6562 results about "Propane" patented technology

A process for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the stream and is then directed into heat exchange relation with the tower overhead vapor stream to cool the distillation stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation tower at an upper mid-column feed position. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed. The compressed recycle stream is cooled sufficiently to substantially condense it, and is then expanded to the pressure of the fractionation tower and supplied to the tower at a top column feed position. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower at a temperature whereby the major portion of the desired components is recovered.

The present invention relates to methods for separating and recovering ethane, propane and heavier components from a feed gas, e.g. raw natural gas or a refinery or petroleum plant gas stream or a petrochemical plant gas stream. These methods employ a common new concept which is the use of the turbo-expander shaft compressor to generate the reflux requirement for the cryogenic absorber or distillation columns. The power of the turbo-expander which is absorbed by the shaft compressor is always high enough so that reflux generation by a specific gas compression through the expander shaft compressor and subsequent cooling, condensation and sub-cooling can always be easily maintained. The present invention allows for higher cryogenic absorber pressure and a lower demethanizer/de-ethanizer column pressure thus eliminating the common cryogenic pump at absorber bottom. The present invention ultimately results in a lower residue compression and utilities consumption. The present invention as such allows for a higher 99+% recovery of NGL from the feed gas stream.

The invention relates to a catalyst for dehydrogenating propane to prepare propone, which uses thermal-resistant oxide as carrier, uses palladium-group metal as main catalyst, uses IV A group metal and rare-earth metal as agents, uses halogen as modifier, and uses inorganic oxide with high temperature resistance as adhesive. The inventive catalyst under high temperature and low pressure has higher propane transfer rate, propone selectivity and reaction stability. And the preparation comprises that at 60-100Deg. C, immerging thermal-resistant oxide with rare-earth metal water solution for 2-10h, at 60-180Deg. C baking for 2-10h, at 400-600Deg. C baking for 3-10h, immerging said carrier and the water solution which contains palladium metal and IVA metal at 60-100Deg. C for 2-10h, and baking for 2-10h at 60-180Deg. C, adding adhesive, protruding agent and acid gel solvent, protruding and shaping, baking for 2-10h at 60-180Deg. C, activating for 3-10h at 400-600Deg. C, and reducing for 2-10h in hydrogen flow at 400-600Deg. C.

One or more materials selected from 1,1,1,3,3-pentachloropropane, 1,1,3,3-tetrachloropropene and 1,3,3,3-tetrachloropropene are used as the specific materials described above. Before submitting the materials and HF to a fluorination reaction, almost all water is removed from them.To continuously manufacture useful intended products efficiently as well as to prevent deactivation of the catalyst and the accumulation of organic substances with high boiling points when manufacturing said useful 1,1,1,3,3-pentafluoropropane and/or 1-chloro-3,3,3-trifluoropropene, by fluorinating the specific materials with HF in the presence of a catalyst.

In various embodiments, building management systems and methods are provided as a stand-alone, or network based system that utilizes integrated software that manages bills, consumables (e.g., oil, propane, water, electric, food, etc.), and appointments. In various embodiments, the building management system provides increased safety, security and convenience to a user.

The invention relates to a method for generating the high quality ethylene raw material through naphtha hydrogenation. The method takes naphtha fraction and animal and vegetable oil as the raw material oil, under the condition of hydrofining, the raw material oil and hydrogen are mixed and passed through a hydrofining reaction area, the hydrogen-rich gas recycling utilization can be acquired through separating the hydrofining generated oil, and low Sulfur, low hydrogen and low aromatic naphtha can be acquired through removing hydrogen sulfide of the separated liquid with an air stripping tower. Compared with the prior art, the method has the advantages that the oil is mixed in the naphtha hydrogenation raw material, the quality of the product as the ethylene cracking raw material, in particular to aromatic long chain hydrocarbon nC16 to 18 and propane acquired through the animal and vegetable oil hydrogenation, can be remarkably improved, the cracking furnace ethylene output can be increased and the cracking furnace life can be prolonged through adding the aromatic long chain hydrocarbon nC16 to 18 and propane in the ethylene cracking raw material.

A compact hydrogen generator is coupled to or integrated with a fuel cell for portable power applications. Hydrogen is produced via thermocatalytic decomposition (cracking, pyrolysis) of hydrocarbon fuels in oxidant-free environment. The apparatus can utilize a variety of hydrocarbon fuels, including natural gas, propane, gasoline, kerosene, diesel fuel, crude oil (including sulfurous fuels). The hydrogen-rich gas produced is free of carbon oxides or other reactive impurities, so it could be directly fed to any type of a fuel cell. The catalysts for hydrogen production in the apparatus are carbon-based or metal-based materials and doped, if necessary, with a sulfur-capturing agent. Additionally disclosed are two novel processes for the production of two types of carbon filaments, and a novel filamentous carbon product. The hydrogen generator can be conveniently integrated with high temperature fuel cells to produce an efficient and self-contained source of electrical power.

The invention provides a fracturing sand mixing device used for mixing fracturing fluid. The fracturing sand mixing device comprises a solid-liquid mixing device, and the solid-liquid mixing device is a pressure container. The solid-liquid mixing device comprises a solid lead-in port capable of leading in solid particles of the fracturing fluid, a base fluid lead-in port for leading in base fluid of the fracturing fluid, a mixing inner cavity for accommodating the solid particles and the base fluid and a solid-liquid lead-out port for leading out the fracturing fluid formed by mixing. Substances such as carbon dioxide or petroleum gas which are in a gas state under normal temperature can be kept in a liquid state by high pressure through the fracturing sand mixing device and are mixed with the solid particles to form the fracturing fluid, and the goal of preparing the fracturing fluid with liquid carbon dioxide or liquefied petroleum gas (propane) serving as the base fluid is achieved.

A wicking material is disclosed that exhibits a horizontal wicking velocity of at least about 1.0 millimeter per second when contacted with a physiological fluid such as blood, lymph or cellular interstitial fluid. This high wicking rate is achieved by means of treatment of a fibrous wicking material candidate with a low temperature gas plasma, particularly a glow discharge gas plasma formed in a gaseous blend made up predominantly of a mixture of oxygen with a saturated alkane chosen from the group consisting of methane, ethane and propane. Diagnostic test strips made with the surface-modified wicking material, and containing an immobilized reagent means for analysis of an analyte in a physiological fluid, show improved performance in terms of increased accuracy, finer precision of analyses, reduced time of analysis, a smaller fluid sample size requirement, and improved compliance with manufacturing standards resulting in lower manufacturing costs blood sugar determinations.

The invention relates to a catalyst to make the propene by dehydrogenation propane which takes the modifying alumina medium molecular sieve as the carrier. The catalyst takes the modifying medium molecular sieve by the Al2O3 as the carrier; the platinum and tin double metal catalyst has an alumina weight proportion of 5.0 to 30.0 percent. The active component of the catalyst is the platinum; the weight proportion of the platinum is 0.4 percent; and the weight proportion of the accessory ingredient Sn is 0.1 to 2.0 percent.

A process for the recovery of propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and/or expanded to partially condense it, then separated to provide a first vapor stream. The first vapor stream is directed into a contacting device whereby vapors and liquids are formed. The liquids are directed to a distillation column operating at lower pressure wherein a second vapor stream is separated to recover a product containing the major portion of the C3 components and heavier hydrocarbon components. The second vapor stream is directed into heat exchange relation with the vapors to cool the second vapor stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the contacting device to intimately contact the first vapor stream; the remaining portion (if any) of the condensed stream can be supplied to the distillation column as its top feed. The quantities and temperatures of the feeds to the contacting device and the distillation column are effective to maintain the overhead temperatures of the contacting device and the distillation column at temperatures whereby the major portion of the desired components is recovered.

A method for volatilising active and/or aroma substances for the purpose of releasing an inhalable aerosol, wherein combustion gases of a flammable gas, which is preferably combusted with an excess of air, are passed partially or entirely, optionally mixed with ambient air, through an active and/or aroma substance depot and wherein a desired temperature is selectable by the proportion of combustion gases and optionally by the mixing ratio of said combustion gases with ambient air and the device implementing the method in the shape and dimensions of a cigarette or cigar for releasing an inhalable aerosol, comprising a mouthpiece (3) containing an active and/or aroma substance depot (32), a heating member (2) with a housing sleeve with one or more air inlets and one or more hot air outlets at the mouthpiece end, a filling valve (21) for filling a gas tank (22) with a flammable gas, preferably propane or butane gas, a regulating valve (24) for the controlled release of the gas from the gas tank (22) to a burner (25) and a mass transfer exchanger (26) for heating the air by the hot combustion gases produced by means of the burner (24), wherein the mouthpiece (3) is detachably connected to the heating member (2) and control of the regulating valve (24) is effected by means of the reduced pressure and/or stream of air generated by a user's suction on the mouthpiece (3). Fuelling station for such a device.

The invention provides a fracturing sand mixing device used for mixing fracturing fluid. The fracturing sand mixing device comprises a solid conveying device and a solid-liquid mixing device communicated with the solid conveying device, wherein the solid-liquid mixing device is a pressure container. The solid-liquid mixing device comprises a solid lead-in port capable of leading in solid particles of the fracturing fluid output by the solid conveying device, a base fluid lead-in port for leading in base fluid of the fracturing fluid, a mixing inner cavity for accommodating the solid particles and the base fluid and a solid-liquid lead-out port for leading out the fracturing fluid formed by mixing. Substances such as carbon dioxide or petroleum gas which are in a gas state under normal temperature can be kept in a liquid state by high pressure through the fracturing sand mixing device and are mixed with the solid particles to form the fracturing fluid, and the goal of preparing the fracturing fluid with liquid carbon dioxide or liquefied petroleum gas (propane) serving as the base fluid is achieved.

A portable heater adapted for use in a recreational enclosure or temporary work enclosure includes a housing having an air inlet on the lower front face. A gas supply is partially enclosed by the housing which provides propane to the mouth of a burner venturi located within the housing. Air is drawn through the air inlet and also enters the mouth of the burner venturi. The air and gas are mixed thoroughly as they travel upwardly through the burner venturi. A chimney effect increases fresh air flow velocity into the burner venturi and allows the heater to operate at a reduced fuel gas pressure. Upon exiting the burner venturi, the air/gas mixture is to a plenum and radiant surface where combustion takes place. Any conventional means may be provided to ignite the air/gas mixture in order to cause combustion. The combustion products deflect off a deflector, which is cooled on a rear face by air flow through the housing, which decreases the temperature of the combustion products before exiting an outlet. An oxygen depletion system (ODS) shuts off the portable heater when oxygen levels begin to drop and consequently carbon monoxide levels begin to rise.

Compositions of matter including articles derived from (a) from 5 to 99.99 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate and (2) contains a at least one residue derived from polyethylene terephthalate selected from the group consisting of antimony, germanium, diethylene glycol groups, isophthalic acid groups, cis isomer of cyclohexane dimethanol, trans isomer of cyclohexane dimethanol, sodium benzoate, alkali salts, napthalane dicarboxylic acids, 1,3-propane diols, cobalt, cobalt-containing compounds, and combinations thereof, and (b) from 0.01 to 95 wt. % of a member selected from the group consisting of (1) fillers, (2) a carboxy reactive component, (3) polyethyelene terephthalate, (4) a component including a polycarbonate and an impact modifier. The articles may be derived from various conversion processes, e.g., injection molding processes, extrusion processes, thermoforming processes, melt-blown process.