复合矿物功能掺合料对粉煤灰激活增强的研究

根据激发粉煤灰活性机理研制了一种复合矿物功能掺合料,针对其对粉煤灰活性激发增强效果进行了系统研究。结果表明,用Ⅱ级粉煤灰、复合矿物功能掺合料置代50%以上水泥配制的胶砂、普通混凝土和高性能混凝土的早期强度、后期强度均大幅度提高。其中强度等级C15-C100 的混凝土不仅单方可节约水泥 50%以上,而且其强度较单掺粉煤灰有显著提高,具有显著的经济和社会效益。     

异氰酸酯改性光敏水性环氧丙烯酸酯的合成

以双酚A型环氧树脂与丙烯酸反应合成了具有羟基侧基的环氧丙烯酸酯，再用甲苯二异氰酸酯与内烯酸-β-羟乙酯的半加成物对上述环氧丙烯酸酯树脂进行接枝改性，再用酸酐引入羧基，经胺中和后，水性化．可得较为稳定的自乳化光敏树脂水分散体系。通过化学测试和IR解析．确定了合成条件、合成终点及产物结构，并以此为基料配成紫外光固化涂料，所得涂层性能优异。     

碘仿电解合成的工艺研究

开发了一种以石墨为阳极、铅为阴极、采用旋转阳极和离子膜分隔电解槽的碘仿电解合成的先进工艺 ,经过 5因素 4水平的正交试验 ,发现影响电流效率的各工艺因素中 ,阳极电流密度的影响最大 ,其次分别为阳极液温度 ,阳极液 p H值 ,阳极液中碘化钾的浓度和阳极转速。优化得到碘仿电合成的最佳工艺条件为 :碘化钾浓度 2 0 0 g· L- 1 ,阳极电流密度 2 5 A· dm- 2 ,阳极液温度为 2 0℃ ,阳极液 p H值为 9.5,阳极转速为2 0 0 r· min- 1 ,在此最佳工艺条件下 ,电流效率可达 97.2 3%。     

Enhanced Visible-Light Photocatalytic Degradation of Humic Acid by Palladium-Modified Nitrogen-Doped Titanium Oxide

Palladium-modified nitrogen-doped titanium oxide (TiON/PdO) nanoparticles were synthesized by a sol–gel process, for visible-light-induced photocatalysis using humic acid (HA) as a target. Our work shows that palladium modification has strong effects on the optical and photocatalytic properties of nitrogen-doped titanium oxide (TiON) photocatalysts. TiON/PdO nanoparticles demonstrated an enhanced photocatalytic activity over TiON within a narrow range of palladium concentration. Beyond this range, the adverse effect of palladium modification was observed in the visible-light-induced degradation of HA. The effects of palladium modification are discussed in terms of its role in controlling electron–hole recombination.     

一种高度炼化一体化的乙烯发展方案

简要介绍了三种炼化一体化新技术,由此提出了一种高度炼化一体化的乙烯发展方案,与常规的炼化一体化方案进行了对比分析,表明该方案的乙烯原料更加优质且轻质化,其丙烯/乙烯比可达1.1以上。     

单螺杆挤出过程的数值模拟

以三段七区物理模型为基础，采用面向对象程序设计语言VisualC ，对整个单螺杆挤出过程进行了数值模拟。所得压力。温度等工艺参数的模拟结果与实验值吻合较好，说明采用数学模型的正确性和数值算法的可行性。     

Continuous production of structured phospholipids in a packed bed reactor with lipase from <Emphasis Type="Italic">Thermomyces lanuginosa</Emphasis>

The possibilities of producing structured phospholipids between soybean phospholipids and caprylic acid by lipase-catalyzed acidolysis were examined in continuous packedbed enzyme reactors. Acidolysis reactions were performed in both a solvent system and a solvent-free system with the commercially immobilized lipase from Thermomyces lanuginosa (Lipozyme TL IM) as catalyst. In the packed bed reactors, different parameters for the lipase-catalyzed acidolysis were elucidated, such as solvent ratio (solvent system), temperature, substrate ratio, residence time, water content, and operation stability. The water content was observed to be very crucial for the acidolysis reaction in packed bed reactors. If no water was added to the substrate during reactions under the solvent-free system, very low incorporation corporation of caprylic acid was observed. In both solvent and solvent-free systems, acyl incorporation was favored by a high substrate ratio between acyl donor and phospholipids, a longer residence time, and a higher reaction temperature. Under certain conditions, the incorporation of around 30% caprylic acid can be obtained in continuous operation with hexane as the solvent. Presented at the 95th American Oil Chemists' Society Annual Meeting and Expo in Cincinnati, Ohio, May 10, 2004.     

塔板布置的计算机辅助设计

提供了一种简单而有效的利用计算机辅助进行塔板布置的方法。给出了相应的计算内容和程序。有较好的通用性。适用于浮阀塔板和筛孔塔板。     

加氢催化剂预硫化技术进展及其应用

叙述了加氢催化剂预硫化技术的发展及其反应原理，介绍了国内外几种新型加氢催化剂预硫化技术及应用。     

Decolorization of reactive brilliant red X-3B by heterogeneous photo-Fenton reaction using an Fe–Ce bimetal catalyst

Decolorization of reactive brilliant red X-3B was studied by using an Fe–Ce oxide hydrate as the heterogeneous catalyst in the presence of H₂O₂ and UV. The decolorization rate was in the order of UV–Fe–Ce–H₂O₂ > UV–Fe³⁺–H₂O₂ > UV–H₂O₂ > UV–Fe–Ce ≥ Fe–Ce–H₂O₂ > Fe–Ce. Under the conditions of 34 mg l⁻¹ H₂O₂, 0.500 g l⁻¹ Fe–Ce, 36 W UV and pH 3.0, 100 mg l⁻¹ X-3B could be decolorized at efficiency of more than 99% within 30 min. The maximum dissolved Fe during the reaction was 1 mg l⁻¹. From the fact that the decolorization rate of the UV–Fe–Ce–H₂O₂ system was significantly higher than that of the UV–Fe³⁺–H₂O₂ system at Fe³⁺ = 1 mg l⁻¹, it is clear that the Fe–Ce functioned mainly as an efficient heterogeneous catalyst. UV–vis, its second derivative spectra, and ion chromatography (IC) were employed to investigate the degradation pathway. Fast degradation after adsorption of X-3B is the dominant mechanism in the heterogeneous catalytic oxidation system. The first degradation step is the breaking down of azo and CN bonds, resulting in the formation of the aniline- and phenol-like compounds. Then, the breaking down of the triazine structure occurred together with the transformation of naphthalene rings to multi-substituted benzene, and the cutting off of sulphonic groups from the naphthalene rings. The last step includes further decomposition of the aniline structure and partial mineralization of X-3B.