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4519921 Methods for removing pollutants from water and waste water and for reducing sludge resistance to dewatering
New Patents
II
An apparatus for agitating a fluid that contains a sludge-like material which is stored in an enclosure, such as a pit, storage tank or pond, includes an elongated frame with a motor and a propeller pivotally mounted within a guard at a lower end of the frame, a linkage assembly attached at one end to the motor and the propeller, and a handle pivotally mounted at an upper end of the frame and connected to the other end of the linkage assembly. The motor and propeller are pivotally mounted so that the propeller is pivotable in a generally vertical direction between a first position, generally along the axis of the frame, and a second upward position, angularly displaced from the first position, for directing the agitation caused by the propeller. In addition, the motor and propeller are mounted within the guard so that the propeller is prevented from hitting the floor of the enclosure when the apparatus is rotated about its longitudinal axis.
451!w21 METHODS FOR REMOVING POLLUTANTS FROM WATER AND WASTE WATER AND FOR REDUCING SLUDGE RESISTANCE TO DEWATERING
An environmentally compatible high density drilling or blow-out control fluid is provided wherein densities between twenty-four (24) and forty (40) pounds per gallon can be achieved. Such preferred fluid is aqueous based, uses a non-toxic gelling agent such as fine iron oxide powder, a coarser first weighting material such as fine iron powder, and a second still coarser weighting material such as iron shot, steel shot or mixtures thereof.
4519986 PROCESS FOR PREPARATION OF ULTRAPURE THORIUM FLUORIDE Ricardo Pastor, Remedios Chew assigned to Hughes Aircraft Company
James J Russ, John W Smith, Janet S Condra assigned to Hydro Fuels Inc A method for treating water or waste water to remove pollutants therefrom includes treating fly ash comprising aluminum, iron and silica with an aqueous base, recovering a base-treated, solid fly ash, washing the base-treated solid fly ash with water, recovering a rinsed, base-treated fly ash solid, reacting the rinsed, base-treated fly ash solid with mineral acid, and recovering an aqueous, solubilized acidic fly ash leachate, then mixing the aqueous, acidic solubilized fly ash leachate with water or waste water to remove pollutants therefrom, or with sludge to reduce its resistant to dewatering.
4519922 ENVIRONMENTALLY COMPATIBLE HIGH DENSITY DRILL MUD OR BLOW-OUT CONTROL FLUID David L Sutton, Michael L Walker assigned to Halliburton Company
The specification discloses a process for the preparation of ultrapure thorium fluoride (ThF4) having minimized water content and consequent maximized optical transmission of 10.6 micrometer radiation. First, thorium oxide is reacted with aqueous hydrofluoric a&l to form a solid reaction product, which is then dried under controlled heating to form a hydrated thorium fluoride with a predetermined amount of hydration, namely ThF4.xH20 where x is equal to 0.39. The hydrated thorium fluoride is exposed to a reactive atmosphere of hydrofluoric acid vapor and a selected fluoride compound in the gas phase at elevated temperature for a predetermined period of time. The reactive atmosphere removes substantially alI of the water and water-derived impurities from the hydrated thorium fluoride to produce ultrapure thorium throride which is highly tranar&sive to 10.6 micrometer radiation.
II
An apparatus for agitating a fluid that contains a sludge-like material which is stored in an enclosure, such as a pit, storage tank or pond, includes an elongated frame with a motor and a propeller pivotally mounted within a guard at a lower end of the frame, a linkage assembly attached at one end to the motor and the propeller, and a handle pivotally mounted at an upper end of the frame and connected to the other end of the linkage assembly. The motor and propeller are pivotally mounted so that the propeller is pivotable in a generally vertical direction between a first position, generally along the axis of the frame, and a second upward position, angularly displaced from the first position, for directing the agitation caused by the propeller. In addition, the motor and propeller are mounted within the guard so that the propeller is prevented from hitting the floor of the enclosure when the apparatus is rotated about its longitudinal axis.
451!w21 METHODS FOR REMOVING POLLUTANTS FROM WATER AND WASTE WATER AND FOR REDUCING SLUDGE RESISTANCE TO DEWATERING
An environmentally compatible high density drilling or blow-out control fluid is provided wherein densities between twenty-four (24) and forty (40) pounds per gallon can be achieved. Such preferred fluid is aqueous based, uses a non-toxic gelling agent such as fine iron oxide powder, a coarser first weighting material such as fine iron powder, and a second still coarser weighting material such as iron shot, steel shot or mixtures thereof.
4519986 PROCESS FOR PREPARATION OF ULTRAPURE THORIUM FLUORIDE Ricardo Pastor, Remedios Chew assigned to Hughes Aircraft Company
James J Russ, John W Smith, Janet S Condra assigned to Hydro Fuels Inc A method for treating water or waste water to remove pollutants therefrom includes treating fly ash comprising aluminum, iron and silica with an aqueous base, recovering a base-treated, solid fly ash, washing the base-treated solid fly ash with water, recovering a rinsed, base-treated fly ash solid, reacting the rinsed, base-treated fly ash solid with mineral acid, and recovering an aqueous, solubilized acidic fly ash leachate, then mixing the aqueous, acidic solubilized fly ash leachate with water or waste water to remove pollutants therefrom, or with sludge to reduce its resistant to dewatering.
4519922 ENVIRONMENTALLY COMPATIBLE HIGH DENSITY DRILL MUD OR BLOW-OUT CONTROL FLUID David L Sutton, Michael L Walker assigned to Halliburton Company
The specification discloses a process for the preparation of ultrapure thorium fluoride (ThF4) having minimized water content and consequent maximized optical transmission of 10.6 micrometer radiation. First, thorium oxide is reacted with aqueous hydrofluoric a&l to form a solid reaction product, which is then dried under controlled heating to form a hydrated thorium fluoride with a predetermined amount of hydration, namely ThF4.xH20 where x is equal to 0.39. The hydrated thorium fluoride is exposed to a reactive atmosphere of hydrofluoric acid vapor and a selected fluoride compound in the gas phase at elevated temperature for a predetermined period of time. The reactive atmosphere removes substantially alI of the water and water-derived impurities from the hydrated thorium fluoride to produce ultrapure thorium throride which is highly tranar&sive to 10.6 micrometer radiation.