摘要:
Lignin amines are disclosed which are characterized by high nitrogen content and are water soluble at both alkaline and acidic pH values. The lignin amines have utility as flocculants, filtration aids, precipitants, scale inhibitors, asphalt emulsifiers, fluid loss additives, oil well cement additives, corrosion inhibitors, retention aids, cationic dispersants, and tall oil pitch emulsifiers.
摘要:
Amino-polyacetic acids such as ethylenediaminetetraacetic acid, diethylene triaminepentaacetic acid and nitrilotriacetic acid are reacted with alkanols and then with hydrazine to form the hydrazides which may be converted to carboxyhydrazides, i.e. carbazic acids. The products perform well as chelants and sequestering agents.
摘要:
Amino-polyacetic acids such as ethylenediaminetetraacetic acid, diethylene triaminepentaacetic acid and nitrilotriacetic acid are reacted with alkanols and then with hydrazine to form the hydrazides which may be converted to carboxyhydrazides, i.e. carbazic acids. The products perform well as chelants and sequestering agents.
摘要:
The scale-inhibiting agent used is a combination with a synergistic effect of at least 50% by weight of salified polymers of ethylenic acids, chosen from polymaleates, polyacrylates, polymethacrylates, maleateacrylate copolymers, acrylate-methacrylate copolymers, acrylate-methacrylate-itaconate terpolymers, and mixtures of these substances, and at most 50 wt. % aliphatic polyamines with the formulaR--NH -(CH.sub.2).sub.3 ].sub.n NH.sub.2wherein R represents an aliphatic radical having 12 to 18 carbon atoms and n can be an odd or even whole number between 1 and 6, the percentages being based on polymers and polyamines in the dry state. These percentages are preferably 5 to 15 wt. % aliphatic polyamines per 95 to 85 wt. % polymers.
摘要:
Amino-polyacetic acids such as ethylenediaminetetraacetic acid, diethylene triaminepentaacetic acid and nitrilotriacetic acid are reacted with alkanols and then with hydrazine to form the hydrazides which may be converted to carboxyhydrazides, i.e. carbazic acids. The products perform well as chelants and sequestering agents.
摘要:
Disclosed is a novel copolymer of maleic acid or a salt thereof and an adduct of an oxyalkylene and allyl alcohol, a molar ratio being from 5/100 to 50/50, a molecular weight thereof being from 400 to 20,000. The copolymer is useful as a scale-preventing agent.
摘要:
A method of inhibiting and preventing scale in an aqueous system is described which comprises incorporating in the water at least one amino carboxylate having the formula:RN[--(CH.sub.2).sub.x --Z].sub.2in which x is 1 or 2, R represents --(CH.sub.2).sub.x --Z or --CH.sub.2 CH.sub.2 N[--(CH.sub.2).sub.x --Z].sub.2 and Z represents a --COOH group, or a salt thereof, and at least one water-soluble copolymer possessing recurring units of the formula: ##STR1## wherein R.sub.1 represents hydrogen, lower alkyl or --CH.sub.2 COOH, R.sub.2 represents hydrogen or lower alkyl, X represents --COOH and Z represents hydrogen or --COOH, or X and Z together represent --CO--O--CO--, and Y represents --SO.sub.3 H, --C.sub.6 H.sub.5 SO.sub.3 H (para) or --CONHQ(R.sub.3)(R.sub.4) SO.sub.3 H in which Q represents --CH.sub.2 -- or --CH.sub.2 --CH.sub.2 -- and R.sub.3 and R.sub.4 independently represent hydrogen, phenyl, substituted phenyl, C 1-12 linear or branched alkyl or C 3-12 cycloalkyl, or a salt thereof.
摘要:
A blend of polymers is disclosed which, when used as described, prevents and removes scale on heat transfer surfaces in contact with boiler waters.
摘要:
A random copolymer which consists essentially of a copolymer of (i) acrylic acid or methacrylic acid (together "(meth)acrylic"), (ii) acrylamide or methacrylamide (together "(meth)acrylamide"), and (iii) and alkoxyalkyl (meth)acrylate ester ("AAE") present in specified relative proportions, is soluble in water, and is surprisingly effective in the treatment of industrial process water used in recirculating water systems, particularly with respect to inhibiting the deposition of calcium phosphate on surfaces of equipment used in such systems.
摘要:
The instant invention is directed to a method of recovering oil and/or gas from a subterranean formation which is penetrated by a well bore, and for reducing the concomitant production of reservoir water therefrom comprising injecting into said formation through said well bore an aqueous treating solution or emulsion containing a polyampholyte prepared from:(i) 40 to 90%, by weight, of at least one anionic-containing monomer;(ii) 0.5 to 60%, by weight, of at least one cationic-containing monomer; and(iii) 0 to 59.5%, by weight, of at least one non-ionic monomer.