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基团贡献

基团贡献的相关文献在1992年到2021年内共计71篇,主要集中在化学工业、化学、自动化技术、计算机技术 等领域,其中期刊论文66篇、会议论文1篇、专利文献5430篇;相关期刊39种,包括天津科技大学学报、南京工业大学学报(自然科学版)、山东煤炭科技等; 相关会议1种,包括第五届全国化工年会等;基团贡献的相关文献由185位作者贡献,包括衣守志、马沛生、刘国杰等。

基团贡献—发文量

期刊论文>

论文:66 占比:1.20%

会议论文>

论文:1 占比:0.02%

专利文献>

论文:5430 占比:98.78%

总计:5497篇

基团贡献—发文趋势图

基团贡献

-研究学者

  • 衣守志
  • 马沛生
  • 刘国杰
  • 李平
  • 刘洪来
  • 刘红研
  • 郭瓦力
  • M·D·罗
  • 何茂刚
  • 刘向阳

基团贡献

-相关会议

  • 期刊论文
  • 会议论文
  • 专利文献

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    • 刘祖虎; 胡兴邦; 陈善勇; 李国祥; 郭学锋; 张志炳
    • 摘要: 美罗培南是一种广谱、高效、安全的抗生素,也是治疗新冠肺炎的临床药物之一.研究美罗培南加氢反应的一锅法和两步法工艺过程,利用基团贡献法估算反应体系中各组分的物性,包括临界参数、标准摩尔生成焓、标准摩尔熵、比热容等.利用热力学基本原理,计算美罗培南加氢反应的标准摩尔反应焓、标准摩尔反应熵、标准摩尔反应Gibbs自由能和平衡常数.结果表明,美罗培南加氢反应是放热反应,且放热量较大,降低操作温度有利于反应向热力学有利的方向进行;加氢反应是较容易进行的,缩合反应的平衡常数远小于加氢反应;可着重考虑采用降低操作温度,及时移出反应产物等方式推动缩合反应向正反应方向进行.热力学理论计算与实际情况吻合较好.一锅法在热力学上优于两步法,但需要解决催化剂易中毒问题.将抗中毒的包围型催化剂与微界面反应强化技术结合优化一锅法加氢过程是对美罗培南加氢反应技术升级一个值得探索的方向.
    • 周超; 赵文英; 陈超; 陈玉石; 项曙光
    • 摘要: 为了更准确地估算有机物正常沸点,采用10类(7229种)有机物正常沸点的实验数据对Lydersen-Forman-Thodos、Joback、Joback修正、Constantinou-Gani(C-G)及元素和化学键11种正常沸点估算方法进行评价。通过与实验值比较得到的平均相对误差和相对误差分布,评价11种估算方法预测结果的准确性。结果表明,总体上C-G法最准确,平均相对误差为3.74%;元素和化学键1法次之,平均相对误差为3.86%。C-G法适用于估算醇、醛、酸、醚、含硫和含氮类有机物,元素和化学键4、2、7方法分别对酯类、烃类、酮类、卤素类有机物的估算结果最准确。由于基团拆分原则的限制,C-G法适用范围小于元素和化学键法。
    • 王恺钊; 刘艳军
    • 摘要: 以van der Walls-Platteeuw模型为基础,采用划分基团贡献的思想利用UNIFAC法和Aasberg-Petersen模型分别计算十二烷基硫酸钠(SDS)中不同基团对水的活度系数贡献值,建立了SDS体系下甲烷水合物生成条件预测模型.经实验验证,预测最大误差不超过5%,平均误差在3%以内,改进后的模型良好的可靠性可为水合物动力学研究提供准确的相平衡数据.通过模型计算,发现相对比纯水,SDS会影响水的活度明显改善水合物生成条件.当浓度在0.0015 mol/L时效果最好,超过0.002 mol/L时,反而会提高水合物生成条件抑制水合物生成.
    • 郑文龙; 蒋丽红; 王亚明; 刘磊
    • 摘要: 临界温度是物质重要的物性数据之一,由于其测定工作难度较大,尤其不稳定物质的临界温度更难以精确测定,估算法成为研究物质临界温度的重要方法.综述了有机物临界温度的估算方法,主要介绍了Riedel法、Lydersen法、Ambrose法、Fedors法、Joback法、MXXC法、C-G法等十一种基团贡献方法的原理、优缺点及应用范围,并对这些方法进行比较和评述.利用这些方法对松节油组分及其衍生物中的α-蒎烯、Δ3-蒈烯、(+)-柠檬烯、伞花烃的临界温度进行估算比较,结果表明Joback、MXXC、Marrero-Pardillo、张克武-张宇英等方法用于该体系时相对误差在2.5%以下,而Lydersen、Ambrose和Wilson-Jasperson等方法的相对误差较大.最后对有机物临界温度基团贡献法的发展趋势进行了展望.%The critical temperature is one of the important physical properties of substances.Because it is difficult to be accurately measured,especially for the unstable substance,so that estimation method becomes an important method to study the critical temperature of the material.In this paper,a variety of methods for estimating the critical temperatures of organic compounds were reviewed,mainly intro-ducing the principles,advantages,disadvantages and application ranges of Riedel method,Lydersen method,Ambrose method,Fedors method,Joback method,MXXC method,C-G method and so on eleven methods,and these group contribution methods were compared.Moreover,these methods were used to estimate and compare critical temperatures of α-pinene,Δ3-Carene,(+ )-limonene and p -cymene in turpentine components and their derivatives.The results showed that the relative errors are less than 2.5% when Joback method,MXXC method,Marrero-Pardillo method,ZHANG Kewu-ZHANG Yuying method are applied to the system.However,the relative errors of Lydersen method, Ambrose method and Wilson-Jasperson method are bigger.Finally,the development trend of Group-contribution Methods for estimating critical temperatures of organic compounds was prospected.
    • 刘济宁; 吕凤兰; 石利利; 陈国松; 沈树宝
    • 摘要: The quantitative structure-biodegradability relationship ( QSBR) studies were performed with the ready biodegradability of aromatic compounds by the linear group contribution method, artificial neural network and support vector machine approach based on principal component analysis. The contributions of various groups to ready biodegradation were obtained. The prediction accuracy of the linear group contribution method was 80. 3% for the training set,79. 2% for the test set, and 80. 1% for all compounds. With the support vector machine approach, it was 84. 8% ,85.4% and 84.9% , respectively; with the neural network approach, it was 97.7% ,81.2% and 95.2% Respectively. Results showed that three methods had well prediction results for the training set and the test set.%分别采用线性基团贡献、支持向量机与人工神经网络法对芳香族化合物的快速生物降解性进行定量结构-生物降解关系(QSBR)研究,得到不同基团对芳香族化合物快速生物降解性的贡献值.线性基团贡献法对于训练组和测试组的预测正确率是80.3%和79.2%,总的预测正确率达80.1%;支持向量机的预测正确率分别是84.8%、85.4%和84.9%,而人工神经网络法的预测正确率分别是97.7%、81.2%和95.2%.结果表明,这3种方法的预测效果均较好.
    • 孙贤祥; 陈玉婷; 夏天喜
    • 摘要: 实验测定了S-噻吗洛尔-D-酒石酸非对映体盐(S-TTS)在乙醇、正丙醇、丙酮、l,2-二氯乙烷和乙酸乙酯中的溶解度.在相同温度下,S-TTS在这些溶剂中的溶解度(s)顺序是:S(乙(-))>S(正丙醇)>S(丙酮)>S(1.2(-*.Ⅷ)>S(乙酸乙(m)).用四参数多项式、Apelblat方程、改进的Apelblat方程和λH方程关联了溶解度实验数据,以四参数多项式关联实验数据的结果最好,其相关系数(R2)>0.99,平均绝对相对偏差(AARD)(%)<4.提出了l,2,5-硫氮二茂基团、含手性碳次甲基基团(°CH)等新的基团相互作用参数,并用UNIFAC法预测了S-TTS在这5种溶剂中的溶解度,所得结果的平均绝对相对偏差(%)<53,并与用λH方程等的结果作了比较.%The determinations of the solubility of S-Timolol-D-Tartrate diasteromeric salt (S-TTS) in five solvents, ethanol, n-propanol, acetone, 1,2-dichloroethane and ethyl acetate, at five temperatures were performed respectively. The results indicate that, according to the dissolved magnitude, the obtained solubilityOrder Of S-TTS in above five Solvents is S(ethanol> >S(n-propanol) >S(acetone) >S(l,2-dichloroethane>S(ethyl acetate)- Theobtained experimental data were respectively fitted with four empirical equations, such as polynomial equation, Apelblat equation, modified Apelblat equation and AH equation, and good correlation coefficients (R2>0.99) with the smallest average absolute relative derivation (AARD), AARD <4%, were obtained by using the polynomial equation. In this paper, several new group interaction parameters were proposed, and based on them, the UNIFAC model can be used to predict the solubility of S-TTS in above five solvents. The results show that, using the UNIFAC model, the AARDs of the solubility predictions for S-TTS are <53%, and they are smaller than the AARDs of the perditions obtained by using the AH equation.
    • 王莎莎; 郭瓦力; 田旭; 冯健; 李萍; 刘思乐; 王修纲
    • 摘要: Joback group contribution method, Lydersen method, Riedel method, Ednister method, Rowlinson-Bondi corresponding state method and Benson method were used to estimate basic physical parameters and thermochemical property parameters related to the system of preparation of 3,4-dimethyl-lH-yl-pyrazoIe from 3-methyl-2-butanone ,such as boiling point, critical parameters .eccentricity factor and gas heat capacity, liquid heat capacity ,latent heat of the evaporation, standard molar entropy of gas, entropy of phase transition. The bond energy method was used to calculate the standard reaction heat of the gas,at the same time the reaction heat under the actual reaction conditions was calculated as well as Gibbs free energy and chemical equilibrium constant, and characteristics of the reaction system were analyzed. These estimated data can provide the reference for theory research, engineering design and amplification of the reaction system.%采用Joback基团贡献法、Lydersen法、Riedel法、Ednister法、Rowlinson-Bondi对应状态法、Benson 法估算了甲基异丙基酮制备二甲基吡唑反应体系相关物质的基本物性参数如常沸点、临界参数和偏心因子,基本热化学性质参数如气体热容、液体热容和蒸发潜热、气体标准摩尔熵、相变熵.利用键能法计算了气体的标准反应热,计算了实际反应条件下的反应热、吉布斯自由能及相关反应的化学平衡常数,并对反应体系的特点进行了分析,估算数据可为理论研究、工程设计与放大及生产提供参考.
    • 杨惠斌; 常小瑞; 江洪波; 翁惠新
    • 摘要: 采用基团贡献法和对比态法对菲加氢反应体系进行了热力学计算,得到不同温度下反应焓变、吉布斯自由能变和平衡常数.结果表明:该反应体系各反应均为放热反应,各反应在热力学上是可行的.选择合适的温度有利于控制菲加氢反应体系的加氢深度,从而降低氢耗和达到选择性加氢的目的.%Thermodynamics for phenanthrene hydrogenation system was estimated based on the method of group contributions and corresponding states and the enthalpy change, Gibbs free energy change and equilibrium constant at different temperatures were calculated. The results showed that all reactions were exothermic and feasible in thermodynamics. To control hydrogenation depth, reduce hydrogen consumption, and selectively hydrogenate, appropriate temperature of reaction system should be chosen.
    • 陆向红; 杨云财; 计建炳
    • 摘要: Solubility Parameters of fatty acid methyl esters (FAMEs) were calculated by group contribution methods.Results showed that solubility parameters of FAMEs increased with the chain length, but were not affected by the degree of unsaturation.KB values and extraction ability of FAMEs for pyridine in water were measured and compared with solubility parameters.It was shown that the consistency existed among KB value, extraction ability and solubility parameters.Hansen solubility parameters of FAMEs calculated by group contribution methods could reflect the solvency of FAMEs.Solubility parameter of FAMEs, organic solvents and organic impurities were compared.Results showed that FAMEs could instead of organic solvents and be used in industrial fields.FAMEs were a promising green solvent because of its safety, non -toxicity and bio -degradability.%采用基团贡献法计算了单个脂肪酸甲酯的溶解度参数,发现脂肪酸甲酯的溶解度参数随着碳链的增长而降低,而碳链不饱和度的增大对其影响有限.测定了几种脂肪酸甲酯的KB值,考察了生物柴油萃取废水中苯酚的萃取性能,并将其与脂肪酸甲酯的溶解度参数进行了比较,结果显示利用基团贡献法计算得到的脂肪酸甲酯的Hansen溶解度参数可以很好地反映脂肪酸甲酯的溶解性能.在此基础上,比较了脂肪酸甲酯与常用有机溶剂、常见有机污染物的溶解度参数,结果发现,脂肪酸甲酯与常用有机溶剂、常见有机污染物具有相近的溶解度参数,脂肪酸甲酯可以作为一种性能优良的绿色溶剂,替代常用的有机溶剂广泛应用与工业清洗、废弃物处理等方面.
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