Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 5104492 | Recovery of carboxylic acids from water by precipitation from organic solutions Carboxylic acids are recovered from wet organic solutions by reducing the solutions' water content thus causing the acids to precipitate as recoverable crystals.... | 04/14/1992 |
| 5094722 | Process for the purification of a dimethylphenol isomer A purified desired isomer which is either 3,4- or 3,5-dimethylphenol is separated with a high yield from a dimethylphenol-containing fraction which contains both 3,4- and 3,5-dimethylphenols. The fraction is distilled so as to give a distillate which is e... | 03/10/1992 |
| 5028240 | Separation and concentration of lower alcohols from dilute aqueous solutions A process for producing, from a dilute aqueous solution of a lower (C1 -C5) alcohol, a concentrated liquid solution of the alcohol in an aromatic organic solvent is disclosed. Most of the water is removed from the dilute aqueous solu... | 07/02/1991 |
| 5006204 | Apparatus for crystallizing whey An apparatus including an evaporator, a pre-crystallizer, a spray dryer and a fluid bed for drying whey and a rotating disc having a cone-shaped upper surface is provided for receiving partially dried whey from the spray dryer and delivering the whey to t... | 04/09/1991 |
| 5002639 | Separation of ortho-, meta- and para-tolunitrile from ternary mixtures of the isomers A process for the separation of ortho-, meta- and para-tolunitrile from ternary mixtures of isomers entails removing ortho-tolunitrile from these mixtures by distillation under pressures of from 102 and 105 Pa and with a reflux ratio... | 03/26/1991 |
| 4956157 | Process for separating salts in seawater A process for obtaining available elements from seawater is described, which process includes two separation steps. The first separation step involved adjusting the pH of seawater to a low pH by adding a strong acid having sulphate ion, adding a strongly ... | 09/11/1990 |
| 4935101 | Process for the recovery of a water-insoluble epoxy alcohol Water-insoluble crystallizable epoxy alcohols such as phenyl glycidol are recovered from epoxidation reaction mixtures by washing the mixture with water, concentrating the mixture by distillation under vacuum to remove unreacted hydroperoxide and alcohol ... | 06/19/1990 |
| 4915794 | Process for converting internal olefins to alpha olefins This invention relates to a process for producing an olefin product having an enhanced alpha olefin content from an olefin feedstock containing internal olefins or a mixture of internal and alpha olefins which includes: (a) contacting the feedstock with a... | 04/10/1990 |
| 4795535 | Process for the production of alkali metal chlorate At the production of alkali metal chlorate by electrolysis of alkali metal chloride in an electrolyser a part of the liquid phase from the electrolyser is brought to a crystallizer for precipitation of alkali metal chlorate crystals. The hydrogen gas form... | 01/03/1989 |
| 4778568 | Process for separating isomer mixtures of 1,3- and 1,4- bis-(2-hydroxyhexafluoro-prop-2-yl)-benzene Isomer mixtures of 1,3- and 1,4-bis-(2-hydroxyhexafluoroprop-2-yl)-benzene are separated by a steam distillation in the presence of CS2. On cooling of the steam distillate, a solid precipitates which is composed mainly of the 1,4-isomer. After ... | 10/18/1988 |
| 4767503 | Removal of light impurities from caprolactam by distillation with water This invention is a method of purifying crude caprolactam. The improved method comprises taking a portion of a process stream of crude caprolactam having low boiling impurities and distilling the stream in the presence of water by fractional distillation ... | 08/30/1988 |
| 4710215 | Process for distillation-crystallization of zinc carbonate A process for distillation-crystallization of a zinc carbonate which is characterized in that a distillation column having a plurality of plates or trays is used for crystallizing basic zinc carbonate (2ZnCO3.3Zn(OH)2 or ZnCO3.3... | 12/01/1987 |
| 4702798 | Process for recovering dry solids from aqueous solids mixtures A continuous process and apparatus for drying aqueous solids by evaporation using a fluidizing oil and a surfactant wherein the fluidizing oil and surfactant are recovered and recycled separately or together. The aqueous solids may, or may not, have a hea... | 10/27/1987 |
| 4683034 | Process for separating dimethyl isophthalate and dimethyl orthophthalate from their mixture with dimethyl terephthalate The invention relates to a process for separating dimethyl isophthalate (DMI) and dimethyl orthophthalate (DMO) and other by-products from their mixture with dimethyl terephthalate (DMT), formed in the oxidation of p-xylene followed by esterification with... | 07/28/1987 |
| 4662990 | Apparatus for recovering dry solids from aqueous solids mixtures A continuous process and apparatus for drying aqueous solids by evaporation using a fluidizing oil and a surfactant wherein the fluidizing oil and surfactant are recovered and recycled separately or together. The aqueous solids may, or may not, have a hea... | 05/05/1987 |
| 4608127 | Dibenzofuran distillation and crystallization process Separation and recovery of dibenzofuran of high purity is accomplished by distilling a coal tar fraction having boiling point range of 220° to 300° C. thereby producing a dibenzofuran fraction having a dibenzofuran content of not less than 30% by weight... | 08/26/1986 |
| 4578501 | Preparation of terephthalic acid from a crude dimethyl terephthalate A process for the production of a crude dimethyl terephthalate suitable for hydrolyzing into a fiber grade terephthalic acid involves separating a crude ester obtained from the production of dimethyl terephthalate by the Witten process by vacuum distillat... | 03/25/1986 |
| 4420376 | Separation of resorcinol from non-extractable impurities An improved process for recovering high purity resorcinol produced by the rearrangement of m-diisopropylbenzene dihydroperoxide in which the rearranged product mixture is neutralized, the neutralized mixture being filtered, the filtrate being admixed with... | 12/13/1983 |
| 4416734 | Separation of nitroalkanol by azeotropic distillation A process for the separation of a dissolved solid from an aqueous solution containing it, comprising the steps of (a) adding thereto an organic liquid which is a poor solvent for the dissolved solid and which forms an azeotrope with water, (b) subjecting ... | 11/22/1983 |
| 4384924 | Method of separating acids and bases which have been carried along in the vapors formed during distillation A method of separating acids or bases from vapors which are conveyed along with distillation vapors during concentration of a solution, comprising, passing said distillation vapors containing an acid or base, while being maintained at their existing press... | 05/24/1983 |
| 4308110 | Process for separation and purification of dihydric phenols Highly decolorized, purified hydroquinone and resorcinol can be separated from each other from a mixture containing hydroquinone and resorcinol and recovered by continuously rectifying the mixture, thereby obtaining rectification bottoms containing resorc... | 12/29/1981 |
| 4300004 | Process for the preparation of dichlorobenzenes A process for separating ortho-, meta-, and/or para-dichlorobenzene from an isomeric mixture thereof which comprises: A. in a first step, distilling said isomeric mixture to distill over meta- and/or para-dichlorobenzene to leave behind ortho-dichlorobenzene w... | 11/10/1981 |
| 4298622 | Method for producing wheat germ lipid products Wheat germ oil is treated by degumming with phosphoric acid and water, bleaching with activated clay and distilled in a centrifugal molecular still at 140°-200° C. at pressures below 50 milli-torr. The free fatty acids which are removed by the distillat... | 11/03/1981 |
| 4285778 | Process for the manufacture of halogenated hydrocarbons 2,2-Dichloro-5-methyl-1,1,1-trifluorohex-4-ene, an intermediate in the synthesis of pyrethroid insecticides, is obtained by continuous distillation, preferably under sub-atmospheric pressure, of a mixture of 5-methyl-2,2,4-trichloro-1,1,1-trifluorohexane,... | 08/25/1981 |
| 4278503 | Low bromine content glacial acetic acid Excessive energy consumption of a combination of multi-fractionations and multi-distillations of concentrating aqueous acetic acid product of liquid phase oxidations, especially oxidation of liquid n-butane with oxygen gas while the butane is dissolved in... | 07/14/1981 |
| 4211613 | Geothermal mineral extraction system Minerals are recovered from warm geothermal brines by installing a brine eductor device such as a venturi at the end of a thermally insulated drill casing. The geothermal brine is recovered by flowing a warm, low saline carrier solution at high flow rate ... | 07/08/1980 |
| 4191616 | Purification process Alkane dicarboxylic acids of at least 4 carbon atoms particularly the mixture of succinic, glutaric and adipic acids obtained as byproduct in the manufacture of adipic acid are purified by co-distillation with an alkylbenzene having an atmospheric pressur... | 03/04/1980 |
| 4144092 | Process for regenerating a nitric acid-hydrofluoric acid pickling solution In pickling metal, such as iron, steel, special alloys, or the like, aqueous blends containing hydrofluoric acid and nitric acid are used as pickling solutions; resulting spent pickling solutions are evaporated under controlled conditions, such that the c... | 03/13/1979 |
| 4141799 | Process for the purification of high-melting organic products The purification of high-melting organic products, such an anthraquinone and substituted anthraquinones, which is substantially free from lower-boiling impurities, by melting the product to be purified by heating, while mechanically conveying the same alo... | 02/27/1979 |
| 4115460 | Method for producing hexachlorocyclobutene Method for producing hexachlorocyclobutene from hexachlorobutadiene, wherein technical hexachlorobutadiene is rectified at a pressure of 2-10 mm Hg with a reflux ratio of 300-600, and the hexachlorobutadiene remaining in the sump during this procedure, af... | 09/19/1978 |
| 4099936 | Process for the purification of silane A process for the purification of a mixture of silane and impurities comprising passing the mixture through a succession of zones connected in series, in a closed system, according to the following steps: (a) passing the mixture, in gaseous form, through a zon... | 07/11/1978 |
| 4090922 | Carrier-vapor distillation Process for the separation or purification of heat-sensitive compounds by carrier-vapor distillation, wherein the superheated solvent vapor which is loaded with the compound to be distilled is cooled by treatment with condensed solvent in counter-current ... | 05/23/1978 |
| 4026681 | Gas dehydrator process A gas dehydrator system for removing salty water from natural gas, and thereafter subsequently removing the salt and water from the dehydrating agent. The salty water is removed from the gas in a scrubber. The water is then distilled from the dehydrating ... | 05/31/1977 |
| 4009048 | Solvent cleaning and recovery process Vinyl halide polymers are removed from the internal surfaces of reaction equipment with a solvent and the solvent recovered by: (1) contacting the polymer-containing solvent with steam forming a slurry; (2) cooling the slurry to form a crumbly precipitate... | 02/22/1977 |
| 4008255 | Recovery of phthalic anhydride Process for the recovery of phthalic anhydride in which gases as obtained in the catalytic atmospheric oxidation of o-xylene or naphthalene are treated with a hydrocarbon containing C26.sub.- paraffins, cooling, if necessary, the hydrocarbon la... | 02/15/1977 |
| 3988414 | Treatment of waste water from uranium ore preparation An improved closed-loop process is described for treating waste water resulting from chemical extraction of uranium from ore. The water is evaporated to form a concentrated solution and is then subjected to crystallization of the least soluble salt compon... | 10/26/1976 |
