浅谈乳化炸药的生产工艺及控制

通过对乳化炸药生产线的深入研究并结合实际,详细分析生产乳化炸药的工艺及控制措施;先介绍乳化炸药生产的工艺流程,生产乳化炸药的原料及乳化炸药的组成,然后分析各工艺的原理及控制要求;诸如原料配置工艺及控制,乳化工艺及控制,冷却工艺及控制,敏化工艺及控制;为乳化炸药的安全生产和控制提供了较为实用的技术参考。     

30万t/a合成氨UPS系统设计及计算分析

2016年山东华鲁恒升化工集团有限公司新建30万t/a合成氨装置,主要包括氨合成系统、氨气压缩机及配套实施,合成气压缩机及配套设施、CO_2压缩机及配套设施、控制室及配套设施。装置的控制系统均由一套UPS电源系统进行供电。在进行UPS系统设计及计算时,正确选择UPS的系统结构及UPS后备电池容量,不仅关系装置控制系统的安全性、可靠性及稳定性,同时对降低投资及减少能耗也有很大帮助。     

如何加强我省高速公路生态环境保护及景观建设

随着高速公路的大规模建设,对其建设过程中的生态及景观建设越来越重视,根据笔者近几年环评工作的体会,简述江西公路生态及景观建设概况,论述加强高速公路生态保护及沿线景观建设的必要性,阐述高速公路生态及景观建设的要点及方法。     

锆及锆合金管道工程施工技术探讨

通过对锆及锆合金国内外标准及材料特性的研究,结合锆及锆合金工程实践,讨论原材料订货及检验、冷加工煨制作业可能出现的裂纹及检验要求。重点探讨了锆及锆合金工程焊接工艺评定开发,并以材质R60702为例,提出了焊接工艺参数。同时结合焊接实践,针对焊接缺陷产生的原因及种类,从焊工资格考核、焊前准备、焊接过程实施、提出对应解决方案,并对现行国家标准部分空白领域及条款,提出修订意见,为同类型锆及锆合金管道工程建设,提供了参考。     

贯叶金丝桃(贯叶连翘)研究进展

介绍了贯叶金丝桃的植物形态及分布,化学成分及分布规律,采集、干燥、加工、贮存及质量标准,药理及临床应用,国外管理现状等五方面的情况。     

国内外乙丙橡胶技术新进展

介绍了近年来国内外乙丙橡胶在新型催化剂开发、新工艺技术创新及优化、新产品开发、原料新来源及装备优化方面的研究及工业化应用最新进展,分析总结了新型催化剂、新工艺技术的特点、优势及应用情况,对新产品的制备方法、特性、功能及应用领域,新原料以及新装备的开发及优化进行了阐述,对乙丙橡胶技术开发及应用的发展方向提出了建议。     

污染场地土壤与地下水筛选值及标准应用

污染场地风险评估重要的一环是对后续场地修复制定土壤及地下水的修复值,其重要参考就是土壤及地下水污染物筛选值的应用。随着土壤环保产业的逐步推进,我国在土壤及地下水的标准也逐步更新及发展。针对污染场地调查及风险评估,本文梳理了国家及地方发布的土壤筛选值11项标准,以及4项地下水标准,并进行了针对其应用策略及适应范围的分析。     

贯叶金丝桃（贯叶连翘）研究进展

介绍了贯叶金丝桃的植物形态及分化,化学成分及分布规律,采集,干燥,加工,贮存及质量标准,药理及临床应用,国外管理现状等五方面的情况。     

电镀工程设计

电镀工程是一种系统工程。包括工艺及设备、建筑及结构、腐蚀与防护、给水排水及废水处理、废渣处理、排风送风及过滤、采暖供热及气体动力、强电弱电照明信号及自控、总图仓库及运输等专业科研成果择优综合工程化。其中任一专业出现问题,都会牵连到其它专业,直接或间接影响到电镀产品质量和产量,影响经济效益,并涉及到环境效益和社会效益。     

道康宁、威凯合作共同在亚洲生产有机硅原材料

20 0 3年 5月 2 8日美国道康宁公司与德国威凯化学品有限公司同时宣布 ,两家公司计划在亚洲地区成立合营公司 ,生产有机硅原材料及白炭黑 ,广泛用于建筑 ,润滑剂、电子及个人护理等工业及消费制品。两家公司将合作共同开发生产世界级基本材料 ,结合两者的独特专长及科技 ,该计划必定成为亚洲地区领先的有机硅中间体材料及白炭黑综合设施生产项目。道康宁及威凯均认为 ,综合生产设施带来的成本和质量的优势 ,将有利本地客户 ,以至对当地市场及社区的发展 ,都有帮助。两家公司将在同一地点内 ,各自发展及营运制品的生产 ,并在亚洲及区外地区 ,…     

Production of aceclofenac-loaded sustained release micro/nanoparticles using pressure homogenization and spray drying

The aim of the present study was to characterize polymeric micro/nanoparticles of aceclofenac produced using a high-pressure homogenizer and a spray dryer. The micro/nanoparticles were characterized in terms of their encapsulation efficiency (E.E.), particle size, morphology, and in vitro drug release performance. Interaction between the drug and the polymer (Eudragit RS 100 and ethylcellulose) was evaluated using Fourier transform infrared (FTIR) spectroscopy and X-ray powder diffractometry. Analysis of the results showed that speed and operating pressure have significant negative effect on E.E. of the micro/nanoparticles. The nanoparticles (970–197?nm) had E.E. of 74.09?±?1.17 to 83.66?±?1.63% while microparticles displayed EE. of 72.15?±?2.5%. The micro/nanoparticles were observed to be discrete and spherical. The FTIR analysis confirmed compatibility of aceclofenac with Eudragit RS 100 as well as ethylcellulose. In vitro study showed sustained drug release of 65 and 90% over a period of 12?h, thus prolonging the drug activity to treat the musculoskeletal disorder.     

Synthesis of ultralong hydroxyapatite micro/nanoribbons and their application as reinforcement in collagen scaffolds for bone regeneration

Ultralong hydroxyapatite (HAp) micro/nanoribbons were successfully synthesized by a simple hydrothermal method without using any organic solvents and templates. The ultralong HAp micro/nanoribbons were up to several hundred micrometers in length and 100–400?nm in width. The growth process and mechanism of this micro/nanoribbons were also analyzed in this study. Moreover, the ultralong HAp micro/nanoribbons were used as reinforcement in collagen scaffolds and the HAp/collagen composite scaffolds were fabricated by freeze-drying process without cross-linking. The morphological results demonstrated homogeneous interconnected porous structure in 20?wt% and 35?wt% HAp reinforced scaffolds. The compressive modulus of the 35?wt% HAp/collagen composite was about 6 times that of the pure collagen scaffold. The ultralong HAp reinforced collagen scaffold possesses a porous structure, good flexibility as well as elasticity, and thus it is promising for used as bone repair material.     

Microstructure evolution of 316L stainless steel micro components prepared by micro powder injection molding

Fabrication of micro components comprising of functional units of different dimensional order, ?100 μm, ?80 μm and ?60 μm, by micro powder injection molding is described in the paper. The microstructure is characterized for various microsize structures and substructures under different sintering conditions. The micro components are successfully molded, debound and sintered based on an in-house feedstock. Although sintered as an integral component, the microsize structure is at final stage sintering whereas the substructure is at intermediate stage sintering within the temperatures studied. The smallest microsize structures, ?60 μm, have the highest relative density. Higher surface area/volume ratio of the microsize structures is attributed to the advanced sintering. XPS results show that oxides on the debound micro components and consequent reduction products during hydrogen sintering attribute to the formation and progression of the observed dense layers.     

新型微发泡气体注射器注气过程可视化研究

气体注射器是微发泡注塑过程中一个重要装置,本文研究了新型气体注射器的注气过程,通过高速摄像和计算机数据采集系统采集的压力曲线分析注气过程,发现气体从气体注射器进入可视化装置时呈分散状态,有利于在微发泡过程中气体与熔体的分散混合。通过压力数据计算注气流量并配合高速摄像图像分析发现,注气压差和初始水压对注气流量影响很大。通过研究注气过程和注气量,发现新型微发泡气体注射器注气过程稳定可控,可用于微发泡注塑实验。     

铁碳微电解深度处理阿维菌素废水工程应用

采用铁碳微电解工艺深度处理阿维菌素废水好氧出水。结果表明,当好氧系统二沉出水COD为1 000mg/L时,在停留时间为1 h,进水pH为2.5,混凝pH为6,溶解氧为0.9~1.4 mg/L的最佳工艺条件下,COD去除率达到56%。铁碳微电解法适用于处理阿维菌素废水好氧出水,该方法COD去除率高,运行稳定,操作简单。     

模内微装配成型运动副界面损伤变形模拟分析

微装配界面损伤变形是模内微装配成型先进技术工业化应用的主要瓶颈之一。针对此问题，研究建立了模内微装配界面的损伤变形仿真技术，研究表明，在配合界面迎流面棱边附近的近表面，易诱发凹陷垮塌和黏性拖曳飞边二种损伤变形，损伤变形与二次成型注射速度呈先降后增的抛物线型演化规律，且与热流固耦合垮塌驱动压力、黏弹性支撑垮塌驱动正应力和黏性拖曳飞边驱动剪切应力呈现正关联关系，而与连续相变演化区域的厚度呈现负关联关系，减小热流固耦合冲击载荷和连续相变演化区域的厚度，有利于抑制运动副配合界面的损伤变形。     

显微⁃傅里叶变换红外光谱鉴别分析微塑料

利用显微?傅里叶变换红外光谱技术分析鉴别了不同粒径及不同种类的微塑料（粒径小于5 mm的塑料、纤维或橡胶碎片）,系统阐述了反射、透射、衰减全反射3种测量模式及其微区成像技术在微塑料鉴别分析中的优缺点。基于显微?傅里叶变换红外光谱衰减全反射技术,分析了北京景观水样中的微塑料,结果表明该方法简单、准确、可靠。     

Sequencing coagulation–photodegradation treatment of Malachite Green dye and textile wastewater through ZnO micro/nanoflowers

Sequencing coagulation–photodegradation over ZnO micro/nanoflowers was assessed for Malachite Green (MG) dye removal and followed by the MG-containing textile wastewater treatment. The ZnO micro/nanoflowers were prepared using a facile reflux route and analyzed by various characterization techniques. The flower-like morphological structures of ZnO were witnessed through microscopy analyses. X-ray diffraction findings showed that the prepared ZnO samples were highly crystalline with hexagonal wurtzite structure. The operational parameters including type of coagulant, coagulant dosage, solution pH, photocatalyst dosage and light power exerted their individual influences on the removal of MG dye. The CaCO₃ was the best coagulant among the three coagulants tested due to its high formation of precipitates and adsorption of cationic dye molecules. Using CaCO₃ as a coagulant, 88.3% MG removal was obtained at coagulant dosage of 160?mg and solution pH of 9.0. Complete removal of MG was found with 0.5?g?L^?1 ZnO micro/nanoflowers and 105?W light power. The kinetic analysis showed that a Langmuir?Hinshelwood model was in good agreement with dye removal data. Moreover, a complete removal of MG dye and 80.0% of chemical oxygen demand removal over sequencing coagulation–photodegradation were observed for MG-containing textile wastewater treatment. The sequencing coagulation–photodegradation process using ZnO micro/nanoflowers indicated much promise to be an attractive method for textile effluent treatment applications.     

保定师专学生微量元素含量测定与分析

用火焰原子吸收光谱法对保定师专部分学生发样中微量元素Fe、Zn、Ca、Pb含量进行了测定．对师专学生微量元素含量情况进行了分析，并对其饮食习惯提出建议。     

溶胶-凝胶法制备PTFE/SiO2疏水涂层

以聚四氟乙烯乳液(PTFE)和纳米硅溶胶为主要原料通过溶胶-凝胶法在玻璃表面上制备了疏水涂层。水滴在表面的接触角达到126°。通过显微电镜观察涂层表面结构,发现涂层表面分布许多微米大小的乳突。聚四氟乙烯低的表面能和复合表面的微米乳突结构是涂层能形成良好疏水性能的原因。考察了聚乙烯醇对复合涂层疏水性的影响。