Abstract: A method of inhibiting inadvertent and unauthorized writing and reading of information to and from a storage medium comprises the steps of (a) writing a first code in a predetermined location on the storage medium, the first code being indicative of a first protection mode of the storage medium; (b) receiving a command to change the protection mode of the storage medium from the first protection mode to a second protection mode; and, in response to the command, (c) writing in the predetermined location on the storage medium, in place of the first code, a second code indicative of the second protection mode. A protection mode can inhibit writing to the storage medium, both writing and reading to and from the medium, or neither. Changing of protection modes can also be password protected.

Abstract: A method of inhibiting inadvertent and unauthorized writing and reading of information to and from a storage medium comprises the steps of (a) writing a first code in a predetermined location on the storage medium, the first code being indicative of a first protection mode of the storage medium; (b) receiving a command to change the protection mode of the storage medium from the first protection mode to a second protection mode; and, in response to the command, (c) writing in the predetermined location on the storage medium, in place of the first code, a second code indicative of the second protection mode. A protection mode can inhibit writing to the storage medium, both writing and reading to and from the medium, or neither. Changing of protection modes can also be password protected.

Abstract: A method of inhibiting inadvertent and unauthorized writing and reading of information to and from a storage medium comprises the steps of (a) writing a first code in a predetermined location on the storage medium, the first code being indicative of a first protection mode of the storage medium; (b) receiving a command to change the protection mode of the storage medium from the first protection mode to a second protection mode; and, in response to the command, (c) writing in the predetermined location on the storage medium, in place of the first code, a second code indicative of the second protection mode. A protection mode can inhibit writing to the storage medium, both writing and reading to and from the medium, or neither. Changing of protection modes can also be password protected.

Abstract: A method of inhibiting inadvertent and unauthorized writing and reading of information to and from a storage medium comprises the steps of (a) writing a first code in a predetermined location on the storage medium, the first code being indicative of a first protection mode of the storage medium; (b) receiving a command to change the protection mode of the storage medium from the first protection mode to a second protection mode; and, in response to the command, (c) writing in the predetermined location on the storage medium, in place of the first code, a second code indicative of the second protection mode. A protection mode can inhibit writing to the storage medium, both writing and reading to and from the medium, or neither. Changing of protection modes can also be password protected.

Abstract: A low temperature, low pressure process for the production of alcohol by the hydration of olefins. The olefin is contacted with a sulfonated ion-exchange resin in the presence of water and glycol diethyl solvent to hydrate said olefin, preferably propylene, and form from the olefin the corresponding aliphatic, monohydric alcohol. The solvent, a key and novel feature of the invention, at reaction conditions forms two liquid phases, a glycol diether phase and a water phase. The alcohol forms predominanty in the glycol diether phase and to a lesser extent in the water phase, with the products, inclusive of by product either, being distributed between the two phases. The glycol diethyl phase effectively displaces the equilibrium toward higher alcohol production, and the ether by product suppresses the equilibrium and minimizes formation of the ether product.

Abstract: A novel composition, and extraction process for the dehydration of a hydrated aliphatic, monohydric alcohol to produce a fuel grade alcohol. A select group of alkali-metal and alkaline-earth metal salts are added to and dissolved within a low volatility polyhydric alcohol to form a solution, or solvent extractant, and said solvent extractant contacted and dissolved within said aliphatic, monohydric hydrated alcohol, the solvent extractant distilled, condensed, and a dehydrated fuel grade aliphatic monohydric fuel grade alcohol recovered.

Abstract: A method of catalytically converting acrylonitrile and water with a metallic conversion catalyst into pure acrylamide crystals.

Abstract: This invention outlines a process to beneficiate carnallite ores in such a way as to obtain anhydrous MgCl.sub.2 of sufficient purity to be used as feed for an electrolysis cell producing magnesium metal. Commercially acceptable potassium chloride as also recovered. The organic solvents and the anhydrous ammonia used to obtain the beneficiation of these carnallite materials are recovered for recycle in the process.

Abstract: A two-step process for removing boron impurities from aqueous solutions of magnesium chloride which comprises treating these solutions with more than 3 moles of methanol in the presence of an acid catalyst to form trimethyl borate and then removing the trimethyl borate and excess methanol from such solutions by means of distillation and then extracting from the thus-treated solutions any remaining boron compounds by means of a hydrocarbon liquid.The hydrocarbon liquid extraction step may be used prior to the methanol treatment.

Abstract: A method for removing boric acid and salts therefrom from ethylene glycol-magnesium chloride solutions which contain at least 100 ppm of boron which comprises reducing the pH of such solutions below 7 and then adding thereto at least 3 moles of methanol based on the amount of boric acid or salt thereof present in said solution and then subjecting the thus-treated ethylene glycol-magnesium chloride solution to distillation at a temperature sufficient to remove trimethyl borate-methanol therefrom, thereby reducing the level of boron in the starting solution to not more than 35 ppm.

Abstract: In a process of producing anhydrous magnesium chloride of the type comprising:A. Mixing together a magnesium chloride hydrate, said hydrate containing minor amounts of water-soluble sulfate and boron compounds as impurities with diethyl ether of tetraethylene glycol to prepare 0.1-6.0% by weight slurry of MgCl.sub.2 in the diethyl ether of tetraethylene glycol and an azeotropic agent having a boiling point less than the diethyl ether of tetraethylene glycol in a quantity sufficient to remove water from said slurry;the improvement which comprises substituting dibutyl ether of tetraethylene glycol for the diethyl ether of tetraethylene glycol.

Abstract: A method of beneficiating a mixed salt mineral ore containing potassium and magnesium sulfates and/or their hydrates which allows the recovery of anhydrous magnesium chloride and the simultaneous recovery of commercially acceptable potassium sulfate.

Abstract: An anti-foaming agent is added to magnesium chloride containing brine prior to spray drying to produce a spray dried product comprising discrete particles of relatively high bulk density.

Abstract: Anhydrous magnesium chloride may be prepared for magnesium chloride hydrate by the following sequence of process steps:A. mixing together a magnesium chloride hydrate said hydrate containing minor amounts of water soluble sulfate and boron compounds as impurities with diethyl ether of tetraethylene glycol to prepare 0.1 - 6.0% by weight slurry of MgCl.sub.2 in the diethyl ether of tetraethylene glycol and an azeotropic agent having a boiling point less than the diethyl ether of tetraethylene glycol in a quantity sufficient to remove water from said slurry;B. distilling water from said slurry wherein an anhydrous solution of MgCl.sub.2 in diethyl ether of tetraethylene glycol containing the water soluble sulfate and boron compounds as insoluble impurities is formed;C. separating said MgCl.sub.2 solution from the insoluble impurities;D. adding to the MgCl.sub.2 solution about 3.0 moles of ethylene glycol per mole of MgCl.sub.2 present so as to prepare a MgCl.sub.2.3 moles ethylene glycol complex precipitate;E.

Abstract: Pure, high surface area alumina is produced by the reaction of aluminum salts with lower aliphatic epoxides in an aqueous media and is washed with aqueous solutions of ammonia which have a pH of at least 7.

Abstract: A process for the liquid/liquid extraction of aromatic hydrocarbons from organic solvent mixtures containing aromatic and aliphatic hydrocarbons by the use of certain ethers and esters as extractants is disclosed.

Abstract: Magnesium metal is produced by electrolysis of a molten magnesium chloride electrolyte containing fluoride ions, the electrolyte being derived from holding pond brines which are partially deboronated, concentrated, gelled and spray dried in the presence of hydrochloric acid gas to form discrete particles of high density anhydrous magnesium chloride feed material for electrolytic cells.

Abstract: A gelling agent is added to a brine containing magnesium chloride to convert the brine into a gel which is spray dried to produce dried magnesium chloride comprising substantially solid discrete particles of magnesium chloride having bulk densities in the range from about 12 to 45 pounds per cubic foot.

Abstract: Anhydrous magnesium chloride may be prepared from magnesium chloride hydrates by the following sequence of processing steps:1. Dissolving the magnesium chloride hydrate in ethylene glycol to form a magnesium chloride hydrate solution.2. Heating the thus-formed solution to remove all the water therefrom thereby forming a ethylene glycol anhydrous magnesium chloride solution.3. Treating the water-free magnesium chloride-ethylene glycol solution with ammonia to form a magnesium chloride ammonia complex which precipitates from the ethylene glycol.4. Removing the precipitate from the ethylene glycol and washing it with a low boiling solvent for ethylene glycol to remove any ethylene glycol entrained in the precipitate.5. Heating the magnesium chloride ammonia complex to drive off the ammonia which leaves as a finished product completely anhydrous magnesium chloride.

Abstract: Minute amounts of boron present in naturally occurring brines found in oceans, inland seas, salt lakes and the like are removed by treating the brine with an oxide of aluminum.