GB2009724A - Process for purifying crystalline potassium chloride - Google Patents

Process for purifying crystalline potassium chloride

Info

Publication number
GB2009724A
GB2009724A GB7847503A GB7847503A GB2009724A GB 2009724 A GB2009724 A GB 2009724A GB 7847503 A GB7847503 A GB 7847503A GB 7847503 A GB7847503 A GB 7847503A GB 2009724 A GB2009724 A GB 2009724A
Authority
GB
United Kingdom
Prior art keywords
potassium chloride
sodium chloride
chloride
crystalline potassium
leaching solution
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
GB7847503A
Other versions
GB2009724B (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.)
PPG Industries Canada Ltd
Original Assignee
PPG Industries Canada 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 PPG Industries Canada Ltd filed Critical PPG Industries Canada Ltd
Publication of GB2009724A publication Critical patent/GB2009724A/en
Application granted granted Critical
Publication of GB2009724B publication Critical patent/GB2009724B/en
Expired 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
    • C01D3/14—Purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

A 97.5 or more weight percent pure crystalline potassium chloride product formed by crystallization from a solution rich in both sodium chloride and potassium chloride, the crystalline potassium chloride containing a minor contaminating amount of sodium chloride, is reduced in sodium chloride content by contacting the crystals with an aqueous leaching solution, wherein the solute is potassium chloride or a mixture of potassium chloride and sodium chloride, the leaching solution being saturated with respect to potassium chloride and, when present, unsaturated with respect to sodium chloride, for a time sufficient to reduce substantially the sodium chloride content in the crystalline potassium chloride. Subsequently, the crystalline potassium chloride product having a reduced sodium chloride content is recovered from the leaching solution.
GB7847503A 1977-12-08 1978-12-07 Process for purifying crystalline potassium chloride Expired GB2009724B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85886677A 1977-12-08 1977-12-08

Publications (2)

Publication Number Publication Date
GB2009724A true GB2009724A (en) 1979-06-20
GB2009724B GB2009724B (en) 1982-05-26

Family

ID=25329395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7847503A Expired GB2009724B (en) 1977-12-08 1978-12-07 Process for purifying crystalline potassium chloride

Country Status (3)

Country Link
DE (1) DE2852925B2 (en)
FR (1) FR2411158A1 (en)
GB (1) GB2009724B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487809A1 (en) * 1980-07-31 1982-02-05 Ppg Ind Canada Ltd PROCESS FOR PURIFYING POTASSIUM CHLORIDE PARTICLES
FR2489292A1 (en) * 1980-09-01 1982-03-05 Kerr Mc Gee Chem Corp Potassium salts e.g. potassium chloride or sulphate purificn. - by compacting to uniform density, comminuting, and washing with potassium salt soln. less than 50 per cent satd. with sodium chloride

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248601A (en) * 1979-07-12 1981-02-03 Kerr-Mcgee Chemical Corporation Process for reducing the sodium chloride content of a potassium salt
ATE128104T1 (en) * 1993-06-03 1995-10-15 Kali & Salz Ag METHOD AND DEVICE FOR TREATING A POTASSIUM CHLORIDE MIXTURE.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE235751C (en) *
DE282952C (en) *
DE248462C (en) *
FR497577A (en) * 1918-03-27 1919-12-10 Pietro Benvenuti Process for the extraction and separation of potassium chloride from mixtures or saturated solutions of sodium and potassium chlorides
FR1226060A (en) * 1958-06-23 1960-07-08 United States Borax Chem Processing of ores containing potassium to remove sulphates

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487809A1 (en) * 1980-07-31 1982-02-05 Ppg Ind Canada Ltd PROCESS FOR PURIFYING POTASSIUM CHLORIDE PARTICLES
FR2489292A1 (en) * 1980-09-01 1982-03-05 Kerr Mc Gee Chem Corp Potassium salts e.g. potassium chloride or sulphate purificn. - by compacting to uniform density, comminuting, and washing with potassium salt soln. less than 50 per cent satd. with sodium chloride

Also Published As

Publication number Publication date
GB2009724B (en) 1982-05-26
DE2852925A1 (en) 1979-07-05
DE2852925B2 (en) 1980-08-28
FR2411158A1 (en) 1979-07-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee