Abstract: An aqueous liquid aircraft runway deicer composition having minimal catalytic oxidation effect upon carbon-carbon composites which contains between about 20 and about 25 weight % of an alkaline earth metal carboxylate, between about 1 and about 15 weight % of an alkaline earth metal carboxylate, between about 1 and 35 weight % of an aliphatic alcohol, between about 0.01 and about 1 weight % of an alkali metal phosphate, between about 0.01 and about 1 weight % of an alkali metal silicate, and up to about 1% by weight of a triazole. A process for producing such a liquid aircraft runway deicer blends an alkali metal hydroxide, an alkali metal phosphate and an alkali metal silicate in aqueous solution and reacts a carboxylic acid with the hydroxide in the solution to create an alkali metal carboxylate solution at a pH of about 14.2. A minor amount of a triazole is added when the pH is below 15.
Type:
Grant
Filed:
November 26, 2002
Date of Patent:
July 22, 2003
Assignee:
General Atomics International Services Corporation
Inventors:
John O. Moles, John L. Maier, Keith L. Johnson, Susan D. Royer
Abstract: A method is provided for removing an anion from an aqueous liquid, such as a fermentation broth. The aqueous broth is contacted with a water-immiscible ion exchange liquid to extract the anion from the broth. The anion exchange liquid is then back extracted with an aqueous phase, to remove the anion, preferably for other uses.
Type:
Grant
Filed:
August 17, 1992
Date of Patent:
June 30, 1998
Assignee:
General Atomics International Services Corporation
Abstract: Effective and environmentally benign liquid deicing and anti-icing compositions are provided by aqueous solutions of (a) alkali metal acetates, preferably KAc, (b) phosphate ion, e.g., H.sub.3 PO.sub.4 or K.sub.3 PO.sub.4, (c) soluble silicate,, e.g., K.sub.2 SiO.sub.3 or Na.sub.2 SiO.sub.3, (d) aromatic triazole, preferably tolyltriazole, (e) a dye which provides a visible hue, and (f) a compatible surfactant which lowers the surface tension to below about 50 dynes per sq. cm., prevents aggregation of components (a) to (f), and assures excellent dispersion across aircraft surfaces, preferablty octylphenoxypolyethoxy ethylphosphate. These compositions are environmentally safe and are useful in methods for deicing or preventative anti-icing of aircraft that meet AEA, ISO and SAE aviation standards. These compositions remain effective at low temperatures and are non-corrosive to metals used in aircraft construction.
Type:
Grant
Filed:
March 28, 1994
Date of Patent:
July 25, 1995
Assignee:
General Atomics International Services Corporation
Inventors:
Stephen K. Chan, Gale L. Hubred, Harold E. Todd
Abstract: A process is provided for making bulk calcium magnesium acetate in a substantially pure crystalline form. The crystalline CMA contains less than about 0.5% of water soluble impurities.
Type:
Grant
Filed:
February 18, 1992
Date of Patent:
July 4, 1995
Assignee:
General Atomics International Services Corporation
Abstract: Liquid deicing and anti-icing compositions are provided by aqueous solutions of (a) alkali metal acetates, e.g., KAc or NaAc, (b) phosphate ion, e.g., K.sub.3 PO.sub.4, and (c) soluble silicate, e.g., K.sub.2 SiO.sub.3 or Na.sub.2 SiO.sub.3. These compositions are environmentally safe and meet FAA standards for metal corrosion resistance. They are effective at very low temperatures, e.g. -40.degree. F., and provide particularly effective deicing compositions when used in combination with granular CMA.
Type:
Grant
Filed:
January 26, 1993
Date of Patent:
September 27, 1994
Assignee:
General Atomics International Services Corporation
Abstract: Improved deicing compositions are provided which comprise calcium magnesium and potassium acetate containing up to about 50% potassium acetate which have improved melting properties as compared to calcium magnesium acetate deicing compositions.
Type:
Grant
Filed:
April 2, 1991
Date of Patent:
June 15, 1993
Assignee:
General Atomics International Services Corporation
Abstract: A method is provided for removing an anion from an aqueous liquid, such as a fermentation broth. The aqueous broth is contacted with a water-immiscible ion exchange liquid to extract the anion from the broth. The anion exchange liquid is then back extracted with an aqueous phase, to remove the anion, preferably for other uses.
Type:
Grant
Filed:
April 5, 1991
Date of Patent:
November 10, 1992
Assignee:
General Atomics International Services Corporation
Abstract: Compositions which comprises a major amount of an alkaline earth or alkali metal carboxylate, a minor amount of unreacted base and impurities, and an effective anti-staining amount of an organic chelating agent are useful as non-staining deicing compositions for use on airport runways and taxiways. The preferred alkaline earth carboxylate is calcium magnesium acetate and the preferred chelating agent is EDTA. Processes for preparation of such compositions are described.
Type:
Grant
Filed:
February 8, 1991
Date of Patent:
July 21, 1992
Assignee:
General Atomics International Services Corporation