FR2707672A1 - Composition for the treatment of the internal surfaces of conduits for circulating service liquids, especially conduits of central heating systems - Google Patents

Composition for the treatment of the internal surfaces of conduits for circulating service liquids, especially conduits of central heating systems Download PDF

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Publication number
FR2707672A1
FR2707672A1 FR9308167A FR9308167A FR2707672A1 FR 2707672 A1 FR2707672 A1 FR 2707672A1 FR 9308167 A FR9308167 A FR 9308167A FR 9308167 A FR9308167 A FR 9308167A FR 2707672 A1 FR2707672 A1 FR 2707672A1
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Prior art keywords
conduits
treatment
sodium
composition
internal surfaces
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FR9308167A
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FR2707672B1 (en
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Benhaim Alain
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Detergent Compositions (AREA)

Abstract

Composition intended for the treatment of the internal surfaces of the conduits for circulating service liquid, especially conduits of central heating systems, containing, in per cent by weight: sodium carbonate 10 to 12 % sodium hydroxide 6 to 8 % ammonium bifluoride 0 to 2 % anionic surfactant 12 to 14 % nonionic surfactant 0 to 10 % reaction accelerator 10 to 20 % water 40 to 50 % rn

Description

I La présente invention a pour objet une composition destinée auI The subject of the present invention is a composition intended for

traitement des surfaces internes des conduites à circulation de liquides de service, notamment  treatment of the internal surfaces of pipes for the circulation of service liquids, in particular

des conduites des installations de chauffage central.  central heating system pipes.

On sait les problèmes posés, dans ce type d'installations, de même que dans les installations de production de vapeur d'eau ou d'eau surchauffée, par exemple, par l'entretien et le nettoyage des conduites, qui s'encombrent régulièrement de boues dures à base d'oxydes métalliques et dont la disposition ne permet pas de recourir  We know the problems posed in this type of installation, as well as in installations for producing steam or superheated water, for example, by the maintenance and cleaning of pipes, which regularly become cluttered. hard sludge based on metal oxides and whose arrangement does not allow recourse

à un nettoyage mécanique.mechanical cleaning.

La présente invention a pour but de proposer une composition pour le traitement de ces conduites, permettant de réaliser un ramollissement desdites boues dures favorable à leur élimination, ledit traitement pouvant s'effectuer préalablement à l'opération de détartrage à laquelle il convient d'avoir régulièrement recours dans ce type d'installation. La composition selon l'invention, destinée au traitement des surfaces internes des conduites à circulation de liquides de service, présente l'avantage d'une efficacité éprouvée liée à une manipulation ne nécessitant pas de précautions particulières, compte tenu de sa faible causticité, et elle convient particulièrement aux opérations  The object of the present invention is to propose a composition for the treatment of these pipes, making it possible to soften said hard sludge favorable for their elimination, said treatment being able to be carried out prior to the descaling operation which should be carried out. regularly used in this type of installation. The composition according to the invention, intended for the treatment of the internal surfaces of pipes for the circulation of service liquids, has the advantage of proven efficacy linked to handling which does not require any particular precautions, given its low causticity, and it is particularly suitable for operations

de prédêtartrage.pre-descaling.

La composition selon l'invention se caractérise essentiellement en ce qu'elle renferme, en pourcent en poids: carbonate de sodium 10 à 20 % hydroxyde de sodium o à 8 % bifluorure d'ammonium 0 à 2 % tensio-actif anionique 12 à 14 % tensio-actif non ionique 0 à 10 % accélérateur de réaction 10 à 20 % eau 40 à 50 Le tensio-actif anionique mis en oeuvre dans la composition selon l'invention est avantageusement un sel d'un acide diphényloxyde disulfonique, comme par exemple le dodécyldiphényloxyde disulfonate de sodium commercialisé sous la dénomination "DOWFAX 2A1" par la firme américaine DOW CHEMICAL ou le tétrapropyldiphényloxyde disulfonate de sodium commercialisé sous la dénomination "SURFARON A" par la firme PROTEC. Le tensio-actif non ionique susceptible d'être mis en oeuvre dans la composition selon l'invention est avantageusement un alcool polyéthoxylé tel que ceux commercialisés sous la dénomination "1TRITON" par la firme  The composition according to the invention is essentially characterized in that it contains, in percent by weight: sodium carbonate 10 to 20% sodium hydroxide o to 8% ammonium bifluoride 0 to 2% anionic surfactant 12 to 14 % nonionic surfactant 0 to 10% reaction accelerator 10 to 20% water 40 to 50 The anionic surfactant used in the composition according to the invention is advantageously a salt of a diphenyloxide disulfonic acid, such as for example sodium dodecyldiphenyloxide disulfonate marketed under the name "DOWFAX 2A1" by the American company DOW CHEMICAL or sodium tetrapropyldiphenyloxide disulfonate marketed under the name "SURFARON A" by the company PROTEC. The nonionic surfactant capable of being used in the composition according to the invention is advantageously a polyethoxylated alcohol such as those marketed under the name "1TRITON" by the company

BASF.BASF.

L'accélérateur de réaction mis en oeuvre dans la composition selon l'invention est avantageusement un agent séquestrant qui peut être un sel de l'acide éthylène  The reaction accelerator used in the composition according to the invention is advantageously a sequestering agent which can be a salt of ethylene acid

diamine-tétraacétique (EDTA) ou de l'acide nitrilo-  diamine-tetraacetic acid (EDTA) or nitrilo acid

triacétique, par exemple le nitrilotriacétate de sodium  triacetic, for example sodium nitrilotriacetate

(NTA).(NTA).

La composition selon l'invention, injectée dans les conduites à traiter pendant une durée comprise entre environ 10 et environ 20 jours à raison d'environ 10 % du volume d'eau de l'installation, permet d'obtenir les meilleurs résultats quant au ramollissement des boues dures contenues dans les conduites, dont l'évacuation peut être ensuite effectuée à l'aide d'une vidange rapide de l'installation. L'injection de la composition selon l'invention peut se faire au moyen de pompes raccordées à un bac et à l'installation, la circulation et le mélange des produits qu'elle renferme se faisant par le circulateur existant sur l'installation. Une composition selon l'invention peut, à titre d'exemple, présenter la formulation ci-après, étant entendu que cet exemple ne présente aucun caractère limitatif: Carbonate de sodium 20 kg Hydroxyde de sodium 8 kg Bifluorure d'ammonium 150 g DOWFAX 2 A 1 12 kg NTA 20 kg Eau 40 kg  The composition according to the invention, injected into the pipes to be treated for a period of between approximately 10 and approximately 20 days at a rate of approximately 10% of the volume of water of the installation, makes it possible to obtain the best results as regards the softening of the hard sludge contained in the pipes, the evacuation of which can then be carried out by means of a rapid emptying of the installation. The composition according to the invention can be injected by means of pumps connected to a tank and to the installation, the circulation and mixing of the products which it contains taking place by the circulator existing on the installation. A composition according to the invention may, by way of example, have the formulation below, it being understood that this example has no limiting character: Sodium carbonate 20 kg Sodium hydroxide 8 kg Ammonium bifluoride 150 g DOWFAX 2 A 1 12 kg NTA 20 kg Water 40 kg

Claims (4)

REVENDICATIONS 1) Composition destinée au traitement des surfaces internes des conduites à circulation de liquides de service, notamment des conduites des installations de chauffage central, caractérisée en ce qu'elle renferme, en pourcent en poids: carbonate de sodium 10 à 20 % hydroxyde de sodium 6 à 8 % bifluorure d'ammonium 0 à 2 % tensio-actif anionique 12 à 14 % tensio-actif non ionique 0à &10 % accélérateur de réaction 10 à 20 % eau 40 a 50 %  1) Composition intended for the treatment of the internal surfaces of pipes for circulation of service liquids, in particular pipes of central heating installations, characterized in that it contains, in percent by weight: sodium carbonate 10 to 20% sodium hydroxide 6 to 8% ammonium bifluoride 0 to 2% anionic surfactant 12 to 14% nonionic surfactant 0 to & 10% reaction accelerator 10 to 20% water 40 to 50% 2) Composition selon la revendication 1, caractérisée en ce que l'accélérateur de réaction est un agent séquestrant tel que le nitrilotriacétate de sodium ou2) Composition according to claim 1, characterized in that the reaction accelerator is a sequestering agent such as sodium nitrilotriacetate or un sel de l'acide éthylène diaminetétraaétique.  a salt of diaminetetraaetic ethylene acid. 3) Composition selon la revendication 1 ou la revendication 2 caractérisée en ce que le tensio-actif anionique est un sel d'un acide diphényloxyde disulfonique tel que le dodécyldiphényloxyde disufonate de sodium ou le  3) Composition according to claim 1 or claim 2 characterized in that the anionic surfactant is a salt of a diphenyloxide disulfonic acid such as sodium dodecyldiphenyloxide disufonate or tétrapropyldiphényloxyde disulfonate de sodium.  sodium tetrapropyldiphenyloxide disulfonate. 4) Composition selon l'une quelconque des  4) Composition according to any one of revendications précédentes, caractérisée en ce qu'elle  previous claims, characterized in that it renferme un tensio-actif non ionique choisi dans le groupe  contains a nonionic surfactant chosen from the group formé par les alcools polyéthoxylés.  formed by polyethoxylated alcohols.
FR9308167A 1993-06-30 1993-06-30 Composition for the treatment of the internal surfaces of pipes for the circulation of service liquids, in particular pipes for central heating installations. Expired - Lifetime FR2707672B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9308167A FR2707672B1 (en) 1993-06-30 1993-06-30 Composition for the treatment of the internal surfaces of pipes for the circulation of service liquids, in particular pipes for central heating installations.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9308167A FR2707672B1 (en) 1993-06-30 1993-06-30 Composition for the treatment of the internal surfaces of pipes for the circulation of service liquids, in particular pipes for central heating installations.

Publications (2)

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FR2707672A1 true FR2707672A1 (en) 1995-01-20
FR2707672B1 FR2707672B1 (en) 1996-01-12

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE546277A (en) *
GB869870A (en) * 1959-07-30 1961-06-07 Reddish Chemical Company Ltd Improvements in the cleaning of heat exchangers of the plate type
US3951827A (en) * 1973-12-03 1976-04-20 Borg-Warner Corporation Composition and method for removing insoluble scale deposits from surfaces
JPS58189381A (en) * 1982-04-27 1983-11-05 Teijin Ltd Composition for cleaning metallic surface
EP0131298A2 (en) * 1983-07-11 1985-01-16 Amchem Products, Inc. Pretreatment compositions for metals
US4539134A (en) * 1982-12-02 1985-09-03 Halliburton Company Methods and cleaning compositions for removing organic materials from metallic surfaces
FR2584102A1 (en) * 1985-06-26 1987-01-02 Luddeni Cesar Pretreatment process for softening the polymerised oxides of an internal surface of conduits and of fittings of a plant for circulating a working liquid and composition of the pretreatment solution
US5104501A (en) * 1989-06-13 1992-04-14 Daicel Chemical Industries, Ltd. Electrolytic cleaning method and electrolytic cleaning solution for stamper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE546277A (en) *
GB869870A (en) * 1959-07-30 1961-06-07 Reddish Chemical Company Ltd Improvements in the cleaning of heat exchangers of the plate type
US3951827A (en) * 1973-12-03 1976-04-20 Borg-Warner Corporation Composition and method for removing insoluble scale deposits from surfaces
JPS58189381A (en) * 1982-04-27 1983-11-05 Teijin Ltd Composition for cleaning metallic surface
US4539134A (en) * 1982-12-02 1985-09-03 Halliburton Company Methods and cleaning compositions for removing organic materials from metallic surfaces
EP0131298A2 (en) * 1983-07-11 1985-01-16 Amchem Products, Inc. Pretreatment compositions for metals
FR2584102A1 (en) * 1985-06-26 1987-01-02 Luddeni Cesar Pretreatment process for softening the polymerised oxides of an internal surface of conduits and of fittings of a plant for circulating a working liquid and composition of the pretreatment solution
US5104501A (en) * 1989-06-13 1992-04-14 Daicel Chemical Industries, Ltd. Electrolytic cleaning method and electrolytic cleaning solution for stamper

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 100, no. 22, 28 May 1984, Columbus, Ohio, US; abstract no. 178663q, TEIJIN LTD: "cleaning mixture for metals" page 232; *
CHEMICAL ABSTRACTS, vol. 98, no. 10, 7 March 1983, Columbus, Ohio, US; abstract no. 76485f, MARCANOVA: "Agent for degreasing and cleaning large-sized structures" *
DATABASE WPI Week 8350, Derwent World Patents Index; AN 83-841406 *

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