JPS5551707A - Crude phosphoric acid purifying method - Google Patents

Crude phosphoric acid purifying method

Info

Publication number
JPS5551707A
JPS5551707A JP12467278A JP12467278A JPS5551707A JP S5551707 A JPS5551707 A JP S5551707A JP 12467278 A JP12467278 A JP 12467278A JP 12467278 A JP12467278 A JP 12467278A JP S5551707 A JPS5551707 A JP S5551707A
Authority
JP
Japan
Prior art keywords
phosphoric acid
org
layer
extracted
washed
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.)
Pending
Application number
JP12467278A
Other languages
Japanese (ja)
Inventor
Seikichi Tabei
Takeo Miyabe
Osamu Mihara
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.)
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co 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 Nippon Chemical Industrial Co Ltd filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP12467278A priority Critical patent/JPS5551707A/en
Publication of JPS5551707A publication Critical patent/JPS5551707A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To raise impurity removing efficiency and crude phosphoric acid purifying efficiency by extracting crude phosphoric acid with an org. solvent; washing the extracted org. solvent layer with an aq. soln. of one or more kinds of sol. salts; and back-extracting the washed layer with water.
CONSTITUTION: Wet process crude phosphoric acid is extracted with an org. solvent such as methyl isobutyl ketone. To the extracted org. solvent layer is added an aq. soln. of one or more kinds of sol. salts such as Na2CO3 forming no precipitate together with phosphoric acid and dissolved impurities, and they are stirred to wash the org. layer. The amt. of the sol. salts added is 0.15mol or more, esp. 0.08W0.15 mol as cation to 1mol of phosphoric acid in the layer. The washed org. layer is then back-extracted with water to obtain high purity phosphoric acid. The washed org. layer may be washed with a little water or phosphoric acid.
COPYRIGHT: (C)1980,JPO&Japio
JP12467278A 1978-10-12 1978-10-12 Crude phosphoric acid purifying method Pending JPS5551707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12467278A JPS5551707A (en) 1978-10-12 1978-10-12 Crude phosphoric acid purifying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12467278A JPS5551707A (en) 1978-10-12 1978-10-12 Crude phosphoric acid purifying method

Publications (1)

Publication Number Publication Date
JPS5551707A true JPS5551707A (en) 1980-04-15

Family

ID=14891195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12467278A Pending JPS5551707A (en) 1978-10-12 1978-10-12 Crude phosphoric acid purifying method

Country Status (1)

Country Link
JP (1) JPS5551707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100684983B1 (en) 2005-04-22 2007-02-20 한국화학연구원 Purification method of phosphoric acid through layer crystallization including washing operation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223597A (en) * 1975-08-14 1977-02-22 Stauffer Chemical Co Manufacturing process for food grade phosphoric acid from wet method phosphoric acid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223597A (en) * 1975-08-14 1977-02-22 Stauffer Chemical Co Manufacturing process for food grade phosphoric acid from wet method phosphoric acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100684983B1 (en) 2005-04-22 2007-02-20 한국화학연구원 Purification method of phosphoric acid through layer crystallization including washing operation

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