Invention Grant
- Patent Title: Process for production of particulate ruthenium
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Application No.: US16083911Application Date: 2017-04-18
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Publication No.: US10913120B2Publication Date: 2021-02-09
- Inventor: Vasco Thiel , Marco Stemmler , Hermann Von Eiff , Christian Kraushaar , Jan Roder , Christoph Rohlich
- Applicant: Heraeus Deutschland GmbH & Co. KG
- Applicant Address: DE Hanau
- Assignee: Heraeus Deutschland GmbH & Co. KG
- Current Assignee: Heraeus Deutschland GmbH & Co. KG
- Current Assignee Address: DE Hanau
- Agency: Blank Rome LLP
- Priority: EP16169646 20160513
- International Application: PCT/EP2017/059102 WO 20170418
- International Announcement: WO2017/194269 WO 20171116
- Main IPC: B22F9/22
- IPC: B22F9/22 ; B22F9/24 ; C22B3/00 ; C23C14/34 ; B22F1/00 ; B22F3/105

Abstract:
Process for the production of particulate ruthenium with a purity of ≤99.99 wt. % and a specific surface area of 0.2-0.5 m2/g, comprising: (1) providing a hydrochloric solution prepared by dissolving RuO4 in hydrochloric acid and has a content of ruthenium in the form of dissolved ruthenium species of 15-22 wt. %; (2) providing an aqueous solution with an ammonium chloride content of 200-600 g/litre; (3) forming a reaction mixture by dosing the hydrochloric solution provided in step (1) to the aqueous solution provided in step (2) at a molar ratio of 1 mol ruthenium: 3-6 mol ammonium chloride, at a temperature of 55-90° C. over the course of 0.2-5 hours and while adjusting and maintaining a pH of −0.6 to 0; (4) separating solid material formed during step (3) from the hydrochloric reaction mixture; and (5) calcinating the solid material separated in step (4) at an object temperature of 350-1,000° C.
Public/Granted literature
- US20190070666A1 PROCESS FOR PRODUCTION OF PARTICULATE RUTHENIUM Public/Granted day:2019-03-07
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