发明名称 |
PRODUCTION OF SODIUM SULFITE |
摘要 |
<p>Anhydrous sodium sulfite is made by process involving introducing substantially anhydrous sodium carbonate concurrently with sulfur dioxide-containing gas into a saturated solution of sodium sulfite maintained at pH of between about 6.5 and about 7.6 at temperature above about 35.degree.C. to form a slurry of anhydrous sodium sulfite crystals, and withdrawing the crystals from the slurry. The process is initiated using a concentrated sodium sulfite solution containing less than about 3 ppm of dissolved iron. iron.</p> |
申请公布号 |
CA1093786(A) |
申请公布日期 |
1981.01.20 |
申请号 |
CA19770270648 |
申请日期 |
1977.01.28 |
申请人 |
ALLIED CHEMICAL CORPORATION |
发明人 |
HOFFMAN, ROBERT J.;BEAN, SAMUEL L.;SEELING, PHILIP;SWAINE, JAMES W., JR. |
分类号 |
C01B17/98;C01D5/00;C01D5/14;(IPC1-7):01D5/14 |
主分类号 |
C01B17/98 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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