt. PTFE-DPT (TL6-05-372-77), were mixed in ethyl acetate. Further according to the example 1.

P R I m e R 11. The technology of manufacture of the adsorbent of example 1 in a ratio of components, wt. the fluorocarbon 75; ftorlona 32LN 25.

P R I m e R 12. The technology of manufacture of the adsorbent of example 1 in a ratio of components, wt. the fluorocarbon 95; ftorlona 32 LF 5.

Gas chromatographic characteristics of the analog prototype and the proposed adsorbents (example 2-10) are presented in the table.

The gas chromatographic analysis of the characteristics of known (prototype) and the proposed adsorbents (see table) showed that the introduction of the polymer increases the strength of the granules of the adsorbent compared to the prototype, and therefore increases the efficiency of operation in gas chromatography, as evidenced by indicators of cycles of heating-cooling and service life. A decrease in the specific surface area, thermal stability compared with the prototype does not affect the deterioration of the chromatographic characteristics of the adsorbent, as evidenced by the values of the ionic characteristics of the adsorbent somewhat reduced.

The GRANULAR ADSORBENT-BASED FLUOROCARBON, characterized in that it further contains polytetrafluoroethylene in the following ratio, wt.

The fluorocarbon 80 90

PTFE 10 20

 

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