METHOD OF CALORIMETRIC DETERMINATION OF PERSORPTION OF SUBSTANCES FROM SOLUTIONS Russian patent published in 2010 - IPC G01K17/08 B01D15/00 

FIELD: chemistry.

SUBSTANCE: invention refers to chemistry of dispersed systems and surface and may be used for obtainment of individual substances sorption isotherms from solutions using calorimetre with isothermic cover. Method of calorimetric determination of persorption of substances from solutions is characterised by use of multi- ampoule calorimetre of alternating temperature with isothermic cover and automated circuit of measurement of temperature and thermal calibration with calorimetric cell center of which is provided with cylindrical cup with tightly inserted in it calorimetric vessel with removable cassette for twelve ampoules, and it consists in the following: twelve sorbent charges are weighed and sealed in glass ampoules, ampoules are secured in cassette, cassette is installed in calorimetric vessel, then solution of sorbing agent is put into calorimetric vessel, then calorimetric vessel is hermetically closed and installed in calorimetric cell, thermostat control is performed under preset temperature till achievement of heat balance, then automated circuit of measurement of temperature and thermal calibration of calorimetre of alternating temperature is engaged for continuous recording of temperature in calorimetric cell, thermal calibration of calorimetre is performed, ampoules with sorbent are broken one by one mixing each portion of sorbent with solution of sorbent, at that temperature change during chemical reaction is automatically recorded, next portion of sorbent is added after temperature equalisation in calorimetric cell, after temperature equalisation in calorimetric cell as a result of absorption of sorbent from the twelfth ampoule and completion of calorimetric experiment, curve of calorimetric experiment temperature change is constructed, it is used for determination of temperature change in calorimetric vessel upon calibration and upon adding of each portion of sorbent using particular algorithm of measurement results processing, heat of persorption reaction(Q_c) for each portion of sorbent is calculated by formula.

EFFECT: development of method of calorimetric determination of persorption of substances from solutions which provides simultaneous obtainment of energy characteristics of substance absorption, type of sorption interaction, time of persorption balance achievement and limit sorption capacities of sorbent of this substance with high accuracy and selectivity.

3 dwg, 1 ex