Abstract: A process for the preparation of lignocellulosic composite using urea-formaldehyde adhesive is described characterized by treating the lignocellulosic constituents with ammonium-base lignosulfonate prior to pressing to decrease the emission of formaldehyde.
Abstract: A horizontal, Fourdrinier foraminous belt type, countercurrent, high-capacity, cellulose pulp washer is described. The described washer is equipped with a hood positioned over a portion of the belt and over vacuum boxes or receptacles under the upper loop of the belt. The gases and vapors drawn into the vacuum boxes or receptacles with the wash liquid are separated from the liquid in the receptacles and recycled to the hood to control the atmosphere in the hood and maintain the desired pressure differential for operation of the washer.
Abstract: A process is described for clarification of an aqueous liquid by imparting magnetic characteristics to flocculated particles by addition of a ferromagnetic organic composition to the liquid to associate the ferromagnetic composition with the flocculated particles.
Abstract: A process for the separation of a dispersed aqueous or water-miscible liquid from a fluid mixture by addition of a water-soluble, organically-based, ferromagnetic composition to combine with the dispersed liquid and subjecting the fluid mixture to a magnetic field to separate the aqueous or water-miscible liquid.
Abstract: A process is described for clarification of an aqueous liquid by imparting magnetic characteristics to flocculated particles by addition of a ferromagnetic organic composition to the liquid to associate the ferromagnetic composition with the flocculated particles.
Abstract: Lignosulfonate and sulfonated tannin compositions having magnetic properties which may be water soluble and a process for their preparation are described.
Type:
Grant
Filed:
November 7, 1975
Date of Patent:
April 26, 1977
Assignee:
Georgia-Pacific Corporation
Inventors:
William Scott Briggs, Niels J. Kjargaard
Abstract: A process for the preparation of aryl sulfonate-aldehyde condensate compositions having magnetic properties which may be water-soluble and compositions thereof are described.
Abstract: Aminoalkylated hydroxyphenylated lignosulfonate is described. The composition is prepared by reacting a hydroxyphenylated lignosulfonate with a nitrogen compound and an aldehyde.
Abstract: A process for recovery of dissolved mercury salts from aqueous solution is described which involves precipitating the mercury as mercury sulfide and contacting the solution with zinc sulfide particles.
Abstract: An aqueous drilling fluid comprising bentonite, or subbentonite and a water-soluble copolymer of lignosulfonate and a polyacrylate in a sufficient amount to increase the yield of the clay.
Abstract: A process for treatment of a cellulosic paper sheet in which the cellulosic fibers are treated with a polyamine or polyamide and a mixture of wax emulsion, urea-formaldehyde and an aldehyde donor such as a tris nitromethane or an oxazolidine.
Abstract: A ready-to-use phenolic adhesive for the manufacture of plywood containing heat treated spent sulfite liquor solids is described. The spent sulfite liquor solids are heat treated in a dry form until from 20% to 50% of the dry heated solids are insoluble in an aqueous 0.5 molar sodium carbonate solution.
Type:
Grant
Filed:
February 25, 1974
Date of Patent:
May 11, 1976
Assignee:
Georgia-Pacific Corporation
Inventors:
Kenneth A. E. Blackmore, Albert W. Stout, deceased
Abstract: A process for the separation of mannitol from galactitol is disclosed which comprises selectively crystallizing mannitol from an alkanol-water solution of the mixture to which a small amount of a soluble salt of an iron, nickel, or cobalt has been added.
Abstract: A clarification process using a water-soluble lignin-di-epoxide composition as a flocculating agent is described. The lignin-di-epoxide compositions are prepared by cross-linking of lignin with a di-epoxide.