Membrane gas extractor

Claim 2

The combination of claim 1, each of said screen assemblies comprising a central framing member adapted to snugly receive a screen, said framing member in said screen having substantially equal thicknesses, said screen assemblies further comprising upper and lower hold-down plates, means to secure said hold-down plates to said framing member, and said hold-down plates being slightly larger than said framing member to grip the edges of said screen therebetween.

Claim 3

The combination of claim 3, said framing member and said hold-down plates consisting of brass, and said screen consisting of stainless steel having a wire size of 0.0075 and a mesh size of 60.

Claim 4

The combination of claim 3, said first and second screen assemblies being of identical construction and disposed in said separator cell in upside-down relationship to each other.

Claim 5

The combination of claim 5, said carrier gas flow means comprising registering passageways formed in said upper, middle and lower members and registering passageways formed in said screen assemblies, whereby said carrier gas flows through portions of said passageways in one of said upper and lower members, thRough said passageway in said first screen assembly through said screen in said first screen assembly from end to end thereof, through a passageway in the opposite end of said framing member, through the portions of said passageway in said middle member, through the similar structure in said second screen assembly, and out said passageway in the other of said upper and lower main members.

Claim 6

The combination of claim 1, said screen assemblies and said membranes being of elongated configuration, said means to flow said gas containing liquid comprising at least two elongated slots formed in each of said upper, middle and lower members, said slots being positioned to the opposite sides of said elongated membranes, whereby said liquid supplied to one side of said cell flows into said elongated slot and across the entire operative face of the associated membrane and then out the other slot.

Claim 7

In apparatus for separating gas out of a liquid in which the gas is dissolved by passing the gas laden liquid over a membrane to accomplish such separation, the improvement comprising making the membrane of a coherent film of unsintered polytetrafluoroethylene, whereby the gas passes through the porous film and the liquid is repelled by the film, said apparatus comprising a pair of elongated members, screen means between said members, an elongated membrane to each side of said screen means, means to flow liquid containing dissolved gases to one elongated side of each of said membranes and then across the outsides of said membranes and then away from said membranes, and means to flow carrier gas through said screen means.