RU96124067A - METHOD FOR CLEANING PHOSPHORIC ACID - Google Patents

METHOD FOR CLEANING PHOSPHORIC ACID

Info

Publication number
RU96124067A
RU96124067A RU96124067/25A RU96124067A RU96124067A RU 96124067 A RU96124067 A RU 96124067A RU 96124067/25 A RU96124067/25 A RU 96124067/25A RU 96124067 A RU96124067 A RU 96124067A RU 96124067 A RU96124067 A RU 96124067A
Authority
RU
Russia
Prior art keywords
phosphoric acid
purified
crystallization
acid
thicken
Prior art date
Application number
RU96124067/25A
Other languages
Russian (ru)
Other versions
RU2139240C1 (en
Inventor
Андерс Векман
Original Assignee
Кемира Кемикалс ОЙ
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
Priority claimed from FI942947A external-priority patent/FI95905C/en
Application filed by Кемира Кемикалс ОЙ filed Critical Кемира Кемикалс ОЙ
Publication of RU96124067A publication Critical patent/RU96124067A/en
Application granted granted Critical
Publication of RU2139240C1 publication Critical patent/RU2139240C1/en

Links

Claims (9)

1. Способ очистки неочищенной фосфорной кислоты, полученной мокрым способом, отличающийся тем, что фосфорную кислоту, подлежащую очистке, сгущают нагреванием до концентрации 58-68% по Р2О5 и примеси удаляют из нее путем кристаллизации в виде соединения М2+ (Н2РО4)2 • n • Н3РО4 , где M2+ - двухвалентный ион металла примеси, а n = 2-5.1. The method of purification of crude phosphoric acid obtained by the wet method, characterized in that the phosphoric acid to be purified is concentrated by heating to a concentration of 58-68% according to P 2 O 5 and the impurities are removed from it by crystallization in the form of compound M 2+ (N 2 PO 4 ) 2 • n • H 3 PO 4 , where M 2+ is the divalent metal ion of the impurity, and n = 2-5. 2. Способ по п.1, отличающийся тем, что перед сгущением из кислоты, подлежащей очистке, удаляют сульфатные ионы. 2. The method according to claim 1, characterized in that before thickening from the acid to be purified, sulfate ions are removed. 3. Способ по пп.1 или 2, отличающийся тем, что сгущение производят при температуре от 90 до 150°С при давлении 65 мм рт.ст. 3. The method according to PP.1 or 2, characterized in that the thickening is carried out at a temperature of from 90 to 150 ° C at a pressure of 65 mm Hg 4. Способ по пп.1-3, отличающийся тем, что в сгущенную кислоту вводят затравочные кристаллы. 4. The method according to claims 1 to 3, characterized in that the seed crystals are introduced into the condensed acid. 5. Способ по пп.1-4, отличающийся тем, что из фосфорной кислоты кристаллизацией удаляют двухвалентные ионы металлов, в особенности Мg, Fe, Мn, Zn, Cd и Си. 5. The method according to claims 1 to 4, characterized in that divalent metal ions, in particular Mg, Fe, Mn, Zn, Cd and Cu, are removed from the phosphoric acid by crystallization. 6. Способ по пп. 1-5, отличающийся тем, что фосфорную кислоту, подлежащую очистке, сгущают по меньшей мере до 61% по Р2О5.6. The method according to PP. 1-5, characterized in that the phosphoric acid to be purified, thicken at least 61% by P 2 About 5 . 7. Способ по пп. 1-6, отличающийся тем, что фосфорную кислоту, подлежащую очистке, сгущают не более чем до 65% по P2O5.7. The method according to PP. 1-6, characterized in that the phosphoric acid to be purified, thicken not more than 65% by P 2 O 5 . 8. Способ по пп. 1-7, отличающийся тем, что температура кристаллизации соединений примесей составляет от 0 до 100°С, предпочтительно от 20 до 90°С. 8. The method according to PP. 1-7, characterized in that the crystallization temperature of the impurity compounds is from 0 to 100 ° C, preferably from 20 to 90 ° C. 9. Применение соединений выкристаллизовавшихся примесей в способе по п. 1 в удобрениях или в кормах животных. 9. The use of compounds of crystallized impurities in the method according to claim 1 in fertilizers or animal feed.
RU96124067A 1994-06-20 1995-06-19 Method of purifying phosphoric acid RU2139240C1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI942947 1994-06-20
FI942947A FI95905C (en) 1994-06-20 1994-06-20 Process for the purification of phosphoric acid
PCT/FI1995/000354 WO1995035257A1 (en) 1994-06-20 1995-06-19 Process for the purification of phosphoric acid

Publications (2)

Publication Number Publication Date
RU96124067A true RU96124067A (en) 1999-02-20
RU2139240C1 RU2139240C1 (en) 1999-10-10

Family

ID=8540956

Family Applications (1)

Application Number Title Priority Date Filing Date
RU96124067A RU2139240C1 (en) 1994-06-20 1995-06-19 Method of purifying phosphoric acid

Country Status (12)

Country Link
EP (1) EP0768985A1 (en)
AU (1) AU2740195A (en)
BG (1) BG101023A (en)
CZ (1) CZ365596A3 (en)
FI (1) FI95905C (en)
HU (1) HUT76719A (en)
NO (1) NO965470L (en)
PL (1) PL318219A1 (en)
RO (1) RO114886B1 (en)
RU (1) RU2139240C1 (en)
SK (1) SK161696A3 (en)
WO (1) WO1995035257A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454101B1 (en) * 2002-03-15 2004-10-26 한국화학연구원 Purification method and equipment for phosphoric acid
KR100542969B1 (en) * 2005-03-18 2006-01-20 (주) 광진화학 Method of refining high-purity phosphoric acid continuously using deserted liquid from process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL26524A (en) * 1965-10-04 1970-07-19 Struthers Scient And Int Corp Phosphoric acid process

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