51results about How to "Reduce gas load" patented technology

Improvements have been made for collecting, focusing, and directing of ions and/or charged particles generated at atmospheric or near atmospheric pressure sources, such as but not limited to, electrospray; atmospheric pressure discharge ionization, chemical ionization, photoionization, and matrix assisted laser desorption ionization; and inductively coupled plasma ionization. A multiple-aperture laminated structure is place at the interface of two pressure regions. Electric fields geometries and strengths across the laminated structure and diameters of the apertures; all of which act to optimize the transfer of the ions from the higher pressure region into the lower pressure region while reducing the gas-load on the lower pressure region. Embodiments of this invention are methods and devices for improving sensitivity of mass spectrometry when coupled to atmospheric, near atmospheric, or higher pressure ionization sources by reducing the gas-load on the vacuum system.

A method for forming an ultra-thin membrane for use in a chemical analyzer such as a mass spectrometer includes the step of applying a sacrificial blocking layer onto a porous substrate, applying a semi-permeable membrane layer onto the sacrificial blocking layer, and removing the sacrificial blocking layer following cure of the membrane layer. In a preferred version, at least one of the blocking layer and the membrane layer are applied to the porous support by means of spin coating, though other deposition techniques can be employed.

A portable neutron generator includes a Radio Frequency Quadrupole linear accelerator designed to accelerate charged particles of hydrogen (protons) to energies useful for producing neutrons with the (p,n) reaction on lithium. The ion source is driven by a coaxial feed and a spiral antenna to couple the microwave power into the plasma. The linear accelerator is driven by a 600 MHz pulsed RF power supply. A differential pumping scheme is used to balance the need for a high gas load on the ion source end and good vacuum on the accelerator end.

The invention discloses a method for separating benzene/toluene and a methanol-alkylated reaction product. The method comprises the steps of: condensing the alkylated reaction product and separating a water phase and an oil phase from the condensed alkylated reaction product by an oil-water separation tank; making the water phase enter an efficient oil-water separator to be subjected to deep separation so as to separate the oil phase and the water phase; making the oil phase separated by the oil-water separator and the efficient oil-water separator enter an equal-diameter benzene/toluene tower to rectify to separate; returning the components on the top of the benzene/toluene tower to a reactor for continuously reacting or discharging out the components as process products from the benzene/toluene tower; making the components on the bottom of the tower continuously enter a dimethylbenzene rectification tower to rectify; and, finally separating the dimethylbenzene product. The process provided by the invention reduces the rectification need of benzene/toluene in the equipment. A separation process of alkylated reaction products that reduces the investment cost of the equipment is provided. The rectification efficiency and the recovery rate of the products are enhanced.

The present invention relates to inductively coupled plasma mass spectrometry (ICPMS) in which a collision cell is employed to selectively remove unwanted artefact ions from an ion beam by causing them to interact with a reagent gas. The present invention provides a first evacuated chamber (6) at high vacuum located between an expansion chamber (3) and a second evacuated chamber (20) containing the collision cell (24). The first evacuated chamber (6) includes a first ion optical device (17). The collision cell (24) contains a second ion optical device (25). The provision of the first evacuated chamber (6) reduces the gas load on the collision cell (24), by minimising the residual pressure within the collision cell (24) that is attributable to the gas load from the plasma source (1). This serves to minimise the formation, or re-formation, of unwanted artefact ions in the collision cell (24).

A system for controlling a gas load imposed upon a high vacuum chamber includes a first chamber enclosing a high vacuum and positioned within an ambient environment, a second chamber enclosing a gas and positioned within the ambient environment adjacent to the first chamber, and a rotatable shaft having a first portion extending into the first chamber and a second portion extending into the second chamber. A ferrofluid seal is positioned about the rotatable shaft and positioned between the first portion and the second portion and the ferrofluid seal fluidically separates the first chamber from the second chamber. A control unit is attached to the second chamber and configured to control the gas enclosed in the second chamber such that a gas load in the first chamber is reduced.

The present invention provides a thermal analyzer having a cooling device which can realize cooling of a specimen to a temperature equal to or below −100° C. by suppressing the consumption of gas also in performing rapid cooling. The cooling device includes a cooling gas inlet port and a cooling gas discharge port for a gas cooling device and an electric cooling device fixing mechanism, wherein the cooling device and the thermal analyzer are brought into thermal contact with each other. Due to such a constitution, it is possible to simultaneously connect the gas cooling device and the electric cooling device.

The invention discloses a crude oil pressure-reduced distillation method and a crude oil pressure-reduced distillation device. A flash tower is arranged between a reduced-pressure furnace and a reduced-pressure distillation tower, an oil transfer line is eliminated, a reduced-pressure distillation raw material is heated in the reduced-pressure furnace and directly enter the flash tower, a small amount of stripping gas is introduced into the flash tower, and the liquid phase, namely flash bottom oil, obtained by gas-liquid separation in the flash tower is introduced into the reduced-pressure distillation tower; and a gas phase, namely flash top gas, discharged from the top of the flash tower is condensed into a liquid phase to be led out of the device. A high-temperature hydrogen or inert gas is introduced into the bottom of the flash tower. When the pressure-reduced distillation method and the pressure-reduced distillation device, in which the flash tower for high-temperature hydrogen or inert gas stripping flash tower is arranged behind the reduced-pressure furnace, are used, the yield of a reduced-pressure fraction oil is increased, the conventional reduced-pressure oil transfer line is not used, the operation load of the reduced-pressure furnace is lowered, and the tower diameter of the reduced-pressure tower can be reduced properly; therefore, equipment investment is reduced, and operation cost is reduced.

In accordance with one specific embodiment of the present invention, the apparatus for sputter deposition within an evacuated volume comprises a compact ion source to generate ions into which an ionizable gas is introduced and from which ions leave with directed energies near or below the sputtering threshold, a sputter target near that source and located within the beam of ions leaving that source, a sputter target with a grounded shield that defines the target portion exposed to sputtering, and a power supply to bias the target negative relative to ground so that ions are attracted to and sputter the target. Particles sputtered from the target are deposited on a deposition substrate separate from both the ion source and the sputter target. For an insulating target, the target is biased with a radiofrequency power supply and the bias has a mean negative value rather than a direct-current negative value relative to ground. The rate and energy with which the ions arrive at the target determine the rate with which that target is sputtered and the deposition rate on the substrate. In using a compact gridless ion source, the high pressure required for generating ions is confined to the ion source, reducing the pumping gas load. For ion energies at or near the sputtering threshold, the sputtering from extraneous hardware is reduced or eliminated. In addition, the target biases can be low enough to minimize the damage due to energetic neutrals that result from reflection of energetic target ions.

The invention discloses a crude oil distillation method. A primary flash distillation tower is arranged between a normal pressure distillation tower and a pressure reduction furnace, a pressure reduction oil line from an outlet of the pressure reduction furnace to a pressure reduction distillation tower is omitted, a secondary flash distillation tower is arranged between the pressure reduction furnace and the pressure reduction distillation tower, tower bottom heavy oil of the normal pressure distillation tower, i.e. normal bottom oil enters the primary flash distillation tower after being mixed with cyclic pressure reduction slag oil, the tower top gas phase of the primary flash distillation tower is converted into a liquid phase to be used as products through heat exchange and condensing, bottom oil of the primary flash distillation tower enters the secondary flash distillation tower through being heated by the pressure reduction furnace, the tower top gas phase of the secondary flash distillation tower is converted into a liquid phase to be used as products through heat exchange and condensing, and bottom oil of the secondary flash distillation tower is introduced into a flash distillation section of the pressure reduction distillation tower for pressure reduction distillation. Compared with the prior art, the method has the advantages that on one hand, the yield of the pressure reduction slag oil is reduced, and the economic benefits of devices are improved; and on the other hand, the load of the pressure reduction furnace and the pressure reduction distillation tower is reduced, the device investment is saved, and the energy consumption of the devices is reduced.

A method and apparatus for reducing dynamic loading of a gas turbine engine is provided. The gas turbine engine includes a rotor shaft assembly including a rotor shaft, a bearing assembly, a mounting race, and a support frame, the mounting race including a spherical surface. The method includes supporting the rotor shaft on the gas turbine engine support frame with the bearing assembly, the rotor shaft including a yield portion configured to permit bending of the rotor shaft during an imbalance operation.

A method of changing the kinetic energy of ions is provided, comprising: trapping ions in a trapping region of an ion trap; and directing a beam of gas through the trapping region, so as to change the kinetic energy of the trapped ions thereby. Also provided is a method of separating ions, the method comprising: causing ions to enter a trapping region of an ion trap along a first axis of the trapping region; directing a beam of gas along the first axis and applying an electric potential in the direction of the first axis so as to cause separation of the ions based on their ion mobility. An ion trap and a mass spectrometer for performing the methods are also provided.

The invention belongs to the technical field of coal chemical industry device process design optimization and waste heat recycling. The invention provides a carbon monoxide conversion system and method for a coal water slurry gasification-to-methanol device. In combination with the characteristics of partial conversion of carbon monoxide and energy utilization of a coal-to-methanol device, the technological process is optimized and built, crude synthesis gas from an upstream gasification device is divided into two streams, and one stream is heated by a crude gas preheater and then enters a conversion furnace through a detoxification tank to be subjected to a chemical reaction; and the other stream of non-shifted gas which does not participate in the reaction is used as mixing gas to be mixed with the shifted gas subjected to the reaction. And a good energy utilization effect is obtained while the process production requirements are met, and the investment cost is saved.

A lithographic projection apparatus includes a radiation system configured to supply a beam of radiation; a mask table provided with a mask holder for holding a mask; a substrate table provided with a substrate holder for holding a substrate; a projection system configured to image an irradiated portion of the mask onto a target portion of the substrate, wherein the projection system is separated from the substrate table by an intervening space that is at least partially evacuated and is delimited at the location of the projection system by a solid surface from which the employed radiation is directed toward the substrate table; the intervening space contains a hollow tube located between the solid surface and the substrate table and situated around the path of the beam of radiation, the tube being configured such that beam of radiation focused by the projection system onto the substrate table does not intercept a wall of the hollow tube; a flushing system is configure to continually flush the inside of the hollow tube with a flow of gas, wherein the gas is hydrogen, the flow of the gas is opposed to the flow of contaminants from the substrate and/or the hollow tube is in fluid communication with the intervening space.

The invention discloses a method for extracting 2,6-dimethylphenol from crude phenol and a device applied to the method. A two-stage distillation technology is adopted for the method, primary distillation treatment is performed on crude phenol firstly to remove light components lighter than 2,6-dimethylphenol, the light components are prevented from affecting the effect of follow-up secondary distillation treatment, and product yield and quality of 2,6-dimethylphenol are improved; then secondary distillation treatment under specific operation conditions is performed, especially, the operationpressure of the secondary distillation treatment is controlled to be not higher than 5 KPa, so that on one hand, the relative volatility of 2,6-dimethylphenol and other components in a primary distillation product is improved and high-concentration 2,6-dimethylphenol can be obtained by extraction, on the other hand, 2,6-dimethylphenol cannot have an isomerism change in the distillation processes,and the 2,6-dimethylphenol separation effect is guaranteed. Tests prove that the yield of 2,6-dimethylphenol is as high as 99.98%, and the purity is as high as 99.9%.

The invention relates to a catalytic cracking regenerated catalyst system and a gas collecting method. The catalytic cracking regenerated catalyst system comprises a regenerator; a gas collecting device is arranged in the regenerator, is a gas-guide pipe with an inverted L-shaped structure and comprises a stretching regenerated vertical pipe section, a dense phase region section, a dilute phase region section, an inverted L-shaped section and a smoke dispersing section, wherein the stretching regenerated vertical pipe section is inserted into a regenerated vertical pipe; the smoke dispersing section is arranged in a dilute phase region and is bell mouth-shaped; and notches for collecting gases are uniformly arranged on the stretching regenerated vertical pipe section and the dense phase region section. According to the gas collecting method provided by the invention, smoke in a regenerated catalyst is pressed into the gas-guide pipe through the notches arranged on the gas collecting device inside the regenerated vertical pipe by mainly using a pressure difference between a dense phase region and the dilute phase region, then enters the dilute phase region through the smoke dispersing section and finally is absorbed and discharged through a cyclone separator. According to the gas collecting method, the amount of the smoke in the regenerated catalyst carried into a follow-up reaction system is effectively reduced, and the processing capacity is increased.

The invention relates to a catalytic reforming recontacting process with cold capacity equilibrium setting, introduced based on the research on the characteristics of the reforming reaction recontacting process flow and the gas-liquid equilibrium characteristics of the product. Two pumps are installed at the bottom of the first gas-liquid separation tank, after being boosted, two-stranded liquid phase enter a recontacting system and a reforming oil fractionation system respectively, the ratio of the two liquid phases can be flexibly adjusted to optimize the recontacting effect and reduce energy consumption; second, third and fourth gas-liquid separation tanks use the way of heat exchange or setting a cooler to reduce the recontacting temperature, reduce the gas phase load of the compressorinlet and the energy consumption; the liquid phase of the second and third gas-liquid separation tanks directly enters the subsequent reforming oil separation system to reduce the accumulation and circulation of the liquefied gas and the above hydrocarbon components in the recontacting system to reduce the energy consumption of device.