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涂料用新型复合催干剂 总被引:5,自引:0,他引:5
采用优质异辛酸和多种稀土金属制备完全不用钴、不含铅、可单独使用的新型复合催干剂。该种催干剂可完全取代包括钴催干剂在内的传统催干剂,而其用量只有传统催干剂用量的1/10。由其配制的涂料颜色浅,且耐低温,抗高湿。 相似文献
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<正>2.3.2"最好的代钴催干剂"——乙酰丙酮锰螯合物2.3.2.1与钴催干剂相似的催干活性和氧化机理用2,4-戊二酮(又名乙酰丙酮,分子式(CH3COCH2COCH3)和Mn制成螯合物[Mn(acac)3],acac在式中代表乙酰丙酮。这种螯合物对醇酸涂料 相似文献
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本文就各种催干剂对醇酸树脂涂膜特性的影响作了综合研究,选用研究的催干剂包括环烷酸钙,辛酸钴,辛酸锰,辛酸铅和辛酸锆。研究的特性包括硬度、附着力、韧性,膜的形成,结皮趋势,耐水耐酸性,粘度和干燥时间。结论是:催干剂不仅能干燥涂层(油漆,清漆,树脂,油墨),还对涂膜特性有明显影响。进而得出:锰、铅和锆的混合物可作为改进涂膜特性的最有前途的催干剂体系。 相似文献
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通过不饱和油类的氧化聚合而干燥的各种涂料,一般都可用催干剂提高干燥性能。常用催干剂主要成分为铅、锰、钴、锌、钙5种金届的环烷酸盐,后2种为助催干剂,与主催干剂配合使用,不仅可以加速干燥,还可克服起皱、消除丝纹,改善漆膜的表面状况。 有机酸金属皂类催干剂的制取方法有2种,熔融法(直接法)将油或环烷酸等加热至一定温度,再加入金属氧化物或其盐类进行皂化,获得透明产品。该法的缺 相似文献
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新型带锈防锈漆的研制 总被引:3,自引:1,他引:2
研制了一种新型带锈防锈漆,通过加入酸锌,氧化锌,三聚磷酸铝,铬酸钡等助剂,使金属带锈表面锈层磷化,钝化,形成连续,均匀,致密的保护层,加入0.05%-0.10%的钴锰催干剂,显著提高了漆膜的干燥速度,该带锈防锈漆制备工艺简单,成本低,长期贮存性能稳定,各项指标均符合国家标准。 相似文献
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一、概述目前我国应用于油漆中的催干剂还是沿用环烷酸钴、锰、铅、锌、钙催干剂。然而环烷酸系列催干剂存在着颜色深、气味重等缺陷。随着我国涂料工业发展,对油漆配套催干剂也提出了新的要求。事实上,发达国家的环烷酸系列的催干剂用量已日益减少,国外都在研究开发应用新型的催干剂系列产品。为了满足国内市场的需求,我厂经过一年的努力终于完成了市科委下达的“异辛酸稀土催干剂”试制任务,于1991年底通过了市科委鉴定,并受到了与会专家的一致肯定。 相似文献
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全代钴催干剂的制备与应用 总被引:2,自引:0,他引:2
本文简述了全代钴催干剂的制备,产品技术指标及其在醇酸涂料中应用的全性能检测结果。试验证实,全代钴催干剂性能与4%钴干料相当,在醇酸类涂料中,是一理想的钴干料替代品。 相似文献
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采用天然二氧化锰、豆油、苯甲酸、松香等原料制备了新型有机金属催干剂,能完全替代钴、铅等传统催干剂而单独用于涂料中。讨论了反应温度、反应时间对催干剂性能的影响,以及催干剂用量对醇酸调合漆干燥性能和贮存稳定性等的影响。试验结果表明:该催干剂工艺稳定、操作方便,性能优良、综合效益显著。 相似文献
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采用天然二氧化锰和植物油酸、松香制备了新型有机金属催干剂,该催干剂能完全替代钴、铅等传统催干剂而单独用于涂料中。研究了天然二氧化锰的种类、聚合温度、反应时间对催干剂性能的影响,研究了催干剂用量对醇酸磁漆干燥性能和贮存稳定性等性能的影响,结果表明该催干剂的工艺稳定、操作方便、性能优良,综合效益显著。 相似文献
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PTA氧化催化剂技术及其应用 总被引:3,自引:0,他引:3
PTA氧化生产采用钴锰溴三元复合催化体系,现采用多种复合形态的催化剂。笔者综合比较固态的钴锰醋酸盐、溶液态钴锰溴催化剂及溶液态钴锰溴化物复合催化剂。分析表明这3种形态的催化剂催化性能相当,PTA生产的单位消耗相近;溶液态钴锰溴化物复合催化剂使用方便且制造成本较低。 相似文献
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Abstract The Boleo leach solution contains large amounts of manganese (45 g/L), magnesium (25 g/L) and small amounts of cobalt (0.2 g/L) and zinc (1 g/L) in sea water. Due to the high manganese concentration, it is very difficult to separate cobalt and zinc from manganese, magnesium, and calcium using conventional solvent-extraction processes, which has led to the development of a synergistic solvent extraction (SSX) system consisting of Versatic 10 and LIX®63. By adding 0.4 M LIX 63 to 0.5 M Versatic 10, large synergistic shifts were obtained for cobalt (max. ΔpH50 4.24) and zinc (max. ΔpH50 1.62). After a single contact at pH 4.5, the extraction of cobalt was almost complete and that of zinc 80%. The extraction of manganese was 1.55%, and almost no magnesium and calcium were extracted, indicating excellent separation of cobalt and good separation of zinc from manganese, magnesium, and calcium. The SSX system was further optimized to reduce the co-extraction of manganese with the synthetic Boleo demonstration plant solution. It was found that with 0.33 M Versatic 10 and 0.30 M LIX 63, the SSX system composition approached optimum. After a single contact at pH 5.5, the extractions of cobalt and zinc were 93% and 70%, respectively, while the manganese concentration in the loaded organic solution was only 0.28 g/L. The extraction and stripping kinetics of cobalt and zinc were rapid. The SSX system was tested in two integrated pilot-plant trials with excellent results. Baja Mining has planned to implement the SSX circuit in their future Boleo plant. 相似文献
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Alfred Fischer 《Journal of the American Oil Chemists' Society》1966,43(7):469-471
To be useful in the manufacture of driers, a carboxylic acid must yield lead, cobalt, manganese, calcium and zinc soaps which
are soluble in paint vehicles and petroleum hydrocarbon thinners. The drying metal soaps of a number of saturated branched
chain carboxylic acids were prepared to determine the relationship of acid structure to metal soap solubility. It was found
that with the exception of 4-ethyl-5,5-dimethyl-hexanoic acid those branched chain acids containing at least six carbon atoms
in the longest straight chain yielded soluble drying metal soaps and were therefore useful in drier manufacture. soluble “basic”
lead soaps, pale-colored manganese soaps and reddish purple cobalt soaps were obtained from acids lacking in alpha branching.
Alpha-branched acids yielded insoluble basic lead soaps, dark manganese soaps and dark blueviolet cobalt soaps. 相似文献
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Johan P. den Breejen Anne M. Frey Jia Yang Anders Holmen Matti M. van Schooneveld Frank M. F. de Groot Odile Stephan Johannes H. Bitter Krijn P. de Jong 《Topics in Catalysis》2011,54(13-15):768-777
A highly active and selective manganese oxide-promoted silica-supported cobalt catalyst for the Fischer?CTropsch reaction is reported. Co/MnO/SiO2 catalysts were prepared via impregnation of a cobalt nitrate and manganese nitrate precursor, followed by drying and calcination in an NO/He flow. The catalysts were studied with STEM?CEELS, infrared spectroscopy measurements of adsorbed CO and Steady-State Isotopic Transient Kinetic Analysis experiments. Based on those experiments, a relation between C5+-selectivity and surface-coverages of CH x -intermediates on cobalt was found. 相似文献
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通过热力学理论计算预测Me-OH-, Me-OH--NH3体系溶液中金属离子浓度与pH值的关系,分析了不同配合-沉淀体系中铝与钴、镍、锰的分离性能,采用水解-沉淀法除铝. 结果表明,在Me-OH--NH3和Me-OH--NH3-CO32-体系中,铝与镍、钴、锰分离效果较好,在Me-OH--NH3-CO32-体系中生成的Al(OH)3过滤性能较好. 在Me-OH-- NH3-CO32-体系中,pH=4.5时,镍、钴、锰回收率分别为98.57%, 99.63%和99.91%,铝去除率为99.94%. 相似文献
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以乙酰丙酮锆或乙酸锆与乙酸钴和乙酸锰制备乙酸钴/乙酸锰/乙酰丙酮锆或乙酸锆(Co/Mn/Zr)三元复合催化剂。比较乙酸钴(Co)、乙酸钴/乙酸锰(Co/Mn)和Co/Mn/Zr催化剂体系对甲苯液相氧化反应的催化性能。结果表明:在催化剂中添加Zr可以降低反应温度,提高甲苯转化率和苯甲酸选择性。与乙酸锆相比,采用乙酰丙酮锆制得的Co/Mn/Zr具有较好的催化活性。在Co,Mn和Zr物质的量之比为5 5 1,Co与甲苯的物质的量之比为1 10 000,溶剂乙酸与甲苯质量比为1 2.3,反应温度160℃和反应压力1.4 MPa的条件下反应3 h后,苯甲酸选择性和甲苯转化率分别为80.2%和15.4%。 相似文献