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Recovery of sulfur values from flue gases with oxidized neutral sulfite green liquor

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专利汇可以提供Recovery of sulfur values from flue gases with oxidized neutral sulfite green liquor专利检索,专利查询,专利分析的服务。并且A process for the utilization of sulfur compounds in spent pulping liquors and flue gases, said process including the oxidation of neutral sulfite green liquor with air or oxygen under heat and pressure to form an alkaline solution containing sodium sulfate, sodium thiosulfate, sodium sulfite, sodium hydroxide and sodium carbonate, suitable for recovery of sulfur dioxide from flue gases to obtain a product liquor suitable for use in a pulping process.,下面是Recovery of sulfur values from flue gases with oxidized neutral sulfite green liquor专利的具体信息内容。

  • 2. scrubbing furnace flue gases containing SO2 with the oxidized green liquor of Step 1 to absorb the SO2.
  • 2. A process as defined in claim 1 in which at least 15 percent but less than 70 percent of the sodium sulfide has been converted to sodium sulfate.
  • 3. A process as defined in claim 1 in which the green liquor has the following approximate composition: COMPONENT MOLAR PERCENT (Based on Na2O) Na2S 38.02 Na2S2O3 1.83 Na2SO3 0.73 Na2CO3 59.41 and the oxidizing time in Step 1 is about 15 to 60 minutes.
  • 4. A process as defined in claim 3 in which the oxidized green liquor has the following approximate composition: COMPONENT MOLAR PERCENT (Based on Na2O) Na2S 0.85 Na2S2O3 10.54 Na2SO3 1.19 Na2CO362.41 Na2SO4 19.80 NaOH 5.21
  • 5. A process as defined in claim 1 in which green liquor is oxidized in Step 1 at a temperature from about 70* F. to 370* F. and a pressure of about 20 to 200 p.s.i.
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