The effects of glycol methacrylate as a dehydrating agent on the dimensional changes of liver tissue

The dimensional changes of liver sections during the course of processing with glycol methacrylate (GMA) or with ethanol are described. Tissue processing with ethanol served as a control. During prolonged processing steps (24 h each), linear shrinkage of tissue specimens dehydrated with GMA at room temperature was 13.2%. Subsequent infiltration with GMA resulted in trivial swelling, and polymerization in slight shrinkage (2.3%). In comparison, processing with cold GMA resulted in shrinkage during dehydration (about 10.8%), a slight swelling in pure GMA, followed by shrinkage during polymerization (2.2%). Short routine processing schedules resulted in similar shrinkage/swelling patterns, although precise values differed slightly. In all experiments, ethanolic dehydration resulted in smaller dimensional tissue changes than did GMA dehydration. The dimensional changes of tissue sections during stretching on water, mounting and drying compensated for the major part of the shrinkage manifested during processing.     

SnO催化合成环烷酸乙二醇酯增塑剂的研究

介绍了用SnO非酸性催化剂催化合成环烷酸乙二醇酯增塑剂(NAEP)的方法。讨论了反应温度、醇酸摩尔比、催化剂用量和反应时间等因素对酯化反应的影响,给出了适宜的工艺条件。 NAEP应用于PVC电缆料及丁腈橡胶配方中取得了良好的效果。与邻苯二甲酸酯增塑剂相比,具有更好的经济价值。     

二甘醇或乙二醇连续催化合成1，4－二氧六环

采用连续法合成１，４ 二氧六环。以二甘醇为原料，温度２４０℃，催化剂初始浓度：硅钼酸３％，或硫酸铁３％，或硅钨酸银２％；连续补加浓度：硅钼酸１％，硫酸铁１％，硅钨酸银０５％；以乙二醇为原料，温度１９０℃，催化剂初始浓度：硅钼酸４％，或硫酸铁３５％，或硅钨酸银２％；补加浓度：硅钼酸１５％，硫酸铁１５％，硅钨酸银１％；控制塔顶温度为９５～１０５℃，反应速度快，产率较高。     

Oxidation by UV and Ozone of Organic Contaminants Dissolved in Deionized and Raw Mains Water

Organic contaminants dissolved in deionized pretreated and raw mains water were reacted with ultraviolet light and ozone. Ozone first was used for partial oxidation followed by ozone combined with ultraviolet radiation to produce total oxidation. The reduction of TOC level and direct oxidation of halogenated compounds were measured throughout the treatment process. The rate of TOC reduction was compared for ozone injected upstream and inside the reactor.     

乙二醇活性炭过滤器的改造

通过分析乙二醇加注泵停泵原因,改变了乙二醇过滤的思路.在该思路下停用活性炭过滤器并将其改造为机械过滤器后,乙二醇过滤效果良好,加注泵停机率减少,大幅降低了员工维护劳动强度,保证了产品稳定生产.改造成功实现设备废旧利用,节约了生产成本,实现了效益最大化.     

用ZSM-5沸石催化剂合成二(口恶)烷的研究

用ZSM-5沸石分子筛催化剂在气固相催化反应器中进行二甘醇脱水环化制取二噁烷的研究,实验结果表明研制的ZSM-5沸石分子筛催化剂具有良好的催化活性和选择性,二甘醇转化率和二噁烷选择性均>90％,且具有良好的活性稳定性及再生重复性。该催化剂用于制取二噁烷的最佳反应温度为270～280℃,二甘醇进料重量空速为1～1.5h~(-1)。     

基于风险的检验（RBI）在乙烯企业的应用

对某乙烯企业中的环氧乙烷/乙二醇（EOEG）装置和低密度聚乙烯（LDPE）装置进行基于风险的检验（RBI）分析.根据风险评估结果,识别出装置设备和管道的损伤模式、机理和检验周期,制定了检验策略,为装置的定期检验提供参考.     

含催化剂的乙二醇和二甘醇黏度测定及关联

在常压、313-413K下，采用NDJ-1旋转式黏度计，测定了含NY2催化剂的乙二醇和二甘醇的黏度．采用黏度Andrade关系式，将黏度数据与NY2催化剂质量分数和温度进行关联，得到经验关系式．结果表明，由经验方程计算值与实验结果基本相符，为催化水合制乙二醇的反应器设计和优化分离设备提供必要的基础数据．     

A Fuel‐Flexible Alkaline Direct Liquid Fuel Cell

We constructed a fuel‐flexible fuel cell consisting of an alkaline anion exchange membrane, palladium anode, and platinum cathode. When an alcohol fuel was used with potassium hydroxide added to the fuel stream and oxygen was the oxidant, the following maximum power densities were achieved at 60 °C: ethanol (128 mW cm⁻²), 1‐propanol (101 mW cm⁻²), 2‐propanol (40 mW cm⁻²), ethylene glycol (117 mW cm⁻²), glycerol (78 mW cm⁻²), and propylene glycol (75 mW cm⁻²). We also observed a maximum power density of 302 mW cm⁻² when potassium formate was used as the fuel under the same conditions. However, when potassium hydroxide was removed from the fuel stream, the maximum power density with ethanol decreased to 9 mW cm⁻² (using oxygen as oxidant), while with formate it only decreased to 120 mW cm⁻² (using air as the oxidant). Variations in the performance of each fuel are discussed. This fuel‐flexible fuel cell configuration is promising for a number of alcohol fuels. It is especially promising with potassium formate, since it does not require hydroxide added to the fuel stream for efficient operation.     

较高分子量聚乙二醇合成研究

目前较高分子量的聚乙二醇尚需进口。本文利用碱催化剂合成了工业上极有用的聚乙二醇6000和聚乙二醇8000。