WO2000018695A3 - Water treatment - Google Patents

Water treatment Download PDF

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Publication number
WO2000018695A3
WO2000018695A3 PCT/EP1999/007200 EP9907200W WO0018695A3 WO 2000018695 A3 WO2000018695 A3 WO 2000018695A3 EP 9907200 W EP9907200 W EP 9907200W WO 0018695 A3 WO0018695 A3 WO 0018695A3
Authority
WO
WIPO (PCT)
Prior art keywords
water treatment
phosphonates
mixture
days
hours
Prior art date
Application number
PCT/EP1999/007200
Other languages
French (fr)
Other versions
WO2000018695A2 (en
Inventor
Keith Philip Davis
Gordon Findlay Docherty
Gary Woodward
Original Assignee
Albright & Wilson Uk Ltd
Keith Philip Davis
Gordon Findlay Docherty
Gary Woodward
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9821082.6A external-priority patent/GB9821082D0/en
Priority claimed from GBGB9828260.1A external-priority patent/GB9828260D0/en
Application filed by Albright & Wilson Uk Ltd, Keith Philip Davis, Gordon Findlay Docherty, Gary Woodward filed Critical Albright & Wilson Uk Ltd
Priority to AU60880/99A priority Critical patent/AU6088099A/en
Publication of WO2000018695A2 publication Critical patent/WO2000018695A2/en
Publication of WO2000018695A3 publication Critical patent/WO2000018695A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

Ring opened ethanolamine bis methylene phosphonates and their N-oxides obtained by prolonged boiling (eg. 2 hours to 4 days) of the commercially available mixture of closed and open phosphonates at high alkalinity (eg. greater than pH12) are more effective than the original mixture at inhibiting scale in system containing high concentration of alkaline earth metal.
PCT/EP1999/007200 1998-09-30 1999-09-29 Water treatment WO2000018695A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU60880/99A AU6088099A (en) 1998-09-30 1999-09-29 Water treatment

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9821082.6 1998-09-30
GBGB9821082.6A GB9821082D0 (en) 1998-09-30 1998-09-30 Water treatment
GBGB9828260.1A GB9828260D0 (en) 1998-12-23 1998-12-23 Water treatment
GB9828260.1 1998-12-23

Publications (2)

Publication Number Publication Date
WO2000018695A2 WO2000018695A2 (en) 2000-04-06
WO2000018695A3 true WO2000018695A3 (en) 2000-05-25

Family

ID=26314429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/007200 WO2000018695A2 (en) 1998-09-30 1999-09-29 Water treatment

Country Status (2)

Country Link
AU (1) AU6088099A (en)
WO (1) WO2000018695A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0305202D0 (en) * 2003-03-07 2003-04-09 Rhodia Cons Spec Ltd Scale inhibitor
EP1932848A1 (en) * 2006-12-11 2008-06-18 Thermphos Trading GmbH Process for the manufacture of alkylamino alkylene phosphonic acids
GB2455776A (en) * 2007-12-21 2009-06-24 Rhodia Operations Scale inhibition

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019343A (en) * 1989-12-15 1991-05-28 W. R. Grace & Co.-Conn. Control of corrosion in aqueous systems using certain phosphonomethyl amines
EP0437722A1 (en) * 1989-12-15 1991-07-24 W.R. Grace & Co.-Conn. Control of corrosion in aqueous systems using certain phosphonomethyl amine oxides
EP0564248A1 (en) * 1992-03-30 1993-10-06 Calgon Corporation N-(2-hydroxyethyl)-N-bis(methylenephosphonic acid) and corresponding N-oxide thereof for high pH scale control
EP0838538A1 (en) * 1996-10-23 1998-04-29 Nalco Chemical Company Hydroxyimino alkylene phosphonic acids for corrosion and scale inhibition in aqeous systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019343A (en) * 1989-12-15 1991-05-28 W. R. Grace & Co.-Conn. Control of corrosion in aqueous systems using certain phosphonomethyl amines
EP0437722A1 (en) * 1989-12-15 1991-07-24 W.R. Grace & Co.-Conn. Control of corrosion in aqueous systems using certain phosphonomethyl amine oxides
EP0564248A1 (en) * 1992-03-30 1993-10-06 Calgon Corporation N-(2-hydroxyethyl)-N-bis(methylenephosphonic acid) and corresponding N-oxide thereof for high pH scale control
EP0838538A1 (en) * 1996-10-23 1998-04-29 Nalco Chemical Company Hydroxyimino alkylene phosphonic acids for corrosion and scale inhibition in aqeous systems

Also Published As

Publication number Publication date
AU6088099A (en) 2000-04-17
WO2000018695A2 (en) 2000-04-06

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