DE3431101A1 - Hydrofluoric-acid-containing aqueous organic acid mixtures, possibly with an addition of inorganic acids and corrosion inhibitors - Google Patents

Hydrofluoric-acid-containing aqueous organic acid mixtures, possibly with an addition of inorganic acids and corrosion inhibitors

Info

Publication number
DE3431101A1
DE3431101A1 DE19843431101 DE3431101A DE3431101A1 DE 3431101 A1 DE3431101 A1 DE 3431101A1 DE 19843431101 DE19843431101 DE 19843431101 DE 3431101 A DE3431101 A DE 3431101A DE 3431101 A1 DE3431101 A1 DE 3431101A1
Authority
DE
Germany
Prior art keywords
acid
dissolve
wells
hydrochloric acid
hydrofluoric
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
DE19843431101
Other languages
German (de)
Other versions
DE3431101C2 (en
Inventor
Hubert F. 6000 Frankfurt Neuhausen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19843431101 priority Critical patent/DE3431101A1/en
Priority to IL76170A priority patent/IL76170A0/en
Publication of DE3431101A1 publication Critical patent/DE3431101A1/en
Application granted granted Critical
Publication of DE3431101C2 publication Critical patent/DE3431101C2/de
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
    • E03B3/08—Obtaining and confining water by means of wells
    • E03B3/15—Keeping wells in good condition, e.g. by cleaning, repairing, regenerating; Maintaining or enlarging the capacity of wells or water-bearing layers
    • 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
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention relates to organic acid solutions, characterised in that, instead of hydrochloric acid, they contain hydrofluoric acid, in order by this means to dissolve so-called "mineralisations" and/or other silicic-acid-containing reaction products in drinking water wells, which is not possible with the acid combinations used hitherto. This is associated with the avoidance of a reducing agent or oxidising agent which have previously been required to dissolve manganese oxide (MnO2), in which case it should be noted that, when reducing agents are used, the COD and BOD5 in the reaction waters subsequently pumped out, that is waste waters after regeneration (from wells), is extraordinarily high. When gravel washing machines made of stainless steel are used, pitting corrosion and stress-crack corrosion do not occur, which cannot be avoided when hydrochloric acid is used. There is no problem in neutralising, during well development, any unconsumed hydrofluoric acid via a simple calcium compound (CaO, Ca(OH)2 etc.), absolutely harmless calcium fluoride precipitating out.

Description

[CHWORT3 ΡΕΪ21 BEREICH:FL-FA2 ϊ- - * MOlirf^ * :;2iii&,14sl4 PR VEROO ί FORMAT; -''Il " "m "" "*s* : [CHWORT3 ΡΕΪ21 AREA: FL-FA2 ϊ- - * ^ * MOlirf:; 2iii &, 14sl4 PR VEROO ί FORMAT; - '' Il "" m "" "* s * :

Hubert F= Neuhausen, Uächtersbacher Str. 4, 6000 Frankfurt 34 Jl | O I 21. August 19SA-Hubert F = Neuhausen, Uächtersbacher Str. 4, 6000 Frankfurt 34 Jl | O I August 21, 19SA-

Beschreibungdescription

Hur Neuanmeldung ,,Flußsäure - enthaltende wässrige organische Säuremischungen mit eventuellem Zusatz von anorganischen Esuren und Korrosionsinhibitoren.Hur new registration ,, hydrofluoric acid - containing aqueous organic acid mixtures with possible addition of inorganic acids and corrosion inhibitors.

Gegenstand der Erfindung sind organische Säurelösungen, di'e statt Salzsäure Flußsäure enthalten, um damit sogenannte ,,Vererzungen" und/oder anders kisselsäurehaltige Reaktionsprodukte in Trinkwasserbrunnen hu Lösen, was mit den bisher eingesetzten Säurekombinationen nicht möglich ist. Damit ist der Wegfall eines- Reduktions- bzw» Oxydationsmittels verbunden, welche bisher zum Lösen von Manganoxyd (MnO2) benötigt wurden, wobei zu bemerken ist, dass der CSB bzw. SSB5 bei eingesetzten Reduktionsmitteln in den später abgepumpten Reaktionswässern, d.h. Abwässer nach Regenerierung (aus Brunnen) außergewöhnlich hoch ist. Bei dem Einsatz von Kieswaschmaschinen aus Edelstahl entfällt das Auftreten von Lochfraß- und Spannungsrißkorrosion, die sich beim Einsatz von Salzsäure nicht vermeiden lassen. Es besteht kein Problem, eventuell unverbrauchte Flußsäure beim Klarpumpen des Brunnens über eine einfache Kalziumverbindung (CaO5 Ca(0H)2 etc.) zu neutralisieren, wobei absolut harmloses Kalziumfluorid ausfällt,The invention relates to organic acid solutions which contain hydrofluoric acid instead of hydrochloric acid in order to dissolve so-called "mineralization" and / or other reaction products containing kisselic acid in drinking water wells, which is not possible with the acid combinations used up to now - or »oxidizing agents, which were previously required to dissolve manganese oxide (MnO2), whereby it should be noted that the COD or SSB5 is exceptionally high when reducing agents are used in the reaction water later pumped out, ie waste water after regeneration (from wells). When using gravel washing machines made of stainless steel, pitting and stress corrosion cracking, which cannot be avoided when using hydrochloric acid, do not occur. There is no problem, possibly unused hydrofluoric acid when pumping the well through a simple calcium compound (CaO 5 Ca (OH) 2 etc.) to neutralize, taking absolutely harmless calcium fluorine id fails,

(ENDE)(END)

Claims (1)

An das Deutsche Patentamt
Zweibrückenstr. 12
8000 MünchenTo the German Patent Office
Zweibrückenstrasse 12th
8000 Munich Betr.: P 34 31 101.7Re: P 34 31 101.7 Sehr geehrte Herren,Dear Sirs, bezugnehmend auf den Brief vom 21.8.84 stelle ich hiermit Prüfungsantrag. Der Prüfung soll folgender Patentanspruch zugrundeliegen: With reference to the letter dated August 21, 1984, I hereby apply for an examination. The examination should be based on the following patent claim: /7V Gegenstand der Erfindung sind organische Säurelösungen, die statt Salzsäure Flußsäure enthalten, um damit sogenannte "Vererzungen" und/oder andere kieselsäurehaltige Reaktionsprodukte in Trinkwasserbrunnen zu lösen, was mit den bisher eingesetzten Säurekombinationen nicht möglich ist. Damit ist der Wegfall eines Reduktions- bzw. Oxydationsmittels verbunden, welche bisher zum Lösen von Manganoxyd (MnC^) benötigt wurden, wobei zu bemerken ist, dass der CSB bzw. BSB5 bei eingesetzten Reduktionsmitteln in den später abgepumpten Reaktionswässern, d.h. Abwasser nach Regenerierung (aus Brunnen) aussergewöhnlich hoch ist. Bei dem Einsatz von Kieswaschmaschinen aus Edelstahl entfällt das Auftreten von Lochfraß- und Spannungsrisskorrosion, die sich beim Einsatz von Salzsäure nicht vermeiden lassen. Es besteht kein Problem, eventuell unverbrauchte Flußsäure beim Klarpumpen des Brunnens über eine einfache Kalziumverbindung (CaO, Ca (OH)2 etc.) zu neutralisieren, wobei absolut harmloses Kalziumfluorid ausfällt./ 7 V The invention relates to organic acid solutions containing hydrofluoric acid instead of hydrochloric acid to dissolve so that so-called "mineralization" and / or other silica-containing reaction products in drinking water wells, which is not possible with the previously used acid combinations. This means that there is no need for a reducing or oxidizing agent, which was previously required to dissolve manganese oxide (MnC ^), whereby it should be noted that the COD or BOD5 when reducing agents are used in the later pumped off reaction waters, i.e. wastewater after regeneration ( from wells) is exceptionally high. When using gravel washing machines made of stainless steel, there is no occurrence of pitting and stress corrosion cracking, which cannot be avoided when using hydrochloric acid. There is no problem with neutralizing any unused hydrofluoric acid when pumping the well through a simple calcium compound (CaO, Ca (OH) 2 etc.), with absolutely harmless calcium fluoride precipitating. Ich bitte höflich um beschleunigte Bearbeitung. Zur Begründung führe ich aus, dass ich innerhalb des Prioritätsjahres Auslandsanmeldungen beabsichtige.I kindly ask for expedited processing. Lead to the justification I assume that I intend to register abroad within the priority year. eundlichen Grüssenbest regards (H.F.Neuhausen)(H.F. Neuhausen) Den Prüfungskostenbetrag von DM 420.— habe ich heute überwiesen. Sollten weitere Kosten anfallen, bitte ich Sie, dies mitzuteilen.I paid the examination fee of DM 420 today. Should I ask you to inform us about further costs.
DE19843431101 1984-08-24 1984-08-24 Hydrofluoric-acid-containing aqueous organic acid mixtures, possibly with an addition of inorganic acids and corrosion inhibitors Granted DE3431101A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19843431101 DE3431101A1 (en) 1984-08-24 1984-08-24 Hydrofluoric-acid-containing aqueous organic acid mixtures, possibly with an addition of inorganic acids and corrosion inhibitors
IL76170A IL76170A0 (en) 1984-08-24 1985-08-23 Process for the purification of a drinking water well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843431101 DE3431101A1 (en) 1984-08-24 1984-08-24 Hydrofluoric-acid-containing aqueous organic acid mixtures, possibly with an addition of inorganic acids and corrosion inhibitors

Publications (2)

Publication Number Publication Date
DE3431101A1 true DE3431101A1 (en) 1986-03-06
DE3431101C2 DE3431101C2 (en) 1987-12-03

Family

ID=6243747

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843431101 Granted DE3431101A1 (en) 1984-08-24 1984-08-24 Hydrofluoric-acid-containing aqueous organic acid mixtures, possibly with an addition of inorganic acids and corrosion inhibitors

Country Status (2)

Country Link
DE (1) DE3431101A1 (en)
IL (1) IL76170A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282967A (en) * 1989-03-06 1994-02-01 Morita Kagaku Kogyo Co., Ltd. Method for feeding germ-free pure water
EP0636712A1 (en) * 1993-07-29 1995-02-01 Framatome Chemical cleaning process for metall workpieces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2060596A5 (en) * 1969-09-30 1971-06-18 Vaw Ver Aluminium Werke Ag
DE2520988C2 (en) * 1974-05-16 1983-06-30 Mitsubishi Gas Chemical Co., Inc., Tokyo Process for removing scale and / or sludge deposits
DE3244443A1 (en) * 1982-12-01 1984-06-07 Rainer 7888 Rheinfelden Späne HYDROPEROXIDE CONTAINING AQUEOUS MINERAL ACID PREPARATIONS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2060596A5 (en) * 1969-09-30 1971-06-18 Vaw Ver Aluminium Werke Ag
DE2520988C2 (en) * 1974-05-16 1983-06-30 Mitsubishi Gas Chemical Co., Inc., Tokyo Process for removing scale and / or sludge deposits
DE3244443A1 (en) * 1982-12-01 1984-06-07 Rainer 7888 Rheinfelden Späne HYDROPEROXIDE CONTAINING AQUEOUS MINERAL ACID PREPARATIONS

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
KIRK-OTHMER, Encyclopedia of chemical Technology, 3. Aufl., Bd. 10, S. 676-677 *
Kittner-Starke-Wissel: Wasserversorgung 4. Aufl., (1977), S. 159-167 *
POWELL, Water Conditioning for Industry, (1954), S. 435-437 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282967A (en) * 1989-03-06 1994-02-01 Morita Kagaku Kogyo Co., Ltd. Method for feeding germ-free pure water
EP0636712A1 (en) * 1993-07-29 1995-02-01 Framatome Chemical cleaning process for metall workpieces
FR2708628A1 (en) * 1993-07-29 1995-02-10 Framatome Sa Method of chemical cleaning of metallic material parts.
US5575863A (en) * 1993-07-29 1996-11-19 Framatome Process for the chemical cleaning of metal components

Also Published As

Publication number Publication date
IL76170A0 (en) 1985-12-31
DE3431101C2 (en) 1987-12-03

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee