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1. (US20180142324) Method for purifying metallic sodium

Office : United States of America
Application Number: 15564332 Application Date: 29.01.2016
Publication Number: 20180142324 Publication Date: 24.05.2018
Grant Number: 10316390 Grant Date: 11.06.2019
Publication Kind : B2
Prior PCT appl.: Application Number:PCTJP2016052635 ; Publication Number: Click to see the data
IPC:
B01D 8/00
C22B 9/02
C23G 5/00
B01D 53/14
C22B 26/10
C22B 5/16
C22B 9/00
F01L 3/14
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
8
Cold traps; Cold baffles
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
9
General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
02
Refining by liquating, filtering, centrifuging, distilling or supersonic wave action
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
G
CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
5
Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
14
by absorption
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
26
Obtaining alkali, alkaline earth metals or magnesium
10
Obtaining alkali metals
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
5
General processes of reducing to metals
02
Dry processes
16
with volatilisation or condensation of the metal being produced
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
9
General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
L
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
3
Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
12
Cooling of valves
14
by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
CPC:
B01D 8/00
C22B 26/10
B01D 53/1493
C22B 9/02
C23G 5/00
B01D 2257/70
C22B 5/16
C22B 9/006
F01L 3/14
Applicants: NITTAN VALVE CO., LTD.
SUKEGAWA ELECTRIC CO., LTD.
Inventors: Shigeru Uchida
Ryo Onose
Koichi Homma
Kuniaki Miura
Masashige Hanawa
Agents: Roberts Mlotkowski Safran Cole & Calderon P.C.
Priority Data:
Title: (EN) Method for purifying metallic sodium
Abstract: front page image
(EN)

It is preferable that metallic sodium to be loaded to an engine valve used for an internal combustion engine such as automobile engine have high purity. However, conventionally, an organic solvent remaining in micropores on a surface of the metallic sodium have been hardly attracted attention. Provided is a method for purifying metallic sodium including steps of placing metallic sodium containing organic solvent in the micropores thereof in a melting tank which is sealed, and heating the melting tank under reduced pressure to vaporize and remove the organic solvent coating the metallic sodium.


Also published as:
CN107208182JPWO2017130375WO/2017/130375