CA2049859A1 - Production of low-chloride alkali metal phosphates - Google Patents

Production of low-chloride alkali metal phosphates

Info

Publication number
CA2049859A1
CA2049859A1 CA 2049859 CA2049859A CA2049859A1 CA 2049859 A1 CA2049859 A1 CA 2049859A1 CA 2049859 CA2049859 CA 2049859 CA 2049859 A CA2049859 A CA 2049859A CA 2049859 A1 CA2049859 A1 CA 2049859A1
Authority
CA
Canada
Prior art keywords
potassium
chloride
phosphate
low
converted
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
CA 2049859
Other languages
French (fr)
Other versions
CA2049859C (en
Inventor
Kim D. Nguyen
Donald R. Spink
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.)
Alpine Plant Foods Ltd
Original Assignee
Alpine Plant Foods Ltd
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 Alpine Plant Foods Ltd filed Critical Alpine Plant Foods Ltd
Priority to CA 2049859 priority Critical patent/CA2049859C/en
Publication of CA2049859A1 publication Critical patent/CA2049859A1/en
Application granted granted Critical
Publication of CA2049859C publication Critical patent/CA2049859C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • C01B25/38—Condensed phosphates
    • C01B25/42—Pyrophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates

Abstract

Potassium phosphate useful as a low-chloride content fertilizer is prepared by reacting phosphoric acid, commercial or technical grade, with fertilizer-grade potassium chloride (Muriate of Potash, 60-63% K2O) at a reaction temperature of about 130° to about 200°C
and a mole ratio of phosphorus to potassium of at least about 1.3:1. The vaporization of hydrogen chloride from the reaction mixture is effected by a novel technique combining air followed by steam stripping. The reaction product is used to produce various types as well as grades of fertilizers. The procedure may be used to form sodium phosphate in analogous manner from sodium chloride, which then may be converted to trisodium phosphate or sodium tripolyphosphate. The potassium phosphate may be converted to potassium pyrophosphate by neutralization with potassium hydroxide followed by calcination.
CA 2049859 1991-08-26 1991-08-26 Production of low-chloride alkali metal phosphates Expired - Fee Related CA2049859C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2049859 CA2049859C (en) 1991-08-26 1991-08-26 Production of low-chloride alkali metal phosphates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2049859 CA2049859C (en) 1991-08-26 1991-08-26 Production of low-chloride alkali metal phosphates

Publications (2)

Publication Number Publication Date
CA2049859A1 true CA2049859A1 (en) 1993-02-27
CA2049859C CA2049859C (en) 1996-06-18

Family

ID=4148251

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2049859 Expired - Fee Related CA2049859C (en) 1991-08-26 1991-08-26 Production of low-chloride alkali metal phosphates

Country Status (1)

Country Link
CA (1) CA2049859C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103787297A (en) * 2013-12-20 2014-05-14 柳州百韧特先进材料有限公司 Method for preparing stannous pyrophosphate by utilizing stannous chloride high-iron waste liquor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103787297A (en) * 2013-12-20 2014-05-14 柳州百韧特先进材料有限公司 Method for preparing stannous pyrophosphate by utilizing stannous chloride high-iron waste liquor
CN103787297B (en) * 2013-12-20 2016-04-27 柳州百韧特先进材料有限公司 Tin protochloride high ferro waste liquid is utilized to prepare the method for stannous pyrophosphate

Also Published As

Publication number Publication date
CA2049859C (en) 1996-06-18

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed