75%百菌清可湿性粉剂悬浮率稳定性研究

研究了影响７５％百菌清可湿粉悬浮率不稳定的因素，找到了提高悬浮率稳定性的方法并应用于生产。当百菌清原药含≥９２％，且原药中二腈含量≤０．４％时，热贮之后的悬浮率大于６０％；若百菌清原药含量〈９０％，且二腈含量≥２％时，热贮之后的悬浮率≤５０％。配方对悬浮率的稳定性影响很大。     

75%百菌清可湿性粉剂悬浮率的研究

考查了影响７５％百菌清可湿性粉剂浮率的各种因素，提出了提高悬浮率的方法。通过提高原药质量，造择适当的润湿性和稳定性，使百菌清可湿性粉剂热贮两周后的悬浮率仍达到６０％以上。     

低含量百菌清原药的提纯

低含量百菌清原药先经热水洗涤除去酸性物质和大部分的间苯二腈, 干燥后再用甲苯进行重结晶, 可获外观灰白色的百菌清原药。其百菌清含量≥９５ ％ 、间苯二腈含量≤０１ ％ 、收率≥６６ ％ 、甲苯回收率≥８６ ％ 。     

75%百菌清可湿性粉剂的研究

本文详细分析了百菌清原药含量、杂质和配方对７５％百菌清可湿粉悬浮率的影响，通过试验，提出了解决这一难题的方法。     

15%三唑酮可湿性粉剂悬浮率稳定性研究

通过对15％三唑酮可湿性粉剂不同配方悬浮率的研究发现．加入聚乙二醇6000，其热贮之后的悬浮率仍≥65％。     

70%苯菌灵水分散粒剂的研制

以悬浮率、分散性、崩解性、热贮稳定性为标准,通过对不同润湿分散剂、崩解剂、粘结剂的筛选,得到70%苯菌灵水分散粒剂的最佳制剂配方为:苯菌灵原药70%,润湿分散剂脂肪醇硫酸酯盐AS 6.0%,崩解剂硫酸铵3.0%,粘结剂聚乙二醇2.0%,高岭土19%,该水分散粒剂悬浮率≥90%,分散性良好,热贮稳定性合格。     

48%甲羧除草醚水悬剂配方研制

以悬浮率(≥90%)、筛析、分散性、热贮[(54±2)℃,14 d]稳定性为标准,通过对不同润湿分散剂、增稠剂的配方筛选,得到48%甲羧水悬剂。最佳配方为:甲羧原药48%,分散剂木钠3.5%,分散剂NNO 2.0%,润湿剂EFW 2.0%,乳化剂500#2.0%,增稠剂黄原酸胶0.1%,防冻剂乙二醇5.0%,水补足至100%。产品悬浮率≥90%,分散性良好,热贮稳定性合格。     

多抗霉素B10％可湿性粉剂的研制

以多抗霉素B原粉为原药,以白碳黑为填料,十二烷基硫酸钠、木质素磺酸钠、三聚磷酸钠为助剂,对10％多抗霉素B可湿性粉剂的悬浮率、润湿时间、细度进行测定并进行热贮稳定性试验,确定优化配方及加工工艺。     

20％丁烯氟虫腈水分散粒剂的配方研究

对20％丁烯氟虫腈水分散粒剂配方进行了研究，简述了该剂型的配方选择及贮存稳定性，确定了较佳的配方组成：丁烯氟虫腈20％，润湿剂十二烷基苯磺酸钠6％，分散剂NNO5％，崩解剂氯化钠6％，粘结剂可溶性淀粉2％，载体高岭土补至100％。试验结果表明：该产品的悬浮率为90％以上，崩解时间〈20s，热贮（54±2℃，14d）下的分解率〈4％，产品的各项指标符合水分散粒剂的标准。     

低含量百菌清原药的提纯

低含量百菌清原药先经热水洗涤除去性和大部分的间苯二腈，干燥后再用甲苯进行重结晶，可获外观灰白色的百菌清原药。     

Thermal stability of PVC/chlororubber-20-graft polyblend–styrene–acrylonitrile blends. I

Thermal stability of PVC blends with chlororubber-20-graft polyblend-styrene-acrylonitrile [CR-20gp-SAN (2:1)] was studied by HCI evolution techniques and thermogravimetry under isothermal condition. The thermal stability of PVC/CR-20gp-SAN (2:1) blends has been compared with those of PVC/CR-20 and PVC/KM-365B blends. It has been observed that the thermal stability of modified PVC is less than that of unmodified PVC. The CR-20gp-SAN (2:1) modified PVC blends were found to be more stable than PVC/CR-20 blends but less stable than PVC/KM-365B blends. The rate of degradation in PVC blends were observed to be unaffected by the concentration of the modifiers, but the PVC/KM-365B blends were found to be degrading slower in comparison with PVC/CR-20 and PVC/CR-20gp-SAN (2:1) blends. The rate of degradation for PVC/CR-20 blends at lower concentrations (<10%) of modifiers is almost equal to that of PVC/CR-20-gp-SAN (2:1) blends, but more at higher concentrations of modifiers (>10%). The experimental results have been explained on the basis of the chemical nature of the modifiers and their miscibility with PVC.     

吉林油田稠油热采污水处理絮凝剂室内试验研究

针对吉林油田稠油热采污水中的油含量高和悬浮质含量高,采用絮凝法处理稠油热采污水,并进行高效絮凝剂的筛选.在对含油污水成分分析的基础上,采用烧杯实验和分光光度法研究了絮凝剂的絮凝效果.筛选出了以无机絮凝剂硫酸铝与两性高分子聚合物CE-3090的复配体系,同时研究了影响絮凝效果的因素并探究了其影响机理.结果表明,在温度40℃,pH值7.72,170 r/min高速搅拌1 min,然后50 r/min低速搅拌5 min,硫酸铝的加量90 mg/L,CE-3090的加量0.5 mg/L,絮凝沉降30min后其絮凝效果较好.试验证明该复配处理剂处理含油污水后,含油量和杂质含量都达到了回注回用及排放标准.     

Solid-liquid separation in suspension atomization

The aim of this paper is to define the conditions controlling the fragmentation process within the atomization of a suspension. Correlations for the droplet diameter of a suspension spray generated by a twin-fluid nozzle have been derived. Two separate regimes in suspension atomization have been identified with respect to the solid particle size. The atomized droplets from suspensions containing relatively fine solid particles are suspension droplets (containing liquid and solid particles). In this case a correlation for the drop size distribution in the spray of a twin-fluid nozzle has been deduced. Droplet size measurements in the suspension spray with varying solid particle sizes showed that when the suspended solid particle size exceeds a critical value, solid particles and liquid will be more and more separated. This effect is indicated by a bimodal size distribution in the suspension spray. It is shown that complete solid-liquid separation in the suspension spray may be achieved, where the pure liquid drops are significantly smaller than the separated solid particles. The critical process conditions where the solid-liquid separation process is found will be derived. Depending on the operating conditions of the atomizer, the resulting pure liquid droplet size is equal or less than the hydraulic diameter.     

Suspension stability of solid particles in the presence of various types of electrolytes

Stabilities of titanium dioxide and ferric oxide suspensions in the presence of various types of electrolytes have been studied by measuring their sedimentation volume, rate of sedimentation and optical absorption as a measure of the degree of suspension. The stabilizing ability in suspensions with condensed phosphates is relatively high as compared with that with electrolytes other than the phosphates. This would indicate strong adsorption of phosphate ions onto the surface of the particle. A correlation is found between the extent of stability of a suspension and the electrophoretic mobility of the particle suspended in electrolyte solution, except with silicates. With polyphosphates (Na_n+2P_nO_3n+1) the stabilizing effect is noticeable at n≥2, while with metaphosphates (Na_nP_nO_3n) it becomes noticeable and constant at n≥4. The stabilities of titanium dioxide and ferric oxide suspensions containing silicates are high in spite of low electrophoretic mobilities of their suspended particles, which are comparable with the stability operated by tripolyphosphate or a typical dispersing agent. The suspension stability data of acid and neutral condensed phosphates and of the electrolytes used commonly as builders in the presence of a surfactant have also been included.     

硼泥复合混凝剂处理啤酒废水的研究

本文研究了硼泥复合混凝剂处理啤酒废水的影响因素和最佳处理条件。处理啤酒废水的 COD 1 0 0 0～ 2 5 0 0 mg/L ,SS 2 0 0～ 40 0 mg/L时 ,处理的最佳 p H值范围 6 .2～ 1 0 .3,最佳投药量范围 0 .4～ 0 .8g/L。COD去除率可达 71 %以上 ,SS去除率可达 93.5 %以上。搅拌速度、搅拌时间、温度对 COD及 SS去除率无显著影响。再经双层滤料过滤或曝气生化处理 ,出水达到污水排放标准     

高相对分子质量聚丙烯酰胺的制备及应用

通过微乳液法合成了高相对分子质量(Mr=1300万)、速溶的聚丙烯酰胺(PAM),采用FTIR及SEM对3种PAM结构进行了分析,并用PAM对武钢焦化厂和下陆炼铁厂废水中的悬浮物及COD的处理进行了研究。结果表明,实验合成的PAM溶解性能优于其他两种产品(溶解时间达到5 5min)。而且,实验合成的PAM对两种废水中悬浮物的去除效果等同或优于法国PAM,明显优于国内PAM。对焦化厂废水中悬浮物去除率达86 60%,炼铁厂废水悬浮物去除率高达97 48%。3种PAM对废水中的COD都有一定的去除效果,但去除率均低于60%。     

Phase equilibria and solution thermodynamics in the ternary system,poly(acrylic acid)-dioxane-water

The stability of solutions of poly(acrylic acid) in dioxane-water mixtures has been examined as a function of temperature and three phase boundaries have been located when water contents are less than 10 (wt/vol)%. These collapse into one boundary at higher water contents up to 25 (wt/vol)%. The cloud points have the characteristics of a quasi-LCST, a UCST, and an LCST, in order of increasing temperature, and this behaviour is comparable to the behaviour of poly(acrylic acid)-dioxane solutions. Measurements of the heat of dilution showed that this changes from being endothermic in dioxane solutions to exothermic in aqueous systems at temperatures below the quasi-LCST. Laser Raman spectra indicate the presence of hydrogen bonding between water and the polymer in the mixed solvent, which may explain the improved solvating power when water is added to dioxane.     

Thermal stability,aging properties,and flame resistance of NR‐based nanocomposite

Polymer/clay nanocomposites have some unique properties due to combination of flame resistance and improved mechanical and thermal stability properties which are important to enhance the material quality and performance. The objective of this work was to investigate the effect of organically modified montmorillonite (org‐MMT) on the thermal and flame retardant as well as hardness and mechanical properties of the nanocomposites based on the natural rubber (NR). It was shown that by the addition of 3 wt % of org‐MMT to NR, its aging hardness rise was decreased more than 55% and the ignition time was delayed about 150%. The reduction in heat release rate peak value was equal to 54% compared to the pristine NR. Addition of org‐MMT improved the thermal stability of the NR. Furthermore, nanocomposites which were calendared before curing showed much more thermal stability and fire resistance than those which contained similar amount of organoclay. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

固相法低度氯化聚乙烯的合成及其性能的研究

合成了几个系列氯含量≤30％的低度氯化聚乙烯(LCPE),讨论了氯含量、氯化温度、供氯速度、原料种类及分子量对LCPE力学性能、加工性能和耐油性能的影响。