| 摘要 |
<p>The use of a 1-35%, by weight, aqueous solution of a composition of sodium pyrosulfite and sodium sulfite at a pressure of approximately one atmosphere and a temperature of 75 DEG -155 DEG F. to remove substantially all sulfur dioxide from gas streams containing the same. The sulfur dioxide-containing gas stream is placed in intimate contact with a plurality of progressively decreasing concentrations of said aqueous solution. Additionally, as the relative strength of successive aqueous solutions is decreased, the relative concentration of sodium pyrosulfite to sodium sulfite within each aqueous solution is inverted. That is, the first, or strongest, aqueous solution includes the largest ratio of sodium pyrosulfite to sodium sulfite, and the last, or weakest, aqueous solution includes the smallest ratio of sodium pyrosulfite to sodium sulfite.</p> |
