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首页> 外文期刊>Organic process research & development >Optimization of the Neutralization Process for Cesium Catalyst Removal after Polyol Production
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Optimization of the Neutralization Process for Cesium Catalyst Removal after Polyol Production

机译：多元醇生产后脱除铯催化剂的中和工艺的优化

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The aim of this study was the optimization of the neutralization process to remove the catalyst cesium hydroxide from crude polyether polyols. Sulfuric acid was chosen as the neutralization agent. First of all, the water content in the neutralization agent solution was optimized. An optimum particle size was obtained for water content between 2 and 3 wt %, and even the cesium content fell within the specifications. Higher water contents cause the solubilization of the cesium sulfate crystals. An increase in the temperature decreased the cesium sulfate particle size, not being retained by the filter and increasing the final polyol cesium content. Acidity was not within specifications whatever the temperature, varying between 0.18 and 0.22 mg of KOH/g. To obtain both parameters (cesium content and acidity) within specification, temperature and time of the dehydration step were modified. An excess of H2SO4 allowed us to obtain a suitable particle size for filtration; however, the acidity value was out of specification, suggesting the necessity to find a new process to remove the catalyst in the polyether polyol production.
机译：这项研究的目的是优化中和工艺以从粗聚醚多元醇中除去催化剂氢氧化铯。选择硫酸作为中和剂。首先，优化了中和剂溶液中的水含量。对于水含量在2-3wt％之间，获得了最佳的粒度，甚至铯含量也落在规格内。较高的水含量导致硫酸铯晶体的溶解。温度的升高减小了硫酸铯的粒径，未被过滤器保留，并增加了最终多元醇铯的含量。无论温度如何，酸度均不在规格范围内，在0.18至0.22 mg KOH / g之间变化。为了获得规格内的两个参数（铯含量和酸度），对脱水步骤的温度和时间进行了修改。过量的硫酸使我们获得了合适的过滤粒径。但是，酸度值超出规格，这表明有必要寻找一种新方法来除去聚醚多元醇生产中的催化剂。

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