Abstract: Vinyl aromatic monomer polymerization methods utilizing a composition of 2,6-di-tert-butyl-4-methylphenol and a substituted benzoquinonediimide compound are disclosed. Preferably, the composition is employed in an amount of 1 part to 10,000 parts per million parts monomer during distillation of styrene.
Abstract: Methods for controlling the fouling potential of Asiatic clams in aqueous systems are provided. The methods comprise adding to the aqueous system an effective controlling amount of a tetraalkyl phosphonium salt compound. The preferred compound is tri-butyltetradecyl phosphonium chloride.
Type:
Grant
Filed:
October 31, 1994
Date of Patent:
November 21, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
Wilson K. Whitekettle, Joseph C. Petrille, Michael W. Werner
Abstract: A cleaning and passivation treatment for metal surfaces which is essentially phosphate free and resistant to foaming in soft water is disclosed. The treatment solution includes relatively water insoluble surfactants without the use of conventional hydrotropes. The treatment solution includes an aqueous solution of monoethanolamine, boric acid, a non-ionic surfactant having a cloud point below about 25.degree. C. and a hydrotropic coupling agent preferably a combination of caprylic acid and capric acid.
Abstract: A water treatment system including a tank for containing a solid treatment product such as a solid halogen. The water treatment system is adapted to be used in combination with a cooling system wherein treated water is fed to the cooling system through an outlet conduit leading from the tank. Drainage of water from the tank is facilitated by use of an eductor connected to an inlet conduit for the tank whereby water is drained from the tank to the inlet conduit and back to the outlet conduit, and is thereafter conveyed back to the cooling system. Thus, a closed system is formed by the treatment system in combination with an associated cooling system wherein the closed system is substantially environmentally safe in that drainage of the tank outside of the closed system is avoided.
Type:
Grant
Filed:
October 21, 1993
Date of Patent:
November 21, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
J. Steven Clavin, Bradley J. Peters, Henry M. Schrandt
Abstract: A process for the inhibition of corrosion caused by naphthenic acid during the elevated temperature processing of crude oil or the high temperature distillates derived therefrom by use of a treatment comprising a mercaptotriazine compound.
Abstract: Compositions and methods for cleaning aluminum while providing oil splitting and no oxide build-up on the aluminum surface including an alkali metal silicate and a quaternary cationic surfactant in an alkaline aqueous cleaning solution.
Abstract: A method for inhibiting the formation of foam in a papermaking system by adding a foam control composition consisting of a) either a polyoxyethylene-polyoxypropylene fatty alcohol or polyoxyethylene-polyoxypropylene difatty acid and b) oleic diethanolamide.
Abstract: A non-chromate conversion coating for metal surfaces such as aluminum, steel, galvanized steel and zinc-aluminum steel consisting of an aqueous solution of a cationic polymer, an alkaline aqueous silicate and an organofunctional silane.
Type:
Grant
Filed:
October 31, 1994
Date of Patent:
September 19, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
Deborah L. Purnell, Brenda S. Morris, David W. Reichgott
Abstract: A process for measuring the coating weight of a dried-in-place non-chromate polyacrylamide/surfactant based conversion coating is disclosed. An ammonium hexafluorotitanate tracer added to such a conversion coating was found to not adversely affect coating properties. The tracer was found to remain proportional to the polymer matrix when the coating was analyzed by X-ray fluorescence.
Abstract: Methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. These methods comprise adding from 1 to about 10,000 parts per million parts monomer of a combination of a dinitrophenol compound, a hydroxylamine compound and a phenylenediamine compound. Preferably, 2-sec-butyl-4,6-dinitrophenol or 4,6-dinitro-o-cresol are used in combination with bis-(hydroxypropyl)hydroxylamine and N,N' -di-sec-butyl-p-phenylenediamine.
Abstract: A composition for controlling the deposition of scale imparting species on the structural surfaces of steam generating systems comprising the use of a water soluble polymer having the structure ##STR1## wherein R.sub.1 is H or lower (C.sub.1 -C.sub.4) alkyl, R.sub.2 is (CH.sub.2 --CH.sub.2 --O).sub.n, ##STR2## or a mixture of both, and n is an integer of from about 1 to about 40, R.sub.3 is H, lower (C.sub.1 -C.sub.4) alkyl or an acetate. This polymer may also be used in concert with topping agents such as phosphoric acids, phosphonic acids, amines, metal chelating agents and oxygen scavengers.
Type:
Grant
Filed:
June 7, 1994
Date of Patent:
August 29, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
Fu Chen, Keith A. Bair, Scott M. Boyette
Abstract: A method and composition for cleaning aluminum surfaces is disclosed. The surfaces are contacted with a treatment comprising potassium hydroxide, a silicate compound and an alkyl imino acid surfactant.
Abstract: A black, no-rinse conversion coating on metal surfaces is provided. The treatment of a metal such as aluminum or aluminum alloys with a composition of hexavalent chromium, a modified styrene acrylic resin, carbon black thickeners, surfactants and coalescents results in a black no-rinse conversion coating. The black coating provides corrosion resistance and is resistant to gasoline, hot oil and ethylene glycol. The coating solution is particularly effective on complex shapes having closely spaced parts such as automotive radiators or condensers.
Abstract: A method for inhibiting the deposition of zinc, iron, and mixed zinc-iron metals on the metal surfaces of a scrubber system comprising adding to said scrubber system a water soluble polymer having repeat units (a) and (b) of the structure ##STR1## wherein M is a water soluble cation. This invention is particularly effective at inhibiting zinc, iron, and mixed zinc-iron deposition on the metal surfaces of the fan, fan shroud and mist eliminator of the scrubber system.
Abstract: A biocidal composition and method for inhibiting and controlling the growth of the fungus, Trichoderma viride, are disclosed. The composition comprises an amount, effective for the intended purpose of diiodomethyl-p-tolylsulfone and an additional biocidal component. The method comprises administering between about 0.1 to about 200 parts of this combined treatment (based on one million parts of the desired aqueous system) to the particular water containing system for which treatment is desired.
Type:
Grant
Filed:
September 6, 1994
Date of Patent:
July 11, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
Deborah K. Donofrio, Wilson K. Whitekettle
Abstract: Compositions and methods for inhibiting polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. The compositions comprise an oxime compound and a hydroxylamine compound and, alternatively, an oxime compound, a hydroxylamine compound and a phenylenediamine compound. The methods comprise adding either of the compositions to the vinyl aromatic monomer in an amount ranging from 1 to about 10,000 parts per million parts monomer.
Abstract: A method of inhibiting the corrosion of iron-based metallurgies in contact with cooling water systems under severe corrosion inducing conditions comprising adding to said cooling water an aqueous combination of an alcohol, an acid, a fatty imidazoline, and an ethoxylated fatty diamine.
Type:
Grant
Filed:
March 22, 1994
Date of Patent:
June 20, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
J. Michael Brown, Herbert A. Roberts, John J. Herrold
Abstract: A microbial inhibiting composition and method is disclosed. The composition comprises an amount, effective for the intended purpose of 3-iodo-2-propynyl-butyl carbamate and n-alkyl dimethyl benzyl ammonium chloride. The method comprises administering an amount of this combined treatment to the particular water containing system for which treatment is desired.
Type:
Grant
Filed:
January 19, 1994
Date of Patent:
May 16, 1995
Assignee:
Betz Laboratories, Inc.
Inventors:
Deborah K. Donofrio, Wilson K. Whitekettle