类球形低硫磷酸铁的制备技术研究

磷酸铁（FePO₄）是锂电池正极材料磷酸铁锂（LiFePO₄）的核心前驱体,FePO₄形貌及硫含量对合成的LiFePO₄材料性能有重要影响。为得到类球形低硫FePO₄产品,在传统液相沉淀法技术基础上做了改进优化,添加十六烷基三甲基溴化铵（CTAB）作为形貌助剂提高产品球形度,添加氨水作为配体形成磷酸铁铵配合物改善结晶过程,降低产品硫含量。结果表明：所制备的FePO₄产品硫质量分数低,达到2.6×10 ^-5,形貌为均一的微米类球形颗粒,D₅₀=11.4 μm,振实密度达到1.22 g/cm ³,有望成为制备高压实密度LiFePO₄材料的核心前驱体。     

氯酸钠-硫磺法制二氧化氯的研究

对硫磺还原氯酸钠制备二氧化氯的工艺条件进行了研究 ,反应的最佳条件是 :温度为 60～70℃ ,氯酸钠浓度为 4～ 5 mol/L,反应液中维持硫酸浓度为 1 mol/L以上。该法具有反应温和易于控制、硫酸消耗少、成本低廉和产品纯度高的优点     

ESTIMATION OF VAPOR PRESSURES OF ORGANIC NITROGEN AND SULFUR COMPOUNDS BY A GROUP-CONTRIBUTION METHOD

The group-contribution method for vapor pressures of hydrocarbons and organic compounds containing nitrogen or sulfur, based on the kinetic theory of fluids, is revised and extended to include new groups containing nitrogen or sulfur. Good representation is obtained for vapor pressure data in the region 1.30-270 kPa. The method may be used to estimate vapor pressures and enthalpies of vaporization for those organic fluids containing nitrogen or sulfur, where no experimental data are available.     

氯乙酸生产工艺的改进与探讨

介绍了影响氯乙酸质量、消耗的因素,探讨了对氯乙酸工艺的改进措施。     

采用有机盐─石膏脱硫剂的烟气脱硫新工艺

介绍一种利用有机羧酸盐作为吸收剂、以熟石灰作还原剂的烟气脱硫系统，在日本投入生产运行，其脱硫效率达９０％以上。     

固体硫在超临界/近临界酸性流体中的溶解度(Ⅰ)实验研究

建立了1套静态法测定难挥发物质(固体或液体)在超临界/近临界流体中溶解度的实验装置,并测定了固体硫在近临界硫化氢、超临界CO_2、CH_4及富硫化氢酸性气体混合物中的溶解度数据,取得了较好的结果.     

Defensive role ofAllium sulfur compounds for leek mothAcrolepiopsis assectella Z. (Lepidoptera) against generalist predators

It has been shown previously that sulfur volatiles produced byAllium plants affect the behavior of their specialist phytophages and of their specialist entomophages. The action of these compounds in protecting the leek mothAcrolepiopsis assectella against generalist entomophages was studied in comparison to the proposed original defensive role of these compounds against generalist herbivorous insects. Two ants species,Formica selysi andF. fusca, were used as generalist predators. Six behavioral criteria of the predatory behavior of the ants were studied in presence of the last-instar caterpillars (C₅). C₅ reared on artificial diets with or without leek components were tested, as well as C₅ soaked in frass of leek-reared caterpillars or disulfide solutions. In addition, the response of the ants to pure chemicals found in leek was studied using honey solutions with or without sulfur compounds. The sulfur allelochemicals ofAllium plants have a negative action on predatory ants. Interestingly, the nonvolatile precursors of sulfur volatiles ofAllium plants seem to have a protective role for their phytophagous insects against generalist entomophages.     

碱渣脱除锌冶炼烟气中SO2的工艺

利用水合肼生产过程中副产的碱渣(含Na2CO3.10 H2O)吸收锌冶炼烟气,得到结晶亚硫酸钠。重点考察了尾气中SO3含量、碱液比重、中和液pH值对脱SO2工艺、效率和产品的影响。     

不同分散剂对细粒高硫煤及煤系黄铁矿的选择性分散

主要研究六偏磷酸钠和腐植酸纳２种分散剂分别对细粒高硫煤、煤系黄铁矿悬浮液的分散作用，考察了分散剂用量、介质ｐＨ值对细粒煤与煤系黄铁矿选择性分散的影响。     

常压脱高硫浅议

就用常压塔脱高硫从流程设置、设备选择、工艺条件控制以及硫回收几方面进行讨论,并着重阐述了脱硫塔、再生槽的设计要求以及吸收、再生、熔硫的工艺条件。