共查询到19条相似文献,搜索用时 125 毫秒
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由中国石油吉林石化公司研究院研制成功的低级脂肪醇脱氢胺化合成低级脂肪胺钴催化剂,日前获国家发明专利(专利号:ZL00/05224-1)。 相似文献
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由中国石油吉林石油化工公司研究院研制成功的低级脂肪醇脱氢胺化合成低级脂肪胺钴催化剂,于2004年1月获国家发明专利(专利号:ZL00/05224—1)。 相似文献
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单,双烷基醇醚叔胺的制备 总被引:2,自引:0,他引:2
本文介绍了常压催化胺化法制备脂肪醇聚氧乙烯醚叔胺的工艺路线及催化剂的筛选;并对产品进行了定性分析与定量分析。结果表明,催化剂的选择性高于97%,产率在94%以上。 相似文献
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研究了负载型镍催化剂催化下低级脂肪醇的脱氢胺化。通过研究影响催化剂性能的因素,确定适宜的制备条件,使所开发催化剂的性能达到了同类催化剂的国际先进水平。同时,研究了催化剂在制备和使用过程中,物性指标与性能指标的变化情况。 相似文献
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Bimetallic Cu/Ni colloidal dispersions (the core catalyst) stabilised by a combination of calcium and barium stearates as protective colloids (catalyst C) showed a remarkable catalytic activity-several times higher than that of the core catalyst stabilised by barium stearate only (catalyst A) for the amination reaction of low reactive oxo-alcohols, having steric hindrance by branched alkyls, with dimethylamine to prepare N,N-dimethyl tertiary amines. Application of the catalyst C for the same amination reaction of dodecyl alcohol could be performed at a lower catalyst concentration of even 100 ppm based on copper at 220° C with a tertiary amine yield of 92% in a three hours' reaction. The reaction mixture containing catalyst C formed a gel at room temperature and formed a stable homogeneous solution with acetone as a polar solvent. It is postulated that water-repellency of calcium stearate and further incorporation of barium stearate as a second promoter yields a doubly stabilised structure for the core catalyst resulting in a remarkable increase in catalytic activity. 相似文献
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Animation of dodecyl alcohol and monomethylamine (MMA, di-functional) using Cu/Ni-based colloidal catalyst stabilized by barium stearate, and its kinetic study were performed to effectively synthesize didodecylmethylamine (DDMA). For the initial 3–4 h when MMA/dodecyl alcohol mole ratio was less than 1, the amination reaction proceeded very fast (72 mole-alcohol h-1 mole-Cu at 200 °) by zero-order kinetics to directly produce DDMA (85%), with complete consumption of MMA, without liberation of the intermediate, momomethyldodecylamine (MMDA) at all. Then, immediately after the mole ratio exceeded 1, the amination proceeded very slowly (3.4 mole-alcohol h-1 mole-Cu) by consecutive mechanism (second order) with liberation of MMDA. Aldolization of dodecyl aldehyde, formed by dehydrogenation of dodecyl alcohol, was found to be catalyzed by methylamines. Maintaining the zero-order kinetics by continuous control of MMA/alcohol mole ratio at less than 1 through out the amination is essential to obtain a highest DDMA yield by preventing the unwanted aldolization and transalkylation of MMA leading to various byproducts. Catalytic activity of the colloidal catalyst was sevenfold active than that of corresponding solid ones. Amination of 1,6-hexanediol and dimethylamine, using the colloidal catalyst and liquid paraffin as a solvent, was proceeded by consecutive mechanism to form N,N,N,N-tetramethyl-l,6-hexamethylenediamine with an yield of 80%. 相似文献
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第三组分对Cu-Ni脂肪醇胺化催化剂的影响 总被引:1,自引:1,他引:0
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
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甲醇气相胺化制甲胺的工艺技术 总被引:3,自引:0,他引:3
以A 6型催化剂为基础 ,采用连续进料、绝热固定床反应器合成和五塔分离工艺的甲醇气相胺化制甲胺技术的工艺流程合理 ,能充分利用热能 ;改善了气流分布 ,使催化剂性能得到充分发挥 ;一甲胺、二甲胺、三甲胺的产量可以根据需要自由调节。A 6型催化剂的催化反应性能为二甲胺选择性达 2 7 0 %。 相似文献
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元素量比对Cu-Ni二元脂肪醇胺化催化剂性能的影响 总被引:5,自引:1,他引:4
制备了Cu、Ni元素量比不同的以CaCO3为载体的9个催化剂,进行了各催化剂样品对月桂醇催化胺化的评价实验,用XPS进行催化剂还原后Cu、Ni价态的分析,通过XPS谱峰的计算机拟合得到了催化剂还原后Cu、Ni元素还原程度的定量结果。实验结果表明,催化剂的选择性(主要表现为胺化副产物双长链烷基叔胺的含量)和催化剂中Ni的还原性能密切相关。当催化剂中Ni2+不易还原时,胺化评价产物中双长链烷基叔胺的质量分数小于2 1%,当催化剂中x(Ni0)分别为22 7%、20 4%、14 8%及7 9%时,催化剂胺化评价产物中双长链烷基叔胺的质量分数分别为13.0%、11.7%、10.8%及5.2%。催化剂还原后Ni0的比例越大,则胺化反应产物中双长链烷基甲基叔胺的质量分数越高,催化剂的选择性越差。 相似文献
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A-6型甲胺催化剂的工业应用 总被引:3,自引:0,他引:3
A-6型甲醇胺化制甲胺催化剂,液空速11.7h-1条件下考察,500h,甲醇转化率97.52mol%, 活性稳定, 产物分布几乎不随时间变化。该催化剂已工业运转150天, 转化率98~99mol%,N/C=1.95条件产物粗胺中一、二、三甲胺分别为(wt%)29.24、40.76和30.00. 相似文献