大孔吸附树脂处理含磺胺废水的研究

利用大孔吸附树脂处理含磺胺废水。实验表明，DRHⅢ树脂对磺胺具有良好的吸附－解吸效果。原废水中磺胺浓度约为17.2g/L,COD约为13750mg/L，经树脂吸附处理后，废水中COD去除率约86％，磺胺的吸附率88．2％，树脂的解吸率为97．5％，磺胺的回收率约86．0％，其纯度达99．8％。在废水有效处理的同时实现了废物资源化，具有良好的环境效益和较高的经济效益。     

树脂吸附法处理对苯二胺生产中含对硝基苯胺工业废水的研究

以大孔吸附树脂对含对硝基苯胺工业废水进行了治理研究。结果表明,CHA-101大孔吸附树脂对该废水的吸附处理效果良好,处理后废水中对硝基苯胺含量可降低至3mg/L以下,去除率达99％以上;树脂脱附再生的同时可回收对硝基苯胺。     

树脂吸附法处理1,4-二羟基蒽醌生产废水的研究

本文研究了树脂吸附法处理1,4-二羟基蒽醌生产废水。结果表明,NDA-404大孔吸附脂对该废水具有良好的吸附-脱附效果。原废水中邻苯二甲酸浓度约为4700-12000mg/L,CODCr约为6800-24000mg/L,经树脂吸附处理后,邻苯二甲酸的吸附率≥99.5%,CODCr去除率≥99.5%,树脂的脱附率为100%。邻苯二甲酸的回收率≥80%,在废水有效处理的同时实现了废物资源化。     

大孔树脂对对硝基苯胺的吸附行为及其应用研究

研究了溶液中无机盐、pH值对氨基修饰超高交联大孔树脂NDA-99、氧修饰超高交联大孔树脂NDA-150和大孔树脂XAD-4吸附对硝基苯胺的影响。结果表明,无机盐对吸附影响不大;NDA-99、NDA-150在中性范围吸附量最大,XAD-4的吸附量随pH增大而增大;3种树脂的吸附等温线都能很好的利用Freundlich方程进行拟合,吸附皆为放热反应且为优惠吸附;3种树脂的饱和吸附量大小依次为NDA-150>NDA-99>XAD-4。依据上述结论,采用NDA-150处理对硝基苯胺生产母液废水,每批次处理量为40BV,废水中对硝基苯胺浓度由2130mg/L降至9.6mg/L,去除率达99.5%,吸附后的树脂采用95%的乙醇可完全再生,高浓度对硝基苯胺乙醇再生溶液经蒸馏可回收对硝基苯胺和脱附剂,实现了废水治理与资源化的统一。     

吸附法处理甲苯二异氰酸酯 (TDI) 硝化碱洗废水的研究

采用DRH-1型树脂吸附处理甲苯二异氰酸酯 (TDI) 生产过程中产生的硝化碱洗废水,原废水中硝基苯类含量为1.6×103mg/L~4.6×103mg/L,COD为2.87×103mg/L~6.38×103mg/L,经酸化沉淀-树脂吸附处理后,出水硝基苯类可达到污水综合排放一级标准,COD为241mg/L~479mg/L,再经催化氧化处理后,COD能稳定在200mg/L以下.树脂解吸后可重复使用,解吸液蒸馏回收溶剂后,釜内残液中含生产TDI的中间体达50%以上.     

树脂吸附法处理水杨酸甲酯生产废水的研究

采用吸附树脂NDA—99处理水杨酸甲酯生产废水，结果表明该树脂时废水中的5磺基水杨酸及水杨酸均具有良好的吸附—脱附性能．废水经预处理和吸附处理后，CODCr由57000-59000mg／L降至6300mg／L左右，去除率接近89％．用IBV8％NaOH 3BVH2O作脱附剂，在温度为60℃、流量为IBV／h的条件下，脱附率接近100％，树脂可重复使用．高浓度脱附液经酸化、浓缩、冷却结晶，可回收5—磺基水杨酸，回收率为95％左右。纯度为78％。     

以弱碱性树脂处理CLT酸废水的研究

筛选得大孔弱碱性阴离子交换树脂D301R进行CLT酸吸附分离研究．考察了pH值、温度，时间等因素对吸附分离性能的影响。在适宜的工艺条件下CLT酸母液的CODcr的去除率达96％以上，且处理后出水CODcr低于100mg／L,同时也进行了柱动态吸附和洗脱再生实验。结果表明，以D301R树脂可有效的去除CLT酸废水中的CODcr，且以NaOH为洗脱剂可实现树脂的再生。     

树脂吸附法深度处理焦化废水

将树脂吸附剂应用于焦化废水的深度处理,考察了温度、投加量、初始pH、时间和流速对CODcr和色度去除效果的影响.静态吸附实验确定了最佳吸附树脂为NDA-99型树脂,最佳投加量为3.00g/L,无需调节pH,最佳温度为303K,吸附等温线满足Freundlich方程.通过动态实验确定了最适宜工艺条件为:流速20BV/h,单柱废水处理量为200BV/批;处理后废水中CODcr浓度从199mg/L降到100mg/L以下,色度从98倍降到50倍以下.使用8％的NaOH溶液脱附再生,最佳脱附流速为5BV/h.     

树脂吸附法处理周位酸废水的研究

本文研究了树脂吸附法处理周位酸废水的工艺条件。实验结果表明，周位酸废水经絮凝沉淀，再采用Ｈ－１０３吸附树脂吸附处理，氨基值去除率可达８４％，ＣＯＤｃｒ去除率可达８８％。脱附率可达９９％。     

应用大孔吸附树脂从农药废水中回收毕克草

毕克草为一种新型除草剂,通常情况下很难被降解,本文利用物理吸附原理通过自行制备的大孔吸附树脂从农药水中对其进行了回收,回收效果良好,同时也达到了废水处理的目的。优化的最佳实验条件:室温下,pH=1.0以及流速为5BV/h时,对COD为15000mg/L的毕克草废水吸附处理后,其出水可达《污水综合排放标准》(GB89—1996)中的一级排放标准;洗脱再生时,室温下,用95%的乙醇洗脱,流速为2BV/h,(即2倍树脂床体积/h)回收率可达98.4%,纯度达93.7%,总流程一次可处理该废水240mL。     

Synthesis and Crystal Structure of a New Mononuclear Cu(II) Complex with 4,4''''-Dimethyl-2,2''''-bipyridine

1 INTRODUCTION The use of transition metal catalysts with nitro- gen-donor ligands is expanding rapidly[1], and the most widely used nitrogen ligand is the bidentate 2, 2?bipyridine unit[2]. Copper is found to be especial- ly important in the nervous sy…     

Crystal Structure of a 4-Methyl-phenylacetylide-bridged Pt~IICu~I_2 Heterotrinuclear Organometallic Complex

1 INTRODUCTION Over the past decades, metal alkynyl complexes have attracted more and more attention due to their potential applications in conducting polymers, lumi- nescent materials and supramolecular chemis- try[1～10]. Compared to the rapid growth o…     

Isolation and Crystal Structure of Trans-2,2'''',4,4''''-tetramethyl-6,6''''-dinitro Azobenzene

1 INTRODUCTION The aconitum plants produce various diterpene and norditerpene alkaloids[1, 2]. Up to now more than 450 diterpenoid and norditerpenoid alkaloids have been isolated from the roots of this genus[3]. Sub- sequent studies on the flower of the same subspecies were directed to the other secondary metabolites such as flavonoids[4, 5]. The flavonoidic composi- tions of several oriental species of A. plants have been reported[6～8]. A. sungpanense hand. Mazz., a very highly poi- s…     

刚性4-取代双三唑配体构筑的三个锌配合物的合成和荧光

在室温下合成了3个新的配位聚合物{[Zn(4?Nbdc)(btx)]·2H₂O}_n(1·2H₂O)、[Zn(btx)_1.5(1,3?bdac)]n(2)和{[Zn(mbtx)(1,3?bdc)(H₂O)₂]·H₂O}_n(3)(btx=1,4?二(4H?1,2,4?三唑)苯,mbtx=1,3?二(4H?1,2,4?三唑)苯,4?Nbdc=4?硝基邻苯二甲酸根,1,3?bdac=间苯二乙酸根,1,3?bdc=间苯二甲酸根),测试了配合物的单晶结构,并从元素分析、红外和粉末衍射等方面进行表征。单晶X射线衍射表明,配合物1是二维(4,4)网格结构,配合物2和3都是一维链状结构。配合物2中的π?π作用将一维链连接成三维网格结构。在配合物3中,分子间氢键将一维链连接成二维网格,2套二维网格在分子间氢键的作用下相互穿插得到2D+2D→2D的网格结构。同时,还研究了3个配位聚合物的荧光和热稳定性。     

基于三联吡啶/苯三羧酸类配体构筑的两个配合物的合成、结构和性质

基于H3tbtd、H3bbta和bpy配体在水热条件下合成了配位聚合物{[Co3(tbtd)2(bpy)2(H2O)]·5H2O}n(1)和配合物[Cd2(Hbbta)(bpy)3(C2O4)(H2O)](2)(H3tbtd=4?(2,4,6?三羧基苯基)?2,2′,6′,2″?三联吡啶,H3bbta=1?氟?2,4,6?苯三酸,bpy=2,2′?联吡啶),并用元素分析、红外光谱、X射线单晶衍射等对其进行了表征。配聚物1为二维网状结构,基于丰富的氢键作用扩展形成三维超分子网结构。配合物2为双核结构,相邻的双核结构通过吡啶环之间的π…π堆积作用和氢键作用扩展为二维超分子网状结构。配聚物1在紫外光照射下对染料甲基橙(MO)的降解具有光催化活性,对紫外光催化具有良好的稳定性。此外还研究了配合物2的荧光性质和配合物1~2的热稳定性。     

Synthesis and Crystal Structure of 4,4′-Diamino-N,N′-diethyl Bisbenzenesulfamide

A new compound of 4,4′-diamino-N,N′-diethyl bisbenzenesulfamide (C18H26N4O4S2, Fw = 426.55) has been synthesized and its structure was determined by X-ray crystallography method. The crystal belongs to the monoclinic system, space group P21/c with a = 10.0623(9), b = 13.6759(13), c =15.5309(14) , β = 100.482(2)o, V = 2101.6(3) 3, Dc = 1.348 g/cm3, F(000) = 904, μ = 0.285 mm–1, Z = 4, the final R = 0.0512 and wR = 0.1363 for 3485 observed reflections with I > 2σ(I). The structure of the title compound is pseudo secondary axisymmetric, and the two sulfamide-groups show distorted tetrahedral configurations.     

两个锰配合物的合成、晶体结构及与DNA的作用

用常规溶液法由氯化锰(MnCl2·4H2O)和4-甲基-1,2,3-噻二唑-5-甲酸(HL)反应制备了配位聚合物[Mn3(L)6(H2O)4]n(1),加入配体菲咯啉(phen)后合成了配合物[Mn2(phen)4(H2O)2Cl2](L)2·3H2O (2).用元素分析、红外光谱、热重分析及单晶X射线衍射进行了配合物...     

CeO2负载的PdO与Ce1‒x Pd x O2‒δ 物种的甲烷催化燃烧性能

通过调控Pd前驱物在CeO₂上的沉积方式, 分别制备了以PdO和离子态的Ce_1?x Pd _x O_2?δ 物种为主的 Pd/CeO₂催化剂, 并采用X射线光电子能谱(XPS)和拉曼(Raman)光谱确证了这两种Pd物种的存在. 氧气程序升温脱附(O₂-TPD)和氢气程序升温还原(H₂-TPR)的表征结果显示, 相比于与载体相互作用较弱的PdO物种, 与CeO₂相互作用较强的Ce_1?x Pd _x O_2?δ 物种具有更加稳定的Pd—O键. 催化剂的甲烷燃烧反应起燃活性测试结果显示, 以PdO物种为主的催化剂表现出了良好的低温催化性能, 在原料气配比为1%CH₄/4%O₂-Ar, 空速为60000 mL·{\mathrm{g}}_{\mathrm{c}\mathrm{a}\mathrm{t}}^{-\mathrm{1}}·h^?1的条件下, T₁₀和T₉₀分别为275和367 ℃, 而两种以Ce_1?x Pd _x O_2?δ 物种为主的催化剂的T₁₀均超过420 ℃. 催化剂的甲烷程序升温还原(CH₄-TPR)表征结果表明, 在升温过程中只有当PdO或Ce_1?x Pd _x O_2?δ 物种被CH₄还原后, 催化活性才开始上升. 由于PdO物种的Pd—O键强度较弱, 有利于Pd物种上的晶格氧在较低温度下参与CH₄的氧化过程. 而Ce_1?x Pd _x O_2?δ 物种的Pd—O键较稳定, 且在反应条件下离子态Pd²⁺与反应体系中氧物种的作用较强, 进而抑制了其与CH₄的反应, 因此反应的起燃温度较高. 以γ-Al₂O₃为载体采用相同的方法制备了Pd/γ-Al₂O₃催化剂, 相关的表征结果进一步证实, 与载体相互作用较弱的PdO物种更容易被CH₄还原, 进而具有较高的催化活性. 据此可以认为Pd/CeO₂上氧化态的Pd物种被CH₄的还原性能是决定其甲烷催化燃烧反应活性的重要因素之一.     

Polarity and steric effect of the lateral substituent on the mesophase behaviour of some newly prepared liquid crystals

Eight homologous series of 2- (or 3-) substituted phenyl 4?-(4?-alkoxy phenylazo) benzoates (In_a–h) were prepared in which, within each homologous series, the length of the terminal alkoxy group varies between 6, 8, 10 and 12 carbons, while the other substituent, X, is a laterally attached polar group that alternatively changed from CH₃, H, F, Br and CN. Compounds prepared were characterised by infrared and ¹H-NMR spectroscopy, and their mesophase behaviour investigated by differential scanning calorimetry and identified by polarised light microscopy. The results were discussed in terms of polarity and steric effects. The stability of the mesophase was correlated once with the dipolar anisotropy of the whole molecule and another with the dipolar anisotropy of the substituent, X. A comparative study was made between the investigated compounds and their previously prepared linear 4-substituted isomers, namely 4-substituted phenyl 4?-(4?-alkoxy phenylazo) benzoates (In_i–k).     

Ionic liquid crystals based on viologen dimers: tuning the mesomorphism by varying the conformational freedom of the ionic layer

We investigated the liquid crystal behaviour of newly synthesised bistriflimide salts of symmetric viologen dimers. A smectic A phase was observed for intermediate spacer lengths and for relatively long lateral alkyl chains. The systems were characterised by thermal analysis, polarised optical microscopy, X-ray scattering and solid-state NMR. An intermediate ordered smectic phase was also exhibited by the compounds (except for systems with very short lateral chains) consisting of molten layers of alkyl chains and partially ordered ionic layers. These results, relating to the mesomorphic behaviour of viologen salts, are qualitatively compared to those of the more common imidazolium salts, highlighting the importance of the conformational degrees of freedom of the anions and of the cationic core. It appears that fine tuning of the conformational degrees of freedom of the ionic layer is an important component of mesophase stabilisation.