초록 ▼

A process is provided for recovering oxygen-rich gas by enriching gaseous oxygen contained in crude gas by a single-tank PSA process which utilizes a single adsorption tower loaded with an adsorbent. A cycle is repeated including introducing crude gas into the adsorption tower, desorbing unnecessary

A process is provided for recovering oxygen-rich gas by enriching gaseous oxygen contained in crude gas by a single-tank PSA process which utilizes a single adsorption tower loaded with an adsorbent. A cycle is repeated including introducing crude gas into the adsorption tower, desorbing unnecessary components from the adsorbent, introducing washing gas into the adsorption tower for discharging the remaining gas from the adsorption tower, and raising the internal pressure of the adsorption tower. The desorbing includes recovering semi-enriched oxygen gas existing in the adsorption tower after finishing of the adsorption for retention in a recovery tank. The introduction of washing gas includes introducing part of the semi-enriched oxygen gas existing in the recovery tank into the adsorption tower as the washing gas. Raising the internal pressure includes introducing the rest of the semi-enriched oxygen gas retained in the recovery tank into the adsorption tower.

대표청구항 ▼

A process is provided for recovering oxygen-rich gas by enriching gaseous oxygen contained in crude gas by a single-tank PSA process which utilizes a single adsorption tower loaded with an adsorbent. A cycle is repeated including introducing crude gas into the adsorption tower, desorbing unnecessary

A process is provided for recovering oxygen-rich gas by enriching gaseous oxygen contained in crude gas by a single-tank PSA process which utilizes a single adsorption tower loaded with an adsorbent. A cycle is repeated including introducing crude gas into the adsorption tower, desorbing unnecessary components from the adsorbent, introducing washing gas into the adsorption tower for discharging the remaining gas from the adsorption tower, and raising the internal pressure of the adsorption tower. The desorbing includes recovering semi-enriched oxygen gas existing in the adsorption tower after finishing of the adsorption for retention in a recovery tank. The introduction of washing gas includes introducing part of the semi-enriched oxygen gas existing in the recovery tank into the adsorption tower as the washing gas. Raising the internal pressure includes introducing the rest of the semi-enriched oxygen gas retained in the recovery tank into the adsorption tower. hylenically unsaturated monomer is selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, fumaric acid, maleic acid, and anhydrides of such acids; acid substituted (meth)acrylates, acid substituted (meth)acrylamides; their basic salts; and basic substituted (meth)acrylates and (meth)acrylamides; and mixtures thereof. 6. The method according to claim 5, wherein said organic hygroscopic material further comprises as polymerized units, from 0 to 50 weight % of at least one co-monomer selected from the group consisting of (C1-C8) alkyl (meth)acrylates, based on the weight of said organic hygroscopic material, and wherein said acidic or basic monoethylenically unsaturated monomer is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, anhydrides of such acids; basic salts of such monomers and mixtures thereof. 7. The method as claimed in claim 6, wherein said organic hygroscopic material is a homopolymer of acrylic acid, a copolymer of acrylic acid comprising as polymerized units at least 50 weight % acid, based on weight of said copolymer, or a basic salt thereof.