FR2213079A1 - Salt esp. sodium chloride obtd. by evaporation crstallisation - with separate pptn. of calcium sulphate contained as suspension in brine thus permitting reuse of effluent - Google Patents

Salt esp. sodium chloride obtd. by evaporation crstallisation - with separate pptn. of calcium sulphate contained as suspension in brine thus permitting reuse of effluent

Info

Publication number
FR2213079A1
FR2213079A1 FR7300401A FR7300401A FR2213079A1 FR 2213079 A1 FR2213079 A1 FR 2213079A1 FR 7300401 A FR7300401 A FR 7300401A FR 7300401 A FR7300401 A FR 7300401A FR 2213079 A1 FR2213079 A1 FR 2213079A1
Authority
FR
France
Prior art keywords
calcium sulphate
pptn
obtd
esp
effluent
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
FR7300401A
Other languages
French (fr)
Other versions
FR2213079B1 (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.)
MIDI ET SALINES EST CIE SALINS
Original Assignee
MIDI ET SALINES EST CIE SALINS
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 MIDI ET SALINES EST CIE SALINS filed Critical MIDI ET SALINES EST CIE SALINS
Priority to FR7300401A priority Critical patent/FR2213079A1/en
Priority to DE2400595A priority patent/DE2400595A1/en
Priority to DE2400594A priority patent/DE2400594A1/en
Publication of FR2213079A1 publication Critical patent/FR2213079A1/en
Application granted granted Critical
Publication of FR2213079B1 publication Critical patent/FR2213079B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/04—Chlorides
    • C01D3/06—Preparation by working up brines; seawater or spent lyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0018—Evaporation of components of the mixture to be separated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets

Abstract

A salt, esp. sodium chloride, is obtd. by evaporation-crystallisation from a soln. contg. a high suspension of calcium sulphate; to prevent a deposition of scale in the equipment from the undersired constituents in the soln. the water from one or more evaporators, after clarification, is subjected to cooling to cause the suspended micro crystals of calcium sulphate to become dissolved; the water treated in this way is then returned to one of the evaporators. Pref. the clarification stage consists of heating the effluent from the evaporator, causing pptn. of the supersatd. calcium sulphate.
FR7300401A 1973-01-05 1973-01-05 Salt esp. sodium chloride obtd. by evaporation crstallisation - with separate pptn. of calcium sulphate contained as suspension in brine thus permitting reuse of effluent Granted FR2213079A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7300401A FR2213079A1 (en) 1973-01-05 1973-01-05 Salt esp. sodium chloride obtd. by evaporation crstallisation - with separate pptn. of calcium sulphate contained as suspension in brine thus permitting reuse of effluent
DE2400595A DE2400595A1 (en) 1973-01-05 1974-01-04 IMPROVED PROCESS FOR THE RECOVERY OF A SALT BY EVAPORATION-CRYSTALLIZATION, MAINLY FROM A SOLUTION WITH HIGH SUSPENSION, WITH RECOVERY OF WASTE WATER FOR EVAPORATION
DE2400594A DE2400594A1 (en) 1973-01-05 1974-01-04 IMPROVED PROCESS FOR EXTRACTION OF A SALT THROUGH EVAPORATION-CRYSTALLIZATION MAINLY FROM A SOLUTION WITH HIGH SUSPENSION AND RECOVERY OF THE SEWAGE FOR SLUMPING OR WASHING THE PRODUCT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7300401A FR2213079A1 (en) 1973-01-05 1973-01-05 Salt esp. sodium chloride obtd. by evaporation crstallisation - with separate pptn. of calcium sulphate contained as suspension in brine thus permitting reuse of effluent

Publications (2)

Publication Number Publication Date
FR2213079A1 true FR2213079A1 (en) 1974-08-02
FR2213079B1 FR2213079B1 (en) 1976-08-27

Family

ID=9112960

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7300401A Granted FR2213079A1 (en) 1973-01-05 1973-01-05 Salt esp. sodium chloride obtd. by evaporation crstallisation - with separate pptn. of calcium sulphate contained as suspension in brine thus permitting reuse of effluent

Country Status (2)

Country Link
DE (2) DE2400594A1 (en)
FR (1) FR2213079A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875226A1 (en) * 2004-09-14 2006-03-17 Crystal Evap Consult Sarl METHOD AND DEVICE FOR TREATING, BY EVAPORATION OR MEMBRANE-BASED TECHNIQUE, A SOLUTION WITH REVERSE SOLUBILITY SUBSTANCE (S)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1346624A (en) * 1916-12-30 1920-07-13 Worcester Salt Company Process of purifying salt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1346624A (en) * 1916-12-30 1920-07-13 Worcester Salt Company Process of purifying salt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875226A1 (en) * 2004-09-14 2006-03-17 Crystal Evap Consult Sarl METHOD AND DEVICE FOR TREATING, BY EVAPORATION OR MEMBRANE-BASED TECHNIQUE, A SOLUTION WITH REVERSE SOLUBILITY SUBSTANCE (S)
WO2006030156A1 (en) * 2004-09-14 2006-03-23 Crystal-Evap Consult Method and device for treatment by evaporation or by a membrane technique of a solution of substances with inverse solubility

Also Published As

Publication number Publication date
FR2213079B1 (en) 1976-08-27
DE2400594A1 (en) 1974-07-11
DE2400595A1 (en) 1974-07-11

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