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1. (WO2018060202) IMPROVED SOLDER AND METHOD FOR PRODUCING HIGH PURITY LEAD

Pub. No.:    WO/2018/060202    International Application No.:    PCT/EP2017/074393
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Wed Sep 27 01:59:59 CEST 2017
IPC: C22C 11/10
B23K 35/26
Applicants: METALLO BELGIUM
Inventors: GOVAERTS, Koen
LEMMENS, Pelle
MANNAERTS, Kris
GORIS, Dirk
DE VISSCHER, Yves
GEENEN, Charles
COLETTI, Bert
Title: IMPROVED SOLDER AND METHOD FOR PRODUCING HIGH PURITY LEAD
Abstract:
Disclosed is a metal mixture composition containing lead and tin, and comprising by weight at least 10% tin and 45% lead, at least 90% of tin and lead together, more lead than tin, from 1-5000 ppm of copper, at least 0.42% antimony and at least 0.0001%wt of sulphur, at most 0.1% of the total of chromium, manganese, vanadium, titanium and tungsten, and at most 0.1 % of each one of aluminium, nickel, iron and zinc. Disclosed is also a process comprising a pre-treatment step for producing this metal mixture composition, followed by a vacuum distillation step wherein lead is removed by evaporation and a bottom stream is obtained comprising at least 0.6%wt of lead.