Show metadata Hide metadata

(19)

(11)

2 191 745

(13)

(51)

IPC

(21) (22)

Application

2001111446/12, 2001-04-25

(24)

Start date

2001-04-25

(22)

Actual filing date

2001-04-25

(45)

Published

2002-10-27

(72)

Inventor

Zajtsev B.N.Zil'Berman B.Ja.Kvasnitskij I.B.Kesojan G.A.Romanovskij V.N.

(73)

Holder

Zajtsev Boris NikolaevichZil'Berman Boris JakovlevichKvasnitskij Igor' BorisovichKesojan Gevorg ArutjunovichRomanovskij Valerij Nikolaevich

EXTRACTION PHOSPHORIC ACID PURIFICATION PROCESS Russian patent published in 2002 - IPC

Abstract RU 2191745 C1

FIELD: inorganic compounds technology and fertilizers. SUBSTANCE: extraction is carried out from evaporated phosphoric acid solutions (15-17 mole/l) and extract solution is washes using dipotassium and/or diammonium phosphate solution or equivalent ammonia solution selecting cation concentration within a range of 1-6 M as function of sulfate anion concentration in initial acid and type of solution utilized. Re-extraction is accomplished as a double-step process: first part of phosphoric acid is reextracted with water and the rest of acid with excess alkali solution, extractant being simultaneously regenerated. EFFECT: enabled production of high-purity phosphoric acid with elevated recovery in minimum number of extraction steps. 5 cl, 5 tbl, 5 ex

Similar patents RU2191745C1

Title	Year	Author	Number
METHOD OF PURIFYING EXTRACTION PHOSPHORIC ACID	1998	Zajtsev B.N. Zil'Berman B.Ja. Kvasnitskij I.B. Kesojan G.A. Romanovskij V.N.	RU2166476C2
PHOSPHORIC ACID PURIFICATION PROCESS	2004	Zil'Berman Boris Jakovlevich Kvasnitskij Igor' Borisovich Makarychev-Mikhajlov Mikhail Nikolaevich Mishin Evgenij Nikolaevich	RU2297976C2
METHOD FOR PURIFYING WET-PROCESS PHOSPHORIC ACID	1994	Romanovskij V.N. Zil'Berman B.Ja. Zajtsev B.N. Kvasnitskij I.B. Samokhotov S.A. Shkljar L.I. Kuznetsov G.I. Kesojan G.A. Epifanova O.M.	RU2109681C1
EXTRACTION MIXTURE FOR THE RECOVERY OF TPE AND REE FROM HIGH-ACTIVE RAFINAT OF NPP SNF PROCESSING AND THE METHOD OF ITS USE (VERSIONS)	2016	Goletskij Nikolaj Dmitrievich Zilberman Boris Yakovlevich Myasoedov Boris Fedorovich Naumov Andrej Aleksandrovich Romanovskij Valerij Nikolaevich	RU2623943C1
METHOD OF PURIFYING WET-PROCESS PHOSPHORIC ACID	2007	Kovalenko Aleksandr Mikhajlovich Syrchenkov Aleksandr Jakovlevich Mullakhodzhaev Timur Ismajlkhodzhaevich Olifson Arkadij L'Vovich	RU2341450C1
METHOD OF PURIFICATION OF THE EXTRACTIVE PHOSPHORIC ACID	2005	Mullakhodzhaev Timur Ismajlkhodzhaevich Olifson Arkadij L'Vovich Tselishchev Georgij Konstantinovich	RU2286944C1
METHOD OF EXTRACTING MOLYBDENUM-99 FROM SOLUTION OF IRRADIATED URANIUM TARGETS	2013	Baranov Sergej Vasil'Evich Batorshin Georgij Shamilevich Bugrov Konstantin Vladimirovich Logunov Mikhail Vasil'Evich Voroshilov Jurij Arkad'Evich Jakovlev Nikolaj Gennad'Evich Murzin Andrej Anatol'Evich Zil'Berman Boris Jakovlevich Goletskij Nikolaj Dmitrievich Blazheva Irina Vladimirovna Kudinov Aleksandr Stanislavovich Agafonova-Moroz Marina Sergeevna Fedorov Jurij Stepanovich	RU2545953C2
EXTRACTION SEPARATION OF ZIRCONIUM AND HAFNIUM	2012	Zil'Berman Boris Jakovlevich Kardapolov Aleksandr Viktorovich Koparulina Elena Semenovna Likhacheva Ol'Ga Gennad'Evna Moskalenko Oleg Petrovich Sviridov Aleksandr Mikhajlovich Starchenko Vadim Aleksandrovich Shtutsa Mikhail Georgievich	RU2521561C2
METHOD OF PROCESSING HIGH-ACTIVITY WASTE WITH FRACTIONATION OF RADIONUCLIDES	2019	Khaperskaya Anzhelika Viktorovna Merkulov Igor Aleksandrovich Seelev Igor Nikolaevich Alekseenko Vladimir Nikolaevich Goletskij Nikolaj Dmitrievich Zilberman Boris Yakovlevich Naumov Andrej Aleksandrovich Kamaeva Elena Andreevna Petrov Yurij Yurevich Blazheva Irina Vladimirovna	RU2709826C1
METHOD FOR TREATMENT OF WET-PROCESS PHOSPHORIC ACID	2003	Grinevich A.V. Levin B.V. Moshkova V.G. Korneva Z.N. Tokmakova T.V.	RU2233239C1

RU 2 191 745 C1

Authors

Zajtsev B.N.

Zil'Berman B.Ja.

Kvasnitskij I.B.

Kesojan G.A.

Romanovskij V.N.

Dates

2002-10-27—Published

2001-04-25—Filed