豆油脚脂肪酸制备松香改性醇酸树脂的配方研究

利用豆油脚脂肪酸-松香-甘油-苯酐，采用脂肪酸法制备松香改性醇酸树脂。通过实验得到较佳工艺条件，确定经济合理的配方和各种原料用量，制备出符合标准的醇酸树脂产品，为加工成各色醇酸调合磁漆和脂肪酸调合磁漆奠定基础。此方法有效利用了废弃的大豆下脚料以代替市场紧缺的天然桐油和亚麻油，为豆油脚在涂料工业上的开发和利用开辟了新途径。     

Adaptive Linear Dynamic Matrix Control applied to an integrating process

Dynamic Matrix Control (DMC) has proven to be a powerful tool for optimal regulation of chemical processes under constrained conditions. It is based on a linear convolution model derived from step-response measurements. A model predictive control algorithm optimises closed-loop performance for a nominal operating point. However, as the process moves away from this point, control usually becomes sub-optimal due to process non-linearity. As seen in this work, the DMC algorithm can be made adaptive, to establish a new local model, by recursive estimation of the local step response parameters from normal plant variations. However, when used for control of plants containing integrating process units, steady-state offsets occur for sustained changes. Thus, a novel Adaptive Linear Dynamic Matrix Control (ALDMC) algorithm has been developed and used to control a 2-input/2-output system with an integrating behaviour. Comparisons of model control and plant control with and without these features demonstrated the importance of integral compensation for integrating processes, and model adaptation in the case of plant/model mismatch. Some cross-compensation of integration by the adaptive feature was also noted. An holistic technique is demonstrated which simultaneously recognises residual integration disturbances and matrix parameter variations, whereas previous techniques which recognise only one of these will fail in the presence of the other.     

细旦涤纶POY工艺优化探讨

通过对双板多孔122 dtex/144 f POY的纺丝工艺进行调整,探讨了干燥、纺丝、组件吹风冷却条件及卷绕工艺等对多孔细旦丝生产质量的影响。     

Preparation of stable polyurethane-polystyrene copolymer emulsions via RAFT polymerization process

Stable polyurethane-polystyrene (PU-PS) copolymer emulsions were prepared by the polymerization of 2-hydroxyethyl acrylate (HEA)-capped PU macromonomer and styrene, using azobis(isobutyronitrile) (AIBN), a radical initiator, and 4-((benzodithioyl)methyl)benzoic acid, a reversible addition-fragmentation chain transfer (RAFT) agent. As the molar ratio of the RAFT agent to AIBN increased, the zeta potential of the resulting copolymer emulsion increased, but the average size and size distribution of the emulsion droplets decreased. A living polymerization of HEA end-capped PU macromonomer and styrene was characterized by a linear increase in the molecular weight and decrease in the molecular weight distribution with consumption of monomers. The tensile strength, hardness and water-resistance of the copolymer films, prepared from the PU-PS copolymer emulsions, were much greater than those of the films prepared from the pure PU emulsion. The copolymer emulsions, prepared via the RAFT polymerization process, are expected to exhibit better storage stability than those prepared via the conventional free radical polymerization process, due to the presence of carboxyl groups derived from the RAFT agent at the PS block termini.     

融熔硫磺成形方法综述

硫磺是生产硫酸的主要原料，我国从石油和天然气中回收硫及硫的成形技术正在日益发展。介绍了融熔硫磺的各种成形方法，建议国内今后应朝着水小粒法、空气小料法的成形技术发展。     

融合动态层次聚类和邻域区间重组的蚁群算法

针对蚁群算法搜索速度过慢以及解质量不足等问题,提出一种融合动态层次聚类和邻域区间重组的蚁群算法。在初始阶段,调整层次聚类阈值并按照类间距离最小合并的原则迭代至目标簇集,根据预合并系数进行簇间合并,通过蚁群系统得到小类路径并断开重组以加快算法整体收敛速度;接着使用蚁群系统对解空间进行优化,同时并行处理簇集与簇集邻域区间扩散重组,增加解的多样性,进一步固定迭代次数进行比较,若邻域区间重组解质量优于当前优化解则进行推荐处理,提高解的精度;当算法停滞时,引入调整因子降低各路径信息素之间差异以增强蚂蚁搜索能力,有助于算法跳出局部最优。实验结果表明,在面对大规模问题时,算法的精度在3%左右,该方法相比传统方法可以有效提高解的精度和收敛速度。     

由磷肥厂副产氟硅酸生产无水氟化氢

随着我国氟工业的高速发展，使得氟资源枯竭加快，磷矿中有丰富的氟资源，如何回收利用好氟资源，给企业创造较好的经济效益，是磷复肥企业共同关注的问题。介绍了国外用氟硅酸生产无水氟化氢的专利技术以及四川大学的科研成果，认为经过中试获得必要的设计参数，便可推广应用，市场前景看好。     

突尼斯深海Oudna油田大排量气举工艺设计

为了快速高效的开发海上油气田,研究人工举升方案显得尤为重要。本文描述了Oudna油藏的地质特征、油藏条件及其流体物性。通过对Oudna油田的认识,从气源角度分析了采用燃烧废气作为气举气源的可行性并提出了气举开发的工艺流程。     

A method for the design of flexible distillation sequence

A simple method has been developed to optimally design a distillation sequence with a fixed degree of flexibility in feed composition and flowrate, and accounts for uncertainty in stage efficiency, K-value and beat transfer coefficient calculations. The method minimizes a weighted cost function and ensures both optimal and feasible operation in the range of flexibility/uncertainty by using an approach termed “practical feasibility”. The method was tested on a 4 column distillation sequence separating a 5 component light alkane feed mixture. Results are presented to illustrate the effect of uncertainty on sequence cost and column overdesign.     

SBR/LDPE复合改性沥青高温性能研究

研究了SBR／LDPE熔融共混物改性沥青的高温贮存稳定性及其粘温特性和动态力学性能，并利用光学显微镜观察了各种改性沥青在高温下随时间的变化。结果表明：采用预先制备的SBR／LDPE共混物所得到的改性沥青能够在高温下稳定贮存。同时，相形态观察也表明。这种共混物改性沥青的高温相形态也不随时间变化。而聚合物的加入在一定程度上降低了沥青的温度敏感性，提高了沥青的高温使用等级。