METHOD FOR RECOVERY OF PLATINUM METAL-CONTAINING SLUDGE Russian patent published in 2005 - IPC

Abstract RU 2245383 C1

FIELD: sludge recovery from surface depositions of chemical equipment.

SUBSTANCE: invention relates to method for recovery of sludge containing platinum-group metals from equipment using platinum metal-based catalysts. Method includes treatment with aqueous solution of active chemical agent (e.g. sodium-ammonium-substituted ethylenediaminetetraacetic salts) while controlling pH value and removing sludge retained on treated surface with diluted aqueous solution of mineral salts or mixture thereof. pH value is adjusted at 2-10, preferably at 3-9 by adding of organic acid selected from group containing citric, oxalic, maleic, phthalic, adipic, glutaric, succinic acids or basic agents selected from sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate, and hydrochloric acid, sulfuric acid or phosphoric acid is used as mineral acid.

EFFECT: recovery platinum-group metal with improved yield.

4 cl, 1 tbl, 12 ex

Similar patents RU2245383C1

Title	Year	Author	Number
METHOD OF EXTRACTION OF SLUDGE CONTAINING METALS OF PLATINUM GROUP	2002	Konbenkov V.R. Makarov S.B. Mochalov M.A.	RU2221061C1
METHOD FOR HYDRODYNAMIC CLEANING OF SURFACES OF CHEMICAL ENGINEERING EQUIPMENT FROM SLUDGE CONTAINING PLATINUM GROUP METALS	2021	Trokhinin Aleksandr Vladimirovich Trokhinin Vladimir Aleksandrovich Udalova Iuliia Aleksandrovna Koshevaia Kristina Aleksandrovna	RU2758964C1
METHOD OF HYDRODYNAMIC CLEARING SURFACES OF CHEMICAL-TECHNOLOGICAL EQUIPMENT FROM SLUDGES CONTAINING METALS OF PLATINUM GROUP	2017	Trokhinin Aleksandr Vladimirovich Trokhinin Vladimir Aleksandrovich Udalova Yuliya Aleksandrovna Trokhinina Kristina Aleksandrovna	RU2639371C1
METHOD OF RECOVERY OF SLIME CONTAINING METALS OF PLATINUM GROUP	1996	Chernyshev Valerij Ivanovich[Ru] Gertsovskij Vadim Arkad'Evich[Ru] Tararykin Aleksandr Gennad'Evich[Ee] Chvokin Nikolaj Aleksandrovich[Ru]	RU2083261C1
METHOD OF HYDRODYNAMIC CLEANING OF SURFACES OF CHEMICAL-ENGINEERING EQUIPMENT FROM SLUDGES CONTAINING PLATINUM GROUP METALS	2018	Trokhinin Aleksandr Vladimirovich Trokhinin Vladimir Aleksandrovich Udalova Yuliya Aleksandrovna Koshevaya Kristina Aleksandrovna	RU2681189C1
FLOTATION USING ACTIVATOR MADE UP OF METAL ORGANIC COMPLEX	2007	Vilkhonen David Martinus Luis Lubbe Leon	RU2424855C2
METHOD OF HEAT-TRANSFER SURFACE CLEANSING	1990	Lavrov A.V. Moskvin L.N. Krivobokov V.V. Andrianov A.K.	SU1774669A1
METHOD OF ELECTROCHEMICAL DECONTAMINATION OF SPENT RADIOACTIVE ION-EXCHANGE RESINS	2020	Tokar Eduard Anatolevich Matskevich Anna Igorevna Palamarchuk Marina Sergeevna Egorin Andrei Mikhailovich	RU2748055C1
PRECIOUS METAL RECOVERY METHOD	2002	Sinegribov V.A. Judina T.B. Smetannikov A.F. Krasnoshtejn A.E.	RU2235140C2
PROCEDURE FOR EXTRACTION OF METALS OF PLATINUM GROUP FROM PLATINUM CONTAINING RAW STOCK	2009	Petrov Georgij Valentinovich Andreev Jurij Vladimirovich Grejver Tat'Jana Naumovna Kovalev Viktor Nikolaevich	RU2415954C1

RU 2 245 383 C1

Authors

Kuznetsov Artur Arturovich

Gertsovskij V.A.

Turkova T.V.

Dates

2005-01-27—Published

2003-06-03—Filed