-
1.发明公开DETERMINATION AND CONTROL OF EFFECTIVE ALKALI IN KRAFT LIQUORS BY IR SPECTROSCOPY 失效确定并通过红外光谱法的手段控制硫酸盐法制浆的解决方案的有效碱。
公开(公告)号：EP0649531A1
公开(公告)日：1995-04-26
申请号：EP93915594.0
申请日：1993-07-06
CPC分类号： D21C3/02 , D21C7/12 , G01N21/3577 , G01N33/34
摘要： A direct monitoring and control method is provided for on-line measurement of effective alkali, carbonate, sulfate and thiosulfate concentrations in process liquors for the production of kraft pulp. The control method eliminates frequent sampling, and the need for frequent equipment maintenance. The method includes the steps of withdrawing samples of a liquor from the kraft manufacturing process, subjecting the samples to infrared spectrophotometry at predetermined wave numbers to produce peak-absorbance measurements relative to a background spectrum of water, determining peak absorbance for different alkali concentrations, correlating relationships between the peak-absorbance measurements of samples with the peak absorbance for different alkali concentrations to determine optimum effective alkali in the samples, and controlling at least one process parameter to obtain effective alkali of the liquor.
-
2.发明授权DETERMINATION AND CONTROL OF EFFECTIVE ALKALI IN KRAFT LIQUORS BY IR SPECTROSCOPY 失效确定并通过红外光谱法的手段控制硫酸盐法制浆的解决方案的有效碱
公开(公告)号：EP0649531B1
公开(公告)日：1996-10-02
申请号：EP93915594.1
申请日：1993-07-06
CPC分类号： D21C3/02 , D21C7/12 , G01N21/3577 , G01N33/34
摘要： A direct monitoring and control method is provided for on-line measurement of effective alkali, carbonate, sulfate and thiosulfate concentrations in process liquors for the production of kraft pulp. The control method eliminates frequent sampling, and the need for frequent equipment maintenance. The method includes the steps of withdrawing samples of a liquor from the kraft manufacturing process, subjecting the samples to infrared spectrophotometry at predetermined wave numbers to produce peak-absorbance measurements relative to a background spectrum of water, determining peak absorbance for different alkali concentrations, correlating relationships between the peak-absorbance measurements of samples with the peak absorbance for different alkali concentrations to determine optimum effective alkali in the samples, and controlling at least one process parameter to obtain effective alkali of the liquor.
-
搜索结果
2 条记录 (耗时 0.01 秒)
