3803 results about "Liquefaction" patented technology

A fluid storage and dispensing system comprising a vessel for holding a fluid at a desired pressure. The vessel has a pressure regulator, e.g., a single-stage or multi-stage regulator, associated with a port of the vessel, and set at a predetermined pressure. A dispensing assembly, e.g., including a flow control means such as a valve, is arranged in gas/vapor flow communication with the regulator, whereby the opening of the valve effects dispensing of gas/vapor from the vessel. The fluid in the vessel may be constituted by a liquid that is confined in the vessel at a pressure in excess of its liquefaction pressure at prevailing temperature conditions, e.g., ambient (room) temperature. In another aspect, the vessel contains a solid-phase sorbent material having sorbable gas adsorbed thereon, at a pressure in excess of 50 psig. The vessel may have a >1 inch NGT threaded neck opening, to accommodate the installation of an interior regulator.

The present invention relates to a hybrid enzyme comprising carbohydrate-binding module amino acid sequence and a fungal alpha-amylase amino acid sequence and to a variant of a fungal wild type enzyme comprising a carbohydrate-binding module and an alpha-amylase catalytic module. The invention also relates to the use of the hybrid enzyme or the variant in starch liquefaction.

In discharging a source gas from a first process gas nozzle, rectifying members including a coolant flow passage provided in a concertinaing manner therein are arranged both sides of the first process gas nozzle. Then, a coolant at a temperature higher than a liquefaction temperature of the source gas and lower than a thermal decomposition temperature of the source gas is flown through the coolant flow passage, by which the first process gas nozzle is cooled through the rectifying member.

A preparation (10, 11,12,13) to be fixed to a natural tooth part or tooth, in particular for the replacement of a load-bearing tooth part, is for example a filling for a drilled-out tooth (1), a crown, bridge or prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a tooth root for fastening an artificial tooth, a bridge or a prosthesis. The preparation has surface regions which consist of a material with thermoplastic properties. The preparation (10, 11, 12,13) is designed in a manner such that it has oscillation properties with such low damping losses that for a liquefaction of the material with thermoplastic properties by way of oscillations there are local stress concentrations required, and in a manner such that such stress concentrations only occur in the region of the preparation surface. The preparation is positioned on a suitably prepared natural tooth part in a manner such that the material with the thermoplastic properties is in contact or may be brought into contact with the dentin surface and/or enamel surface. The preparation is then made to mechanically oscillate and is simultaneously pressed against the natural tooth part, whereby the material with the thermoplastic properties is at least partly liquefied and brought into intimate contact with the dentin or enamel surface in a manner such that after solidification it forms a positive fit and/or material fit connection. Teeth restored with such preparations have a high stability and a long life, which in particular is attributed to the fact that the thermoplastic material, in contrast to cements used for the same purpose, shrinks less and has the ability to relieve internal stress by creeping.

The invention provides a method for preparing hydrogen and LNG from coke oven gas. The method comprises the following steps: electric decoking; boosting of the coke oven gas by a compression system; cooling of the raw gas coke oven gas by using the BOG gas (the BOG gas is a gas formed after the passive heating gasification of LNG) of LNG in order to further remove tar, benzene, naphthalene and like substances in the coke oven gas; and pretreatment using a TSA process to finely remove macromolecular impurities, such as tar, benzene, naphthalene and the like; wet and dry two-stage desulfurization for removing sulfides in the coke oven gas; two-stage low pressure shifting for a reaction of CO and water vapor to form CO2 and hydrogen; and pressurization using a compressor, an MDEA solution process for removing carbon dioxide, a membrane separation technology for separating hydrogen and methane, separation, concentration and purification of the hydrogen and methane, and dehydration, demercuration and liquefaction of the separated high-concentration methane to obtain the LNG. The coke oven gas is finally converted into the hydrogen and the LNG which have high values, so the energy of thecoke oven gas is fully used, and the environment is protected.

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it, expanded to an intermediate pressure, and then supplied to a distillation column at a first mid-column feed position. The second stream is also expanded to intermediate pressure and is then supplied to the column at a second lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the second stream and is cooled to condense at least a part of it, forming a reflux stream. At least a portion of the reflux stream is directed to the distillation column as its top feed. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

The described invention relates to processes and systems for treating a gas stream, particularly one rich in methane for forming liquefied natural gas (LNG), said process including: (a) providing a gas stream; (b) providing a refrigerant; (c) compressing said refrigerant to provide a compressed refrigerant; (d) cooling said compressed refrigerant by indirect heat exchange with a cooling fluid; (e) expanding the refrigerant of (d) to cool said refrigerant, thereby producing an expanded, cooled refrigerant; (f) passing said expanded, cooled refrigerant to a first heat exchange area; (g) compressing the gas stream of (a) to a pressure of from greater than or equal to 1,000 psia to less than or equal to 4,500 psia; (h) cooling said compressed gas stream by indirect heat exchange with an external cooling fluid; and heat exchanging the compressed gas stream with the expanded, cooled refrigerant stream.

The present invention provides an apparatus and a method for conversion of cellulosic material, such as chopped straw and corn stover, and household waste, to ethanol and other products. The cellulosic material is subjected to continuous hydrothermal pre-treatment without addition of chemicals, and a liquid and a fibre fraction are produced. The fibre fraction is subjected to enzymatic liquefaction and saccharification. The method of the present invention comprises:

• • performing the hydrothermal pre-treatment by subjecting the cellulosic material to at least one soaking operation, and conveying the cellulosic material through at least one pressurised reactor, and subjecting the cellulosic material to at least one pressing operation, creating a fibre fraction and a liquid fraction;
  • selecting the temperature and residence time for the hydrothermal pretreatment, so that the fibrous structure of the feedstock is maintained and at least 80% of the lignin is maintained in the fibre fraction.

A portable oxygen concentrator includes a pressure swing absorption system defined by a relatively rigid housing adapted to generate a flow of oxygen enriched gas and a battery adapted to provide power to the pressure swing absorption system. The oxygen concentrator has a total weight of less than about 10 lbs, has a maximum flow of 100% O₂ equivalent gas of about 0.9 lpm, has a total volume less than about 800 in³, and gas a battery life of at least about 8 hours. The present invention also using a liquefaction or transfill system in combination with such an oxygen concentrator.

An ultrasonic liquefaction endodontic system having a graspable hand piece having a flow passageway therethrough. An ultrasonic energy generator is secured to the hand piece. A flexible injection tube is dimensioned for insertion into a tooth root canal. A source of flushing fluid under pulsed pressure is connected to the hand piece by which fluid pressure pulses having ultrasonic energy superimposed thereon are forced into a root canal.

Process for the liquefaction of natural gas and the recovery of components heavier than methane wherein natural gas is cooled and separated in a first distillation column into an overhead vapor enriched in methane and a bottoms stream enriched in components heavier than methane, wherein the first distillation column utilizes a liquefied methane-containing reflux stream. This reflux stream may be provided by a condensed portion of the overhead vapor or a portion of totally condensed overhead vapor that is subsequently warmed. The bottoms stream may be separated in one or more additional distillation columns to provide one or more product streams, any of which are partially or totally withdrawn as recovered hydrocarbons. A stream of unrecovered liquid hydrocarbons may be combined with either the condensed portion of the overhead vapor or a portion of totally condensed overhead vapor that is subsequently warmed.

The invention discloses a method for producing fuel oil by biomass hydrothermal liquefaction. The method is characterized by comprising the following steps: fully mixing a biomass raw material and solvent water (or adding catalyst water solution) to prepare seriflux, wherein a mass ratio of a catalyst to the raw material is 1:10 to 1:50, and the mass ratio of the raw material to water is 1:2 to 1:8; performing a reaction in a slurry bed reactor under a reducing atmosphere; controlling a liquefaction reaction temperature between 300 and 450 DEG C, a reaction pressure between 5 and 30 MPa and reaction time between 5 and 40 minutes; after the reaction, separating a product to obtain the fuel oil, solid residue, water, gas and the like. The method has the advantages of achieving complete biomass conversion, high oil product productivity, obtaining an oil product with a heat value equal to that of standard oil, relieving dependence on fossil energy, contributing to environment protection, lowering production cost and achieving good social and economic benefits.

A compact and modular cryogenic method and apparatus for liquefying natural gas. The liquefaction process is highly efficient and requires no external refrigeration system, and the apparatus is small enough to be transportable from one remote site to another. A compressed natural gas feed stream is cooled and then expanded to form a bi-phase stream comprising a first refrigerated vapor component and a first liquid component. The first liquid component is then separated from the bi-phase stream and expanded to form a second bi-phase stream comprising a second refrigerated vapor component and a second liquid component. The second liquid component is then introduced into a means configured for storage and transport. The remaining feed stream can then be recycled, and at least a substantial portion of the original feed stream can be processed into liquefied natural gas (LNG). The first and second vapor components are recycled through the system and comprise at least a portion of the feed stream in the repeated steps.

A method comprising selection of unbroken whole grain rice that are first washed, or whole grain corn that is first reduced in size, and then making an aqueous slurry that is subsequently wet milled to release all the protein, fat, fiber, and starch components normally held in the structure of the grain. The resulting slurry can be reacted with heat to gelatinize the starch and the subsequent product dried. Also, the heated slurry containing the liberated components can be treated to enzymatic hydrolysis via the process of liquefaction and optionally saccharification, producing whole grain rice milk products having diverse carbohydrate compositions. The whole grain milk products are characterized by a nutritional composition containing substantially all the nutritional components of the whole grain, being an opaque whole milk colloid, having smooth texture versus pulpiness, lacking in all bitterness normally associated with whole grain products, and having a variety of sweetness levels from non-sweet to very sweet.

A spindle device of a machine tool, which can prevent the liquefaction of atomized cutting fluid in atomized cutting fluid passage downstream of a straightening unit 14, enhance a responsiveness to an ejecting start or stop instruction, and prevent a waste of cutting fluid. The spindle device for a machine tool has atomized cutting liquid passage (e1, e2) each having a single-shape passage section and formed inside the device ranging from the spindle 1 to the tip end of a cutting tool 13 mounted thereto in one piece, and is operated so as to eject atomized cutting tool 13 via the atomized cutting fluid passages (e1, e2), wherein a straightening unit 14 formed with a plurality of small-diameter passages h are provided in the middle of the cutting liquid passages (e1, e2).

The invention relates to a production process for vinegar, in particular to the standardized and industrialized production process for Shanxi mature vinegar, which solves the problems of long production process period, complex process, unstable product quality, low raw material utilization rate and the like, of the prior production process. The production process comprises the following steps of: performing material processing before alcoholic fermentation, crushing, mixing, liquefaction and saccharification; selecting high-temperature resistant and high-alcoholic strength resistant saccharomyces, and adding a composite yeast to perform alcoholic fermentation; adding the composite acetic bacteria into vinegar residue, stirring with a vinegar residue stirrer, fermenting the vinegar residue in an acetyl hydrate fermenting tank, and turning the vinegar residue with a vinegar residue turning machine; tamping the vinegar residue in the acetyl hydrate fermenting tank, covering a layer of table salt on the tamped vinegar residue, and standing the vinegar residue; fuming the vinegar residue by the combination of a vinegar residue fuming furnace and a steam vinegar residue fuming jar; pouring vinegar; ageing the vinegar; clarifying the vinegar with a crude acidic protease, and filtering the vinegar with kieselguhr; blending the vinegar and the traditional Shanxi mature vinegar; sterilizing the vinegar; and packing the vinegar. The process of the invention has the advantages of systematized flow, standardized technological parameters, scale production procedure, normalized product quality and optimized production process.

Nitrogen is removed from a liquefied natural gas feed (41) by a two stage separation in which the liquefied natural gas (41) is first fractionated (23) to provide a first nitrogen-enriched overhead vapour stream (46) and a nitrogen-containing bottoms liquid stream (19) and then at least a portion of said bottoms liquid stream (19) is fractionated (25) to provide a second nitrogen-enriched overhead vapour stream (36) that is of lower purity than said first overhead vapour stream (46) and a purified liquefied natural gas stream (50). The first fractionation is conducted in a distillation column (23) refluxed (45) with nitrogen overhead (43) condensed in a condenser (24) located in a flash drum (25) in which the second fractionation is conducted. The second nitrogen-enriched overhead vapour stream (36) provides fuel gas for use in the natural gas liquefaction plant.

The invention relates to a beverage and a preparation method thereof, in particular relates to a fermented starch crop beverage and the preparation method thereof, and belongs to the technology field of food. The beverage has the steps as follows: (1) starch crops are processed through jordaning after being soaked; (2) gelatinization is performed; (3) heat preservation liquefaction and heating inactivation are performed; (4) heat preservation saccharification is performed; (5) filtering is performed; (6) sterilization is performed; (7) fermentation is performed; (8) the processed starch crops are homogenized, sterilized, cooled, and canned. The method not only provides a novel deep-processed way of starch crops, but also obtains a novel beverage.

A method for liquefying a natural gas stream is provided. In one embodiment, the method includes placing a mixed component refrigerant in a heat exchange area with a process stream; separating the mixed component refrigerant at one or more pressure levels to produce a refrigerant vapor and a refrigerant liquid; bypassing the refrigerant vapor around the heat exchange area to a compression unit; and passing the refrigerant liquid to the heat exchange area. In another embodiment, the method further includes partially evaporating the refrigerant liquid stream within the heat exchange area to retain a liquid fraction of at least 1% by weight.

The invention discloses an arc plasma torch preparing nanometer charcoal fibrous material method, which comprises the following steps: placing untreated leavings of liquefying coal directly in direct current arc plasma torch to carry on heat-treatment; using nitrogen for arc working gas under atmosphere pressure; getting nanometer charcoal fibrous material after 120-175 seconds, wherein there is no need to add in any activators in preparing process. The method is characterized by the following: the craft route is simple; the raw material is the waste of coal hydrogenant liquefaction craft; it's a good way to use coal liquification leavings to prepare high-added value, functional carbon material; the nanometer charcoal fibrous material can be used for accelerating agent, catalyst carrier, lithium ion secondary cell anode material, double-layer capacitor electrode, highly effective active solid, release agent and construction reinforced materials.