Abstract: A corrosion- and/or scale inhibitor composition comprising: A) a corrosion- and/or scale inhibitor; and B) a compound having the formula (I): ##STR1## or a water-soluble salt thereof in which R.sub.1 is hydrogen or methyl, the weight ratio of component A) to component B), ranging from 10:90 to 90:10.The compounds of formula I are new compounds.
Abstract: Solid ascorbic acid particles of less than 38 microns in size are shown to be effective antioxidants for substrates in which ascorbic acid is insoluble, such as animal and vegetable oils, essential oils, carotenoids, and the like, at weight concentrations of 0.02% and even at 0.005% or below. These particles are preferably prepared by wet milling ascorbic acid in a medium in which it is insoluble, until the size is less than 38 microns, and preferably less. Employment of such particles in a medium in which they are insoluble, as well as employment in the stabilization of fats, oils, and foods, is demonstrated.
Abstract: A process for preparing microcrystalline perborate hydrate products and highly concentrated, storage stable aqueous solutions used for this purpose which have a stable active oxygen content and a boron content of 3 to 8% by wt. based on the total weight of the solution. The products of the invention are suitable for numerous uses in the field of bleaching agent, disinfectant and liquid detergent formulations, and other fields of use.
Type:
Grant
Filed:
June 3, 1991
Date of Patent:
March 1, 1994
Assignee:
Peroxid-Chemie GmbH
Inventors:
Richard Roesler, Werner Doetsch, Werner Zeiss, Rudolf Siegel
Abstract: A method for neutralizing acidic species and inhibiting the deposition of amine acid salts on the internal surfaces of elevated temperature processing units in a petroleum refinery comprising adding to the hydrocarbon liquid being processed therein a tertiary amine, including trimethylamine and triethylamine.
Abstract: Mixtures of siloxane oligomers having a degree of oligomerization of 0 to 8, which have no more than one vinyl substituent attached per silicon atom as well as methoxy and/or ethoxy groups, the molar ratio of vinyl groups to alkoxy groups being 1:1 to 1:8, and in addition optionally alkyl substituents of 1 to 18 carbon atoms, the molar ratio of vinyl groups to alkyl groups being 1:0 to 1:8, are prepared by hydrolysis or cohydrolysis of vinyltrialkoxysilanes and optionally tetraalkoxysilanes and alkyltrialkoxysilanes in alcoholic solution in the presence of an acid catalyst with an amount of water calculated for the degree of oligomerization, followed by removal of the catalyst and of the free alcohol. The siloxane oligomer mixture is useful as a crosslinking agent for thermoplastic polyolefins.
Abstract: The present invention relates to a composition comprising a antimicrobially effective amount of a combination of an pyrithione and a lipopeptide antibiotic. Also disclosed is an aqueous industrial functional fluid comprising an aqueous base fluid medium and an antimicrobially effective amount of a combination of a pyrithione and a lipopeptide antibiotic. Also disclosed is a process for providing biocidal activity to an aqueous industrial functional fluid which comprises incorporating into said fluid an antimicrobially-effective amount of a combination of a pyrithione and a lipopeptide antibiotic.
Abstract: A process is shown for treating flue or exhaust gases in order to remove sulfur oxides and hydrochloric acids in which calcium hydroxide having a surface area of at least 25 m.sup.
Abstract: A composition of polyalkylenepolyamine derivatives useful as a corrosion inhibitor in aqueous media produced by reacting a starting polyalkylenepolyamine composition comprising a mixture of:(i) at least one C-alkyl-ethylene diamine; and(ii) at least one di-(C-alkyl)-diethylenetriamine;wherein each C-alkyl group on the ethylene diamine and diethylenetriamine independently contain between 8-26 carbon atoms;with a derivatizing agent which is either an alkylating agent or an alkylene oxide. Methods for preparing this composition and using it to inhibit the corrosion of corrodible metal alloys are also disclosed.
Abstract: A method of corrosion inhibition using a gelled inhibitor is disclosed. The method comprises consecutively introducing into an annular region of a jacketed pipeline a hydrogel slurried in an environmentally innocuous oil medium and a corrosion inhibitor dissolved in an aqueous medium. The liquid media are contacted to form a gelled corrosion inhibitor in the annulus. The method is particularly useful in buried pipelines where corrosion monitoring is difficult.
Abstract: A composition for acid gas absorbent comprising:(A): 99.99 to 70 wt % of a polyethylene glycol dimethyl ether composition represented by the following formula:CH.sub.3 O(C.sub.2 H.sub.4 O).sub.n CH.sub.3wherein n is an integer of 1 to 10; and,(B): 0.01 to 30 wt % of a compound containing at least one of an --NH-- group, a phenolic --OH group and an --S-- group in one molecule thereof but free from an alcoholic --OH group, is provided. More particularly, component B may be an amine, preferably a secondary amine, or a phenolic compound.
Type:
Grant
Filed:
April 12, 1991
Date of Patent:
December 28, 1993
Assignees:
Toho Kagaku Kogyo Co., Ltd., State Scientific-Research and Designing Institute for Nitrogen Industry and for Products of Organic Synthesis
Inventors:
Takeshi Hihara, Norio Tagata, Toshimitsu Shimizu, Tetsu Matsuda, Norio Takahashi, Isamu Ueno, Josif L. Leites, Julia G. Carpova, Tatiana V. Zhitkova
Abstract: The present invention provides a method for inhibiting corrosion of carbon steel in contact with a mixture of hydrofluoric acid and tetrahydrothiophene-1,1-dioxide comprising adding a corrosion inhibiting amount of an alkali metal halide to said mixture of hydrofluoric acid and tetrahydrothiophene-1,1-dioxide.
Abstract: Methods are provided for inhibiting the corrosion of iron and iron-containing metals in contact with aqueous systems. Salicylaldoxime is added to cooling water systems to inhibit the corrosion of these metal surfaces.
Abstract: An admixture for inhibiting chloride-induced corrosion in steel reinforcing in place in concrete comprises an O/W emulsion wherein the oil phase comprises an unsaturated fatty acid ester and ethoxylated nonyl phenol and the ester of an aliphatic carboxylic acid with a mono-, di- or trihydric alcohol and the water phase comprises a saturated fatty acid, an amphoteric compound, a glycol and a soap. The admixture is added to the concrete prior to placement.
Type:
Grant
Filed:
December 12, 1991
Date of Patent:
November 16, 1993
Assignee:
Sandoz Ltd.
Inventors:
Gregory S. Bobrowski, Mark A. Bury, Stephen A. Farrington, Charles K. Nmai
Abstract: A low phosphorus process for controlling corrosion in aqueous systems by adding to the aqueous system an effective amount of a composition comprising orthophosphate, azole, polyepoxysuccinic acid and the copolymer of acrylic acid and allyl hydroxypropyl sulfonate ether.
Abstract: Sulfonated alkylphenol is added to crude oil at 5 to 200 ppm to inhibit naphthenic acid corrosion of ferrous metal process piping and equipment in contact with the crude oil at naphthenic acid corrosion conditions. There are disclosed corrosion-inhibited hydrocarbon fluids, an improvement in hot hydrocarbon processing with sulfonated alkylphenol, a method for inhibiting naphthenic acid corrosion therewith, and a method for catalytically processing hydrocarbons with sulfonated alkylphenol to avoid catalyst poisoning by iron compounds.
Abstract: The present invention relates to a composition for use as an agent or concentrate for the preservation of wood and wood materials, which comprises 0.05 to 25% by weight of a 1-aryl-3-hydroxy -3-alkyl-4-(1,2,4-triazol-1-yl)-butane derivative and 0.002-5% by weight of a pyrethroid insecticide comprising cyano-(4-fluoro-3-phenoxyphenyl) -methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate, (.+-.).alpha.-cyano-3-phenoxybenzyl (.+-.)-cis,trans-3-(2,2-dichlorovinyl)-2,2 -dimethylcyclopropanecarboxylate, (S).alpha.-cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropanecarboxylate or 3-phenoxybenzyl (.+-.)-cis,trans-3-(2,2-di-chlorovinyl)-2,2-dimethylcyclopropanecarboxylat e or enantiomeric compounds thereof and more than 40% by weight of a solvent and/or diluent as well as, if appropriate, an organic chemical binder and/or fixing agent, processing aids, dye, pigment, dye mixture or pigment mixture.
Type:
Grant
Filed:
February 28, 1990
Date of Patent:
September 28, 1993
Assignee:
Desowag Materialschutz GmbH
Inventors:
Wolfgang Metzner, Luzian Naczinski, Hans-Werner Wegen
Abstract: Methylpolysiloxanes are disclosed which have quaternary ammonium groups linked to silicon atoms via carbon atoms, wherein the ratio of the number of dimethylsiloxy groups to the number of quaternary ammonium groups has a value of 0.5 to 1.5. The methylpolysiloxanes are useful as corrosion inhibitors for preparations consisting predominantly of water, especially coolants, such as cooling lubricants mixed with water, in an amount of 0.01 to 0.1% by weight, based on the total preparation in the form suitable for use.
Abstract: A method for inhibiting or preventing corrosion of metals in contact with an aqueous system containing dissolved oxygen comprising adding to the system an oxygen scavenger having the formula ##STR1## wherein n is 5 or 6, lactone derivatives thereof, or its water soluble salts, in an amount effective to substantially remove the dissolved oxygen.
Type:
Grant
Filed:
March 2, 1992
Date of Patent:
September 14, 1993
Assignee:
W. R. Grace & Co.-Conn.
Inventors:
Dionisio G. Cuisia, Chih M. Hwa, Murrell L. Salutsky
Abstract: Corrosion inhibitors containing alkanoic, hydrocarbyl dicarboxylic and carbocyclic-substituted, alkanoic acids or salts give high performance, heat transfer fluids and antifreezes, with improved properties including storage stability.
Type:
Grant
Filed:
June 3, 1992
Date of Patent:
September 7, 1993
Assignee:
Texaco Chemical Co.
Inventors:
David L. Miller, Brian L. Benac, John F. Knifton
Abstract: Process for obtaining granular forms of organic and inorganic antiacid additives and tetrakis-[3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionyloxymethyl]-metha ne, carried out in the presence of an amount of the latter in the molten state, homogeneously distributed throughout the powder mass.