BUBBLE TEMPERATURES OF THE BINARY MIXTURES OF 1,2-DIMETHYLBENZENE WITH 2-PROPANOL, 1-BUTANOL, 2-BUTANOL, 2-METHYLPROPAN-1-OL AND 2-METHYLPROPAN-2-OL AT 95 kPa

Bubble temperatures at 95?kPa over the entire composition range are measured for the five binary systems formed by 1,2-dimethylbenzene with 2-propanol, 1-butanol, 2-butanol, 2- methylpropan-1-ol, and 2-methylpropan- 2-ol. A Swietoslawski - type ebulliometer was used for the measurements. The composition versus temperature measurements are well represented by the Wilson model.     

2-甲基-3-丁烯-2-醇+直链一元醇二元体系的过量摩尔体积和表观摩尔体积298.15 K)

Excess molar volumes (Vm^E) of binary mixtures of 2-methyl-3-buten-2-ol[CH3C(OH)(CH3)CHCH2] with four 1-alcohols:methanol,ethanol,1-propanol and 1-butanol at 298.15K and atmospheric pressure are derived from density measurements with a vibrating-tube densimeter.All the excess volumes are negative in the systems over the entire composition range. The results are correlated with the Redlich-Kister equation.The effects of chain length of 1-alcohols on Vm^E are discussed.The apparent molar volumes of 2-methyl-3-buten-2-ol and 1-alcohols are calculated respectively.     

环己烷、正丁醇、甲苯有关二元体系加压相平衡

以环已烷、正丁醇、甲苯为代表,进一步研究了烷烃、芳烃和低级醇在加压下的相平衡规律。测定了有关3个二元体系在101.3、304.0、506.6、709.3、911.9kPa下汽液平衡数据,对实测数据进行了统一关联,计算结果与实测值符合良好。环己烷-正丁醇、正丁醇-甲苯体系在所测压力下均形成最低共沸点。     

4－环己基－3－丁烯－1－醇的合成与香气研究

合成了４－环己基－３－丁烯－１－醇化合物，该化合物是一种有实用价值的新香料。     

4－环己基－3－丁烯－1－醇的合成与香气研究

合成了４－环己基－３－丁烯－１－醇化合物，该化合物是一种有实用价值的新香料。     

3－己炔－1－醇合成方法的研究

从乙炔出发经两步合成了３－己炔－１－醇。考察了不同烷基化试剂、反应温度、反应时间、试剂用量等因素对收率的影响，从而确定了合适的反应条件并降低了生产成本。     

3－己炔－1－醇合成方法的研究

从乙炔出发经两步合成了３－己炔－１－醇。考察了不同烷基化试剂、反应温度、反应时间、试剂用量等因素对收率的影响，从而确定了合适的反应条件并降低了生产成本。     

2-甲基-3-丁烯-2-醇合成3-甲基-2-丁烯-1-醇

[目的]2-甲基-3-丁烯-2-醇是异戊二烯间接皂化法生产3-甲基-2-丁烯-1-醇过程中产生的副产物,废物回收再利用是节能减排的有效措施.[方法]2-甲基-3-丁烯-2-醇经氯化、酯化和皂化得到3-甲基-2-丁烯-1-醇.[结果]结果表明:在优化条件下,氯化反应的产率可达87.25％,酯化和皂化反应的产率可达84.53％.[结论]该方法是2-甲基-3-丁烯-2-醇再利用的有效方法.     

R-2-氨基-3-甲基-1,1-二苯基-1-丁醇的合成

R-2-氨基-3-甲基-1,1-二苯基-1-丁醇是一种合成手性催化剂的重要中间体。从原料R-缬氨酸经甲酯化,苄氧羰基保护制得R-2-苄羰基氨基-3-甲基-丁酸甲酯,然后与苯基溴化镁反应制得（R）-2-苄氧羰基氨基-3-甲基-1,1-二苯基-1-丁醇。接着在5%Pd/C催化加氢下脱除苄氧羰基得到目标化合物,总收率58%。此制备方法涉及的中间体及目标化合物易于纯化,总收率高且重现性好。     

(Z)-9-tetradecen-1-OL formate

Concentrations in air of (Z)-9-tetradecen-1-ol formate (Z-9-tdf), a mating disruptant ofHeliothis moths, were measured intermittently over a 22-day period in a corn field. The chemical was emitted from laminated plastic (Hercon^®) dispensers arranged in a square grid with 10-m spacing. Measurements were made at three heights near the center of the treated plot and 1 m downwind from disruptant dispensers. Concurrent measurements were made of wind speed, air temperature, and temperature gradient.Z-9-tdf concentrations ranged from below detectable levels to 195 ng/m³ and were generally highest in the horizontal plane of the dispenser. As wind speed decreased near sunset, concentrations increased sharply, then decreased again near midnight. SinceHeliothis moths mate in the evening and early night, the concentration pattern was favorable for mating disruption. Strong temperature inversions within the crop canopy, which occurred daily before sunset, did not apparently affectZ-9-tdf concentrations. Concentrations decreased steadily on successive sampling days after application, and, by day 27, ranged from 0 to 30% of those on day 6. The data suggest that the corn plants and the soil may act as sinks for the chemical vapor at night.     

BOILING POINT TEMPERATURES OF THE BINARY MIXTURES OF 1,3-DIMETHYLBENZENE WITH METHANOL, 1-PROPANOL, OR 2-PROPANOLAT 95 kPA

Boiling point temperatures at 95 kPa over the entire composition range are measured for the three binary systems formed by 1,3-dimethylbenzene with methanol, 1-propanol, and 2-propanol. A Swietoslawski-type ebulliometer was used for the measurements. The composition versus temperature measurements are well represented by the Wilson model.     

生物酶法合成(S)-2-氨基-1-丁醇的研究

以粪产碱杆菌来源的青霉素G酰化酶为催化剂,酶法拆分苯乙酰消旋底物转化生成(S)-2-氨基-1-丁醇。通过对催化过程中加酶量、底物浓度、反应温度、pH进行优化,确定最适酶催化条件是pH 9.0,40℃,底物浓度100 mmol/L,酶量2 U/mL,反应体积80 mL。在最适反应条件下,当消旋底物转化率达40%时终止反应可获得较高的产物光学纯度(ee>99%)。     

Alcohol oxidations in aqueous solutions using Au,Pd, and bimetallic AuPd nanoparticle catalysts

Alcohol oxidations under mild conditions using polyvinylpyrrolidone (PVP)-stabilized Au, Pd and bimetallic AuPd nanoparticle catalysts in aqueous solutions have been investigated. The catalytic activities of the nanoparticles towards the oxidation of benzyl alcohol, 1-butanol, 2-butanol, 2-buten-1-ol and 1,4-butanediol indicate that bimetallic 1:3 Au:Pd nanoparticles have higher catalytic activities than Au, Pd and other bimetallic AuPd nanoparticles, and that selectivities towards specific products can often be tuned using bimetallic particles. In addition, advantages and disadvantages for the use of such nanoparticle catalysts as mild, environmentally-friendly oxidation catalysts are examined.     

2-甲基-3-(2-呋喃基)-2-丙烯-1-醇的合成研究

本文报道了利用交叉Cannizzaro反应,合成2-甲基-3-(2-呋喃基)-2-丙烯-1-醇的一种新方法。该合成法,步骤简单;原料易得,价廉;在最佳反应条件下,产率可达58．1％。较已有文献报道的产率44％有较大幅度的提高。     

Synthesis of homoallyl alcohol from 1,4-butanediol over ZrO2 catalyst

Catalytic dehydration of 1,4-butanediol was investigated over ZrO₂ with monoclinic crystal phase at temperatures of 275–425 °C. In the reaction, 3-buten-1-ol was effectively produced together with tetrahydrofuran (THF) over ZrO₂ at 300–375 °C. 3-Buten-1-ol and THF were produced competitively, and the yield of 3-buten-1-ol increased with increasing the contact time. Formation of by-products such as 2-buten-1-ol, 2-butenal, and 1-butanol was suppressed over ZrO₂ at 325 °C.     

反-反-2,4-己二烯醇高效液相色谱分析方法研究

本文建立了一种用高效液相色谱测定反式-反式-2,4-己二烯醇的定量分析方法。它采用Inertsil ODS-SP C18色谱柱,以甲醇-磷酸水溶液(体积比为60∶40)为流动相,流量为1.0 mL/min,柱温为30°C,选择230 nm为检测波长进行检测。结果显示该方法的线性相关系数0.9990,标准偏差为0.092,平均回收率为100.2%。此方法简便、快速、能进行准确定量分析,结果稳定。     

3-甲基-2-丁烯-1-醇的制备新工艺

研究了以溴代异戊烯水解工艺和精馏分离工艺为基础来制备3-甲基-2-丁烯-1-醇的新工艺。通过优化溶剂种类得到当水解溶剂为偶极类溶剂乙腈时,得到产物的选择性最高。并通过进一步优化实验操作条件,得到当溶剂加入量为v(乙腈):v(溴代异戊烯)=1:1,水解温度为70℃,碱用量为n(NaOH):n(溴代异戊烯)=1.2:1和反应时间为25min时,水解部分3-甲基-2-丁烯-1-醇的转化率最高可达63.35%。水解后的料液通过间歇精馏得到纯的3-甲基-2-丁烯-1-醇,最终的3-甲基-2-丁烯-1-醇总收率达到57.4%。     

水热改性SO_4~(2-)/ZrO_2催化剂的制备及其对酯化反应的催化性能

通过水热改性氢氧化锆制备了SO42-/ZrO2固体酸催化剂。以冰乙酸和正丁醇的酯化反应为探针反应,确定了固体超强酸的最佳制备条件。分别考察了浸渍硫酸浓度、硫酸浸渍时间和焙烧温度等对催化活性的影响。并以水热改性和未经水热改性氢氧化锆制备SO42-/ZrO2固体超强酸做了对比实验,采用XRD、BET对催化剂进行了表征。实验结果表明:水热改性氢氧化锆制备SO42-/ZrO2固体酸催化剂的最佳条件是:浸渍硫酸浓度为0.5mol/L,浸渍时间是120 m in,焙烧温度500℃。乙酸正丁酯较佳的合成工艺条件是:反应温度105~110℃,反应时间2 h,n(正丁醇)∶n(冰乙酸)=2∶1,催化剂用量占反应投料总质量的0.27%,冰乙酸的酯化率达99.1%。催化剂重复使用4次后催化活性降低5%。     

Extractive distillation of 2-methoxy-2-methylpropane + ethanol using 1-butanol as entrainer: Equilibria and simulation

Isobaric (101.32 kPa) liquid-vapour equilibrium data for the system 1-butanol + ethanol + 2-methoxy-2-methylpropane (MTBE) were determined and fitted with Wilson, NRTL and UNIQUAC equations, and their prediction by various group contribution methods (ASOG and modified and unmodified UNIFAC methods) was examined. The NRTL equation was used to calculate, by simulation, the influence of plate number and entrainer/feed flow ratio on the quantity and composition of the distillate afforded by extractive distillation of azeotropic MTBE + ethanol using 1-butanol as the entrainer. The quantity of distillate and its MTBE content both increased with plate number, and the quantity of distillate also increased with entrainer/feed flow rate ratio.     

固体酸S_2O_8~(2-)/Fe_2O_3-SiO_2催化合成乙酸丁酯的研究

本文研究了以S2 O82 -/Fe2 O3 -SiO2 固体酸为催化剂 ,以乙酸、丁醇为原料合成乙酸丁酯 ,考察了影响反应的因素 ,结果表明最佳工艺条件是 :固体酸催化剂前驱体经微波陈化处理 ,醇酸摩尔比为1.2∶1,催化剂用量为 0 .8g(乙酸用量为 0 .2mol的情况下 ) ,带水剂为 10mL ,反应时间为 3.0h ,酯化可达到97.7% ,可重复利用 6次以上