GB469704A - Improvements relating to the purification of metaphosphates - Google Patents

Improvements relating to the purification of metaphosphates

Info

Publication number
GB469704A
GB469704A GB2519736A GB2519736A GB469704A GB 469704 A GB469704 A GB 469704A GB 2519736 A GB2519736 A GB 2519736A GB 2519736 A GB2519736 A GB 2519736A GB 469704 A GB469704 A GB 469704A
Authority
GB
United Kingdom
Prior art keywords
solution
impurities
dryness
precipitated
filtering
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.)
Expired
Application number
GB2519736A
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.)
RUMFORD CHEMICAL WORKS
Original Assignee
RUMFORD CHEMICAL WORKS
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 RUMFORD CHEMICAL WORKS filed Critical RUMFORD CHEMICAL WORKS
Priority to GB2519736A priority Critical patent/GB469704A/en
Publication of GB469704A publication Critical patent/GB469704A/en
Expired 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
    • C01B25/38—Condensed phosphates
    • C01B25/44—Metaphosphates
    • C01B25/445—Metaphosphates of alkali metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Epoxy Compounds (AREA)

Abstract

Alkali metal metaphosphates, for instance the sodium or potassium salts, are freed from impurities such as iron, aluminium, chromium, or vanadium, by treating their solutions with a soluble alkaline compound such as caustic soda, and filtering off the precipitate formed. Slight excess of the alkali is preferably used, but insufficient to redissolve any aluminia precipitated. The purified solution may be evaporated to dryness and ignited. The metaphosphate may be obtained from a solution of phosphatic material in sulphuric acid by adding sodium hydroxide or carbonate to form a solution of sodium dihydrogen phosphate and precipitate a portion of the impurities, filtering the solution and evaporating it to dryness, and fusing the residue; or the sulphuric acid solution may be so concentrated that on addition of sodium hydroxide &c. the dihydrogen phosphate is precipitated in the solid form which is heated and fused without separation of any impurities.
GB2519736A 1936-09-16 1936-09-16 Improvements relating to the purification of metaphosphates Expired GB469704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2519736A GB469704A (en) 1936-09-16 1936-09-16 Improvements relating to the purification of metaphosphates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2519736A GB469704A (en) 1936-09-16 1936-09-16 Improvements relating to the purification of metaphosphates

Publications (1)

Publication Number Publication Date
GB469704A true GB469704A (en) 1937-07-30

Family

ID=10223798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2519736A Expired GB469704A (en) 1936-09-16 1936-09-16 Improvements relating to the purification of metaphosphates

Country Status (1)

Country Link
GB (1) GB469704A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2701021C1 (en) * 2018-11-20 2019-09-24 ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ УНИТАРНОЕ ПРЕДПРИЯТИЕ "ИНСТИТУТ ХИМИЧЕСКИХ РЕАКТИВОВ И ОСОБО ЧИСТЫХ ХИМИЧЕСКИХ ВЕЩЕСТВ НАЦИОНАЛЬНОГО ИССЛЕДОВАТЕЛЬСКОГО ЦЕНТРА "КУРЧАТОВСКИЙ ИНСТИТУТ" (НИЦ "Курчатовский институт - ИРЕА) Method of purifying solutions of potassium dihydrogen phosphate from d-metals and aluminum impurities
CN115159488A (en) * 2022-07-22 2022-10-11 承德莹科精细化工股份有限公司 Preparation method of high-water-solubility glass-state sodium metaphosphate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2701021C1 (en) * 2018-11-20 2019-09-24 ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ УНИТАРНОЕ ПРЕДПРИЯТИЕ "ИНСТИТУТ ХИМИЧЕСКИХ РЕАКТИВОВ И ОСОБО ЧИСТЫХ ХИМИЧЕСКИХ ВЕЩЕСТВ НАЦИОНАЛЬНОГО ИССЛЕДОВАТЕЛЬСКОГО ЦЕНТРА "КУРЧАТОВСКИЙ ИНСТИТУТ" (НИЦ "Курчатовский институт - ИРЕА) Method of purifying solutions of potassium dihydrogen phosphate from d-metals and aluminum impurities
CN115159488A (en) * 2022-07-22 2022-10-11 承德莹科精细化工股份有限公司 Preparation method of high-water-solubility glass-state sodium metaphosphate
CN115159488B (en) * 2022-07-22 2023-06-30 承德莹科精细化工股份有限公司 Preparation method of high water-solubility glassy sodium metaphosphate

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