Abstract: Poly(vinyl acetate) latex reacted with an aldehyde at acid pH to prepare crosslinked poly(vinyl alcohol) suitable as water-loss agent in drilling fluids.

Abstract: The Hill process for control of post-precipitation in wet process phosphoric acid can be made to work on low-iron phosphate rock, without the need of added perlite or other aluminum silicate.

Abstract: Treatment of sugarcane with 2,2-Dimethylvaleric acid enhances growth.

Abstract: This invention relates to an improved composition for inhibiting deposition of scale in aqueous systems. More specifically, it relates to the use of small quantities of an improved composition for preventing formation of scale and sludge deposits in steam generating boilers. The composition is characterized by the fact that by using a plurality of selected ingredients a synergistic effect is obtained. The ingredients comprise a copolymer of styrene sulfonic acid and maleic anhydride or maleic acid, along with a water soluble organophosphonic acid compound.

Abstract: Wet-process phosphoric acid products substantially free of post precipitation.

Abstract: This invention is directed to an improvement in the Hill phosphoric acid process, whereby the Hill process can be used with high-iron phosphate rock. The improvement involves oxidation of divalent iron in an early stage of the Hill process, followed by addition of a soluble potassium compound to the acid in the crystallizer.

Abstract: Method of pumping viscous liquids, e.g., detergents, using an eductor and a predetermined intermittent cycle.

Abstract: Aeration of Hill phosphoric acid, preferably with perlite, and preferably with a chemical oxidant, e.g., H.sub.2 O.sub.2. Gives good post-precipitation control with high-iron phosphate rock, even in winter conditions.

Abstract: In the Hill phosphoric acid process the crystallizer underflow is divided into a major stream and a minor stream. The major stream goes to the clarifier and the minor stream to the aluminum silicate addition vessel.

Abstract: Improvement in the Hill phosphoric acid process. Fe.sup.++ in high iron feed is oxidized to Fe.sup.+++ to improve post-precipitation characteristics, optionally, a minor stream from the crystallizer is returned to the oxidation zone.

Abstract: A method for boiler water treatment to retard corrosion due to dissolved oxygen. Hydroquinone and certain related compounds are highly effective oxygen scavengers for use in boiler water and thereby effect reduction of corrosion resulting from dissolved oxygen.

Abstract: To a coal-fired furnace that uses electrostatic precipitation or a mechanical collector to collect fly ash, a mix of magnesia-alumina or magnesia-talc is added above the fireball (2600.degree.-3300.degree. F.). The additive increases the mean particle size of the fly ash and reduces its surface resistivity, thereby causing improved collection in the electrostatic precipitators or mechanical collector. Fine particulates containing heavy metals tend to be agglomerated; thus the invention permits recovery of substantial amounts of heavy metal contaminants that would otherwise be lost as stack emission.

Abstract: This invention relates to an improved method for inhibiting deposition of scale in aqueous systems. More specifically, it relates to the use of small quantities of an improved composition for preventing formation of scale and sludge deposits in steam generating boilers. The composition is characterized by the fact that by using a plurality of selected ingredients a synergistic effect is obtained. The ingredients comprise a copolymer of styrene sulfonic acid and maleic anhydride or maleic acid, along with a water soluble organophosphonic acid compound.

Abstract: Prevention of re-post precipitation in concentrated wet process phosphoric acid by heating the acid at 55.degree. to 85.degree. C. thereby to dissolve solids without substantial re-post precipitation.

Abstract: A paste type scouring cleanser containing colloidal magnesium aluminum silicate, alkali, optionally a bleach, zeolite, optionally an abrasive, a surfactant, and optionally sodium hexametaphosphate, all in aqueous dispersion.

Abstract: This invention is directed to improvements in making wet process phosphoric acid substantially free from post-precipitation. The improvements include recycling to the reaction train a side stream produced by the process; cooling one or more of the streams of the process; and/or addition of sulfuric acid to an evaporator.

Abstract: An additive, e. g., MgO.Mg silicate, is injected into the flue gas stream of a coal-or oil-fired furnace, at 2300-1700 deg. F., thereby reducing accumulation of sulfuric acid on the air heater inlet and outlet.

Abstract: Improvement in the reduction of Mg, Ca, Na, K and Al in crude phosphoric acid using an ion exchange resin bed, comprising preclarifying the feed acid with flocculant polymer and placing a filter aid precoat on the resin bed. As part of the preclarification process, a compatible soluble sodium compound, such as sodium carbonate, is added to the feed acid to speed the flocculation process.

Abstract: Dichlorodimethyl hydantoin stabilized for use in alkaline detergent formulations by forming granules or briquettes of a minimum size and hardness.

Abstract: Sucrose yield of sugarcane is increased by treating the cane crop a few weeks prior to harvest with a ripening agent comprising a substituted urea.