PROCESS FOR THE REMOVAL OF MERCURY FROM GASES

• US 3,838,190 A
• Filed: 01/10/1972
• Issued: 09/24/1974
• Est. Priority Date: 01/14/1971
• Status: Expired due to Term

• Current Assignee: Birke L, Dyvik F, Eystein I, Jebens A
• Original Assignee: Birke L, Dyvik F, Eystein I, Jebens A
• Inventors: EYSTEIN I, DYVIK F, BIRKE L, JEBENS A
• Application Number:
  US05/216,807
• Time in Patent Office: 988 Days
• US Class Current: 423/210
• CPC Class Codes: B01D 53/64 Heavy metals or compounds thereof, e.g. mercury
• CPC Class Codes: C01G 13/04 Halides

Abstract

REMOVAL OF MERCURY FROM GASES, IN PARTICULAR GASES FROM COMBUSTION OR ROASTING, IS ACHIEVED BY WASHING THE GASES WITH SULPHURIC ACID OF AT LEAST 5% HAVING A TEMPERATURE OF 60 TO 180* C. THE WASHING ACID AND THE GASES CONTAIN CHLORIDE OR CHLORINE COMPOUNDS OR BOTH CHLORINE AND CHLORINE COMPOUNDS IN SUCH AN AMOUNT THAT THE ATOMIC RATIO C1/HG IS AT LEAST 1:1. PRACTICALLY ALL MERCURY AND OTHER MERCURY COMPOUNDS ARE CONVERTED TO MERCURY CHLORIDES WHICH ARE SEPARATED BY CONDENSATION IN A SUCCEEDING COOLING OF THE GAS.

Claims