溴乙烷对芳香胺 N—乙基化的一种改进方法

本文介绍了用溴乙烷作乙基化剂对芳香胺乙基化的一种改进方法及乙基化后用NaOH 溶液中和后所得废水中溴化钠回收利用情况。其中废水中溴化钠回用率在90%至95%;溴乙烷转化率接近理论值。     

溴化物价格

美国大湖化学公司宣布将增加所有以溴为基础加工的产品的价格。自1985年1月1日生效。对于钙、钠、锌的溴化物溶液的价格每磅将提高1美分,而固体溴化钙和溴化钠每磅将提高2美分。溶液产品的价格如下:溴化钙每磅25美分,溴化锌每磅62.5美分,溴化钠每磅27美分。对于固体物的新牌价如下:溴化钙每磅71美分,溴化钠每磅56.5美分。     

农药中间体N—异丙基邻甲苯胺的合成

探索了以邻甲苯胺与2-溴丙烷合成除草剂敌草胺的中间体——N-异丙基邻甲苯胺的工艺条件,并通过实验证明在本工艺中副产的溴化钠溶液能循环使用制取2-溴丙烷。N-异丙基邻甲苯胺的产率可达90％～95％,纯度为80％～85％;2-溴丙烷的产率80％,纯度95％。     

2—（4—氯苯基）—3—甲基丁腈合成中溴化钠回收技术及其循环利用

叙述了从丁腈合成后产生的废碱液中回收溴化钠的方法和过渡废液的循环利用。由试验证实回收的溴化钠对合成溴代异丙烷无影响，过滤废液地丁腈合成无影响。介绍了利用回收的溴化钠合成溴代异丙烷的方法，同时简单介绍了回收的溴化钠工业级的方法。     

全氟环氧丙烷的电化学法合成研究：Ⅰ氧化媒质NaBr溶液 …

在由离子膜分隔的电解槽中电解溴化钠溶液，所产生的含溴阳极液和碱性阴极液，分别是由全氟丙烯合成全氟环氧丙烷的环氧化剂和皂化剂。本文实验研究了电解过程并获得了较合适的工艺条件。     

2─（4─氯苯基）─3─甲基丁腈合成中溴化钠回收技术及其循环利用

叙述了从丁腈合成后产生的废碱液中回收溴化钠的方法和过滤废液的循环利用。由试验证实回收的溴化钠对合成溴代异丙烷无影响，过滤废液对丁腈合成无影响。介绍了利用回收的溴化钠合成溴代异丙烷的方法，同时简单介绍了回收的溴化钠达工业级的方法     

一种有机合成中间体对乙酰氨基苯甲酸的合成方法

正一种有机合成中间体对乙酰氨基苯甲酸的合成方法,包括如下步骤:将5mol的对氨基苯甲酸溶于1.5L～1.8L甲酸溶液中,控制搅拌速度(130～150) r/min,加入(6～6.5)mol的甲乙酸酐,升高溶液温度至50℃～55℃,继续搅拌70min～90min,减压蒸馏50min～70min,剩余溶液中加入2L～3L氯化钾溶液,降低溶液温度至10℃～15℃,析出晶体,过滤,用溴化钠溶液洗涤,在乙醚溶液中重结晶,脱水剂脱水,最终得产品对乙酰氨基苯甲酸;其中,步骤所述的甲     

5-氟-2-溴苯甲酸的制备实验研究

以醋酸做溶剂，醋酸钴、醋酸锰、溴化钠做催化剂，用氧气常压氧化5—氟—2—溴甲苯制备5—氟—2溴苯甲酸，反应温度120一130℃，物料浓度16．8％一20．2％，催化剂用量为物料的2．5％一4％时，收率较高。     

一种高效无污染合成丙酮酸乙酯的新方法

研究了由次氯酸钠和溴化钠催化氧化乳酸乙酯合成丙酮酸乙酯新工艺，并通过正交试验设计方法。得出最佳实验操作条件；温度为30℃以下，反应时间为8h，溴化钠与乳酸乙酯的摩尔比为1：2，盐酸与溴化钠的摩尔比为1：1.4，不采用光照，并由此得到丙酮酸乙酯最好收率为82.86%（文献值为80.2%)。乳酸乙酯的转化率为100%。     

促进剂M合成新工艺

改进了２－巯基苯并噻唑（促进剂Ｍ）的合成工艺。采用苯胺为主要原料，先与二硫化碳生成Ｎ－取代含硫化合物，再在浓硫酸和溴化钠存在下合环反应得产物，反应均在常温常压下进行，产率达９０％。     

Study of borosilicate glaze opacification by phosphates using Kubelka-Munk model

The aim of this work was to study the effects of additions of sodium metaphospahte (1–50 _Wt.%) on optical properties of a conventional borosilicate glaze.The optical properties were evaluated by diffuse reflectance measurements. The absorption and the scattering properties of the obtained glazes, were explained through the Kubelka-Munk model. The structural and microstructural properties were determined by X-ray diffraction and Scanning Electron Microscopy. It was shown that white opaque borosilicate glazes can be obtained for an addition of 5 Wt% to 50 Wt% of sodium metaphosphate and 20 Wt% seemed the optimum amount to obtain a perfect white opacity. The opacification process is based on the light scattering phenomenon wherein the nature of the scattering centers vary depending on the amount of sodium metaphosphate addition. In the case of 20 Wt% scattering centers have been identified as Ca₁₀(PO₄)₆O and NaCa(PO₄) crystals formed by a devitrification process.     

磁性塑料卷材的研制与应用

磁性塑料卷材由ＣＰＥ树脂、助剂以及磁粉、经塑炼、压延成型的一种柔性薄 强磁性材料。为使大量磁粉（约９０Ｗｔ％－９２Ｗｔ％）能均匀分散在少量树脂（约６Ｗｔ％－７Ｗｔ％）中，必须对磁粉的分散性及其颗粒形状等方面进行研究。     

聚酰胺/硅胶吸附剂在茶多酚提取中的应用

介绍了用聚酰胺／硅胶吸附剂提取茶叶中茶多酚,提取率达12％,茶多酚纯度达85％～90％。     

Aqueous solution polymerization of neutralized acrylic acid using Na 2 S 2 O 5 /(NH 4 ) 2 S 2 O 8 redox pair system under atmospheric conditions

Thickening is one of the main attributes of high molecular weight poly(sodium acrylate) as a water-soluble polymer. The acrylate polymer was prepared through polymerization of NaOH-neutralized acrylic acid in aqueous solution. The reaction mixture was open to the atmosphere, providing unrestricted access to oxygen. The sodium metabisulfite/ammonium persulfate redox system was used as an initiator in the free-radical polymerization. After prevailing on a few synthetic practical problems, certain parameters affecting the reaction and product characteristics were studied. The parameters were the initiator and monomer concentration, reaction temperature, pH, and chain transfer agent (i.e., isopropanol). As-synthesizedpolymers were purified and evaluated viscometrically by a Brookfield viscometer (0.5 Wt% polymer solution in distilled water at 25°C). Intrinsic viscosity, [ m ], was also measured to calculate the viscosity average molecular weight (M v ) based on the corresponding Mark-Hawink-Sakurada equation. Changes of the isolated polymer yield, viscosity, M v , and a couple of indirect kinetic factors including gelation/reaction times and temperature were investigated according to the mechanism and known kinetic relationships of the free-radical addition polymerization. Finally, a useful Brookfield viscosity-M v curve was obtained and suggested to use for facile estimation of the average molecular weight of a typical poly(sodium acrylate) sample having medium to high molecular weight.     

EF-2型特种氧化铁精脱硫剂的特性及工业应用

ＥＦ－２型氧化铁精脱硫剂由Ｆｅ２Ｏ３和特种添加剂组成。具有脱硫精度高、反应速度快、工作硫容量大、强度高、耐水性好、适用温度范围广、价格低等特点。可在无Ｏ２或高ＣＯ２气氛中应用。已在合成甲醇、合成氨、食品ＣＯ２、变换气、ＣＯ２再生气、天然气等工艺中成功应用,效益显著,具有广阔的应用前景     

Cyclopropenoid and Fatty Acid Composition of Kydia calycina Seed Oil

The seed oil of Kydia calycina is found to contain the following acids (Wt%): Lauric 3.7, myristic 6.0, palmitic 4.9, stearic 11.4, arachidic 2.8, behenic 2.5, oleic 60.6, linoleic 5.3, and cyclopropenoid fatty acid content 2.9.     

膨润土泥浆复合解凝剂的研究与应用

以膨润土为原料,采用单因素分析、正交法等实验方案,研制出了一种复合解凝剂。该复合解凝剂以三聚磷酸钠、HL-2、焦磷酸钠、草酸钠为主要原料配制而成,当各组分间的比例为2:2:1.5:1时,对膨润土有较好的解凝效果。在含水率为60%的膨润土泥浆中,加入0.60～0.65%的复合解凝剂,可获得最佳的解凝效果,其流动度可控制在18s以内。     

Combustion Aspects of Sodium Azide and its mixtures with potassium perchlorate and burning catalysts

Linear burning rate, thermal aualysis, temperature profile, flame structure and cryogenic burnability for the mixtures of sodium azide (SA) of different particle sizes (3.5 μm, 22 μm, and 67 μm), potassium perchlorate (KP) and with or without three kinds of burning catalysts (GeO₂, Er₂O₃, and Y₂O₃) have been investigated. The linear burning rates increase with the KP content up to 33Wt% for similar SA particle size. The temperature-time histories in the vicinity of burning surface were obtained with 20 μm Type K thermocouple embedded in a Strand. The burning surface temperaturres of neat SA and of the SA/KP mixtures are nearly 350°C and 350°C ∼ 550°C, respectively, while the existence of the decomposition surface at 250 °C and condensed layer was suggested with SA/KP mixtures. In visual observation for the flame structure, the front of luminous flame zone appers to be in contact with the condensed phase surface. For example, however, the temperature profile suggests that there exists finitc distance from decomposition surface to flame front in the order of 0.05 mm ∼ 0.1 mm at 1 MPa for SA/KP = 80/20. The differential thermal analysis indicates that the tested catalysts have retarding effect on SA combustion, but a positive effect on neat KP decomposition in spite of being impotent for the burning rate increase of the SA/KP mixture. It was also found that SA strands containing appropatiae fractions of KP can hurn even in liquid nitrogen.     

外加剂对石英-水系统性能影响的研究

研究了外加剂碳酸钠、腐植酸钠和陶瓷碱水剂 (AST)对石英—水系统相对粘度的影响 ,确定了石英—水系统合适的外加剂及其加入量。实验证明 :外加剂的加入会使石英—水系统的相对粘度降低 ,且无论系统静置与否 ,碳酸钠都是一种较好的外加剂 ,其加入量在 0 .1%左右为宜 ;当系统静置时 ,加入腐植酸钠降低相对粘度的效果最好 ,加入量在 0 .0 5 %左右为宜。     

焦磷酸钠在硅线石和微斜长石表面选择性吸附的机理研究

运用表面电性研究和Ｘ射线光电子能谱分析,探讨了焦磷酸钠在经Ａｌ＾３＋和Ｆｅ＾３＋活化后的硅线石和微斜长石表面上的选择性吸附机理,推断造成焦磷酸钠吸附特性差异的本质原因是微斜长石表面的Ａｌ＾３＋具有更高的化学活性,进而导致焦磷酸钠估先在微斜长石表面吸附。研究结果表明：焦磷酸钠不仅与微斜长石矿物表面的金属离子发生化学吸附,而且还与矿浆中的金属离子反应生成难溶络合物并沉积在矿物表面,导致矿物强烈亲水。