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"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8221712 | Absorption medium for the selective removal of hydrogen sulfide from fluid streams An absorption medium for the removal of acid gases from a fluid stream comprises an aqueous solution a) of at least one amine and b) at least one phosphonic acid, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The phosphonic acid is, e.g., 1... | 07/17/2012 |
| 7264786 | Method of scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams Hydrogen sulfide and mercaptans may be removed from a fluid or gaseous stream by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger selected from a: (i.) 1,3,5-trisalkanylamino hexahydro-1,3,5-triazine deri... | 09/04/2007 |
| 7252858 | System and method for abating the simultaneous flow of silane and arsine A system and method for abating a simultaneous flow of silane and arsine contained in an exhaust gas of DRAM processing chamber (12). The system includes a CVD abatement apparatus (20) and a resin-type absorber (22). The CVD abatement apparatus ... | 08/07/2007 |
| 7235677 | Method of improving the operation of an existing ethylene oxide manufacturing process and system Described is a method of improving the process and operation of an existing system for manufacturing ethylene oxide. The ethylene oxide manufacturing system includes an epoxidation reactor system containing a volume of high activity epoxidation catalyst. The method ... | 06/26/2007 |
| 7147691 | Acid gas enrichment process The arrangements described herein are based upon a theory of selective absorption of hydrogen sulphide over carbon dioxide from gas based on countercurrent contact between gas and tertiary or other amines which exhibit preferential affinity for H2S over C... | 12/12/2006 |
| 7051540 | Methods for fluid separations, and devices capable of separating fluids Wick-Containing apparatus capable of separating fluids and methods of separating fluids using wicks are disclosed. ... | 05/30/2006 |
| 6187282 | Manufacturing method of lithium complex oxide comprising cobalt or nickel A method of manufacturing a lithium complex oxide involves the steps of 1) atomizing and pyrolyzing an aqueous or alcohol solution of metallic salt compounds constituting a lithium cobalt complex oxide or a lithium nickel complex oxide, and 2) annealing s... | 02/13/2001 |
| 5435977 | Acid gas removal system employing regenerator with internal flash section An acid gas removal process employing a regenerator with an internal flash section is described. The regenerator uses gravitational flow to feed the flash section, eliminating the need for an external flash tank, and charge pump even without vacuum. The i... | 07/25/1995 |
| 5340552 | Reactive matrix for removing impurities from hydride and inert gases and process A macroreticulate polymer is provided for removing water vapor and oxidants from a gas having the formula: ##STR1## wherein Ar is a heteroaromatic moiety, M is bonded to the heteroaromatic moiety and is selected from the group consisting of lithium, ... | 08/23/1994 |
| 5223173 | Method and composition for the removal of hydrogen sulfide from gaseous streams A method of removing hydrogen sulfide from a sour gaseous stream in a contact zone by contacting the sour gaseous stream with a H2 S selective absorbent in an aqueous alkaline solution containing a polyvalent metal chelate at a pH of about 7 to... | 06/29/1993 |
| 5053371 | Catalyst regeneration method with three-zone combustion gas addition A semi-continuous process for combusting coke from catalyst particles in a fixed bed is improved by injecting combustion air for the regeneration section to the three places, upper air to the burn zone, middle air to the chlorination zone and lower air to... | 10/01/1991 |
| 4944917 | Use of thiosulfate salt for corrosion inhibition in acid gas scrubbing processes Disclosed is a method for inhibiting corrosion of metal surfaces in contact with H2 S-containing acid gases streams and aqueous amine scrubbing solutions, which method comprises: contacting the H2 S-containing stream with amine scrub... | 07/31/1990 |
| 4925644 | Partial oxidation of sulfur-containing solid carbonaceous fuel A process for the simultaneous partial oxidation and desulfurization of sulfur and silicate-containing solid carbonaceous fuel for the production of a gas stream comprising gaseous mixtures of H2 and CO and containing less than about 0.05 volum... | 05/15/1990 |
| 4889700 | Process and device for selective extraction of H2 S from an H2 S-containing gas Method and devices for the selective removal of H2 S from an H2 S-containing gas by contacting the gas in an absorption column with an H2 S-selective absorbent liquid and transferring the H2 S-charged absorbent ... | 12/26/1989 |
| 4844876 | Process and device for selective extraction of H2 S from an H2 S-containing gas Method for the selective removal of H2 S from a H2 S-containing gas by operating in a single column (1) comprising an upper absorption zone (11) and a lower regeneration zone (12) separated by a medial enrichment zone (17). A selecti... | 07/04/1989 |
| 4840782 | Gas treating process and composition A process for the removal of H2 S from sour gaseous streams is disclosed, the process being characterized by the use of solutions containing vanadium V-containing ions and phosphate ions in sufficient amount to convert the H2 S to el... | 06/20/1989 |
| 4824443 | Gas separation by composite solvent-swollen membranes There is disclosed a composite immobulized liquid membrane of a solvent-swollen polymer and a microporous organic or inorganic support, the solvent being at least one highly polar solvent containing at least one nitrogen, oxygen, phosphorous or sulfur ato... | 04/25/1989 |
| 4801440 | Partial oxidation of sulfur-containing solid carbonaceous fuel A process for the simultaneous partial oxidation and desulfurization of sulfur and silicate-containing solid carbonaceous fuel for the production of gaseous mixtures comprising H2 and CO and containing less than about 0.05 volume % of H2 | 01/31/1989 |
| 4737166 | Acid gas scrubbing by composite solvent-swollen membranes A composite immobilized liquid membrane suitable for acid gas scrubbing is disclosed. The membrane is a solvent-swollen polymer and a microporous polymeric support, the solvent being selected from a class of highly polar solvents containing at least one a... | 04/12/1988 |
| 4659552 | Scavengers for the removal of impurities from arsine and phosphine Disclosed are macroreticulate polymer scavengers functionalized with arsenic or phosphorus compounds. These scavengers are used for removing oxidants, protic acids and compounds that can be metallated, from arsine and phosphine.... | 04/21/1987 |
| 4581209 | N-aminoalkyl alkylpiperazine promoted acid gas scrubbing process The present invention relates to an alkaline salt promoter system which includes an N-aminoalkyl alkylpiperazine, preferably the compound 1-(3-aminopropyl)-2,5-dimethylpiperazine (APDP), an alkali metal salt or hydroxide (e.g., K2 CO3 | 04/08/1986 |
| 4525294 | Amino acid mixtures, their alkali metal salts and process for preparing same The present invention relates to the preparation of mixtures of sterically hindered substituted N-secondary amino acids or their alkali metal salts by a one-step reductive condensation of an amino acid or its alkali metal salt containing a primary amino g... | 06/25/1985 |
| 4518576 | H2 S Removal from gas streams A cyclic process and composition for the removal of hydrogen sulfide from a variety of gas streams is disclosed. The gas stream containing the sour gases is contacted with a specified reactant solution and a combination crystal modifier of phosphate and t... | 05/21/1985 |
| 4515764 | Removal of H2 S from gaseous streams A cyclic process and composition for the removal of hydrogen sulfide from a variety of gas streams is disclosed. The gas stream containing the sour gases is contacted with a specified reactant solution and a combination crystal modifier of phosphate and t... | 05/07/1985 |
| 4515759 | Process of removing hydrogen sulfide from gas mixtures Process for the removal of hydrogen sulfide from gas mixtures, particular gas mixtures containing hydrocarbons, wherein the gas mixture is treated with an aqueous solution of a water soluble nitrite such as sodium nitrite, the pH of the aqueous solution b... | 05/07/1985 |
| 4479929 | Production of sulfur from a H2 S-bearing gas stream A process for reacting the H2 S in H2 S-bearing gas streams with SO2 in a solvent to produce elemental sulfur, including the steps of oxidizing approximately 1/3 of the H2 S in the stream to SO2, abso... | 10/30/1984 |
| 4471138 | Severely sterically hindered secondary aminoether alcohols A novel class of severely sterically hindered secondary aminoether alcohols of the general formula: ##STR1## are prepared wherein R1 and R2 are each selected from the group consisting of alkyl and hydroxylalkyl radicals R3 | 09/11/1984 |
| 4460554 | Method of removing H2 S from a gas stream utilizing boron-vanadium, quinone solution and iron scavaging composition A process for removing hydrogen sulfide from sour gas streams is disclosed which is carried out in processing equipment which includes steel components resulting in iron from the steel slowly dissolving in the alkaline H2 S absorption medium. T... | 07/17/1984 |
| 4434144 | Absorption of CO2 and/or H2 S utilizing solutions containing two different activators The removal of CO2 and mixtures thereof with H2 S from gaseous mixture containing same, is carried out by using an absorbing solution which comprises a first activating substance chosen from aminoacids and primary and secondary ethan... | 02/28/1984 |
| 4430312 | Removal of CO2 from gas mixtures An improved, catalyzed process for the removal of CO2 from gas mixtures is described using a solution containing 15-40% by weight of potassium carbonate in which the absorption efficiency is enhanced by the addition of sodium or potassium vanad... | 02/07/1984 |
| 4417075 | Di-(Secondary and tertiaryalkylaminoalkoxy)alkanes A novel class of di-secondary aminoethers of the general formula: ##STR1## are disclosed wherein R1 and R8 are each independently selected from the group consisting of primary alkyl having 1 to 8 carbon atoms and primary hydroxy... | 11/22/1983 |
| 4409191 | Integrated cyclic scrubbing and condensate stripping process for the removal of gaseous impurities from gaseous mixtures A process for removing acid gases such as CO2 and H2 S from gas streams using a cyclic aqueous alkaline scrubbing solution which is circulated between an absorption and regeneration stage is disclosed. This process is improved by int... | 10/11/1983 |
| 4405579 | Sterically hindered amino acids and tertiary amino acids as promoters in acid gas scrubbing processes The present invention relates to an alkaline salt promoter system comprising specific mixtures of sterically hindered monosubstituted alpha-amino acids and tertiary amino acids and its use in acid gas scrubbing processes. The preferred promoter system com... | 09/20/1983 |
| 4405578 | Co-promoted acid gas scrubbing solution and process for using same The present invention relates to an alkaline salt promoter system comprising specific mixtures of lower aliphatic mono-substituted alpha amino acids and sterically hindered diamino or triamino compounds and their use in acid gas scrubbing processes. The p... | 09/20/1983 |
| 4399111 | Process for removal of sour gases by scrubbing In the removal of sour gases by scrubbing with an aqueous alkali metal salt solution, e.g. a solution of K2 CO3, the circulating scrubbing liquid is gradually contaminated with organic acids, especially formic acid, which in turn tie... | 08/16/1983 |
| 4376102 | Process for removing acid gases using a basic salt activated with a diaminoalcohol Acidic gases containing carbon dioxide are removed from a normally gaseous mixture by absorbing CO2 from the gaseous mixture with an aqueous solution comprising a basic alkali metal salt or hydroxide and an activator or promoter system for the ... | 03/08/1983 |
| 4376101 | Process for removing acid gases using a basic salt activated with a non-sterically hindered diamine Acidic gases containing carbon dioxide are removed from a normally gaseous mixture by absorbing CO2 from the gaseous mixture with an aqueous solution comprising a basic alkali metal salt or hydroxide and an activator or promoter system for the ... | 03/08/1983 |
| 4330522 | Acid gas separation Acid gases are separated from gaseous streams by the use of absorbents having the formula ##STR1## wherein R1, R2, and R3 are alkyl containing 1 through 4 carbon atoms.... | 05/18/1982 |
| 4292286 | Process for selective removal of cyclic urea from hindered amine gas treating solution A cyclic urea reaction product forms as a by-product of a hindered amine acid gas scrubbing process and results in an ultimate buildup of the material in the circulating amine scrubbing solution. The buildup of this material has a deleterious effect on ac... | 09/29/1981 |
| 4282193 | Process for converting cyclic urea to corresponding diamine in a gas treating system Acidic gases such as carbon dioxide are removed from a gaseous mixture including the acidic component by contacting the gaseous mixture in a scrubbing system with an acid absorbing solution comprising a basic alkali metal compound and an activator, during... | 08/04/1981 |
