Alkali-metal Or Alkali-metal Compound Containing Patents (Class 252/192)
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Patent number: 4740363Abstract: Alkali is generated from two neutral parts by reacting a complexing agent such as sodium picolinate in one part with a slightly water-soluble metal compound such as zinc oxide in the other part in the presence of water.Type: GrantFiled: July 30, 1986Date of Patent: April 26, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Yoshiharu Yabuki, Kozo Sato
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Patent number: 4590036Abstract: A process for preventing corrosion of metals in contact with an alkaline liquid-acid gas absorbing solution comprises adding to the solution a corrosion inhibiting composition comprising soluble antimony and molybdenum salts in a specified weight ratio. The corrosion inhibiting composition is particularly suited for use with alkaline scrubbing solutions comprising a mixture of an alkali metal salt and an amine.Type: GrantFiled: October 3, 1984Date of Patent: May 20, 1986Assignee: Exxon Research and Engineering Co.Inventor: Z. Andrew Foroulis
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Patent number: 4581209Abstract: 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., K.sub.2 CO.sub.3) and water. These scrubbing compositions may be used for removing CO.sub.2 from gaseous streams containing CO.sub.2.Type: GrantFiled: October 3, 1983Date of Patent: April 8, 1986Assignee: Exxon Research and Engineering Co.Inventors: Alexis A. Oswald, Guido Sartori, David W. Savage, Warren A. Thaler
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Patent number: 4552767Abstract: A carbon dioxide sorbent is disclosed which comprises calcium hydroxide at a level of from 70 to 95% by weight based upon the total dry weight of the sorbent, sodium hydroxide, potassium hydroxide or admixture thereof at a level of from 5 to 15% by weight, optionally calcium chloride at a level of from 5 to 15% by weight and less than 1.5% moisture. Also disclosed is a method for packaging coffee utilizing the carbon dioxide sorbent.Type: GrantFiled: September 27, 1984Date of Patent: November 12, 1985Assignee: General Foods CorporationInventors: Fouad Z. Saleeb, Bary L. Zeller
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Patent number: 4550098Abstract: Methods are disclosed for the purification of mixed gas streams containing hydrogen sulfide, carbon dioxide, carbon monoxide, sulfur, hydrogen, and methane and other hydrocarbon gases, and mixtures thereof, by the use of an oxidizing reactive solid. In one method, the oxidizing reactive solid is, in a first step, contacted with the mixed gas stream which may contain, among other gases, hydrogen sulfide and carbon dioxide. The reactive solid removes the hydrogen sulfide in the form of elemental sulfur with no detectable formation of sulfur oxide. The reactive solid also partially removes the carbon dioxide from the mixed gas stream. In the second step of the first method, the oxidizing reactive solid is regenerated by flowing air. In a second method of the present invention, mixed gas streams, containing hydrogen sulfide and oxygen in an approximate stoichiometric amount, are contacted with the solid, and hydrogen sulfide is converted directly to sulfur with minimal formation of compounds of sulfur.Type: GrantFiled: November 12, 1982Date of Patent: October 29, 1985Assignee: The BOC Group, Inc.Inventor: Theodore A. Gens
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Patent number: 4542000Abstract: A gaseous constituent, such as sulfur dioxide, is removed from a gas stream in a granular bed filter containing granules coated with a sorbent material which is reactive with the gaseous constituent. Granules carrying reacted sorbent material are removed from the granular bed filter, cleaned of reacted sorbent material and coated with further sorbent material for reuse in the granular bed filter. Electrification of the filter bed permits simultaneous, highly efficient removal of particulates entrained in the gas stream.Type: GrantFiled: January 30, 1984Date of Patent: September 17, 1985Assignee: EFB, Inc.Inventors: Jeffery C. Alexander, Karim Zahedi
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Patent number: 4537752Abstract: For the simultaneous absorption and oxidation of hydrogen sulfide, gaseous mixtures substantially free of molecular oxygen are scrubbed in a first stage with an aqueous, alkaline scrubbing agent containing pentavalent vanadium as the oxidizing medium. The hydrogen sulfide is absorbed by the scrubbing agent and oxidized to elemental sulfur with reduction of pentavalent vanadium to tetravalent vanadium. The thus-reduced scrubbing agent is then regenerated in a separate second stage in the presence of an amine promoter by reoxidation of the tetravalent vanadium with molecular oxygen, and reused.Type: GrantFiled: July 17, 1984Date of Patent: August 27, 1985Assignee: Linde AktiengesellschaftInventor: Gunter Weber
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Patent number: 4529574Abstract: A process for removing sulfur oxides from a gas by contacting the gas with an acceptor comprising a lithium doped mixture of magnesium and aluminum oxides. The acceptor reacts with and retains the sulfur oxides. The retained sulfur oxides are then removed from the acceptor by reducing the acceptor through contact with hydrogen. The above process has the advantage of extremely high selectivity for hydrogen sulfide with regard to the effluent produced during the reduction step.Type: GrantFiled: January 30, 1984Date of Patent: July 16, 1985Assignee: UOP Inc.Inventor: Li Wang
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Patent number: 4525294Abstract: 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 group and a ketone to thereby form a mono-substituted amino acid or alkali metal salt thereof, followed by preparing the corresponding sterically hindered tertiary amino acids or alkali metal salt thereof by reacting the mono-substituted amino acids or alkali metal salt thereof with an unhindered aldehyde under reducing conditions in the presence of a hydrogenating catalyst. The novel mixtures of the sterically hindered mono-substituted amino acids and the tertiary amino acids and their alkali metal salts are useful promoters for alkaline salts in "hot pot" acid gas scrubbing processes.Type: GrantFiled: April 14, 1983Date of Patent: June 25, 1985Assignee: Exxon Research and Engineering Co.Inventors: Guido Sartori, Warren A. Thaler
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Patent number: 4518576Abstract: 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 thiosulfate ions. The hydrogen sulfide is converted to sulfur, and the reactant is reduced. The process includes sulfur removal and regeneration of the reactant.Type: GrantFiled: December 20, 1983Date of Patent: May 21, 1985Assignee: Shell Oil CompanyInventor: Zaida Diaz
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Patent number: 4515764Abstract: 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 thiosulfate ions. The hydrogen sulfide is converted to sulfur, and the reactant is reduced. The process includes sulfur removal and regeneration of the reactant.Type: GrantFiled: December 20, 1983Date of Patent: May 7, 1985Assignee: Shell Oil CompanyInventor: Zaida Diaz
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Patent number: 4505776Abstract: A composition is provided which comprises an aqueous alkaline solution of a metal salt and black liquor, the metal salt being selected from the group consisting of iron, chromium, cobalt and nickel salts. This composition is useful in a process described for absorption of hydrogen sulfide from flue gas, followed by subsequent oxidation of dissolved sulfide to thiosulfate, if desired. The presence of the metal ions and black liquor synergistically catalyzes the overall reaction of absorption of hydrogen sulfide, followed by oxidation of the sulfide. Preferably, prior to scrubbing to remove hydrogen sulfide with the solution, the flue gas is first cooled to near its dew point, and then scrubbed with water to remove particulates. Additionally, the effluent flue gas from the absorption step is usefully scrubbed with water to recover heat, following which it is used to scrub condensates from a kraft pulp mill. The metal salt in the solution is preferably an iron salt at a concentration of about 0.002 M.Type: GrantFiled: July 8, 1982Date of Patent: March 19, 1985Assignee: Wescam Services Inc.Inventor: Francis E. Murray
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Patent number: 4499003Abstract: An aqueous corrosion inhibitor composition of soluble antimony and molybdenum salts in which the weight ratio of soluble antimony salt to molybdenum salt ranges between about 0.01 to 1 and about 5 to 1. This corrosion inhibitor is particularly useful in acid gas scrubbing processes, under alkaline conditions, where alkali metal salts and amine compound promoters are used.Type: GrantFiled: February 2, 1982Date of Patent: February 12, 1985Assignee: Exxon Research & Engineering Co.Inventor: Z. Andrew Foroulis
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Patent number: 4470958Abstract: A low melting, eutectic melt salt composition comprising Li.sub.2 CO.sub.3, Na.sub.2 CO.sub.3 and K.sub.2 CO.sub.3, also containing MnCO.sub.3, is disclosed including its use as a melt in the process for the removal of contaminants, e.g., H.sub.2 S, COS and/or fly ash, from gases obtained by partial oxidation/combustion.Type: GrantFiled: September 16, 1982Date of Patent: September 11, 1984Assignee: Shell Oil CompanyInventors: Kees van Gelder, Rene M. Visser, Jan Werner
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Patent number: 4454099Abstract: One or more sorbent bases selected from the group consisting of the alkali and alkaline earth metal oxides, hydoxides, carbonates and bicarbonates are treated with at least one organic halide of the general formula R--X.sub.n where R is an organic radical containing from 1 to about 12 carbon atoms, X is a halogen atom and n has a value from 1 to about 10 to form a sorbent suitable for removing acidic substances from gas mixtures.Type: GrantFiled: May 6, 1982Date of Patent: June 12, 1984Assignee: Phillips Petroleum CompanyInventor: Arlo J. Moffat
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Patent number: 4447561Abstract: Stable water glass solutions are obtained(A) by mixing a solution of an aqueous alkali silicate solution and alkali hydroxide with a tertiary amine and subsequently oxyalkylating the resultant two-phase reaction mixture with at least one alkylene oxide in such an amount that a uniform solution forms or(B) by oxyalkylating a tertiary amine with at least one alkylene oxide and mixing the resultant reaction mixture with a solution of an aqueous alkali silicate solution and alkali hydroxide.The stable water glass solutions are suitable for the preparation of organo silicate foams.For the preparation of the organo silicate foams, a mixture of the stable water glass solutions and tertiary amino group-containing polyether polyols is reacted with organic polyisocyanates in the presence of catalysts, blowing agents and optionally auxiliaries and additives.Type: GrantFiled: July 14, 1983Date of Patent: May 8, 1984Assignee: BASF AktiengesellschaftInventors: Peter Horn, Robert Gehm, Matthias Marx, Artur Roeber
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Patent number: 4444316Abstract: Chlorine-containing gases which may be formed in containers of solid chloroisocyanurates such as trichloroisocyanuric acid are adsorbed and decomposed by a gas scavenging agent consisting essentially of silica gel, an alkali metal bicarbonate, and carbon. The gas scavenger is preferably enclosed in a gas permeable spun-bonded polyolefin envelope. The scavenging agent adsorbs moisture, absorbs and decomposes nitrogen trichloride, removes chlorine, and neutralizes hydrogen chloride formed. The gas scavenging mixture is physically compatible and readily blended while minimizing dusting during packaging operations.Type: GrantFiled: September 3, 1982Date of Patent: April 24, 1984Assignee: Olin CorporationInventor: John M. Casberg
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Patent number: 4430312Abstract: An improved, catalyzed process for the removal of CO.sub.2 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 vanadate equivalent to 2 to 10% by weight of V.sub.2 O.sub.5 and sodium or potassium borate equivalent to 1 to 10% by weight of KBO.sub.2 in which the weight ratio of equivalent KBO.sub.2 to equivalent V.sub.2 O.sub.5 is less than 1.5:1. It has been found that use of the described catalysts permits significant reductions in solution circulation rates (up to 45%), which leads to equipment and utility economies.Type: GrantFiled: June 23, 1982Date of Patent: February 7, 1984Inventor: Allen G. Eickmeyer
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Patent number: 4407723Abstract: The invention disclosed is a novel method of making an improved carbon dioxide absorbing material. A primary carbon dioxide absorbent is employed, specifically a group IA and IIA metal hydroxide, and various combinations of additives which modify the properties of the primary absorbent, in the form of an aqueous solution, and sprayed onto the surface of the primary absorbent.Type: GrantFiled: March 8, 1982Date of Patent: October 4, 1983Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National DefenceInventors: Clive D. R. MacGregor, William G. Forsyth
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Patent number: 4406812Abstract: A composition for deodorizing and rejuvenating used metal working fluids comprising a compound which releases active oxygen, a compound which acts as an alkaline buffering agent and compound which provides an extreme pressure additive. Combinations of sodium perborate and sodium percarbonate are preferred. Additional sequestrants, buffering agents and extenders can also be employed.Type: GrantFiled: December 4, 1980Date of Patent: September 27, 1983Assignee: Chemed CorporationInventor: Jean C. Childers
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Patent number: 4405578Abstract: 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 preferred promoter system comprises a mixture of N-secondary butyl glycine and N-cyclohexyl-1,3-propanediamine or N-cyclohexyl-1, 4-butanediamine.Type: GrantFiled: November 13, 1981Date of Patent: September 20, 1983Assignee: Exxon Research and Engineering Co.Inventors: Guido Sartori, Warren A. Thaler
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Patent number: 4405579Abstract: 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 comprises a mixture of N-secondary butyl glycine and N-methyl-N-secondary butyl glycine.Type: GrantFiled: November 13, 1981Date of Patent: September 20, 1983Assignee: Exxon Research and Engineering Co.Inventors: Guido Sartori, Warren A. Thaler
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Patent number: 4405586Abstract: The present invention relates to an alkaline salt promoter system which includes N-secondary butyl glycine and its use in acid gas scrubbing processes.Type: GrantFiled: November 13, 1981Date of Patent: September 20, 1983Assignee: Exxon Research and Engineering Co.Inventors: Guido Sartori, Warren A. Thaler
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Patent number: 4405584Abstract: An improved method for removing acidic gases from a gas stream containing the acidic gases is disclosed in which a corrosion inhibitor comprising a mixture of salts of antimony and molybdenum is added to an amine promoted alkaline salt scrubbing solution.Type: GrantFiled: February 2, 1982Date of Patent: September 20, 1983Assignee: Exxon Research and Engineering Co.Inventor: Z. Andrew Foroulis
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Patent number: 4405577Abstract: The present invention relates to an alkaline promoter system comprising specific mixtures of nonsterically hindered amino compounds and sterically hindered amino acids and their use in acid gas scrubbing processes. The preferred promoter system comprises a mixture of (i) diethanol amine or 1,6-hexanediamine and (ii) N-secondary butyl glycine or pipecolinic acid.Type: GrantFiled: November 13, 1981Date of Patent: September 20, 1983Assignee: Exxon Research and Engineering Co.Inventors: Guido Sartori, David W. Savage
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Patent number: 4388281Abstract: By separating a noxious-component-containing flue gas into two separate streams, subjecting one of these streams to dry purification and the other to wet purification, and recombining the resulting purified streams, purified flue gas is obtained at a temperature greater than the dew point of remaining corrosive constituents. This makes it possible to disseminate the recombined product through pipes and chimneys without a deleterious effect thereon.The beneficial results are obtained without having to heat the recombined gas stream even though the wet-purification process yields purified gas at a temperature far below that which is desired.Both the dry- and the wet-purification processes are significantly enhanced by incorporating piperazine in treating materials. Sorption agents used in the dry purification are reused in the wet purification, enhancing the efficiency of the disclosed system.Type: GrantFiled: May 22, 1981Date of Patent: June 14, 1983Inventors: Heinz Holter, Heinz Gresch, Heinrich Igelbuscher, Heribert Dewert
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Patent number: 4376102Abstract: Acidic gases containing carbon dioxide are removed from a normally gaseous mixture by absorbing CO.sub.2 from the gaseous mixture with an aqueous solution comprising a basic alkali metal salt or hydroxide and an activator or promoter system for the salt or hydroxide which contains (i) at least one diaminoalcohol of the formula:H.sub.2 N--(CH.sub.2).sub.4 --NRR'wherein R and R' each independently represent a C.sub.1 -C.sub.6 alkyl group and either R or R' or both R and R' have a pendant hydroxyl group, and (ii) an amino acid, and desorbing at least partially the absorbed CO.sub.2 from the aqueous solution.Type: GrantFiled: December 2, 1981Date of Patent: March 8, 1983Assignee: Exxon Research and Engineering Co.Inventors: Warren A. Thaler, Guido Sartori, Chang J. Kim
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Patent number: 4376101Abstract: Acidic gases containing carbon dioxide are removed from a normally gaseous mixture by absorbing CO.sub.2 from the gaseous mixture with an aqueous solution comprising a basic alkali metal salt or hydroxide and an activator or promoter system for the salt or hydroxide which contains (i) at least one non-sterically hindered diamine defined as having both a primary and a tertiary amino moiety wherein the primary amino moiety is attached to a primary carbon atom, and (ii) an amino acid, and desorbing at least partially the absorbed CO.sub.2 from the aqueous solution.Type: GrantFiled: November 13, 1981Date of Patent: March 8, 1983Assignee: Exxon Research and Engineering Co.Inventors: Guido Sartori, Chang J. Kim, Michael T. Melchior, David W. Savage
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Patent number: 4372873Abstract: The corrosion of iron and steel surfaces by an aqueous alkanolamine conditioning solution used to remove CO.sub.2 from a gas stream is effectively inhibited by a combination of a vanadium containing ion and a di- or triamine. A surprising fact is that some of the amine co-inhibitors have been identified by others in the art as promoting ferrous metal corrosion.Type: GrantFiled: March 16, 1981Date of Patent: February 8, 1983Assignee: Texaco Inc.Inventor: Edward C. Y. Nieh
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Patent number: 4371450Abstract: The corrosion of iron and steel surfaces by an aqueous alkanolamine conditioning solution used to remove CO.sub.2 from a gas stream is effectively inhibited by a combination of a vanadium containing ion and a soluble cobalt salt. This system allows the use of higher amine concentrations which in turn allows a higher carbon dioxide loading with low corrosion thereby improving the energy efficiency of the gas sweetening process.Type: GrantFiled: March 12, 1981Date of Patent: February 1, 1983Assignee: Texaco Inc.Inventor: Edward C. Y. Nieh
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Patent number: 4344863Abstract: The foam in acid gas scrubbing solutions created during an acid gas scrubbing process is reduced or eliminated by the addition of certain polyoxyethylene polyoxypropylene block cpolymers as defoaming agents. The defoaming agents are particularly effective when the acid gas scrubbing solution contains an amine having a large hydrophobic moiety.Type: GrantFiled: December 21, 1979Date of Patent: August 17, 1982Assignee: Exxon Research & Engineering Co.Inventors: Max L. Robbins, Edwin R. Ernst
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Patent number: 4343716Abstract: Antifoaming agents for use in acid gas scrubbing processes comprising 1-secondary or 1-tertiary alkyl- or 1-cycloalkyl-hexahydro-2-pyrimidinones and 1-secondary or 1-tertiary alkyl- or 1-cycloalkyl-2-imidazolidinones are disclosed.Type: GrantFiled: June 25, 1979Date of Patent: August 10, 1982Assignee: Exxon Research & Engineering Co.Inventors: Michael T. Melchior, George E. Milliman, Guido Sartori
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Patent number: 4299802Abstract: This invention relates to a process for reducing the carbonyl sulfide content of a gaseous stream which has a concentration of carbonyl sulfide of from at least 1 to about 100 parts per million, by volume, which comprises providing an absorbent bed wherein the absorbent comprises zinc oxide and contains no more than 5%, by weight, of an oxide of an alkli or alkaline earth metal, and contacting said process stream with said adsorbent bed at a temperature of from about ambient to 250.degree. C. for a period of time sufficient to remove at least 90% of the carbonyl sulfide content of said gaseous stream.Type: GrantFiled: March 31, 1980Date of Patent: November 10, 1981Assignee: Union Carbide CorporationInventor: Cyril Tellis
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Patent number: 4277452Abstract: The present disclosure is directed to a carbon monoxide absorbing liquid containing a cuprous ion, hydrochloric acid and titanum trichloride.Titanium trichloride is effective in increasing the carbon monoxide absorption quantity. Furthermore, titanium trichloride remarkably increases the oxygen resistance. Therefore, this absorbing liquid can be used continuously and for a long time.Type: GrantFiled: January 8, 1980Date of Patent: July 7, 1981Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki KaishaInventors: Keiichi Kanehori, Shinkichi Horigome, Masayuki Katsumoto, Yoshijiro Arikawa
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Patent number: 4271133Abstract: This invention relates to a process for reducing the hydrogen cyanide content of a gaseous stream which comprises providing an adsorbent bed wherein the adsorbent comprises zinc oxide and contains no more than 5%, by weight, of an oxide of an alkali or alkaline earth metal, and contacting said process stream with said adsorbent bed at a temperature of from about ambient to about 350.degree. C. for a period of time sufficient to reduce the concentration of hydrogen cyanide in said gaseous stream to the desired value.Type: GrantFiled: March 31, 1980Date of Patent: June 2, 1981Assignee: Union Carbide CorporationInventor: Cyril Tellis
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Patent number: 4268411Abstract: A process for preparing microcapsules comprising a core of highly viscous liquid substance encapsuled with a wall of an aggregate of finely divided silica powder, which comprises adding the highly viscous liquid substance into a powder bed of the finely divided silica powder under stirring with a cutter. The microcapsules thus obtained have such a structure that the core of highly viscous liquid substance is coated with a wall of an aggregate of the finely divided silica powder and a gelatinized layer formed between the wall and the liquid core substance.Type: GrantFiled: March 29, 1979Date of Patent: May 19, 1981Assignee: Pentel Kabushiki KaishaInventors: Masahiro Iwata, Yuichi Taka
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Patent number: 4252778Abstract: A method for removing sulfurous gases such as H.sub.2 S and COS from a fuel gas is disclosed wherein limestone particulates containing iron sulfide provide catalytic absorption of the H.sub.2 S and COS by the limestone. The method is effective at temperatures of 400.degree. C. to 700.degree. C. in particular.Type: GrantFiled: December 21, 1978Date of Patent: February 24, 1981Assignee: The United States of America as represented by the United States Department of EnergyInventors: Ralph T. Yang, Ming-Shing Shen
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Patent number: 4237025Abstract: In the process of removing oxides of sulfur from gases, comprising the step of contacting, at 2.degree.-100.degree. C., components comprising water, calcium ions, and sulfite ions or bisulfite ions to form a sludge, the improvement comprising contacting said components in the presence of dissolved Graham's salt or a dissolved polymer of the formula M.sub.x P.sub.n O.sub.(3n+1) to form a sludge having improved properties, wherein M is a cation, n is a positive integer greater than 1, x is (n+2)/y, and y is the valence of M. Resulting sludge and new composition of matter, comprising lime or limestone mixed with Graham's salt or M.sub.x P.sub.n O.sub.(3n+1), which is useful in performing the process, are also disclosed.Type: GrantFiled: September 25, 1978Date of Patent: December 2, 1980Assignee: Martin Marietta CorporationInventor: Maher E. Tadros
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Patent number: 4233175Abstract: A reagent for treating flue gases constituted by an intimate mixture, in the solid state, of a main component selected from the group comprising alkaline-earth, oxides, hydroxides, carbonates, bicarbonates, and mixtures thereof, and an additive selected from the group comprising hydrogen halide acids, salts of such acids of alkaline metals, ammonium, and alkaline-earth metals, sulphuric acid, and mixtures thereof, said additive being present in an amount of from 0.1 to 15% by mole respect to said main component.Type: GrantFiled: September 1, 1978Date of Patent: November 11, 1980Assignee: UnibraInventors: Bernard Delmon, Ghislain Van Houte
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Patent number: 4230600Abstract: Veneer production from softwood logs is improved by adding at least about 0.003% of urea to the hot water soaking vats prior to peeling the veneer from the logs. Enhanced results are achieved when urea is added together with a base such as sodium hydroxide.Type: GrantFiled: April 7, 1978Date of Patent: October 28, 1980Assignee: Georgia-Pacific CorporationInventor: L. F. Bornstein
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Patent number: 4221697Abstract: Stable, fluid, moldable and curable compositions are described from which may be fabricated composite materials, of improved mechanical properties, comprising an organic polymer matrix and a particulate inorganic reinforcing phase dispersed in and bonded to the matrix. The fluid compositions comprise (A) a polymerizable organic liquid having a viscosity not greater than 50 poise at the molding temperature, (B) inorganic filler particles of defined size constituting at least 20% by volume, and optionally up to 90% by volume, of the total composition, and (C) a defined polymeric dispersant whereby the filler particles are stably dispersed in the polymerizable liquid. The generally low viscosity of the curable compositions enables them to be cast by simple techniques and polymerization of the component (A) yields the above-described composite materials.Type: GrantFiled: January 23, 1978Date of Patent: September 9, 1980Assignee: Imperial Chemical Industries LimitedInventors: Peter G. Osborn, Desmond W. J. Osmond, Barrie J. Thorpe
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Patent number: 4217238Abstract: Acidic components are removed from gaseous mixtures by contacting the gaseous mixture with an aqueous solution comprising (1) a basic salt and (2) an activator for said basic salt comprising at least one sterically hindered amine and an aminoacid which is a cosolvent for the sterically hindered amines. The aminoacid serves to prevent phase separation of the aqueous solution at high temperatures and low fractional conversions during the contacting.Type: GrantFiled: September 22, 1977Date of Patent: August 12, 1980Assignee: Exxon Research & Engineering Co.Inventors: Guido Sartori, David W. Savage
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Patent number: 4217237Abstract: Carbon dioxide containing acidic gases are removed from a normally gaseous mixture by a process comprising contacting the normally gaseous mixture with an aqueous solution comprising (a) a basic alkali metal salt or hydroxide and (b) an activator for said basic salt or alkali metal salt or hydroxide comprising at least one sterically hindered amine.Type: GrantFiled: May 30, 1978Date of Patent: August 12, 1980Assignee: Exxon Research & Engineering Co.Inventors: Guido Sartori, Frederic Leder
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Patent number: 4210460Abstract: A spill of hydrofluoric acid is controlled and cleaned up by being treated with a composition comprising an aqueous solution of calcium acetate and applying to the resulting precipitate an activated composition of powdered magnesia and an appropriate normally solid pH indicator.Type: GrantFiled: October 22, 1975Date of Patent: July 1, 1980Assignee: J. T. Baker Chemical CompanyInventor: James W. Seidenberger
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Patent number: 4201751Abstract: Pulverent solid sorption agent is injected into and, optionally, admixed with a stream of noxious-contaminant-containing gas and then separated from such gas. The solid sorption agent comprises an alkali-metal and/or alkaline-earth-metal compound and advantageously contains iron-III-oxide; such agent is preferably in the form of dust developed during production of iron or steel.Type: GrantFiled: October 21, 1977Date of Patent: May 6, 1980Inventors: Heinz Holter, Heinz Gresch, Heinrich Igelbuscher
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Patent number: 4177158Abstract: A method is disclosed for producing attrition-resistant particles of dolomite or limestone by partially glazing the exterior of the particles with a suitable glaze-forming flux, the resulting composition being useful for removing sulfur dioxide from a combustion gas using the attrition-resistant particles.Type: GrantFiled: February 13, 1978Date of Patent: December 4, 1979Assignee: Chevron Research CompanyInventor: Emanuel M. Blue
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Patent number: 4175053Abstract: Alkyl nitriles in combination with alkali metal hydroxides provide super bases which are useful in various chemical processes.Type: GrantFiled: October 12, 1976Date of Patent: November 20, 1979Assignee: The Procter & Gamble CompanyInventor: Donald J. Peterson
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Patent number: 4174292Abstract: A spill of acid is controlled and cleaned up by being neutralized by a low metal ion fluid neutralizer composition formed of a non-volatile organic amine compound, a foam-forming surfactant and a pH indicator dye and which can additionally contain water, a dissolved gas and color tinting agents. Such a neutralizer composition is especially useful in the electronics manufacturing industry and in clean rooms where the presence of metal ions would be deleterious.Type: GrantFiled: March 20, 1978Date of Patent: November 13, 1979Assignee: J. T. Baker Chemical CompanyInventors: James W. Seidenberger, Francis W. Michelotti
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Patent number: 4166891Abstract: A composition of matter for use in a visual-type instrument which includes a polarizer for a light beam and an analyzer for a light beam, the chemical composition being birefringent at a first relative humidity and nonbirefringent at a second relative humidity.Type: GrantFiled: February 2, 1976Date of Patent: September 4, 1979Inventor: Stanley B. Elliott
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Patent number: H349Abstract: A reagent composition which is chemically inert when solid and is chemica reactive when molten comprises a first substance selected from high molecular weight waxes and polymers and a second substance dissolved, dispersed, or encapsulated in the first substance. The second substance is highly chemically reactive and is selected from strong bases and strong acids. The composition is particularly adapted for use in safety devices automatically activated in response to an increase in the temperature of a chemical system and in processes for automatically discontinuing the operation of or decontaminating the products of a malfunctioning chemical system.Type: GrantFiled: March 12, 1987Date of Patent: October 6, 1987Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Kenneth Krevitz, Louis L. Pytlewski, Charles T. Davey