摘要:
Process for the continuous preparation of an amine by reaction of a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines at a temperature in the range from 60 to 300° C. in the presence of a catalyst comprising copper oxide and aluminum oxide, wherein the reaction takes place in the gas phase and the catalytically active composition of the catalyst before reduction with hydrogen comprisesfrom 20 to 75% by weight of aluminum oxide (Al2O3),from 20 to 75% by weight of oxygen-comprising compounds of copper, calculated as CuO,from 0 to 2% by weight of oxygen-comprising compounds of sodium, calculated as Na2O, andless than 5% by weight of oxygen-comprising compounds of nickel, calculated as NiO, and the shaped catalyst body has a pellet shape having a diameter in the range from 1 to 4 mm and a height in the range from 1 to 4 mm.
摘要翻译:通过伯醇或仲醇,醛和/或酮与氢和选自氨,伯胺和仲胺的氮化合物在60至300℃的温度下反应连续制备胺的方法 在包含氧化铜和氧化铝的催化剂存在下,其中反应在气相中进行,催化剂在用氢还原前的催化活性组合物包含20至75重量%的氧化铝(Al 2 O 3 ),20至75重量%的以氧化铜计的含氧化合物的铜(以CuO计)为0至2重量%的含氧化合物的钠(以Na 2 O计)和小于5重量% 包括以NiO计算的镍化合物,并且成型催化剂体具有直径在1至4mm范围内且高度在1至4mm范围内的颗粒形状。
摘要:
Processes comprising: (a) enantioselectively hydrogenating a staffing material comprising a component selected from geraniol, nerol and mixtures thereof to form optically active citronellol; (b) converting the optically active citronellol to optically active citronellal; (c) cyclizing the optically active citronellal to form a mixture comprising optically active isopulegol; and (d) subjecting the mixture to further processing comprising: (i) separating the optically active isopulegol from the mixture and hydrogenating the separated optically active isopulegol to form optically active menthol; or (ii) hydrogenating the optically active isopulegol in the mixture to form optically active menthol and separating the optically active menthol from the mixture.
摘要:
The disclosure relates to a process for preparing butadiene. The process involves nonoxidatively catalytically dehydrogenating butane to obtain a product gas stream containing butane, 1-butene, 2-butene, butadiene, hydrogen and secondary constituents. The 1-butene and 2-butene of the product gas stream is then oxidatively dehydrogenated to give a second gas stream containing butane,2-butene, butadiene, hydrogen, steam and secondary constituents. Next, the butane,2-butene and butadiene are separated from the second gas stream and the butane and 2-butene are then separated from the butadiene product. The butane and 2-butene are then recycled into the nonoxidative catalytic dehydrogenating zone.
摘要:
The present invention relates to a process for preparing optically active aldehydes or ketones which have from 3 to 25 carbon atoms and at least one racemizable stereocenter by catalytic dehydrogenation of the corresponding optically active primary or secondary alcohols in the gas phase in the presence of a catalyst.
摘要:
The present invention relates to a process for preparing optically active aldehydes or ketones which have from 3 to 25 carbon atoms and at least one racemizable stereocenter by catalytic dehydrogenation of the corresponding optically active primary or secondary alcohols in the gas phase in the presence of a catalyst.
摘要:
The invention relates to a process for preparing butadiene from n-butane having the steps of A) providing a feed gas stream a comprising n-butane; B) feeding the feed gas stream a comprising n-butane into at least one first dehydrogenation zone and nonoxidatively catalytically dehydrogenating n-butane to obtain a product gas stream b comprising n-butane, 1-butene, 2-butene, butadiene, hydrogen, low-boiling secondary constituents and in some cases steam; C) feeding the product gas stream b of the nonoxidative catalytic dehydrogenation and an oxygenous gas into at least one second dehydrogenation zone and oxidatively dehydrogenating 1-butene and 2-butene to obtain a product gas stream c comprising n-butane, 2-butene, butadiene, hydrogen, low-boiling secondary constituents and steam, said product gas stream c having a higher content of butadiene than the product gas stream b; D) removing hydrogen, the low-boiling secondary constituents and steam to obtain a C4 product gas stream d substantially consisting of n-butane, 2-butene and butadiene; E) feeding the C4 product gas stream d into a distillation zone and removing a butadiene/butane mixture as the product of value stream e1, to leave a stream e2 consisting substantially of n-butane and 2-butene; F) recycling the stream e2 into the first dehydrogenation zone.
摘要翻译:本发明涉及一种从正丁烷制备丁二烯的方法,该方法具有以下步骤:A)提供包含正丁烷的进料气流a; B)将包含正丁烷的进料气流(a)进料到至少一个第一脱氢区和非氧化催化脱氢的正丁烷中,以获得包含正丁烷,1-丁烯,2-丁烯,丁二烯,氢, 低沸点次生成分,有时还有蒸汽; C)将非氧化催化脱氢的产物气流b和氧气输送到至少一个第二脱氢区,并使1-丁烯和2-丁烯氧化脱氢得到包含正丁烷,2-丁烯, 丁二烯,氢,低沸点二次成分和蒸汽,所述产物气流c具有比产物气流b更高含量的丁二烯; D)除去氢气,低沸点次级组分和蒸汽,得到基本上由正丁烷,2-丁烯和丁二烯组成的C 4 H 4产物气流d; E)将C 4 H 4产物气流d进料到蒸馏区中并除去作为值流e1的产物的丁二烯/丁烷混合物,以留下基本上由正丁烷和2- 丁烯 F)将流e2再循环到第一脱氢区。
摘要:
The present invention relates to a catalytically active composition comprising as active component Pd and Bi and at least one element selected from the group (a) consisting of Rh, Au, Sb, V, Cr, W, Mn, Fe, Co, Ni, Na, Cs and Ba, or Pd, Rh and Bi and optionally an element selected from the group (a′) consisting of Au, Sb, V, Cr, W, Mn, Fe, Co, Ni, Pt, Cu, Ag, Na, Cs, Mg, Ca and Ba. The present invention further provides a process for dehydrogenating hydrocarbons, preferably oxo-functionalized hydrocarbons such as cyclopentanone, cyclohexanone and isovaleraldehyde, using the catalytically active composition.
摘要:
Process for the continuous preparation of an amine by reaction of a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines at a temperature in the range from 60 to 300° C. in the presence of a catalyst comprising copper oxide and aluminum oxide, wherein the reaction takes place in the gas phase and the catalytically active composition of the catalyst before reduction with hydrogen comprises PS from 20 to 75% by weight of aluminum oxide (Al2O3),from 20 to 75% by weight of oxygen-comprising compounds of copper, calculated as CuO, from 0 to 2% by weight of oxygen-comprising compounds of sodium, calculated as Na2O, and less than 5% by weight of oxygen-comprising compounds of nickel, calculated as NiO, and the shaped catalyst body has a pellet shape having a diameter in the range from 1 to 4 mm and a height in the range from 1 to 4 mm.
摘要翻译:通过伯醇或仲醇,醛和/或酮与氢和选自氨,伯胺和仲胺的氮化合物在60至300℃的温度下反应来连续制备胺的方法 在包含氧化铜和氧化铝的催化剂存在下,其中反应在气相中进行,并且在用氢还原之前催化活性组合物包含20至75重量%的氧化铝(PS) Al 2 O 3),20至75重量%的含氧化合物的铜(以CuO计),0至2重量%的含氧化合物的钠(以Na 2 O计)和小于5重量%的氧 令人惊奇的以NiO计算的镍化合物,成型的催化剂体具有直径在1至4mm范围内且高度在1至4mm范围内的颗粒形状。
摘要:
A method for dehydrogenating primary or secondary alcohols having 1 to 12 carbon atoms to give the corresponding aldehydes or ketones in which the alcohol is brought into contact with a catalytically active composition comprising an active component of the formula PdaBibYcZd, where Y is selected from the group consisting of Co, Rh, Pt, Ag, Au, and Z is selected from the group consisting of Na, Cs, Mg, Ca, Ba, V, Cr, W, Fe, Ni, Cu, Sb where the indices a, b, c and d give the mass ratios of the respective elements to one another, where a=0.1-3, b=0.1-3, c=0-3, d=0-1.
摘要:
The disclosure involves a process for preparing butadiene from n-butane. In the process, n-butane is first dehydrogenated autothermally under nonoxidative conditions to form a gas stream. The gas stream is then oxidatively dehydrogenated to form a second gas stream. From the second gas stream, a third gas stream containing n-butane, 2-butene and butadiene is obtained. From the third gas stream, a butadiene/butaine product stream is obtained and remaining n-butane and 2-butene is recycled into the first dehydrogenation zone.