单火嘴单区烧氨技术在硫磺回收装置的应用

介绍了单火嘴单区烧氨技术在中国石油辽阳石化分公司炼油厂硫磺回收装置的应用情况.重点介绍了烧氨技术的原理,对单火嘴单区和双区这2种烧氨技术进行对比.实践证明：处理含烃高的酸性气的硫磺回收装置宜采用单火嘴单区烧氨技术.该硫磺回收装置硫磺转化率达99.88％,排放尾气ρ（SO2）为307 mg/m^3,系统阻力降保持在10 kPa左右.     

陕西延长石油榆林炼厂干气脱硫及硫磺回收装置投运

陕西延长石油集团榆林炼厂干气脱硫及硫磺回收装置日前成功投运,该装置包括10×104t/a干气脱硫系统、3300t/a硫磺回收及压滤系统、8000m3/h尾气焚烧系统,可对炼厂干气、酸性气中有毒有害物质进行焚烧、分解,同时回收硫磺,提高干     

克劳斯工艺尾气硫磺、硫化氢超标的处理

针对克劳斯硫回收工艺处理硫化氢酸性气尾气中硫磺、硫化氢超标,造成尾气管道堵塞、阀门卡涩,腐蚀及氨法脱硫装置系统紊乱等一系列问题,进行针对性改造,基本解决上述问题。     

小型炼油厂酸性气回收技术的比较及选择

介绍了国内外炼油厂酸性气处理技术的现状,综述了酸性气回收制硫磺、亚硫酸胺、硫氢化钠、硫脲的工艺技术,对比分析了小型炼油厂几种酸性气处理工艺的技术来源、适用规模、技术成熟度、脱硫效率、产品前景及运行成本等方面,并为小型炼油厂的酸性气处理提供了具体建议:对于小型炼油厂建酸性气处理装置,可选择LO-CAT回收制硫磺技术或回收制硫氢化钠工艺;对于建设1kt/a左右的小规模硫回收装置,更适合采用回收制硫氢化钠工艺。     

九江石化及时抢修硫磺回收装置

2010年9月28日,九江石化三套硫磺回收装置尾气炉点火,加氢反应器升温,酸性气引入尾气处理系统,三套硫磺回收装置顺利恢复正常生产。     

和田河OR-GREEN硫磺回收装置运行分析

采用OR-GREEN硫磺回收技术处理和田河天然气处理站MDEA装置富集的酸性尾气,在常压、低温的条件下将酸性气中的H2S直接转化为单质硫磺,反应后外排尾气中H2S含量小于10 mg/kg。介绍了OR-GREEN硫磺回收装置的基本结构,对系统热量平衡进行分析,并对投产运行情况作了简单总结。     

普光气田天然气净化厂联合装置运行简介

普光气田天然气净化厂是中国石化集团公司＂川气东送工程＂的关键组成部分,位于川东北达州地区宣汉县普光镇赵家坝,占地3402亩,总投资130.28亿元。从2005年开始选址、设计、施工,至2009年10月第一联合装置投料试车成功,历时近五年时间。工程设计建设6套联合装置（12个系列,单列处理能力300万方/天,总处理能力120亿方/年）、配套公用工程、硫磺储运装置及硫磺外运专用铁道。[1]工厂引进了国外先进成熟的天然气净化工艺包。工艺装置主要包括脱硫、脱水、硫磺回收、尾气处理、硫磺成型和酸性水汽提装置,采用MDEA法脱硫、三甘醇法脱水、常规克劳斯二级转化法回收硫磺、加氢还原吸收尾气处理和酸水汽提的工艺技术路线;以普光气田高含硫天然气为原料（硫化氢14.5%,二氧化碳8.8%）,年处理能力120亿方（日处理能力3600万方）,净化气能力90亿方,硫磺能力220万吨,是国内建设的第一个百亿方级高含硫天然气净化厂,综合处理能力和硫磺产量位居世界前列。     

福建联合石化建设酸性气处理硫磺回收项目

正南京工程公司承建的福建联合石化有限公司酸性气处理硫磺回收项目总投资2.83亿元,由原2×10万吨/年硫磺回收装置改造、新建12万吨/年硫磺回收装置和装置外系统配套管线等三部分组成。老装置改造采用尾气净化工艺,目前已经开始设备安装。新建硫磺装置采用超级克劳斯+尾气净化工     

络合铁法降低硫磺回收装置二氧化硫排放的可行性研究

络合铁液相氧化脱硫技术是一种硫磺回收新工艺,具有硫回收率高、排放尾气中硫元素含量低的优点。通过分析该脱硫技术的特点以及硫磺回收装置加氢还原吸收净化尾气的组成,对该脱硫技术降低硫磺回收装置SO_2排放的可行性进行了探索与研究,认为完全能够适应尾气达标排放要求。     

中国化工集团山东昌邑石化有限公司50kt·a^-1硫磺回收装置顺利投产

2011年12月8日,中国化工集团山东昌邑石化有限公司50kt·a^-1硫磺回收装置一次开车成功,顺利生产出合格的硫磺产品。该装置采用ROA还原氧化吸收新工艺,包括酸性气部分燃烧技术、二级克劳斯硫回收技术、SO2选择性还原技术、H2S选择性氧化技术和尾气催化氧化吸收技术等,同时采用酸性气燃烧先进控制技术、尾气深冷技术以及组合催化剂技术等四项专利,属国内首创,弥补了传统克劳斯硫磺回收工艺的不足。     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.     

Kinetics and Mechanism of Oxidation of Mono- and Polyacetals

Abstract

Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed.     

医药和农药纳米剂型研究和应用

系统介绍了医药和农药纳米剂型研究进展和应用前景。医药微乳剂和纳米悬浮剂可显著改善药物的悬浮性和分散性,提高生物利用度。载药纳米微粒具有缓释功能,延长药物在体内的半衰期,并可实现药物的靶向定位给药。农药微乳剂具有增溶和渗透作用,提高农药的传递效率和使用安全性。农药纳米悬浮剂和载药纳米粒均可显著提高药效。纳米技术为医药和农药剂型的研究提供了新机遇,具有广阔的应用前景。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.     

甘油锌和光稳定剂NBC、BZ的光稳定作用测试与评价

对用甘油锌作光稳定剂的光稳定作用进行了测试，并与光稳定剂NBC，BZ进行了比较。研究了甘油锌，NBC和BZ与双酚A的复配效果。研究结果表明，甘油锌是一种性能优良的光稳定剂。     

塑料挤出机螺杆,机筒耐磨损,耐腐蚀的强化与应用

对塑料挤出机,注塑机螺杆,机筒的磨损,腐蚀原因及提高螺杆,机筒耐磨损,耐腐蚀的方法、制造与应用作了较详尽的介绍。     

Modelling and simulation of batch and semi-batch emulsion copolymerization of styrene and butyl acrylate

This work deals with modelling of emulsion polymerization processes using batch and semi-batch reactors. Specific attention is paid to copolymerization of the system styrene/butyl acrylate.The main key parameters of the model are identified on the basis of batch experimental data in order to describe the complete sketch of emulsion polymerization. The model is then used to simulate, under several operating conditions, the polymerization rate, the global monomers conversion, the number and weight average molecular weights as well as the particle size distribution and the glass transition temperature. Then, the model is generalized to the use of semi-batch processes and validated for this application.     

Structure Elucidation and Evaluation of Antioxidant and Tyrosinase Inhibitory Effect and Mechanism of Proanthocyanidins from Leaf and Fruit of Leucaena Leucocephala

This study aimed to investigate the structural features, antioxidant activity, tyrosinase inhibitory effect, and mechanism of proanthocyanidins from leaf and fruit of Leucaena leucocephala. MALDI-TOF-MS, thiolysis coupled with HPLC-ESI-MS, and ¹³C-NMR confirmed that these proanthocyanidins were complex mixtures of propelargonidins, procyanidins, and prodelphinidins. (Epi)catechin, (epi)gallocatechin, (epi)catechin gallate, and (epi)gallocatechin gallate were the main constitutive units. The findings obtained from enzyme analysis revealed that the proanthocyanidins had inhibitory effects on both monophenolase and diphenolase of tyrosinase. The IC₅₀ values of leaf and fruit proanthocyanidins were 73.5?±?2.7 and 52.3?±?3.5 µg/mL for monophenolase activity, and 27.2?±?1.4 and 16.1?±?1.1 µg/mL for diphenolase activity, respectively. The inhibition of diphenolase by proanthocyanidins were proved to be reversible and mixed type. In addition, it was also found from various antioxidant methods that the proanthocyanidins in leaf and fruit possessed potent DPPH radical scavenging activity with IC₅₀ values of 103.4?±?0.8 and 87.8?±?1.1 µg/mL, ABTS radical scavenging activity with IC₅₀ values of 72.9?±?0.4 and 65.7?±?0.9 µg/mL, and ferric reducing antioxidant power with FRAP values of 3.74?±?0.03 and 4.02?±?0.15?mmol AAE/g, respectively. The results obtained suggested that the proanthocyanidins from leaf and fruit of L. leucocephala might have the potential to be exploited as natural tyrosinase inhibitors and antioxidants.