FR2250711A1 - Hydrochloric acid effluent treatment - by lime neutralization and sulphuric and admixture to remove calcium sulphite - Google Patents

Hydrochloric acid effluent treatment - by lime neutralization and sulphuric and admixture to remove calcium sulphite

Info

Publication number
FR2250711A1
FR2250711A1 FR7340067A FR7340067A FR2250711A1 FR 2250711 A1 FR2250711 A1 FR 2250711A1 FR 7340067 A FR7340067 A FR 7340067A FR 7340067 A FR7340067 A FR 7340067A FR 2250711 A1 FR2250711 A1 FR 2250711A1
Authority
FR
France
Prior art keywords
hydrochloric acid
sulphuric
admixture
effluent treatment
remove calcium
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
FR7340067A
Other languages
French (fr)
Other versions
FR2250711B3 (en
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.)
Sulzer Escher Wyss AG
Original Assignee
Escher Wyss AG
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 Escher Wyss AG filed Critical Escher Wyss AG
Priority to FR7340067A priority Critical patent/FR2250711A1/en
Priority to CH1483774A priority patent/CH598140A5/xx
Priority to DE19742453531 priority patent/DE2453531A1/en
Publication of FR2250711A1 publication Critical patent/FR2250711A1/en
Application granted granted Critical
Publication of FR2250711B3 publication Critical patent/FR2250711B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/529—Processes or devices for preparing lime water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes

Landscapes

  • 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)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Industrial effluents from metal rinsing baths, containing hydrochloric acid, following the pickling operation before hot-dip galvanizing are first neutralized by adding lime. Sulphuric acid is added to the resulting CaCl2 solution to produce CaSO4 and a strongly diluted HCl solution. The latter is recycled into the process circuit. This eliminates the formation of effluents with a high content of salts (CaCl, NaCl) which are difficult to treat and cause serious pollution of the waste water channels. The by-products can be sold for the manufacture of paper and the process needs little make-up water.
FR7340067A 1973-11-12 1973-11-12 Hydrochloric acid effluent treatment - by lime neutralization and sulphuric and admixture to remove calcium sulphite Granted FR2250711A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7340067A FR2250711A1 (en) 1973-11-12 1973-11-12 Hydrochloric acid effluent treatment - by lime neutralization and sulphuric and admixture to remove calcium sulphite
CH1483774A CH598140A5 (en) 1973-11-12 1974-11-06
DE19742453531 DE2453531A1 (en) 1973-11-12 1974-11-12 TREATMENT OF WASTE WATER FROM PROCESSES WITH SALINE ACID BATHS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7340067A FR2250711A1 (en) 1973-11-12 1973-11-12 Hydrochloric acid effluent treatment - by lime neutralization and sulphuric and admixture to remove calcium sulphite

Publications (2)

Publication Number Publication Date
FR2250711A1 true FR2250711A1 (en) 1975-06-06
FR2250711B3 FR2250711B3 (en) 1976-09-24

Family

ID=9127576

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7340067A Granted FR2250711A1 (en) 1973-11-12 1973-11-12 Hydrochloric acid effluent treatment - by lime neutralization and sulphuric and admixture to remove calcium sulphite

Country Status (3)

Country Link
CH (1) CH598140A5 (en)
DE (1) DE2453531A1 (en)
FR (1) FR2250711A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108275802A (en) * 2018-02-13 2018-07-13 洛阳鑫益达工业设备有限公司 A kind of acid regeneration processing system and its regeneration treating method

Also Published As

Publication number Publication date
CH598140A5 (en) 1978-04-28
FR2250711B3 (en) 1976-09-24
DE2453531A1 (en) 1975-05-15

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Legal Events

Date Code Title Description
ST Notification of lapse