共查询到18条相似文献,搜索用时 62 毫秒
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2,3-吡啶二羧酸合成产生的尾气中含有氯气,必须完全除去氯气,尾气才可达标排放。采用亚硫酸钠溶液和氢氧化钠溶液作为尾气吸收液进行对照实验,并考察了影响尾气吸收效果的因素。实验结果表明,亚硫酸钠吸收氯气效果优于氢氧化钠,适当降低流速以及提高吸收液浓度有利于吸收氯气。用30%氢氧化钠溶液调节吸收液pH可最大程度发挥亚硫酸钠吸收氯气的能力,每50 g喹啉反应对应需要300 g 20%亚硫酸钠和500 g 30%氢氧化钠吸收尾气中的氯气。整个反应中尾气未检测到氯气及二氧化硫等有害气体,吸收效果较好。 相似文献
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2,3-萘二甲酸酐是重要的有机中间体,通常用它来合成染料、药物以及光聚合物等感光材料。简单介绍了以乙缩醛为原料,通过简单的交替步骤和马来酐反应的合成工艺。 相似文献
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介绍了5-乙基吡啶-2,3-二羧酸二乙酯的合成路线,结合试验比较分析,选择出适合工业化的清洁合成路线。两步反应得到产品,总收率为70%(以乙氧基乙酸乙酯计),含量为85%。 相似文献
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在含硫酸铜的酸性水溶液中,用氯酸钠作氧化剂,氧化喹啉得到2,3-吡啶二甲酸,产率为56·4%;以硫酸铜为催化剂,用浓硝酸在高温氧化异喹啉得到3,4-吡啶二甲酸,产率为71·4%,并讨论了影响合成的因素。在钼酸铵存在下,采用固相烘焙法,2,3-吡啶二甲酸和3,4-吡啶二甲酸分别与尿素和氯化亚铜作用得到了氮杂铜酞菁。实验发现,以3,4-吡啶二甲酸合成的氮杂铜酞菁在吡啶中具有较大的溶解度,最大吸收波长为673nm。 相似文献
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5—降冰片烯—2,3—二羧酸单甲酯的合成 总被引:2,自引:0,他引:2
由双环戊二烯热解制得的环戊二烯与顺丁烯二酸酐反应得5-降冰片烯-2,3-二酸酐(NA),再单甲酯化制得5-降冰片烯-2,3-二羧酸单甲酯(NE),产品收率可达5.62%,左右,纯度≥97%。 相似文献
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Mateusz Kowalik Joanna Masternak Iwona akomska Katarzyna Kazimierczuk Anna Zawilak-Pawlik Piotr Szczepanowski Oleksiy V. Khavryuchenko Barbara Barszcz 《International journal of molecular sciences》2020,21(22)
Two novel coordination polymers, [Bi2(2,3pydc)2(2,3pydcH)2(H2O)]n (1) and {(Et3NH)2[Bi(2,3pydc)(2,3pydcH)Cl2]}n (2) were prepared using as a prolinker pyridine-2,3-dicarboxylic acid (2,3pydcH2). The obtained complexes were fully characterized by elemental analysis, TG/DTG, FT-IR, solid-state photoluminescence, DFT calculations and single-crystal X-ray diffraction. The obtained complexes crystallized in the triclinic P-1 space group (1) and comprise dimeric units with two crystallographically different Bi(III) centers (polyhedra: distorted pentagonal bipyramid and bicapped trigonal prism) and monoclinic P21/c space group (2) with a distorted monocapped pentagonal bipyramid of Bi(III) center. The various coordination modes of bridging carboxylate ligands are responsible for the formation of 1D chains with 4,5C10 (1) and 2C1 (2) topology. The photoluminescence quantum yield for polymer 2 is 8.36%, which makes it a good candidate for more specific studies towards Bi-based fluorescent materials. Moreover, it was detected that polymer 1 is more than twice as active against H. pylori as polymer 2. It can be concluded that there is an existing relationship between the structure and the antibacterial activity because the presence of chloride and triethylammonium ions in the structure of complex 2 reduces the antibacterial activity. 相似文献
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