×

Process for recycling junk lead-acid batteries

  • US 4,118,219 A
  • Filed: 07/01/1977
  • Issued: 10/03/1978
  • Est. Priority Date: 02/19/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for recycling the paste and electrolyte of junk lead-acid batteries, said process comprising the steps of(a) separating the paste and electrolyte from the junk batteries,(b) reacting the paste and electrolyte to increase the lead sulfate content of the paste and reduce the acid content of the electrolyte,(c) mixing the resulting paste with an aqueous ammoniacal ammonium sulfae solution to dissolve a substantial portion of the lead sulfate from the paste,(d) separating the resulting pregnant lead solution from any solid materials therein,(e) and precipitating lead carbonate from the pregnant lead solution.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×