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| Number | Title | Issue Date |
| 4853427 | Composition and method to process polymers including ultrahigh molecular weight polyethylene The present invention is a composition and method to process an ultrahigh molecular weight polymer, preferably a vinylic polymer, from about 0.1 to about 25 percent by weight based on the weight of the polymer of a material containing more than one acid g... | 08/01/1989 |
| 4680087 | Etching of dielectric layers with electrons in the presence of sulfur hexafluoride In the manufacture of semiconductor components, direct etching is effected using electrons. In a specific application an electron beam may be used to directly etch a pattern in a dielectric layer in an atmosphere of low pressure sulfur hexafluoride. The t... | 07/14/1987 |
| 4311771 | Process for production of electrical energy from the neutralization of acid and base in a bipolar membrane cell Electrical energy is generated from acid-base neutralization reactions in electrodialytic cells. Permselective bipolar membranes in these cells are contacted on their cation selective faces by aqueous acid streams and on their anion-selective faces by aqu... | 01/19/1982 |
| 4285925 | Process for the conversion of light ash to absorptive low bulk density alkali products A method for production of absorptive particles of Wegscheider's Salt (Na2 CO3.3NaHCO.sub.3) having low bulk density and acceptable flow properties, by reaction of anhydrous sodium carbonate particles with water and carbon dioxide is... | 08/25/1981 |
| 4280553 | System and process for storing energy There is disclosed a process for storing energy by use of the heat of fusion of hydrated salts which are within a bulk container having heat exchange means. The process prevents stratification and supercooling from occurring during the heat releasing cycl... | 07/28/1981 |
| 4219396 | Electrodialytic process An improved process for the electrodialysis of aqueous NaCl which operates at high current efficiency and low unit cell voltage drop to produce high strength, high purity Na2 CO3 and either high purity HCl or CaCl2 by util... | 08/26/1980 |
| 4198277 | Electrolysis of aqueous salt solutions An electrolysis process is disclosed in which catholyte is transferred serially from one cell, in a bank of a plurality of cells, to the cathode compartment of a succeeding cell in the bank. The transfer is accomplished by means of a gas-lift in which gas... | 04/15/1980 |
| 4181587 | Process for producing chlorine and caustic soda A process for producing chlorine and caustic soda is described involving a bank of electrolytic membrane cells arranged for series catholyte flow. Power efficiency is improved by maintaining at least two of the initial cells in the bank in parallel cathol... | 01/01/1980 |
| 4173618 | Process for removal of alumina from aqueous alkali metal chromate solutions Process is provided for removal of alumina from aqueous alkali metal chromate solutions containing the same, which comprises contacting the aqueous solution with a soluble-silica compound under conditions sufficient to effect reaction of alumina with sili... | 11/06/1979 |
| 4171348 | Process for eliminating carbon deposition on sulfur dioxide reduction catalyst in a staged reactor system This invention relates to a process for the prevention of carbonaceous deposits from forming on the surfaces of catalytic materials employed in the reduction of sulfur dioxide in a gas stream with a gaseous reductant to produce elemental sulfur by a proce... | 10/16/1979 |
| 4170535 | Membrane securing device A securing device is disclosed which retains membranes in electrolytic cells during assembly and disassembly thereof and which allows safe, effective storage during disassembly of the cell.... | 10/09/1979 |
| 4156643 | Production of fluorspar having a reduced organic and calcium carbonate content A concentrated calcium fluoride ore, having a decreased foam value which is particularly adapted for the manufacture of hydrogen fluoride is provided by a process which comprises: (a) grinding calcium fluoride ore containing calcite and quartzite particle... | 05/29/1979 |
| 4151261 | Method of preparing sodium liquors low in calcium A method for dissolving calcined trona containing calcareous impurities, to obtain an aqueous sodium carbonate solution having low calcium content involves contacting calcined trona in countercurrent flow, desirably under specific temperature conditions, ... | 04/24/1979 |
| 4131626 | Process for producing bromine A process is described for producing bromine which comprises heating a bromide salt at a temperature of about 500° to 1000° C in the presence of an oxygen-containing gas, silicon dioxide and an oxidation catalyst preferably selected from the group consi... | 12/26/1978 |
| 4129495 | Support structure for plural cell electrolyzer A retaining and restraining support structure for a plural cell electrolyzer is comprised of a sleeper assembly for supporting the electrolyzer cell along its longitudinal dimension, and a tension bar assembly for maintaining each of the cells in a substa... | 12/12/1978 |
| 4115236 | Cell connector for bipolar electrolyzer A cell connector for insuring direct electrical communication and positive mechanical connection with a cell in a bipolar permselective membrane electrolyzer, and which precludes fluid or gaseous flow therefrom, is comprised of an electrically nonconducti... | 09/19/1978 |
| 4112061 | Production of sodium sulfite utilizing mother liquor from the sodium metabisulfite process Anhydrous sodium sulfite is made by a process involving introducing substantially anhydrous sodium carbonate concurrently with impurities-containing mother liquor from which sodium metabisulfite crystals have been crystallized and sulfur dioxide-containin... | 09/05/1978 |
| 4057474 | Electrolytic production of alkali metal hydroxide In the process of making aqueous alkali metal hydroxide solution and diatomic halide gas by electrolysis of aqueous alkali metal halide solution in a bank of cationic permselective membrane cells, current efficiency is improved and/or concentration of the... | 11/08/1977 |
| 4044068 | Process and apparatus for autothermic cracking of ethane to ethylene Process is provided for producing ethylene by the oxidative dehydrogenation ethane wherein a gas containing ethane is passed to a first elongated reaction zone, and a gas mixture containing oxygen and chlorine is passed into a second elongated gas zone po... | 08/23/1977 |
| 4042524 | Methods for absorption heating The invention comprises a novel compound having the chemical name 2-(t-butoxymethyl) tetrahydrofuran and a novel absorption pair comprising 2-(t-butoxymethyl) tetrahydrofuran as the solvent and a lower alkyl fluorocarbon as the solute. The invention furth... | 08/16/1977 |
| 4039618 | Treatment of sodium carbonate crystallizer mother liquors In the process for making sodium carbonate from trona, the soluble silicate content of crystallizer mother liquor from which sodium carbonate precursor crystals are obtained by evaporative crystallization is reduced by digesting the mother liquor at eleva... | 08/02/1977 |
| 4039617 | Recovery of soda values and heat from sodium carbonate crystallizer purge liquors Soda values from the crystallizer purge liquor from the process of making sodium carbonate from trona are recovered by cooling the purge liquor to temperature below about 32° C. to effect crystallization of sodium carbonate decahydrate crystals therefrom... | 08/02/1977 |
| 4039650 | Sulfur dioxide reduction Sulfur dioxide is reduced to sulfur and hydrogen sulfide with a gaseous reducing agent in the presence of a catalyst by a process involving mixing a sulfur dioxide-containing gas stream with a portion of the gaseous reducing agent and passing the resultin... | 08/02/1977 |
| 3991160 | Recovery of soda values from sodium carbonate crystallizer purge liquors Soda values from the crystallizer mother liquor purge in the process of making sodium carbonate from trona are recovered by (1) mixing the purge with treating agent of magnesium oxide, aluminum oxide, bauxite, certain fine particle size calcined trona, in... | 11/09/1976 |
| 3988256 | Photoresist stripper rinse A process for removing a photoresist stripper from a substrate comprising rinsing the substrate with a composition comprising from about 65 to about 98.5 weight percent methylene chloride and from about 1.5 to about 35 weight percent of an alcohol selecte... | 10/26/1976 |
| 3976751 | Stabilization of liquid sulfur trioxide Liquid sulfur trioxide is stabilized against polymerization by incorporating therein a stabilizer combination of a normally liquid siloxane polymer with a methyl ester of an acid of boron.... | 08/24/1976 |
