国内外苯酚的供需现状及发展前景

目前,全球苯酚的总生产能力约为926万ta/,2004年总消费量为774.5万t,预计到2009年总消费量将达到约945.2万t。2005年我国苯酚的总生产能力约为54.0万ta/,产量为44.3万t,消费量约为73.3万t。预计到2007年和2010年我国苯酚的总生产能力将分别达到约85万ta/和110万ta/,消费量将分别达到约85.0万t和96.0万t。针对目前存在的问题,提出了我国苯酚今后的发展建议。     

苯乙烯的供需现状及发展前景

2005年,全球苯乙烯的总生产能力为2745.0万t/a,总消费量为2434.7万t.预计2010年总生产能力将达到约3786.0万t/a.总消费量将达到约3003.0万t.截止到2006年11月我国苯乙烯的总生产能力为285.5万t/a;2005年产量为125.0万t,消费量为405.0万t.预计2010年我国苯乙烯的总生产能力将达到约600.0万t/a,消费量将达到约580.0万t.针对存在的问题,提出了我国苯乙烯今后的发展建议.     

苯乙烯的供需现状及发展前景

2005年,全球苯乙烯的总生产能力为2745.0万t/a,总消费量为2434.7万t。预计2010年总生产能力将达到约3786.0万t/a,总消费量将达到约3003.0万t。截止到2006年11月我国苯乙烯的总生产能力为285.5万t/a;2005年产量为125.0万t,消费量为405.0万t。预计2010年我国苯乙烯的总生产能力将达到约600.0万t/a,消费量将达到约580.0万t。针对存在的问题,提出了我国苯乙烯今后的发展建议。     

国内外乙二醇的市场分析(一)

2006年全球乙二醇的总生产能力为1955.5万t/a,总消费量为1701.0万t。预计到2011年总消费量将达到约2171.8万t。目前我国乙二醇的总生产能力为207.8万t/a,2006年消费量为562.0万t,预计到2010年我国乙二醇的总生产能力将达到约420.0万t/a,消费量将达到约710.0万t。针对存在的问题,提出了我国乙二醇今后的发展建议。     

苯酚国内外市场分析

2004年世界苯酚/丙酮总生产能力约870万t/a,需求量为748万t,主要用于生产双酚A和酚醛树脂,二者占苯酚产量的比例分别为40%和28%.全球苯酚需求的年均增长率将达到4%～5%,2006年苯酚需求量可望达到800万t.2004年,我国苯酚生产能力达到74.0万t/a,产量约41.0万t,预计今后几年国内苯酚消费量将以每年9%的速度递增.     

苯酚国内外市场分析

2004年世界苯酚/丙酮总生产能力约870万t/a,需求量为748万t,主要用于生产双酚A和酚醛树脂,二者占苯酚产量的比例分别为40%和28%.全球苯酚需求的年均增长率将达到4%～5%,2006年苯酚需求量可望达到800万t.2004年,我国苯酚生产能力达到74.0万t/a,产量约41.0万t,预计今后几年国内苯酚消费量将以每年9%的速度递增.     

国内外苯酚生产及市场分析

1999年世界苯酚生产能力667.9万t/a,开工率89%,苯酚的消费量为611.6万t.2000年随着一些新装置的投产,世界苯酚生产能力达到789.4万t/a,预计20 03年全球苯酚生产能力将达897万t/a,届时需求量为717万t.2000年我国苯酚实际生产能力达到34.85万t/a,产量约23.6万～24.6万t,进口量9.69万t,表观消费量约33万～34万 t.预测我国对苯酚的需求量将持续增长,2005年我国苯酚需求量可望达到37万～40万t.     

国内外乙二醇现状及发展前景

2005年,全球乙二醇的总生产能力为1 779.2万t,总消费量为1 605.5万t.预计到2010年总生产能力将达到约2 821.0万t,总消费量将达到约2 130.0万t.目前我国乙二醇的总生产能力为169.8万t,2005年产量为110.1万t,消费量为508.8万t,预计到2010年我国乙二醇的总生产能力将达到约400.0万t,消费量将达到约710.0万t.针对存在的问题,提出了我国乙二醇今后的发展建议.     

甲基异丁基酮市场分析

分析了国内外甲基异丁基酮的生产消费现状及发展前景.2009年,全世界甲基异丁基酮的生产能力约为55.5万t/a,消费量约为32.0万t.目前我国甲基异丁基酮的总生产能力约为10.5万t/a,2009年消费量约为6.6万t.预计2011年和2015年对甲基异丁基酮的需求量将分别达到约8.0万t和11.0万t,产能基本上可...     

国内外乙二醇现状及发展前景

2005年,全球乙二醇的总生产能力为1779.2万t,总消费量为1605.5万t。预计到2010年总生产能力将达到约2821.0万t,总消费量将达到约2130.0万t。目前我国乙二醇的总生产能力为169.8万t,2005年产量为110.1万t,消费量为508.8万t,预计到2010年我国乙二醇的总生产能力将达到约400.0万t,消费量将达到约710.0万t。针对存在的问题,提出了我国乙二醇今后的发展建议。     

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。     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

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。     

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.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

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.     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method¹ was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity.     

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.     

二甲基二烯丙基氯化铵和丙烯酰胺的合成及应用

用复合引发体系(过硫酸盐-偶氮类引发剂)和脂肪胺类氧化还原体系引发,在实验室获得了单体转化率≥98%,特性粘数高于13.6 dL/g的阳离子共聚物PDA,探讨了控制聚合物分子量的影响因素.