公开(公告)号：ES2160383T3

公开(公告)日：2001-11-01

申请号：ES98111263

申请日：1998-06-18

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: B01F23/10 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07B61/00 ,  C07C51/215 ,  C07D307/60 ,  C07C51/25 ,  C07C51/21 ,  C07C57/145 ,  B01F5/04

Abstract: A system provides an oxygen-bearing gas and gaseous reactant stream to a fluidized bed reactor using a sparger to entrain the oxygen-bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and introduces the reactant gas stream and entrained oxygen-bearing gas directly into contact with the fluidized bed. A controller controls and maintains both the amount of oxygen-bearing gas and the gaseous reactant above an upper flammability limit, preferably with a safety margin of at least 10%.

公开(公告)号：ES2158224T3

公开(公告)日：2001-09-01

申请号：ES96120882

申请日：1996-12-26

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN ,  KIRKWOOD DONALD WALTER WELSH ,  KIYONAGA KAZUO

IPC: C07B33/00 ,  C07C57/04 ,  C07C57/145 ,  C07C63/16

Abstract: This invention is directed towards an improved process for the selective gas phase oxidation of a organic reactant using a metal oxide redox catalyst, wherein the organic reactant and air feeds are at a substantially continuous level, the improvement comprising adding a fluctuating flow of oxygen at alternating relatively high and relatively low levels. The invention also teaches means by which a gas may be provided to a reaction process on a fluctuating basis.

公开(公告)号：BR9905929A

公开(公告)日：2000-08-15

申请号：BR9905929

申请日：1999-12-21

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ECHEGARAY DIEGO FERNANDEZ ,  VELOSO ANTONIO AUGUSTO M ,  WAGNER MATTHEW LINCOLN

IPC: C01B21/38 ,  C01B21/26 ,  C01B21/40

Abstract: A process is described for producing nitric acid involving oxidizing ammonia gas to form dinitrogen tetroxide gas, reacting the dinitrogen tetroxide with water in an absorption zone to form aqueous nitric acid and nitric oxide gas, removing a nitric acid/nitric oxide stream from the absorption zone and feeding the stream into a nitric acid bleaching zone, removing impurities from the nitric acid in the bleaching zone to form nitric acid product and adding supplemental oxygen gas to one or more of the reaction streams to increase nitric acid production and or strength. The improvement involves injecting the supplemental oxygen into a nitric acid-containing process stream to form a gas bubble/liquid mixture in the stream, the mixture forming a fine dispersion of gas bubbles having diameters of less than about 0.1 mm. According to the invention, increased interfacial surface is created between the gas bubbles and the liquid mixture to facilitate removal of impurities from the liquid phase and shifting of the reaction.

公开(公告)号：CA2286546A1

公开(公告)日：2000-04-20

申请号：CA2286546

申请日：1999-10-18

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WILLIAMS WILLIAM ROBERT ,  PAPAVASSILIOU VASILIS ,  WAGNER MATTHEW LINCOLN

IPC: B01J10/00 ,  B01J19/00 ,  B01J19/14 ,  C07C45/33

Abstract: The amount of a ballast gas needed, to prevent combustion, deflagration, and/or detonations during a liquid phase reaction of molecular.oxygen and a flammable process liquid, is reduced by using a ballast gas other than nitrogen. The ballast gas is selected to have a boiling point lower than the boiling point of the flammable process liquid and selected to produce a higher limiting oxygen value (LOV) in a mixture with the flammable process liquid vapor and molecular oxygen than the LOV for the corresponding mixture substituting just nitrogen for the inerting gas.

公开(公告)号：ID21809A

公开(公告)日：1999-07-29

申请号：ID980828

申请日：1998-06-04

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: B01F23/10 ,  B01J4/00 ,  C07D307/60 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07B61/00 ,  C07C51/215 ,  B01F15/02

Abstract: A system provides an oxygen-bearing gas and gaseous reactant stream to a fluidized bed reactor using a sparger to entrain the oxygen-bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and introduces the reactant gas stream and entrained oxygen-bearing gas directly into contact with the fluidized bed. A controller controls and maintains both the amount of oxygen-bearing gas and the gaseous reactant above an upper flammability limit, preferably with a safety margin of at least 10%.

公开(公告)号：ID20608A

公开(公告)日：1999-01-28

申请号：ID980918

申请日：1998-06-25

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： PAPAVASSILIOU VASILIS ,  WAGNER MATTHEW LINCOLN ,  DAY ROGER WILLIAM

IPC: C07C67/055 ,  C07D301/08 ,  C07C7/00

Abstract: This invention is directed to a method for producing ethylene oxide comprising feeding ethylene, high purity oxygen and a ballast gas with a recycle gas in a catalyst filled reactor to form a gaseous mixture; passing the gaseous mixture from the reactor to a recovery unit to selectively separate ethylene oxide and carbon dioxide containing gas; passing at least a portion of the carbon dioxide containing gas to a stripping unit to selectively separate carbon dioxide and a waste gas; passing at least a portion of the waste gas to purge and another portion for recycling as the recycle gas; and recovering ethylene oxide from the recovery unit.

公开(公告)号：BR9603551A

公开(公告)日：1998-05-19

申请号：BR9603551

申请日：1996-08-23

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN ,  GILLESPIE MICHELLE EVE ,  BERGMAN THOMAS JOHN JR

IPC: B01F5/04 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07B41/00 ,  C07C253/24 ,  B01J37/14

Abstract: A system provides an oxygen-bearing gas and gaseous reactants to a fluidized bed reactor. Oxygen is introduced into the reactant gas stream by a sparger of a preferred design. A preferred embodiment of the sparger is a circular or closed polygonal annulus with downstream-pointing orifices which issue an oxygen bearing gas into the mixed reactant gas stream. The sparger's orifices are sufficiently separated to prevent a mixing from adjacent orifices of flammable combinations of the oxygen bearing gas and the reactant gas stream. Inner and outer diameters of the sparger annulus are set to assure that approximately equal quantities of the reactant gas stream pass both inside and outside the sparger annulus. Other sparger arrangements are also described.

公开(公告)号：DE602007005132D1

公开(公告)日：2010-04-15

申请号：DE602007005132

申请日：2007-06-26

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN ,  HEIDERMAN DOUGLAS CHARLES

IPC: F17C13/04

Abstract: An apparatus for controlling the discharge of pressurized fluids from the outlet of a high pressure cylinder containing toxic hydridic or flammable compounds is provided. The apparatus contains a cylinder for holding a pressurized fluid in an at least partial gas phase; a cylinder port body threaded to the upper part of the cylinder in a sealed position; a dual port head valve assembly disposed within the cylinder port body, wherein a first port is utilized to fill the cylinder with a pressurized fluid, and a second port in fluid communication with an outlet of the cylinder to discharge the pressurized fluid; a gas flow discharge path defined in part by the second port body and the outlet, and further including a restricted flow path and a flow channel disposed upstream of the second port body, but wherein the gas flow discharge path does not include a restrictive element selected from the group of pressure regulators, check valves and restrictive flow orifices; and the restricted flow path limits the flow rate of the gas discharged from the cylinder to 5,000 sccm when the outlet of the cylinder is exposed to an atmospheric condition.

公开(公告)号：MY116753A

公开(公告)日：2004-03-31

申请号：MYPI9802735

申请日：1998-06-18

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: C07C51/215 ,  B01F23/10 ,  C07D307/60 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07B61/00 ,  C07C51/145 ,  C07C51/25 ,  C07D211/40

Abstract: A SYSTEM PROVIDES AN OXYGEN-BEARING GAS AND GASEOUS REACTANT STREAM TO A FLUIDIZED BED REACTOR USING A SPARGER TO ENTRAIN THE OXYGEN-BEARING GAS INTO THE REACTANT GAS STREAM. A FEED LINE COUPLES THE SPARGER TO THE REACTOR''S FLUIDIZED BED AND INTRODUCES THE REACTANT GAS STREAM AND ENTRAINED OXYGEN-BEARING GAS DIRECTLY INTO CONTACT WITH THE FLUIDIZED BED. A CONTROLLER CONTROLS AND MAINTAINS BOTH THE AMOUNT OF OXYGEN-BEARING GAS AND THE GASEOUS REACTANT ABOVE AN UPPER FLAMMABILITY LIMIT, PREFERABLY WITH A SAFETY MARGIN OF AT LEAST 10

公开(公告)号：MX219037B

公开(公告)日：2004-02-09

申请号：MX9908136

申请日：1999-09-03

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  FRANCIS ARTHUR WELLINGTON ,  WAGNER MATTHEW LINCOLN ,  LEGER CHRISTOPHER BRIAN

IPC: B01F23/10 ,  B01J3/00 ,  B01J3/02 ,  B01J12/00 ,  B01J19/00 ,  B01J19/26 ,  C01B32/40

Abstract: The invention comprises a reactor having a source of a first hot reactant gas, a mixing chamber in which said first hot reactant gas mixes with a second reactant gas to form a reactant gas mixture, but wherein substantially no reaction takes place and a reaction zone wherein said mixture undergoes vapor phase reaction. A process for using the reactor is also disclosed.