METHOD OF PRODUCING 2-(2-TRET.BUTYLAMINO-ETHOXY)-ETHANOL (TRET.BUTYLAMINODIGLYCOL, TBADG) Russian patent published in 2016 - IPC C07C213/02 C07C217/08 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing 2-(2-tret.-butylamino-ethoxy)-ethanol (tret.-butylaminodiglycol). Product is used, for example, gas scrubbing, for the selective separation of acidic gases, for example H₂S from gas streams which comprise mixtures of one or more acidic gases and CO₂. Method of producing 2-(2-tret.-butylamino-ethoxy)-ethanol is realised by reacting diethylene glycol with tret.-butylamine in molar ratio tret.-butylamine and diethylene glycol from 1 to 4, in presence of hydrogen and catalyst containing copper oxide or aluminium oxide at temperature of 160-220 °C and absolute pressure from 1 to 200 bar to degree of conversion of diethylene glycol in range from 20 to 80. Process can be carried out in gas phase in molar ratio of hydrogen to diethylene glycol from 40 to 220 or in mixed gas-liquid phase at in molar ratio of hydrogen to diethylene glycol from 5 to 50. Catalytically active mass of catalyst before its reduction with hydrogen contains from 20 to 75 wt% of aluminium oxide (Al₂O₃) and from 20 to 75 wt% oxygen-containing compounds of copper, designed for CuO. Preferably catalytically active mass of catalyst before its reduction with hydrogen contains from 25 to 65 wt% of aluminium oxide (Al₂O₃) and from 30 to 70 wt% oxygen-containing compounds of copper, designed for CuO. Reaction can be performed isothermally, with temperature deviation of not more than ±8^°C. Catalyst can be placed in a reactor in form of a fixed bed. Catalyst can have micropore volume < 0.5 cm³/g. In catalyst at normalisation pores can have size of > 0 to ≤ 20 nm, ≤ 30 % of pores have size of up to 5 nm and more than 70% of pores have a size of > 5 to 20. Unreacted diethylene glycol and/or tret.-butylamine is returned to reaction.

EFFECT: method enables to obtain products with high conversion, selectivity and output.

13 cl, 3 tbl, 16 ex