Process for the dehydration of gases using composite permeable membranes, preferably hollow fiber composite membranes comprised of a porous support coated with an ultrathin layer of a defined sulfonated polysulfone or sulfonated polyether ketone. The processes also contemplate the use of a sweep or purge gas on the water-enriched permeate side of the composite membrane to increase the efficiency of the dehydration process.

Claims

56 · 1 independent · depth 7

56 granted claims

›1.independentA gas dehydration process comprising contacting a water vapor-containing feed gas with one side of a composite membrane comprising a porous support an…+55

›2.↳ 1A gas dehydration process as claimed in claim 1 wherein said separation barrier comprises a sulfonated aromatic polysulfone having in the chain of the…d2+14

›21.↳ 2A gas dehydration process as claimed in claim 2 wherein said sulfonated polysulfone contains in the chain of the polymer molecule the repeat unit: ##S…d3

›22.↳ 2A gas dehydration process as claimed in claim 2 wherein said sulfonated polysulfone contains in the chain of the polymer molecule the repeat unit: ##S…d3

›23.↳ 2A gas dehydration process as claimed in claim 2 wherein said sulfonated polysulfone contains in the chain of the polymer molecule the repeat unit: ##S…d3+9

›24.↳ 23A gas dehydration process as claimed in claim 23 wherein said porous support is a hollow fiber.d4+5

›25.↳ 24A gas dehydration process as claimed in claim 24 wherein the separation barrier is sulfonated polysulfone having a polymer average molecular weight fr…d5+3

›29.↳ 24A gas dehydration process as claimed in claim 24, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in…d5

›30.↳ 23A gas dehydration process as claimed in claim 23 wherein the feed gas comprises water vapor-containing air stream.d4+1

›32.↳ 23A gas dehydration process as claimed in claim 23, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in…d4

›33.↳ 2A gas dehydration process as claimed in claim 2 wherein said porous support is a hollow fiber.d3

›34.↳ 2A gas dehydration process as claimed in claim 2, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in …d3

›3.↳ 1multiple · 1, 2A gas dehydration process as claimed in claim 2 wherein said separation barrier comprises a sulfonated aromatic polysulfone having in the chain of the…d2+17

›4.↳ 3A gas dehydration process as claimed in claim 3 wherein said porous support is a hollow fiber.d3+9

›5.↳ 4A gas dehydration process as claimed in claim 4 wherein the separation barrier is sulfonated aromatic polysulfone having a polymer average molecular w…d4+5

›6.↳ 5A gas dehydration process as claimed in claim 5 wherein R and R' are methyl.d5+1

›11.↳ 5A gas dehydration process as claimed in claim 5 wherein the ultrathin layer of the separation barrier of the composite membrane comprises a thin coati…d5+1

›13.↳ 5A gas dehydration process as claimed in claim 5, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in …d5

›8.↳ 4A gas dehydration process as claimed in claim 4 wherein R and R' are methyl.d4+1

›10.↳ 4A gas dehydration process as claimed in claim 4, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in …d4

›14.↳ 3A gas dehydration process as claimed in claim 3 wherein the feed gas comprises water vapor-containing air stream.d3+3

›18.↳ 3A gas dehydration process as claimed in claim 3 wherein R and R' are methyl.d3+1

›20.↳ 3A gas dehydration process as claimed in claim 3, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in …d3

›35.↳ 1A gas dehydration process as claimed in claim 1 wherein said separation barrier comprises a sulfonated aromatic polyether ketone having in the chain o…d2+12

›36.↳ 35A gas dehydration process as claimed in claim 35 wherein said sulfonated polyether ketone contains in the chain of the polymer molecule the repeat uni…d3+9

›37.↳ 36A gas dehydration process as claimed in claim 36 wherein said porous support is a hollow fiber.d4+5

›38.↳ 37A gas dehydration process as claimed in claim 37 wherein the separation barrier is sulfonated polyether ketone having a polymer average molecular weig…d5+3

›42.↳ 37A gas dehydration process as claimed in claim 37, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in…d5

›43.↳ 36A gas dehydration process as claimed in claim 36 wherein the feed gas comprises water vapor-containing air.d4+1

›45.↳ 36A gas dehydration process as claimed in claim 36, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in…d4

›46.↳ 35A gas dehydration process as claimed in claim 35 wherein said porous support is a hollow fiber.d3

›47.↳ 35A gas dehydration process as claimed in claim 35, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in…d3

›48.↳ 1A gas dehydration process as claimed in claim 1 wherein said porous support is a hollow fiber.d2+5

›49.↳ 48A gas dehydration process as claimed in claim 48 wherein the separation barrier is sulfonated aromatic polymer having an average molecular weight from…d3+3

›53.↳ 48A gas dehydration process as claimed in claim 48, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in…d3

›54.↳ 1A gas dehydration process as claimed in claim 1 wherein the feed gas comprises water vapor-containing air stream.d2+1

›56.↳ 1A gas dehydration process as claimed in claim 1, wherein a sweep fluid having a lower water vapor concentration than the water vapor concentration in …d2

Classifications

3 codes

USPC · US Patent Classification

550/16550/68551/58

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