FR2096718A1 - Sodium sulphate prodn - Google Patents

Sodium sulphate prodn

Info

Publication number
FR2096718A1
FR2096718A1 FR7040351A FR7040351A FR2096718A1 FR 2096718 A1 FR2096718 A1 FR 2096718A1 FR 7040351 A FR7040351 A FR 7040351A FR 7040351 A FR7040351 A FR 7040351A FR 2096718 A1 FR2096718 A1 FR 2096718A1
Authority
FR
France
Prior art keywords
nano3
filtered
right arrow
4nano3
cahpo4
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.)
Withdrawn
Application number
FR7040351A
Other languages
French (fr)
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
Publication of FR2096718A1 publication Critical patent/FR2096718A1/en
Withdrawn legal-status Critical Current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
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C01D5/06—Preparation of sulfates by double decomposition
    • C01D5/08—Preparation of sulfates by double decomposition with each other or with ammonium sulfate
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

PROCESS FOR PREPARING Na2SO4. M6A. by a process interlinked with processes for making fertilisers including magnesium ammonium phosphate, NaNO3, KNO3, CaHPO4. The Na2SO4 is used in the glass industry. It is cheap because both anion and cation are obtained as by-products of fertiliser processes. Interdependent processes used for H2SO4 free. Process are:- (i) Ca3(PO4)2 +3Na2SO4 right arrow 3CaSO4 +2NaH2PO4 + 4NaNO3. (CaSO4 is filtered off). (ii) 4NaNO3 + 2NaH2PO4 + CaO right arrow 4NaNO3 + CaHPO4 + Na2HPO4+H2O(CaHPO4 is filtered off). (iii) CaO. MgO + Na2SO4 + 4HNO3 right arrow CaSO4 + Mg(NO3)2 + 2 NaNO3 + 2H2O (CaSO4 is filtered off). (iv) Mg(NO3)2 + Na2HPO4 + NH3 + 6H2O right arrow MgNH4PO4.6H2O + 2NaNO3. The phosphate from iv is filtered off and the solution of NaNO3 is concentrated in a multistage evaporator. Crystals of NaNO3 are sold as fertiliser.
FR7040351A 1969-11-20 1970-11-10 Sodium sulphate prodn Withdrawn FR2096718A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE741982 1969-11-20

Publications (1)

Publication Number Publication Date
FR2096718A1 true FR2096718A1 (en) 1972-02-25

Family

ID=3855682

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7040351A Withdrawn FR2096718A1 (en) 1969-11-20 1970-11-10 Sodium sulphate prodn

Country Status (2)

Country Link
BE (1) BE741982A (en)
FR (1) FR2096718A1 (en)

Also Published As

Publication number Publication date
BE741982A (en) 1970-05-04

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Legal Events

Date Code Title Description
ST Notification of lapse