ADSORBENT AND METHOD FOR SEPARATING METHANOL AND OXYGENATES Russian patent published in 2021 - IPC B01J20/18 B01D53/04 B01D53/47 C10L3/10 

FIELD: adsorbents.

SUBSTANCE: invention relates to an adsorbent for separation and purification methods, designed to remove methanol and oxygenates from gas and liquid process streams. The adsorbent is a mono-, bi- or tricationic form of low-silica faujasite (LSX) containing alkali or alkaline earth metals. The LSX material has a silicon to aluminum ratio in the range of about 0.9 to about 1.15 and an ion exchange rate for each of the alkali or alkaline earth metals in the range of about 10 to about 99.8% (eq.). Gaseous process streams include natural gas, individual hydrocarbons or vaporized carboxylic acid alkyl esters or methyl tert-alkyl ethers and mixtures thereof with hydrocarbons. Liquid process streams include liquefied natural gas (LNG), liquefied petroleum gas (LPG), gas condensate (GC), selected C3-C5 hydrocarbons and monomers, alkyl esters of carboxylic acids, including methyl acetate, methyl-, ethyl-, butyl acrylates and methacrylates, methyl tert-alkyl ethers, including methyl tert-butyl ether (MTBE) and methyl tert-amyl ether (TAME).

EFFECT: increase in adsorption capacity and selectivity in relation to the extraction of methanol and oxygenates from gas and liquid process streams while ensuring the required degree of purity of separation products.

15 cl, 2dwg, 6 tbl, 21 ex