Tonawanda, NY, United States
Tonawanda, NY, United States

Praxair, Inc. is a industrial gases company. It is the largest industrial gases company in North and South America, and the third-largest worldwide by revenue. Wikipedia.

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Patent
Praxair Inc. | Date: 2017-06-21

The present invention relates to decreasing the amount of diluent needed to convert a heavy oil to a bitumen product that can be transported by pipeline. More specifically, the invention relates to a method and apparatus for partially upgrading heavy oil into a lower viscosity bitumen product.


A system and method for the concurrent condensation of a nitrogen-rich vapor and vaporization of an oxygen-rich liquid in a distillation column based air separation unit is provided. The disclosed system includes a condenser-reboiler heat exchanger located between a lower pressure column and a higher pressure column and configured to condense a nitrogen-rich vapor from the higher pressure column and partially vaporize an oxygen-rich liquid from the lower pressure column. Within the condenser-reboiler heat exchanger, the nitrogen-rich vapor flows in an upward direction such that any non-condensables present in the nitrogen-rich vapor will accumulate proximate the upper portion or top of the condenser-reboiler modules where they can be easily removed through venting by means of a venting apparatus having a plurality of perforated tubes.


Patent
Praxair Inc. | Date: 2017-04-05

A system and method for separating air in an air separation plant is provided. The disclosed systems and methods divert a portion of the compressed, purified air stream to a bypass system configured to selectively produce a higher pressure compressed output stream or a lower pressure compressed output stream. The higher pressure and/or lower pressure compressed output streams are cooled in a main heat exchanger by indirect heat transfer with a plurality of product streams from the air separation plant and then rectified in the distillation column system. A second portion of the compressed, purified air stream is partially cooled in the main heat exchanger and expanding in a turbo-expander to produce power and an exhaust stream which is directed to the distillation column system of the air separation plant where it imparts additional refrigeration generated by the expansion of the compressed air stream in the turbo-expander.


A system and method for producing a liquid hydrocarbon product from a Fischer-Tropsch process using a synthesis gas feed produced in an oxygen transport membrane based reforming reactor. The system and method involve reforming a mixed feed stream comprising natural gas, hydrogen and the Fischer-Tropsch tail gas, in a reforming reactor in the presence of steam, radiant heat from oxygen transport membrane elements and a reforming catalyst to produce a reformed synthesis gas stream comprising hydrogen, carbon monoxide, and unreformed hydrocarbon gas. The reformed synthesis gas stream is further reformed in an oxygen transport membrane based reforming reactor and conditioned to produce a synthesis gas product stream preferably having a H2/CO ratio of from about 1.7 to about 2.2. The synthesis gas product stream is then synthesized using a Fischer Tropsch process to produce the liquid hydrocarbon product and a Fischer-Tropsch tail gas.


A novel composition, system and method thereof for improving beam current during boron ion implantation are provided. The boron ion implant process involves utilizing B2H6, BF3 and H2 at specific ranges of concentrations. The B2H6 is selected to have an ionization cross-section higher than that of the BF3 at an operating arc voltage of an ion source utilized during generation and implantation of active hydrogen ions species. The hydrogen allows higher levels of B2H6 to be introduced into the BF3 without reduction in F ion scavenging. The active boron ions produce an improved beam current characterized by maintaining or increasing the beam current level without incurring degradation of the ion source when compared to a beam current generated from conventional boron precursor materials.


Patent
Praxair Inc. | Date: 2017-03-29

Disclosed are methods and apparatus for forming frozen food products, especially frozen foamed food products wherein the products contain bubbles having a reduced average size preferably in a narrow size range or contain ice crystals having reduced size.


Disclosed is a method of operating a furnace (1) containing a charge to heat the charge, comprising wherein gaseous oxidant (15) comprising 60 vol.% to 85 vol.% oxygen is passed through a heated regenerator and into the furnace, so that the oxidant is heated to emerge from an oxidant port (20) at a temperature of 500C to 1400C, and gaseous fuel is fed into said furnace through two or more fuel ports (21, 22); and the heated oxidant and fuel are combusted in the furnace to produce gaseous hot products of said combustion which heat the charge; and then the flow of oxidant through the regenerator into the furnace is discontinued, and said combustion products are passed into said oxidant port and through and out of said cooled regenerator to heat said regenerator, wherein the temperature of the combustion products that pass out of said regenerator is at least 500C; position of the fuel ports with respect to the oxidant port as well as oxidant and fuel velocities are controlled.


Patent
Praxair Inc. | Date: 2017-01-04

A modified and improved lithium cobalt oxide sputtering target with reduced resistivity is described. Unique modifications to the composition of the lithium cobalt oxide target allow adjustment or fine-tuning of the resistance of the target not previously possible. Incorporation of a controlled amount of one or more conductive materials into the lithium cobalt oxide composition is described alone or in combination with altering the stoichiometric ratio of Li: Co to significantly reduce resistivity and thereby enhance conductivity of the target. The result is a modified sputtering target capable of sputtering lithium-containing thin films that does not exhibit deterioration of their properties by virtue of elevated levels of conductive containing material incorporated into the target.


A protective coating system is described that is characterized by fluid impermeability and a reduced coefficient of friction. The coating system includes a carbide-based thermal spray composition; a low friction layer; and a sealant impregnated into the low friction layer. Unlike conventional materials, the coating systems of the present invention achieve and maintain sealing surfaces, without adversely impacting lubricity, wear resistance and corrosion resistance during the service life of the coated component.


A system and method for producing argon that uses a higher pressure column, a lower pressure column, and an argon column collectively configured to produce nitrogen, oxygen and argon products through the cryogenic separation of air. The present system and method also employs a once through argon condensing assembly that is disposed entirely within the lower pressure column that is configured to condense an argon rich vapor stream from the argon column against the oxygen- enriched liquid from the higher pressure column to produce an argon liquid product. The control system is configured for optimizing the production of argon product by ensuring an even flow split of the oxygen- enriched liquid is distributed to the argon condenser cores and by adjusting the flow rate of the argon removed from the argon condensing assembly to maintain the liquid/vapor balance in the argon condensing assembly within appropriate limits.

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