SU1187852A1 - Method of cleaning air from vapour of organic substance - Google Patents

Abstract

A method for cleaning air from organic vapors by passing it through a sorbent, characterized in that, in order to increase the degree of air purification from monoethanol ethylene diamine vapor, a copper form of sulfonic cation exchanger based on a styrene copolymer and divinyl benzene containing nitro groups is used as a sorbent.

Description

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The invention relates to sorption air purification and can be used in industrial facilities in which air is cleaned in enclosed sealed rooms used for the production of highly pure substances.

The aim of the invention is to increase the degree of air purification from paoo monoethanol ethylene diamine (MEEDA

Example 1. Air with a CO2 concentration of 0.5–6.% Is fed at a speed of 0.8 m / s to an absorber with a diameter of 100 mm with a Levin nozzle with a height of 1500 mm. Irrigation density in the absorber with a solution of MEED 0.3 .h. The concentration of MEEDA in the irrigated solution is 14 wt.%. The air is purified in an absorber of C02 to a content of the latter of 0.2% by volume. CO content in MEEDA at the exit of the absorber 15 l / l. The content of MEEDA vapor at the outlet from the absorber is 11 mg / m.

Sulfur cation exchanger based on a copolymer of styrene and divinylbenzene KRS-15 T-100-N in the amount of 241 g is loaded into the cassette filter. The content of sulfo groups in the cationite is 2.0 mg eq / g, nitro groups 2.0 mg eq / copper 70 mg / g . The sorption capacity of the cation exchanger according to DEDA is 6.3 wt.%.

The filter has 544 hours of operation. The amount of air passed through the filter from the absorber is 690 m. MEED concentration in the air at the outlet

from the filter 2.6 mg / m3. The degree of air purification from MEEDA vapors with a cation exchanger based on a copolymer of styrene and divinylbenzene in copper form with sulfo nitro groups is 0.81.

And p m ime R 2. Air with a CO concentration of 0.8 ° C,% is fed into the specified absorber at a speed of 0.5 m / s. Density of irrigation in aosorber with solution of MEED 1,5. The concentration of MEEDA in the irrigated solution is 16 wt.%. The air is purified in an absorber of C02 to a content of the latter of 0.3 vol.%. The content of COj in MEEDA. When leaving the absorber 17 l / l. The vapor content of MEEDA at the outlet of the absorber is 25 mg / m.

Sulfur cation exchanger based on a copolymer of styrene and divinylbenzene KRS-15t-100-N in a copper form in the amount of 241 g is loaded into a cassette filter. The content of sulfo groups in the cationite is 3.6 mg eq / g, nitro groups 4.0 mg eq / g, copper 80 mg / g. Sorption on the capacity of cation exchanger 9.6 wt. / MEEDA.

The filter runs for 520 hours. The amount of air passed through the filter from the absorber is 670 m. The MEEDA concentration in the air at the filter outlet is 2.8 mg / m. The degree of air purification from vapors MEEDA cation exchanger based on styrochol copolymer. and divinylbenzene in the copper form with sulfo and nitro groups is 0.87.

Claims (1)

METHOD FOR CLEANING AIR FROM VAPORS OF ORGANIC MATTER by passing it through a sorbent, characterized in that, in order to increase the degree of purification of air from monoethanol ethylene diamine vapors, a copper form of sulfocationionite based on a styrene-divinylbenzene copolymer containing nitro groups is used as the sorbent. (L oo • h 00 slo