An independent blood filter device depends on flow geometry to deliver blood serum or plasma free of detrimental levels of hemoglobin. It depends critically on an upstream flow rate or pressure differential limiting control element or device that limits the rate of change of pressure differential across the filter element. Pre-evacuated versions can be used to simultaneously draw blood from a living being and provide pressure differential across the filter element between an evacuated collector and a supply end open to atmosphere. A unit pressurized by hand motion employs the external shape of a partially filled blood collection tube as a piston to produce pressure in advance of the control element or device to create the pressure differential across the filter element to a collector vented to atmosphere. The control element or device is disclosed in numerous forms, including specially sized flow constrictions and compliant arrangements.

Provided is an alkali-resistant porous glass member suitable as a gas sensor element. A porous glass member contains, in terms of % by mass, over 0% ZrO.sub.2+TiO.sub.2+Al.sub.2O.sub.3+BeO+Cr.sub.2O.sub.3+Ga.sub.2O.sub.3+CeO.sub.2 and has a light transmittance of over 1% at any one of wavelengths from 200 to 2600 nm at a thickness of 0.5 mm.

A method of separation of predetermined gas from the mixture of gases or an atmosphere, wherein said method of separation of predetermined gas from a mixture of gases or an atmosphere comprises passing a mixture of gases or an atmosphere through the reinforced mass selective fluid bandpass filter (8). The reinforced mass selective fluid bandpass filter comprises the mass selective fluid bandpass filter element (9) permanently affixed to the sintered metal load bearing structure (14). The mass selective fluid bandpass filter element consists of quartz glass, of either natural or manmade origin. This method provides removing predetermined gas from the group consisting of: .sup.1H.sub.2, .sup.1H.sup.2H, .sup.2H.sub.2, .sup.1H.sup.3H, .sup.2H.sup.3H, .sup.3H.sub.2, .sup.1H.sub.2O, .sup.1H.sup.2HO, .sup.2H.sub.2O.sub., .sup.1H.sup.3HO, .sup.2H.sup.3HO, .sup.3H.sub.2O, O.sub.2, O.sub.3, .sup.12CO.sub.2, .sup.13CO.sub.2, .sup.14CO.sub.2, .sup.4 CO, N.sub.2, NO, NO.sub.2, NO.sub.x, SiO.sub.2, FeO, Fe.sub.2O.sub.3, SiF.sub.4, HF, NH.sub.3, SO.sub.2, SO.sub.3, H.sub.2SO.sub.4, H.sub.2S, .sup.35Cl.sub.2, .sup.37Cl.sub.2, F.sub.2, Al.sub.2O.sub.3, CaO, MnO, P.sub.2O.sub.5, phenols, volatile organic compounds, and peroxyacyl nitrates.

A method of separation of predetermined gas from the mixture of gases or an atmosphere, wherein said method of separation of predetermined gas from a mixture of gases or an atmosphere comprises passing a mixture of gases or an atmosphere through the reinforced mass selective fluid bandpass filter (8). The reinforced mass selective fluid bandpass filter comprises the mass selective fluid bandpass filter element (9) permanently affixed to the sintered metal load bearing structure (14). The mass selective fluid bandpass filter element consists of quartz glass, of either natural or manmade origin. This method provides removing predetermined gas from the group consisting of: .sup.1H.sub.2, .sup.1H.sup.2H, .sup.2H.sub.2, .sup.1H.sup.3H, .sup.2H.sup.3H, .sup.3H.sub.2, .sup.1H.sub.2O, .sup.1H.sup.2HO, .sup.2H.sub.2O.sub., .sup.1H.sup.3HO, .sup.2H.sup.3HO, .sup.3H.sub.2O, O.sub.2, O.sub.3, .sup.12CO.sub.2, .sup.13CO.sub.2, .sup.14CO.sub.2, .sup.4 CO, N.sub.2, NO, NO.sub.2, NO.sub.x, SiO.sub.2, FeO, Fe.sub.2O.sub.3, SiF.sub.4, HF, NH.sub.3, SO.sub.2, SO.sub.3, H.sub.2SO.sub.4, H.sub.2S, .sup.35Cl.sub.2, .sup.37Cl.sub.2, F.sub.2, Al.sub.2O.sub.3, CaO, MnO, P.sub.2O.sub.5, phenols, volatile organic compounds, and peroxyacyl nitrates.

This disclosure provides, among other things, a filtration device comprising an open bottomed multi-well plate, a planar spacer that comprises apertures, and a porous capillary membrane. In the device, the planar spacer is sandwiched between the multi-well plate and the porous capillary membrane and the planar spacer is bonded to both the multi-well plate and the porous capillary membrane via an adhesive. Kits and methods of making the device are also provide.

A reactor for converting hydrogen sulfide into hydrogen gas and sulfur.

A reactor for converting hydrogen sulfide into hydrogen gas and sulfur.

Provided is a filter membrane modifying method based on metallic oxide particles, relating to the field of membrane method water treatment. The method aims to resolve the problems existing in a common organic membrane or inorganic membrane that an intercepted substance is easily adsorbed on the surface of the membrane and in membrane holes during use so that the membrane holes are clogged, a membrane body is polluted, flux attenuation is quick, the service life of the membrane is shortened, and the backwashing efficiency is low. The method comprises: preparing a solution containing metallic oxide particles, then filtering, by using a filter membrane, the solution containing metallic oxide particles, and forming a metallic oxide particle cover layer on the surface of the filter membrane, i.e., completing the filter membrane modifying method based on metallic oxide particles.

Provided is a filter membrane modifying method based on metallic oxide particles, relating to the field of membrane method water treatment. The method aims to resolve the problems existing in a common organic membrane or inorganic membrane that an intercepted substance is easily adsorbed on the surface of the membrane and in membrane holes during use so that the membrane holes are clogged, a membrane body is polluted, flux attenuation is quick, the service life of the membrane is shortened, and the backwashing efficiency is low. The method comprises: preparing a solution containing metallic oxide particles, then filtering, by using a filter membrane, the solution containing metallic oxide particles, and forming a metallic oxide particle cover layer on the surface of the filter membrane, i.e., completing the filter membrane modifying method based on metallic oxide particles.

A system for recovering valuables from vent gas in polyolefin production is disclosed. The system includes a compression device, a drying device, a condensation and separation device, and a membrane separation device that are connected to each other in sequence. The drying device includes a first adsorption bed and a second adsorption bed which are in parallel connection with each other and in which a desiccant is provided, and a third adsorption bed which is in communication with the first adsorption bed and the second adsorption bed respectively and in which a desiccant is provided. The first adsorption bed and the second adsorption bed are in an adsorption process and a regeneration process alternately, and the third adsorption bed is in an auxiliary regeneration process. A process for recovering valuables from vent gas in polyolefin production is further disclosed. When the system and the process are used, one part of the normal temperature compressed gas stream output by the compression device directly serves as a regeneration gas for regeneration of saturated desiccant in adsorption bed, and it is unnecessary for external supply of regeneration gas, whereby the actual recovery of nitrogen can be effectively improved. Membrane separation technology is combined, and hydrocarbon recovery can be effectively improved as well.