method for pervaporation and vapor permeation separation of gas-liquid mixtures and liquid membrane sieve mixtures sapo-34

摘要

The present invention discloses a method for the pervaporation and vapor permeation separation of a gas-liquid mixture, or a liquid mixture by a sapo-34 molecular sieve membrane, comprising: 1) mixing an aluminum source; tetraethyl ammonium hydroxide, water, a source thereof, and a source of p, and subjecting the resultant to hydrothermal crystallization, then centrifugation, washing and drying, to obtain sapo-34 molecular sieve seeds; 2) coating the frog-34 molecular sieve seeds on the inner surface of a porous support tube; 3) synthesis of a tube of the sapo-34 molecular sieve membrane; 4) calcination of the sapo-34 molecular sieve membrane tube obtained to obtain a sapo-34 molecular sieve membrane; 5) using the sapo-34 molecular sieve membrane obtained from step 4) to perform separation of a gas-liquid mixture or a liquid mixture via a pervaporation separation process or vapor permeation separation process. The invention has the advantages of very high methanol selectivity and permeation flow, and provides an efficient and energy saving separation mode via pervaporation or vapor permeation separation.