阻燃尼龙66的研究进展

介绍了阻燃尼龙(PA)66近几年的研究进展,详细阐述了卤系阻燃剂、磷系阻燃剂、氮系阻燃剂及无机填料型阻燃剂等对PA66的阻燃效果及研究现状,并展望了阻燃PA66未来的发展方向.     

镁钙铝复合催化剂的制备及其在丙酮缩合中的性能

采用氨水为沉淀剂,共沉淀法制备了一系列MgCaAl复合酸碱氧化物催化剂.考察了催化剂的金属离子比、共沉淀时的溶液pH值、晶化温度、焙烧温度等条件对制备的催化剂在丙酮缩合制异佛尔酮反应中催化活性的影响.实验结果表明,所制备的复合固体催化剂在丙酮气相缩合制备异佛尔酮的反应中表现出良好的活性.在Mg/Ca/Al 物质的量比为...     

UASB-射流曝气CASS工艺处理屠宰废水

介绍了UASB+射流曝气CASS工艺处理屠宰废水方案选择的依据、工艺流程、设计要点、工艺参数、经济指标和其他环保措施.设计进水水质BOD5为1 100mg·L-1,COD为2400 mg·L-1,ρ(SS)为600 mg·L-1,ρ(NH3-N)为65 mg·L-1,大肠杆菌总数为1.0×105～1.7×105 L-1.处理后的污水达到GB 13457-92中畜类屠宰加工一级标准的排放要求.     

膜结构和DOM相对分子质量分布对城市二级出水超滤过程的影响

考察了膜孔径、膜孔隙率以及水中溶解性有机物( DOM)相对分子质量分布对二级出水超滤膜过程的影响.结果表明,膜孔孔径对膜污染特性有一定影响,孔径越大,则膜纯水通量越大,单位时间在膜表面和膜孔内形成污染的有机物也越多,膜污染也越严重,导致通量衰减幅度较大;对于膜孔径相近的膜来说,孔隙率大意味着水通量大,过滤过程对膜产生的...     

中国盐湖资源的开发历程及现状

对中国盐湖资源的研究和产业化现状进行了阐述,着重分析了盐湖资源的分布状态、发展历程、技术现状及其存在问题和解决对策,以及科研和产业化的发展方向。通过对国内盐湖的研究和产业化的分析表明,盐湖资源开发利用的前景十分广阔,但盐湖的开发要注意资源的综合利用,目前要在提取工业钾盐的基础上大力发展镁盐工业,逐步提高锂、硼及其他稀散资源的利用能力,并且在今后的发展中也要重视非化学资源的开发。     

影响螺旋啮合冷喂料挤出机生产能力因素的实验与分析

通过中120螺旋啮合冷喂料挤出机中螺杆转速、喂料量以及销钉排数等因素对挤出机生产能力影响的实验研究获得了一系列数据,同时对其结果进行了定性分析。为挤出机的选型、设计和使用操作提供了参考依据。     

Situation of Newly Building and Expanding EPR Equipment in China

In order to fill up the blank of domestic market demand and further occupy the domestic market,a set of EPR production equipment with the annual capacity of 50,000 tons is being built by Jilin Petrochemical Company,and the equipment with the annual capacity of 25,000 tons in the second phase is under construction, and all equipment will be completed and put into production in 2011.Nanjing Chemical Industry Park plans to build EPR production equipment with the annual capacity of 50,000 tons;Beijing Petrochemical Industry Base of New Materials Technology plans to construct EPDM production equipment     

Comparing large colour‐difference data sets

This study investigated the differences between different large colour‐difference (LCD) data sets (with a mean ΔE value about 10). Six data sets were studied. For each data set, various CIELAB based colour difference models were derived to fit the data. These models were compared to shed light on the difference between the different data sets. It was found that all data sets have very similar characteristics except for the Munsell data. Detailed investigation showed that the discrepancy is mainly due to the balance between the lightness and chromatic differences used previously for the Munsell data set. It was found that one unit of Munsell Value appears to be three times as large colour difference as one unit of Munsell Chroma at least under the experimental conditions for the data sets studied here. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2011     

Kinetics and Efficiency Analysis of Electrochemical Oxidation of Phenol: Influence of Anode Materials and Operational Conditions

The influence of operational parameters and anode materials on degradation kinetics, mineralization current efficiency, and energy consumption for electrochemical oxidation of phenol was studied. Phenol elimination follows pseudo‐first‐order kinetics in most cases except for the Ti/RuO₂ anode with a phenol concentration of 500 mg L^–1, where pseudo‐zero‐order kinetics is observed. The total organic carbon removal by a Ti/Sb‐SnO₂ anode follows pseudo‐first‐order kinetics in contrast to pseudo‐zero‐order kinetics by Pt and Ti/RuO₂ anodes. For a certain anode, a higher current or voltage input results in a higher reaction rate. With a Ti/Sb‐SnO₂ anode, the highest current efficiency and the lowest energy consumption are obtained, but the current efficiency decreases (increases for energy consumption) quickly as the reaction is prolonged due to the reduction of organics.     

Poly(para‐dioxanone)/poly(D,L‐lactide) blends compatibilized with poly(D,L‐lactide‐co‐para‐dioxanone)

The effect of poly(D ,L ‐lactide‐co‐para‐dioxanone) (PLADO) as the compatibilizer on the properties of the blend of poly(para‐dioxanone) (PPDO) and poly(D ,L ‐lactide) (PDLLA) has been investigated. The 80/20 PPDO/PDLLA blends containing from 1% to 10% of random copolymer PLADO were prepared by solution coprecipitation. The PLADO component played a very important role in determining morphology, thermal, mechanical, and hydrophilic properties of the blends. Addition of PLADO into the blends could enhance the compatibility between dispersed PDLLA phase and PPDO matrix; the boundary between the two phases became unclear and even the smallest holes were not detected. On the other hand, the position of the T_g was composition dependent; when 5% PLADO was added into blend, the T_g distance between PPDO and PDLLA was shortened. The blends with various contents of compatibilizer had better mechanical properties compared with simple PPDO/PDLLA binary polymer blend, and such characteristics further improved as adding 5% random copolymers. The maximum observed tensile strength was 29.05 MPa for the compatibilized PPDO/PDLLA blend with 5% PLADO, whereas tensile strength of the uncompatibilized PPDO/PDLLA blend was 14.03 MPa, which was the lowest tensile strength. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011