粗煤气中硫化氢脱除与利用的探讨

分析了采用克劳斯硫回收装置脱除硫化氢工艺生产过程中存在的问题。在对生产实际分析和科学化验的基础上,探讨采用WSA技术,利用粗煤气中的废气硫化氢生产工业浓硫酸的可行性。     

二氧化氯催化氧化H酸废水

采用浸渍法制备Ni-Zn/γ-Al₂O₃催化剂,用于二氧化氯催化氧化处理染料中间体H酸废水,研究废水初始pH、二氧化氯加入量、催化剂用量、反应时间和催化剂重复使用等因素对H酸废水TOC去除率的影响。最佳实验条件为：pH为中性偏碱性范围,V(二氧化氯)∶V(废水)＝0.20,Ni-Zn/γ-Al₂O₃催化剂的加入量为20 g·L^－1,反应时间60 min,Ni-Zn/γ-Al₂O₃催化剂能连续使用7次而保持稳定的催化活性,对H酸废水的TOC去除率为75.94%,与单独化学氧化效果相比,TOC去除率提高了191%。     

人甲型流感病毒H1N1亚型NS1蛋白的原核表达及纯化

目的表达并纯化人甲型流感病毒H1N1亚型NS1蛋白。方法用RT-PCR法从人甲型流感病毒株A/PR/8/34(H1N1)中扩增NS1基因,克隆入原核表达载体pTXB1,构建重组原核表达质粒pTXB1/NS1,经酶切鉴定后,转化大肠杆菌BL21(DE3),IPTG诱导表达,SDS-PAGE分析表达形式和表达量。经几丁质柱亲和层析纯化表达蛋白,串联飞行时间质谱仪检测其相对分子质量。结果所构建的重组表达质粒pTXB1/NS1序列完整,插入的基因片段全长690bp。以1.0mmol/LIPTG37℃诱导4h,重组蛋白表达量最高,占菌体总蛋白的50%以上。破菌上清及沉淀中均有目的蛋白表达。纯化的NS1蛋白纯度达95%以上,相对分子质量约为26000。结论已成功表达并纯化了人甲型流感病毒H1N1亚型NS1蛋白,为其进一步的研究奠定了基础。     

哈锅首台自主开发30OMWCFB锅炉设计与运行

本文介绍了哈锅首台自主型300MW循环流化床锅炉的技术特点,并着重介绍了机组在168期间的运行情况,通过运行数据与设计数据的对比可知,锅炉的设计是成功的.     

硫对蛋白核小球藻Chlorella pyrenoidosa产氢影响对比研究

文章主要针对绿藻蛋白核小球藻(Chlorella pyrenoidosa)进行了有硫和无硫培养,并对其低光强产氢及重复产氢进行了研究。研究发现,蛋白核小球藻在低光强下可持续产氢,且利用重复产氢的方法可以提高蛋白核小球藻的总累积产氢量,延长产氢时间。蛋白核小球藻在有硫和无硫培养条件下的产氢明显不同,在有硫产氢条件下,蛋白核小球藻停止产氢后,可在加入乙酸钠培养后重复产氢;在无硫产氢条件下,蛋白核小球藻可在培养24 h后,不需添加乙酸钠而产氢,且经重复培养一次后,第二次产氢阶段的蛋白核小球藻的单次产氢量仍比第一次的产氢量高,说明蛋白核小球藻在有硫和无硫产氢条件下存在两种不同的代谢途径。     

Synthesis and electrochemistry of cubic rocksalt Li–Ni–Ti–O compounds in the phase diagram of LiNiO2–LiTiO2–Li[Li1/3Ti2/3]O2

On the basis of extreme similarity between the triangle phase diagrams of LiNiO₂–LiTiO₂–Li[Li_1/3Ti_2/3]O₂ and LiNiO₂–LiMnO₂–Li[Li_1/3Mn_2/3]O₂, new Li–Ni–Ti–O series with a nominal composition of Li_1+z/3Ni_1/2−z/2Ti_1/2+z/6O₂ (0 ≤ z ≤ 0.5) was designed and attempted to prepare via a spray-drying method. XRD identified that new Li–Ni–Ti–O compounds had cubic rocksalt structure, in which Li, Ni and Ti were evenly distributed on the octahedral sites in cubic closely packed lattice of oxygen ions. They can be considered as the solid solution between cubic LiNi_1/2Ti_1/2O₂ and Li[Li_1/3Ti_2/3]O₂ (high temperature form). Charge–discharge tests showed that Li–Ni–Ti–O compounds with appropriate compositions could display a considerable capacity (more than 80 mAh g⁻¹ for 0.2 ≤ z ≤ 0.27) at room temperature in the voltage range of 4.5–2.5 V and good electrochemical properties within respect to capacity (more than 150 mAh g⁻¹ for 0 ≤ z ≤ 0.27), cycleability and rate capability at an elevated temperature of 50 °C. These suggest that the disordered cubic structure in some cases may function as a good host structure for intercalation/deintercalation of Li⁺. A preliminary electrochemical comparison between Li_1+z/3Ni_1/2−z/2Ti_1/2+z/6O₂ (0 ≤ z ≤ 0.5) and Li_6/5Ni_2/5Ti_2/5O₂ indicated that charge–discharge mechanism based on Ni redox at the voltage of >3.0 V behaved somewhat differently, that is, Ni could be reduced to +2 in Li_1+z/3Ni_1/2−z/2Ti_1/2+z/6O₂ while +3 in Li_6/5Ni_2/5Ti_2/5O₂. Reduction of Ti⁴⁺ at a plateau of around 2.3 V could be clearly detected in Li_1+z/3Ni_1/2−z/2Ti_1/2+z/6O₂ with 0.27 ≤ z ≤ 0.5 at 50 °C after a deep charge associated with charge compensation from oxygen ion during initial cycle.     

乙烷-氧-水氧化裂解制乙烯反应的研究

研究了不同反应体系组成的乙烷造反然的反应性能,考究了乙烷－氧－水反应体系氧化裂解制乙烯的反应条件。结果表明,在不同反应体系中,以Ｃ２Ｈ６－Ｏ２－Ｈ２Ｏ氧化裂解制乙烯反应性能最佳,８００℃的乙烷转化率为８５．１％,乙烯选择性为６８．１％,乙烯收率可达５８％,Ｃ２Ｈ６－Ｏ２－Ｈ２Ｏ氧化裂解帛乙烯体系最佳工艺参数;反应温度为８５０℃,原料气组成为５０．５％,Ｃ２Ｈ６＋２５．２％Ｏ２＋２４．３％Ｈ２Ｏ停留     

2-烷氨基-3-对氟苯基-5-甲基-6-(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(3H)-酮衍生物的合成及其杀菌活性

已见含氟类有机物具有杀菌能力的报道,将氟元素引入到噻吩并嘧啶酮的衍生物之中,考查其杀菌活性。通过Gewald反应生成噻吩,产物同PPh3、C2Cl6、Et3N作用得到膦亚胺,再用对氟苯基异氰酸酯与之作用得到碳二亚胺,之后与伯胺反应得到10种新的标题化合物,其结构经1HNMR、MS和元素分析表征。生物活性测试表明,此类衍生物对常见农作物部分菌体均表现出较大的抑制作用,其中以2-正庚氨基-3-对氟苯基-5-甲基-6-(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(3H)-酮活性最好,它对棉花枯萎菌的抑制率达90%。该系列物质相对不含氟元素的同种取代基的噻吩并嘧啶酮衍生物的杀菌活性有一定程度的提高。     

聚丙烯成核剂双环[2.2.1]-庚烷-2,3-二羧酸钠的合成

以降冰片烯二酸酐为起始原料, 经水解中和和催化加氢制备了双环[2.2.1]-庚烷-2,3-二羧酸钠。通过研究催化加氢步骤中催化剂种类、催化剂用量、反应温度和反应压力等关键因素对双环[2.2.1]-庚烷-2,3-二羧酸钠的收率和纯度的影响, 获得了适宜的反应条件。实验结果表明:催化剂雷尼镍可代替文献报道的价格昂贵的钯/炭催化剂完成催化加氢反应, 在反应温度为60℃、反应压力为5MPa的条件下进行催化加氢, 双环[2.2.1]-庚烷-2,3-二羧酸钠的收率大于95%;红外光谱及核磁共振分析表明, 所得加氢产物与双环[2.2.1]-庚烷-2,3-二羧酸钠结构特征吻合。     

Male pheromone of swift moth,Hepialus hecta L. (Lepidoptera: Hepialidae)

(R)-6-Ethyl-2-methyl-2,3-dihydro-4H-pyran-4-one, (1R,3S,5R)-3-ethyl-1,8-dimethyl-2,9-dioxabicyclo[3.3. 1]non-7-ene, and (1R,3S,5R)-3-ethyl-1,8-dimethyl-2,9-dioxabicyclo[3.3.1]non-7-en-6-one represent the main components in the male pheromone of the swift moth,Hepialus hecta. The amounts of the three components were 40, 5, and 5 g per male, respectively. Structure elucidation of the compounds was based on spectroscopic data as compared to synthetic reference samples. The absolute configurations were determined by gas chromatography on chiral stationary phases; optically active samples served as reference compounds. Electrophysiological and behavioral experiments with natural material and synthetic samples clearly showed the three heterocyclic compounds to act as pheromones. (E, E)--Farnesene represents the main component of the scent secretion of maleHepialus humuli.