IT1043478B - Removing deposits, esp. calcium sulphate, from heat-exchanger surfaces - with water contg. alpha-hydroxy-acid or salt and surfactant, esp for de-salination plant - Google Patents

Removing deposits, esp. calcium sulphate, from heat-exchanger surfaces - with water contg. alpha-hydroxy-acid or salt and surfactant, esp for de-salination plant

Info

Publication number
IT1043478B
IT1043478B IT2842875A IT2842875A IT1043478B IT 1043478 B IT1043478 B IT 1043478B IT 2842875 A IT2842875 A IT 2842875A IT 2842875 A IT2842875 A IT 2842875A IT 1043478 B IT1043478 B IT 1043478B
Authority
IT
Italy
Prior art keywords
esp
acid
alpha
salt
heat
Prior art date
Application number
IT2842875A
Other languages
Italian (it)
Original Assignee
Grace W R & Co
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
Application filed by Grace W R & Co filed Critical Grace W R & Co
Application granted granted Critical
Publication of IT1043478B publication Critical patent/IT1043478B/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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/042—Prevention of deposits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

Abstract

Deposits contg. CaSO4 are removed from the heat-exchange surfaces of a water evaporator by adding an alpha-hydroxycarboxylic acid (pref. glycolic or citric acid) or a water-sol. salt of this acid, and a nonionic or anionic surfactant to the water which comes into contact with these surfaces. The evaporator is esp. part of a desalination plant for producing drinking water from sea water.
IT2842875A 1974-10-21 1975-10-17 Removing deposits, esp. calcium sulphate, from heat-exchanger surfaces - with water contg. alpha-hydroxy-acid or salt and surfactant, esp for de-salination plant IT1043478B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51683674A 1974-10-21 1974-10-21

Publications (1)

Publication Number Publication Date
IT1043478B true IT1043478B (en) 1980-02-20

Family

ID=24057289

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2842875A IT1043478B (en) 1974-10-21 1975-10-17 Removing deposits, esp. calcium sulphate, from heat-exchanger surfaces - with water contg. alpha-hydroxy-acid or salt and surfactant, esp for de-salination plant

Country Status (3)

Country Link
ES (1) ES441882A1 (en)
IT (1) IT1043478B (en)
NL (1) NL7512198A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975202A (en) * 1989-02-28 1990-12-04 Betz Laboratories, Inc. Surfactant stabilizer and method for boiler water

Also Published As

Publication number Publication date
NL7512198A (en) 1976-04-23
ES441882A1 (en) 1977-04-01

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