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2,6-二乙基苯胺基乙基丙基醚的合成 总被引:1,自引:0,他引:1
以2,6-二乙基苯胺与氯乙基丙基醚为原料,合成了2,6-二乙基苯胺基乙基丙基醚,对反应条件进行优化,确定了最佳工艺条件为:反应时间10h,反应温度170℃,原料配比n(2,6-二乙基苯胺):n(氯乙基丙基醚)=3:1,碱浓度为40%。在此条件下反应,摩尔收率可达到85.6%。 相似文献
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采用浸渍法制备Cu-Co-Ru-Mg-Cr/Al2O3催化剂,用于2-乙基己醇氨化制2-乙基己胺反应。研究了催化剂中锕、钴加入量及反应压力、温度、空速、氨与2-乙基己醇摩尔比等对氨化反应的影响。在适宜的催化剂组成及操作条件下,2-乙基己醇单程转化率达到72%,2-乙基己胺选择性达到95%。 相似文献
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《精细与专用化学品》1995,(4)
三乙基铝具有极活泼的化学性质,与烯烃反应可得烯烃二聚体及各种α-烯烃、高碳醇和其它化学中间体;与某些过渡金属化合物构成烯烃聚合催化剂;此外可作为烷基化剂、还原剂及汽油添加剂等。 工艺技术特点:在三乙基铝存在下,铝粉直接与氢气、乙烯反应制取三乙基铝。反应分二步,第一步为氢化反应,第二步为乙基化反应。 相似文献
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2-甲基-6-乙基-N-丁氧甲基-N-氯乙酰基苯胺的合成 总被引:2,自引:0,他引:2
以2 甲基 6 乙基苯胺、甲醛、氯乙酰氯和正丁醇等为主要原料,以一种经济环保的工艺路线合成了杀菌剂2 甲基 6 乙基 N 丁氧甲基 N 氯乙酰基苯胺。考察了反应条件对反应结果的影响,获得了较佳的反应条件:烯胺化反应中n(甲醛)/n(2 甲基 6 乙基苯胺)=1 5,反应温度70~75℃,反应时间2h;酰化反应中n(氯乙酰氯)/n(2 甲基 6 乙基苯胺)=1 15,反应温度30~35℃,反应时间1 0h;醚化反应中n(丁醇)/n(2 甲基 6 乙基苯胺)=5 5,反应温度50℃,反应时间5h。在较佳反应条件下,产品质量分数和收率分别达到93%和90%。 相似文献
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以乙二胺和环氧乙烷为原料,在具有特殊微结构的连续流微反应器内发生乙氧基化反应合成羟乙基乙二胺。考察了原料物质的量比、乙二胺含水量、反应温度、停留时间等对反应的影响。确定了最佳工艺条件为:n(乙二胺) : n(环氧乙烷) = 3:1、乙二胺含水量控制在5%(质量分数)以内、反应温度为80 ℃、停留时间为60 s。在此条件下,环氧乙烷转化率接近100%,羟乙基乙二胺的选择性为87.4%,二羟乙基乙二胺的选择性为9.2%。间歇釜式反应工艺在相同物料比和反应温度条件下,羟乙基乙二胺的选择性为83.5%,二羟乙基乙二胺的选择性为15.9%,与之相比,连续流微反应器能有效提高羟乙基乙二胺的选择性,降低副反应的发生,同时大大缩短了反应时间,提高了反应效率。 相似文献
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碳酸铵不稳定,易分解。采用胶囊化技术把碳酸铵包裹起来,不但能使碳酸铵稳定,而且,作为潜伏碱在胶合板和复合板材的制作过程中具有广阔的应用前景。本课题对碳酸铵胶囊的制备方法和作为潜伏碱的适用温度进行了研究,收到良好的效果。 相似文献
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Three different zeolitic catalytic systems (13X, 5A and Ammonium Y) were tested for their dielectric properties, surface area and pore-size distribution. The 13X catalyst conductance is higher than other catalysts. The activation energies for 13X, 5A and Ammonium Y are 100, 80, and 50 kJ/mole respectively. The capacitances of 13X catalyst increase with increasing temperature causing a complex behaviour at higher temperatures and frequencies while the capacitances of 5A catalyst are usually less than 10 pF and those of Ammonium Y catalyst are erratic at low temperature. The 13X catalyst is the most suitable catalyst for its dielectric properties and proves to have a good potential to be heated by a RF dielectric reactor. The BET surface area in m2/g are 524 ± 2, 353 ± 1 and 684 ± 3 while the average pore diameters (in ) by the BET technique are 33, 22, 26 and the micropore volumes in cm3/g are 0.187, 0.125 and 0.220 for 13X, 5A and Ammonium Y respectively. 相似文献
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二硝酰胺铵推进剂的能量特性 总被引:6,自引:1,他引:5
二硝 (基 )酰胺 (基 )铵 (ADN)是一种新型稳定的高能无机氧化剂 ,其单元推进剂的比冲为 2 0 0 3.2 Ns/kg,燃烧温度为 2 10 0 K,用ADN取代丁羟复合固体推进剂中的高氯酸铵 (AP) ,比冲可提高 10 4.5 Ns/kg,与 GAP组成的无烟推进剂比冲可达 2 6 0 7Ns/kg,由GAP/ADN/RDX组成的无烟推进剂 ,最高比冲为 2 6 30 Ns/kg. 相似文献
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DMDAAC/AA/AS聚合物的合成及性能 总被引:2,自引:0,他引:2
采用二烯丙基二甲基氯化铵、丙烯酸、烯丙基磺酸钠为原料,以水为溶剂,用氧化一还原体系引发,合成了一种两性离子型共聚物钻井液降粘剂,初步评价了共聚物的泥浆性能,结果表明,DMDAAC/AA/AS共聚物热稳定好,抑制性、降粘和抗温抗盐能力强。 相似文献
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Chunxu Lu 《Propellants, Explosives, Pyrotechnics》1999,24(1):27-29
In this paper, status of powder industrial explosives in China is described. On the basis of scientific research of China Institute of Industrial Explosive Materials (China IIEM) non-TNT or oligo-TNT Ammonium Nitrate explosive, especially rock expanded Ammonium Nitrate explosive, is emphatically discussed and several points of view about further development of powder industrial explosives in our country are stated. 相似文献
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提出用钼酸铵分光光度法测定循环冷却水中的磷酸盐含量,严格控制好硫酸,各试剂的加入量,以及显色时间.相对于用钼酸铵目视比色法,更省时间,且测定范围更宽. 相似文献
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W. Selig 《Propellants, Explosives, Pyrotechnics》1981,6(4):96-98
Ammonium dinitrotriazole has been assayed by nonaqueous titration as an acid in dimethylsulfoxide versus tetrabutylammonium hydroxide. It can also be assayed by nonaqueous titration as a base in glacial acetic acid versus perchloric acid in glacial acetic acid. In mixtures with ammonium nitrate, ammonium dinitrotriazole can be determined by potentiometric titration in aqueous solution versus cetylpyridinium chloride. 相似文献
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Ammonium nitrate (AN)‐based composite propellants have attracted much attention, primarily because of the clean burning nature of AN as an oxidizer. However, such propellants have some disadvantages such as poor ignition and low burning rate. Ammonium dichromate (ADC) is used as a burning catalyst for AN‐based propellants; however, the effect of ADC on the burning characteristics has yet to be sufficiently delineated. The burning characteristics of AN/ADC propellants prepared with various contents of AN and ADC have been investigated in this study. The theoretical performance of an AN‐based propellant is improved by the addition of ADC. The increase in the burning rate is enhanced and the pressure deflagration limit (PDL) becomes lower with increasing amount of ADC added. The increasing ratio of the burning rate with respect to the amount of ADC is independent of the AN content and the combustion pressure. The optimal amount of ADC for improving the burning characteristics has been determined. 相似文献