新型油田污水处理剂CJ-1的絮凝性能研究

用新型二硫代氨基甲酸盐CJ-1处理模拟油田污水,考察了絮凝条件与其絮凝作用效果的关系,获得最适宜的絮凝条件。结果表明,在保持絮凝体系的温度为40℃、pH为4～8、搅拌速度40 r/min、搅拌时间5 min、沉降时间30 min、DTC的投加量为20 mg/L、Fe2+投加量为5 mg/L时,含油350 mg/L、悬浮物55.1 mg/L、CODCr为802 mg/L、浊度为155 NTU的模拟油田污水经CJ-1絮凝处理后,其含油量、悬浮物、CODCr、浊度分别降至3.2 mg/L、0.254 mg/L、100 mg/L、0.8 NTU,相应去除率分别为99.1%、99.5%、87.5%和99.5%,铁离子残留量为0.075 mg/L。同时考察了Na+、Ca2+、Mg2+、Cl-、HCO3-等无机盐离子对CJ-1絮凝性能的影响。     

Evaluation of sintering stresses of an Al2O3 powder with a self-loading apparatus

The sintering stress of an Al₂O₃ powder, σ_s, is evaluated from an equation σ_s = F_s/ρS_a, where F_s is the uniaxial tensile force necessary to just stop the sintering contraction, ρ is the relative density, and S_a is the cross-sectional area. During densification, σ_s increases to the maximum at a relative density of 85%, and then abruptly decreases. The variation of σ_s in the intermediate sintering stage suggests a simple cubic packing of particles. Densification in the final sintering stage is explained by shrinkage of the pores at the corners where four tetrakaidecahedra meet. The present surface tensions of the Al₂O₃ powder evaluated from the σ_s roughly equal a reported value.     

sw8-9-3井混注可降解纤维压裂施工分析

为解决压后返排支撑剂回流问题,对东北分公司sw 8-9-3井进行了全程纤维加砂施工。现场实验和文献调研证明,纤维可提高压裂液携砂能力,有利于提高支撑缝长,改善裂缝中支撑剂的分布剖面。该井后不关井直接进行压裂液快速返排,排液时间显著缩短,返排效率高。加入纤维可以减缓支撑剂的沉降速度,提高悬砂性能,因此可进一步考虑减少聚合物等增粘剂的加入量,最大限度保护储层,优化导流能力,提高产量。     

ω-Alkyl-ω-Nitroacetophenones

Nitroketones of the formula Ar. CO. CHR. NO₂ are best obtained by chromic acid oxidation of the easily accessible corresponding nitroalcohols. The nitroketones form stable salts with secondary amines. A series of ω-nitro-ω-(2-furfurylidene) - acetophenones has been synthesized. The infrared spectra of the new compounds prepared have been determined and are discussed.     

Investigations on the synthesis of Bi3NbTiO9 ceramics

The perovskite-layered ceramics of Bi₃NbTiO₉ (BNT), also known as Aurivillius phase, was obtained. The process of preparation was investigated by X-ray diffraction method. The synthesis of BNT was carried out according to the solid-state reaction from the conventional mixture of oxides (Bi₂O₃, TiO₂, Nb₂O₅) within the temperature range T_S=400–1200°C. The influence of addition of NaCl on the process of synthesis was also investigated. It was found that above T_S=900°C the ratio of the Bi₃NbTiO₉ phase was almost 90% and the admixture of NaCl decreased the synthesis temperature. Dependence of the amount of the BNT phase in the bulk material versus the temperature of synthesis is given. Evolution of the structural parameters of BNT and NaCl - modified BNT at different synthesis temperatures was shown as well as recording of Raman scattering spectra.     

9,9-二(3-甲基-4-胺基苯基)芴的合成研究

用工业芴酮和邻甲基苯胺为原料,在158～160℃下合成了9,9-二(3-甲基-4-胺基苯基)芴.分析了芴酮和邻甲基苯胺的投料比、反应温度、反应时间、溶剂甲苯的加入量的不同对产品收率的影响.9,9-二(3-甲基-4-胺基苯基)芴采用元素分析、HPLC和荧光光谱等对产品纯度、杂质含量和结构进行分析验证.     

手性配体1,4-双(9-O-奎宁)-2,3-二氮杂萘的简便合成方法

在NaH存在下,以DMF为溶剂,在温和条件下合成了手性配体1,4-双(9-O-奎宁)-2,3-二氮杂萘,最后用重结晶方法得到纯品,为大量合成该配体提供了可行的方法。     

Unexpected opioid activity profiles of analogues of the novel peptide kappa opioid receptor ligand CJ-15,208

An alanine scan was performed on the novel κ opioid receptor (KOR) peptide ligand CJ‐15,208 to determine which residues contribute to the potent in vivo agonist activity observed for the parent peptide. These cyclic tetrapeptides were synthesized by a combination of solid‐phase peptide synthesis of the linear precursors, followed by cyclization in solution. Like the parent peptide, each of the analogues exhibited agonist activity and KOR antagonist activity in an antinociceptive assay in vivo. Unlike the parent peptide, the agonist activity of the potent analogues was mediated predominantly, if not exclusively, by μ opioid receptors (MOR). Thus analogues 2 and 4 , in which one of the phenylalanine residues was replaced by alanine, exhibited both potent MOR agonist activity and KOR antagonist activity in vivo. These peptides represent novel lead compounds for the development of peptide‐based opioid analgesics.     

3-溴丙酸的简便合成

3-溴丙酸是有机合成常用的化合物 ,将氢溴酸直接和丙烯酸反应 ,就可得到 3-溴丙酸 ,其反应条件简单易行 ,时间短 ,产率高。在 2 5 0 m L的三颈瓶中 ,加入 40 %的氢溴酸45 .0 g( 0 .2 3mol) ,加热 ,回流下滴加 1 1 .0 g( 0 .1 5 mol)的丙烯酸 ,加完后继续回流反应 1 h。停止加热 ,待温度稍稍下降后 ,常压蒸馏 ,当馏出液温度达到 1 2 0℃时停止蒸馏。用四氯化碳 ( 30 m L× 3)萃取产物 ,合并有机相 ,常压蒸馏至无四氯化碳流出 ,蒸馏瓶中剩余物即为 3-溴丙酸 ,冷却后为白色固体。产量 2 1 .0 g,产率 91 %。 mp61～64℃。进一步提纯可用四氯化…