共查询到19条相似文献,搜索用时 78 毫秒
1.
2.
3.
5.
通过对催化剂活性组分的筛选,钯/碳(Pd/C)催化剂对脂肪腈与二甲胺反应制备单烷基二甲基叔胺有良好的选择性。采用浸渍-沉淀法制备出负载型Pd/C催化剂,考察了制备过程中溶液体系的pH值和浸渍时间对Pd/C催化剂性能的影响。结果表明:该溶液体系在pH值7.9和浸渍15 h~18 h的条件下得到的Pd/C催化剂对脂肪腈催化加氢制备单烷基二甲基叔胺有较好的催化性能。 相似文献
6.
以铜镍为主活性组分,以二氧化硅为载体,所制得的催化剂用于脂肪醇一步法生产单烷基二甲基叔胺,该催化剂具有高活性,高选择和稳定性。 相似文献
8.
9.
10.
11.
结合醇一步法叔胺生产实际情况,介绍了生产过程工艺及其对质量的影响因素,品质优越的叔胺生产是以高性能胺化催化剂及有效的工艺控制为保障条件。通过不同品种催化剂、工艺条件(温度、氢气分压等)对胺化反应进程的质量控制进行了讨论,认为胺化反应最终产物粗叔胺中伯/仲胺及残余醇的含量是影响成品质量的关键因素。 相似文献
12.
13.
应用分子氧—醛—催化剂体系合成氧化叔胺的研究 总被引:2,自引:0,他引:2
在催化剂存在下,结合使用分子氧和醛,可使吡啶、N,N-二甲基苯胺和N-甲基吗啉发生氧化反应,生成相应的氧化叔胺,收率分别达到88.9%、53.0%和70.0%,考察了影响反应的若干因素。 相似文献
14.
PA 6 resin was produced in a hydrolytic‐polymeric process in which ε‐caprolactam was polymerized in the presence of water as initiator, isophthalic acid and benzoic acid as chain regulators, by polymerizing caprolactam in the presence of 7.5% by weight of water, 0.2% by weight of isophthalic acid, 0.1% by weight of benzoic acid, each percentage being based on caprolactam. By adding hindered piperidine amine and/or tertiary amine to the polymeric system, the effects of additives on the polymer were studied. The results showed that: the addition of 0.1 ~ 0.2% additives can improve the melt stability of polyamide 6; the addition of 0.2% additives can protect mechanical properties of polyamide 6 fibers after exposure to high temperature; and the addition of 0.05 ~ 0.25% additives can increase the amino end group content of polyamide 6 and thereby increase the dyeability of polyamide fibers. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2489–2493, 2004 相似文献
15.
Elisabeth Gérard Heide Götz Sylvain Pellegrini Yves Castanet André Mortreux 《Applied Catalysis A: General》1998,170(2):63-306
The influence of CO2 on the carbonylation of methanol into methyl formate was investigated with two classes of catalytic systems: MeO− and epoxide–amine combinations. In the absence of CO2, NaOMe is the more active, but its efficiency is rapidly destroyed by CO2. On the other hand, the epoxide–amine system is much less sensitive to the presence of CO2. Different classes of amines and epoxides have been tested. Tertiary alkyl amines and terminal epoxides are the most efficient. Phosphines associated with an epoxide have also been found to be able to catalyse this reaction. On the basis of NMR studies, a plausible mechanism which can also be applied to amines is proposed for the reaction. 相似文献
16.
17.
目前制备单长链烷基二甲基叔胺的主要工艺是由脂肪醇和二甲胺在脱氢 加氢类催化剂的作用下进行胺化反应。研究了加入第三金属元素组分对以Cu和Ni为活性组分、以碳酸钙为载体的催化剂选择性的影响。发现金属元素La和Ba的加入,提高了催化剂的选择性,降低了反应产物中高沸物双十二烷基甲基叔胺的含量。Al的加入却大大降低了催化剂的选择性。 相似文献
18.
脂肪胺氧化物的生产及应用前景 总被引:2,自引:0,他引:2
论述以α-烯烃为原料经氢溴化、胺化及氧化和回收溴等步骤生产氧化胺的工艺过程、设计基础及技术-经济指标;α-烯烃路线生产氧化胺的生产、应用前景。 相似文献
19.
全球气候变化是目前世界面临的严峻问题之一,CO2等温室气体的过量排放是导致全球气候变暖的主要原因。碳捕集、利用和封存(CCUS)是现阶段解决全球气候变暖的必要手段,基于有机胺的化学吸收法因捕集效率高、烟气适应性好,成为目前燃煤燃气电厂捕集CO2的关键技术路径。本文详细介绍了胺法CO2捕集技术的基本原理及胺法CO2捕集技术工艺流程,分析了新型吸收剂的开发、节能技术的优化等降低胺法CO2捕集技术再生能耗和成本的关键手段。结合研究现状以及烟气胺法CO2捕集需求,对其未来的发展趋势进行展望。 相似文献