IMPROVED TIN PRODUCTION, WHICH INCLUDES A COMPOSITION COMPRISING TIN, LEAD, SILVER AND ANTIMONY

WIPO Patent Application WO/2020/157167

A3

Disclosed is a process for the separation by fractional crystallisation (300) of a molten crude tin mixture (8) containing lead and silver, into a first silver-enriched liquid drain product (9) at the liquid end of the crystallisation step and a first tin-enriched product (10) at the crystal end of the crystallisation step whereby the first silver-enriched liquid drain product comprises on a dry weight basis 6.0-30.0%wt of lead, 70.0-91 %wt of tin, 95.0- 99.0%wt of lead and tin together, 0.75-5.00%wt of silver, and ≥0.24%wt of antimony. Further disclosed is a metal composition (9) comprising 6.0-30.0%wt of lead, 70.0-91 %wt of tin, 95.0-99.0%wt of lead and tin together, 0.75-5.00%wt of silver, and ≥0.24%wt of antimony.

GOVAERTS KOEN (BE)
LEMMENS PELLE (BE)
MANNAERTS KRIS (BE)
GORIS JAN (BE)
DE VISSCHER YVES (BE)
GEENEN CHARLES (BE)
COLETTI BERT (BE)

PCT/EP2020/052225

September 10, 2020

January 30, 2020

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METALLO BELGIUM (BE)

C22B9/02; B01D3/14; C22C13/00

EP0507718A1	1992-10-07
US5690890A	1997-11-25
DE10153974A1	2003-05-15
CN102534249A	2012-07-04
JP2004223571A	2004-08-12
JPH10180482A	1998-07-07

TAGUCHI T ET AL: "Lead free interfacial structures and their relationship to au plating (including accelerated thermal cycle testing of non-leaden BGA spheres)", ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE, 2001. PROCEEDINGS., 5 1ST MAY 29 - JUN 1, 2001, PISCATAWAY, NJ, USA,IEEE, 29 May 2001 (2001-05-29), pages 668 - 673, XP010546183, ISBN: 978-0-7803-7040-1

GEVERS PATENTS (BE)

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