METHOD OF PRODUCING COMPOSITE FOR ACID GAS SEPARATION

摘要

An art is provided for preparing a coating liquid for formation of an acid gas separation facilitated transport membrane, the coating liquid containing a hydrophilic compound, an acid gas carrier and water, using as a porous support a laminated membrane between a hydrophobic porous membrane and an auxiliary support membrane, coating onto a surface of the hydrophobic porous membrane of the laminated membrane the coating liquid for formation at a liquid membrane thickness of 0.3 mm or more and 1.0 mm or less, and drying the coated liquid membrane to form a first acid gas separation facilitated transport membrane, and further coating the coating liquid for formation of the acid gas separation facilitated transport membrane onto the previously formed acid gas separation facilitated transport membrane, and drying the coated liquid membrane to form a next acid gas separation facilitated transport membrane.

主权项

1. A method of producing a composite for acid gas separation, the composite provided with an acid gas separation facilitated transport membrane having a function of separating an acid gas in a raw material gas on a porous support, comprising:
a coating liquid preparation step for preparing a coating liquid for formation of the acid gas facilitated transport membrane, the coating liquid containing a hydrophilic compound, an acid gas carrier and water; an initial layer formation step for forming a first acid gas separation facilitated transport membrane by using as the porous support a laminated membrane between a hydrophobic porous membrane and an auxiliary support membrane, coating on a surface of the hydrophobic porous membrane of the laminated membrane the coating liquid for formation at a liquid membrane thickness of 0.3 mm or more and 1.0 mm or less, and drying the coated liquid membrane; and a next layer formation step one or more times for forming a next acid gas separation facilitated transport membrane by further coating on the previously formed acid gas separation facilitated transport membrane the coating liquid for formation of the acid gas separation facilitated transport membrane, and drying the coated liquid membrane.