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3954761 |
Piperazine phosphonic acids
Nitrogen-heterocyclic phosphonic acids and derivatives thereof characterized by aminomethyl (or substituted methyl) phosphonic acids or derivatives thereof bonded directly or indirectly, i.e.,...
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3948792 |
Corrosion and scale softening composition
A method and composition for reducing the amount of and softening silicate scale formation in automobile and diesel coolant systems where a silicate containing anti-corrosion formula is used which...
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3932303 |
Corrosion inhibition with triethanolamine phosphate ester compositions
Use of alkanolamine phosphate ester and at least one member selected from the group consisting of phosphates, phosphonates, and low molecular weight polymers to inhibit the corrosion of metals by...
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3926801 |
Methylene phosphonates of glycidyl reacted polyalkylene polyamines and use in scale and chelation
Methylene phosphonates of glycidyl reacted polyalkylene polyamines and to uses therefor, particularly as scale inhibitors, chelating agents, etc.
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3925453 |
Quaternary aminoalkylene phosphonic acids and method of preparation
Quaternary aminoalkylene phosphonic acids such as N-methyl aminotri(methylene phosphonic acid) of the formula ##EQU1## are prepared by reacting an aminoalkylene phosphonic acid with an alkyl halide...
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3925245 |
Corrosion inhibiting composition containing an aminoalkyl-phosphonic acid and an inorganic nitrite
The present invention relates to a synergistic composition for inhibiting the corrosion of metal surfaces, particularly ferrous metals, in contact with aqueous systems comprising a combination of...
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3925456 |
Cyclic aminophosphonic acids
Cyclic aminophosphonic acids having the formula ##EQU1## wherein R is a member selected from the group consisting of hydrogen and alkyl having from 1 to 6 carbon atoms and n is an integer from 1 to...
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3919297 |
N-(1,1-di-phosphono ethyl) acetamidine, process of making it, and method of using it for preventing scale formation
N-(1,1-Di-phosphono ethyl) acetamidine has proved to be an excellent agent for preventing scale and deposit formation in aqueous systems, even when added in substoichiometric amounts. It is...
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RE28553 |
Method for inhibiting corrosion and mineral deposits in water systems
Addition to a water system a composition comprising a compound having the following formula ##EQU1## wherein X is OH or NH 2 , and R is alkyl radical of 1 to 5 carbon atoms; And a water soluble,...
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3903142 |
Process of producing amino methane diphosphonic acid and its salts
Amino methane diphosphonic acid and its salts are prepared by a simple process and in a high yield by reacting phosphorous acid and a phosphorus trihalogenide, preferably phosphorus trichloride...
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3890228 |
Polyacrylate-polyphosphonic acid treatment in aqueous systems
The invention disclosed relates to the use of combinations of polyacrylates and polymethacrylates with organo-phosphonic acids for the treatment of aqueous systems. The organo-phosphonic acid...
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3867286 |
USE OF POLYQUATERNARY AMMONIUM METHYLENE PHOSPHONATES TO CHELATE OR INHIBIT FORMATION OF SCALE
Polyquaternary ammonium methylene phosphonates and uses thereof, particularly as scale inhibitors, chelating agents, bactericides, etc.
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3723347 |
CORROSION INHIBITION COMPOSITIONS CONTAINING SUBSTITUTED DIAMINE PHOSPHONATES AND PROCESSES FOR USING THE SAME
Substituted diamine phosphonates of the general formula ##SPC1## Wherein R 1 , R 2 , R 3 , R 4 , X, Y and Z are hereinafter defined and n is 0 - 10, alone or in combination with zinc, dichromates,...
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3718603 |
METHODS OF INHIBITING CORROSION WITH SUBSTITUTED TERTIARY AMINE PHOSPHONATES
Substituted tertiary amine phosphonates of the general formula ##SPC1## Wherein R 1 , R 2 , R 3 , R 4 , R 5 , X and Y are hereinafter defined and n is 1 - 20, alone or in combination with zinc,...
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3674804 |
IMIDAZOLINE PHOSPHONIC ACIDS
Nitrogen-heterocyclic phosphonic acids and derivatives thereof characterized by aminomethyl (or substituted methyl) phosphonic acids or derivatives thereof bonded directly or indirectly, i.e.,...
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3671448 |
METHODS OF SCALE INHIBITION USING SUBSTOICHIOMETRIC AMOUNTS OF AMINO ALCOHOL AND PHOSPHONIC ACIDS
The precipitation of scale-forming materials in an aqueous system is inhibited by adding substoichiometric amounts of a precipitation inhibitor which consists of a mixture of an amino alcohol such...
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3666664 |
COMPOSITIONS AND METHODS FOR CONTROLLING SCALE
Compositions and methods used to inhibit scale formation and/or the formation of solid scale forming salts comprises adding to water small amounts of a synergistic combination of nitrilotriacetic...
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3657012 |
PROCESS FOR DECONTAMINATING RADIOACTIVE OBJECTS
A process for decontaminating radioactive objects by washing them in a solution of α-amino (alkane-phosphonic) acid and a tensio-active substance that has been neutralized to a pH from 7 to 7.5...
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3625857 |
OIL SPILL DISPERSANT AND METHOD FOR EMPLOYING SAME
A composition for removing oil spills and a method for employing same is provided wherein the composition comprises from about 80 to 0 weight percent of an anionic surfactant or pine oil and from...
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3620974 |
SCALE INHIBITION
Phosphated hydroxy amines obtained by reacting polyphosphoric acid or phosphorus pentoxide with hydroxyamines, e.g., diethanolamine or triethanolamine, with or without neutralization, are used as...
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3619427 |
METHODS OF SCALE INHIBITION USING POLYALKYLENE POLYAMINO POLYKIS METHYLENE PHOSPHONIC ACIDS AND THEIR SALTS
This invention relates to methods of scale inhibition using polyalkylene polyamino polykis methylene phosphonic acids and their salts.
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3617576 |
METHODS OF SCALE INHIBITION
The precipitation of scale-forming salts in an aqueous system is inhibited by adding either stoichiometric or substoichiometric amounts to said system of an organophosphorus compound which is a...
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3549538 |
SCALE INHIBITION AND REMOVAL IN STEAM GENERATION
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3547817 |
INHIBITION OF SCALE FORMATION
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3542688 |
FLOCCULANT CONSISTING OF THE CONDENSATION PRODUCT OF A POLYHALOGENATED ORGANOPHOSPHATE AND A POLYAMINE
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3536752 |
DIALKALI METAL SALTS OF AMINO TRI(ALKYLIDENEPHOSPHONIC ACIDS)
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3518203 |
CORROSION AND SCALE INHIBITOR COMPOSITIONS AND PROCESSES THEREFOR
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3481869 |
INHIBITING SCALE
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3477956 |
HYDROXYAMINE PHOSPHATE ESTER SCALE INHIBITORS
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3451939 |
THRESHOLD COMPOSITIONS AND METHODS
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3434969 |
SCALE INHIBITING
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3429914 |
ORGANO-PHOSPHONO-AMINE OXIDES
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3405168 |
N-substituted monoamidotriphosphate and processes for their manufacture
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3397149 |
Anti-scale composition
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3393150 |
Methods of scale inhibition
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3385675 |
Dissolving salt containing calcium sulfate in the presence of an aminophosphonic acid
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3336221 |
Method of inhibiting precipitation and scale formation
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3332987 |
Aminoalkylphosphinic acids
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3308161 |
Alkali metal-dimethyl dodecyl amine salts of oxyacids of phosphorous and sulfur
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3296301 |
Nitrogenous organic compounds of phosphorus
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3293176 |
Method of chelating with an ethergroup-containing sequestering agent
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3257479 |
Amino-di-alkylene phosphonic acid esters
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3234124 |
Sequestration of metal ions
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3077487 |
Lower alkylene and lower alkylenephenylene-lower alkylene polyamine bis n, n'-lower alkylene di and tri carboxylic acids, esters, salts, and chelates
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2961311 |
Metal ion control
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2955919 |
Stabilization of phosphoric acid
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2951088 |
Diamino-n, n, n', n'-tetrakis-phosphoric acid derivatives
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3787534 |
Title is not available
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3751371 |
Title is not available
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3663448 |
Title is not available
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