FR2220473A1 - Monopotassium orthophosphate prepn. - from potassium chloride and a calcium phosphate component - Google Patents

Monopotassium orthophosphate prepn. - from potassium chloride and a calcium phosphate component

Info

Publication number
FR2220473A1
FR2220473A1 FR7308295A FR7308295A FR2220473A1 FR 2220473 A1 FR2220473 A1 FR 2220473A1 FR 7308295 A FR7308295 A FR 7308295A FR 7308295 A FR7308295 A FR 7308295A FR 2220473 A1 FR2220473 A1 FR 2220473A1
Authority
FR
France
Prior art keywords
prepn
calcium phosphate
potassium chloride
cao
mixt
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
FR7308295A
Other languages
French (fr)
Other versions
FR2220473B1 (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.)
AZOTE CIE
Original Assignee
AZOTE CIE
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 AZOTE CIE filed Critical AZOTE CIE
Priority to FR7308295A priority Critical patent/FR2220473A1/en
Publication of FR2220473A1 publication Critical patent/FR2220473A1/en
Application granted granted Critical
Publication of FR2220473B1 publication Critical patent/FR2220473B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/30—Alkali metal phosphates
    • C01B25/301—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates

Abstract

The prepn of KH2PO4 is carried out by reacting KCL in an aqs. medium with a cpd. or mixt of cpds of H3PO4 and CaO in which the CaO=P2O5 molar ratio is 0.7-1.1 (pref. 0.9- 1.0), at a temp low enough for pptn. (esp. -5 to +5 degrees C). The K:P molar ratio of the reactants is pref. 1.1-2.0 (esp. 1.25-1.50). The starting material can be hydrated monocalcium phosphate or a mixt. of H3PO4 and CaCO3, CaO, anhydrous dicalcium phosphate or di- and tricalcium phosphate. The KH2PO4 can be crystallised out of the reaction mixt. in high yield (e.g. 60-75% based on P2O5).
FR7308295A 1973-03-08 1973-03-08 Monopotassium orthophosphate prepn. - from potassium chloride and a calcium phosphate component Granted FR2220473A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7308295A FR2220473A1 (en) 1973-03-08 1973-03-08 Monopotassium orthophosphate prepn. - from potassium chloride and a calcium phosphate component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7308295A FR2220473A1 (en) 1973-03-08 1973-03-08 Monopotassium orthophosphate prepn. - from potassium chloride and a calcium phosphate component

Publications (2)

Publication Number Publication Date
FR2220473A1 true FR2220473A1 (en) 1974-10-04
FR2220473B1 FR2220473B1 (en) 1976-09-10

Family

ID=9115969

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7308295A Granted FR2220473A1 (en) 1973-03-08 1973-03-08 Monopotassium orthophosphate prepn. - from potassium chloride and a calcium phosphate component

Country Status (1)

Country Link
FR (1) FR2220473A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
FR2220473B1 (en) 1976-09-10

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Legal Events

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