8392 results about "Desorption" patented technology

A system and method for that allows one part of an atomic layer deposition (ALD) process sequence to occur at a first temperature while allowing another part of the ALD process sequence to occur at a second temperature. In such a fashion, the first temperature can be chosen to be lower such that decomposition or desorption of the adsorbed first reactant does not occur, and the second temperature can be chosen to be higher such that comparably greater deposition rate and film purity can be achieved. Additionally, the invention relates to improved temperature control in ALD to switch between these two thermal states in rapid succession. It is emphasized that this abstract is provided to comply with rules requiring an abstract. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

The invention is directed to a novel approach to thin film synthesis that is described as high vacuum plasma-assisted chemical vapor deposition (HVP-CVD). In one application of HVP-CVD, atomic oxygen and organometallic precursors are simultaneously introduced into a high vacuum chamber. Gas-phase chemistry is eliminated or substantially eliminated in the collisionless or substantially collisionless environment, allowing the surface chemistry between atomic oxygen and the precursor(s) to be interrogated directly. In preliminary work it has been observed that the presence of atomic oxygen greatly accelerates the desorption of organic ligands, facilitating oxide formation. The prominent advantages of the HVP-CVD include reduced substrate temperature, significant rates, inherent uniformity, facilitated doping, and the ability to directly study these processes in-situ with high vacuum diagnostics that are not compatible with conventional CVD technologies.

An absorbent article having an ultimate fluid storage region and a fluid distribution region, positioned between the ultimate storage region and the garment oriented surface of the article, in fluid communication with the ultimate fluid storage region, the ultimate fluid storage region includes a material which has: (1) a Capillary Sorption Desorption Capacity at 100 cm (CSDC 100) of at least 10 g/g; (2) a Capillary Sorption Desorption Capacity at 0 cm (CSDC 0) higher than the CSDC 100; (3) a Loosely Bound Liquid Capacity (LBLC); and (4) a Capillary Sorption Desorption Release Height when 50% of the LBLC are released (CSDRH 50) less than 60 cm. Further, the liquid distribution layer material has a Capillary Sorption Absorption Height at 30% of its maximum capacity (CSAH 30) of at least 35 cm. Distribution material can be foam materials, particularly those derived from high internal phase water-in-oil emulsions.

Methods and apparatus for extracting liquid water from ambient air, including ambient air in severely arid and hot climates, are described. An example apparatus uses a sorption-desorption-condensation cycle using a sorption wheel to extract moisture from ambient air and concentrate the water vapor driven off from the sorption material in a circulating gas, with condensation of liquid water from the circulating gas.

Provided is a bottom gate type thin film transistor including on a substrate (1) a gate electrode (2), a first insulating film (3) as a gate insulating film, an oxide semiconductor layer (4) as a channel layer, a second insulating film (5) as a protective layer, a source electrode (6), and a drain electrode (7), in which the oxide semiconductor layer (4) includes an oxide including at least one selected from the group consisting of In, Zn, and Sn, and the second insulating film (5) includes an amorphous oxide insulator formed so as to be in contact with the oxide semiconductor layer (4) and contains therein 3.8×10¹⁹ molecules/cm³ or more of a desorbed gas observed as oxygen by temperature programmed desorption mass spectrometry.

This invention relates generally to a mass spectrometer probe and a method of using said probe for desorption and ionization of analytes. The sample probe comprises an affinity reagent on the probe surface, wherein the affinity reagent is capable of selectively binding an analyte. An analyte bound to the affinity reagent can be desorbed by a high energy source and detected in the mass spectrometer. The probe and methods are useful in detection and analysis of macromolecules such as proteins or other biomolecules.

The present invention is an absorbent structure to be used in absorbent articles, having at least a first region for acquisition/distribution of fluid and a second region for storage of fluid. The first region can contain materials which have a relatively high capillary desorption pressure, as the materials in the second region exhibit a sufficiently high capillary absorption pressure so as to still efficiently drain the first region.The first region material has a Capillary Sorption Desorption Height (CSDH 90) of more than 40 cm and the second region material satisfies at least one of following requirements:(a) an absorption capacity of at least 15 g/g at 35 cm in the capsorption test;(b) an absorption capacity of at least 15 g/g at 0 cm in the capsorption test and an absorption efficiency of at least 55% at 40 cm;(c) a Capillary Sorption Absorption height at 50% of its capacity at 0 cm absorption height (CSAH 50) of at least 35 cm in the capsorption test.

This invention provides methods of retentate chromatography for resolving analytes in a sample. The methods involve adsorbing the analytes to a substrate under a plurality of different selectivity conditions, and detecting the analytes retained on the substrate by desorption spectrometry. The methods are useful in biology and medicine, including clinical diagnostics and drug discovery.

The present invention provides compact adsorption systems that are capable of rapid temperature swings and rapid cycling. Novel methods of thermal swing adsorption and thermally-enhanced pressure swing adsorption are also described. In some aspects of the invention, a gas is passed through the adsorbent thus allowing heat exchangers to be very close to all portions of the adsorbent and utilize less space. In another aspect, the adsorption media is selectively heated, thus reducing energy costs. Methods and systems for gas adsorption/desorption having improved energy efficiency with capability of short cycle times are also described. Advantages of the invention include the ability to use (typically) 30-100 times less adsorbent compared to conventional systems.

An ion source is disclosed for forming multiply-charged analyte ions from a solid sample. A beam of pulsed radiation is directed onto a portion of the sample to desorb analyte molecules. A retaining structure holding a solvent volume is positioned proximate the sample. Desorbed analyte molecules contact a free surface of the solvent and pass into solution. The solution is then conveyed through an outlet passageway to an electrospray apparatus, which introduces a spray of charged solvent droplets into an ionization chamber.

Porous-material-supported polymer sorbents and process for removal of undesirable gases such as H₂S, COS, CO₂, N₂O, NO, NO₂, SO₂, SO₃, HCl, HF, HCN, NH₃, H₂O, C₂H₅OH, CH₃OH, HCHO, CHCl₃, CH₂Cl₂, CH₃Cl, CS₂, C₄H₄S, CH₃SH, and CH₃—S—CH₃ from various gas streams such as natural gas, coal/biomass gasification gas, biogas, landfill gas, coal mine gas, ammonia syngas, H₂ and oxo-syngas, Fe ore reduction gas, reformate gas, refinery process gases, indoor air, fuel cell anode fuel gas and cathode air are disclosed. The sorbents have numerous advantages such as high breakthrough capacity, high sorption/desorption rates, little or no corrosive effect and are easily regenerated. The sorbents may be prepared by loading H₂S—, COS—, CO₂—, N₂O, NO—, NO₂—, SO₂—, SO₃—, HCl—, HF—, HCN—, NH₃—, H₂O—, C₂H₅OH—, CH₃OH—, HCHO—, CHCl₃—, CH₂Cl₂—, CH₃Cl—, CS₂—, C₄H₄S—, CH₃SH—, CH₃—S—CH₃-philic polymer(s) or mixtures thereof, as well as any one or more of H₂S—, COS—, CO₂—, N₂O, NO—, NO₂—, SO₂—, SO₃—, HCl—, HF—, HCN—, NH₃—, H₂O—, C₂H₅OH—, CH₃OH—, HCHO—, CHCl₃—, CH₂Cl₂—, CH₃Cl—, CS₂—, C₄H₄S—, CH₃SH—, CH₃—S—CH₃-philic compound(s) or mixtures thereof on to porous materials such as mesoporous, microporous or macroporous materials. The sorbents may be employed in processes such as one-stage and multi-stage processes to remove and recover H₂S, COS, CO₂, N₂O, NO, NO₂, SO₂, SO₃, HCl, HF, HCN, NH₃, H₂O, C₂H₅OH, CH₃OH, HCHO, CHCl₃, CH₂Cl₂, CH₃Cl, CS₂, C₄H₄S, CH₃SH and CH₃—S—CH₃ from gas streams by use of, such as, fixed-bed sorbers, fluidized-bed sorbers, moving-bed sorbers, and rotating-bed sorbers.

Ion manipulation systems include ion repulsion by an RF field penetrating through a mesh. Another comprises trapping ions in a symmetric RF field around a mesh. The system uses macroscopic parts, or readily available fine meshes, or miniaturized devices made by MEMS, or flexible PCB methods. One application is ion transfer from gaseous ion sources with focusing at intermediate and elevated gas pressures. Another application is the formation of pulsed ion packets for TOF MS within trap array. Such trapping is preferably accompanied by pulsed switching of RF field and by gas pulses, preferably formed by pulsed vapor desorption. Ion guidance, ion flow manipulation, trapping, preparation of pulsed ion packets, confining ions during fragmentation or exposure to ion to particle reactions and for mass separation are disclosed. Ion chromatography employs an ion passage within a gas flow and through a set of multiple traps with a mass dependent well depth.

In general, the purpose of the probe system is to provide improved rapid field methods using re-designed direct push technology (DPT) and “push-pull testing” concepts to evaluate in situ chemical, biochemical, surfactant, adsorptive media, and leaching and fixation remediation technologies for hazardous subsurface contaminant(s). The probe system and methods described here when applied to a hazardous waste site being considered for in situ remediation of contaminants (organic or inorganic) by the listed treatment technologies will yield information that greatly reduces the uncertainty with regards to treatment effectiveness for the in situ soil, groundwater, and contaminant(s) conditions affecting dosage requirements and reaction rate(s) for various reactants. The probe system described here is multi-purpose in that it was designed: 1) to measure the relative permeability of the subsurface soil and groundwater to a liquid or gas ejectant, 2) to recover soil gas, soil, or groundwater samples for contaminant analyses, 3) to measure the chemical dosage and reaction, dissolution, adsorption, desorption, leaching, or fixation rate of a reactant such as a chemical or biochemical oxidant, metallic or bimetallic dehalogenating agent, surfactant or emulsifier solution, adsorbent media regenerant, leaching or fixation reagent that is injected into the matrix and withdrawn during a push-pull test, 4) to perform combinations of the above, 5) to measure the in situ adsorption capacity of adsorbent media and subsequently measure the effectiveness of regenerant(s) for the adsorbent media, and (6) to measure the effectiveness of a treated soil column for inorganic contaminant(s) leaching or fixation. In addition to being an in situ remedial alternatives evaluation tool, the probe system can be used as a reactant(s) delivery device after the specific remedial technology has been selected.

The invention relates to a process for preparing butadiene from n-butenes, which comprises the following steps:

• • A) provision of a feed gas stream a comprising n-butenes;
  • B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases;
  • C) cooling and compression of the product gas stream b in at least one cooling stage and at least one compression stage, with the product gas stream b being brought into contact with a circulated coolant to give at least one condensate stream c1 comprising water and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases;
  • D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by absorption of the C₄-hydrocarbons comprising butadiene and n-butenes in a circulated absorption medium, giving an absorption medium stream loaded with C₄-hydrocarbons and the gas stream d2, and subsequent desorption of the C₄-hydrocarbons from the loaded absorption medium stream to give a C₄ product gas stream d1;
  • E) separation of the C₄ product stream d1 by extractive distillation using a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes;
  • F) distillation of the stream e1 comprising butadiene and the selective solvent to give a stream f1 consisting essentially of the selective solvent and a stream f2 comprising butadiene;
  • where samples are taken from the circulated coolant in step C) and/or the circulated absorption medium in step D) and the peroxide content of the samples taken is determined by means of iodometry, differential scanning calorimetry (DSC) or microcalorimetry.