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    • 80. 发明申请
    • DEHYDRATION OF ALCOHOLS ON ACIDIC CATALYSTS
    • 酒精在酸性催化剂上的脱水
    • US20130217943A1
    • 2013-08-22
    • US13701774
    • 2011-06-20
    • Delphine MinouxCindy AdamNikolai NesterenkoJean-Pierre DathWalter VermeirenSander Van Donk
    • Delphine MinouxCindy AdamNikolai NesterenkoJean-Pierre DathWalter VermeirenSander Van Donk
    • C07C1/24
    • C07C1/24C07C2521/04C07C2521/06C07C2521/12C07C2529/40C07C2529/65C07C2529/82C07C2529/83C07C2529/85Y02P20/52C07C11/04
    • The present invention is a process for the dehydration of an alcohol having at least 2 carbon atoms to make the corresponding olefin, comprising: a) introducing in a reactor a stream (A) comprising at least an alcohol, optionally water, optionally an inert component, b) contacting said stream with an acidic catalyst in said reactor at conditions effective to dehydrate at least a portion of the alcohol to make an olefin, c) recovering from said reactor a stream (B) comprising: the inert component and at least an olefin, water and optionally unconverted alcohol, d) optionally fractionating the stream (B) to recover the unconverted alcohol and recycling said unconverted alcohol to the reactor of step a), e) optionally fractionating the stream (B) to recover the inert component, water and the olefin and optionally recycling said inert component and optionally a part of the water to the reactor of step a), wherein, f) an effective amount of a component capable to neutralize a part of the catalyst active site is introduced in stream (A) or directly in the dehydration reactor and g) optionally the temperature of the dehydration reactor is adjusted to increase the alcohol conversion or the olefin yield or both. In another embodiment at step f) an effective amount of a component capable to increase the selectivity for the desired corresponding olefin is introduced in stream (A) or directly in the dehydration reactor.The component introduced at step f) can be chosen from the group consisting of ammonia, organic ammonium salts, hydrazine, nitriles, amines (including pyridines, pyrrols, pyrrolydones and pyrrolidines), amides, imines, di-imines, imides, cyanates, isocyanates, nitrites and nitroso compounds, aldehydes, ketones, carboxylic esters, and their corresponding thio-compounds (thiols, sulphides, disulfides).
    • 本发明是使具有至少2个碳原子的醇脱水以制备相应的烯烃的方法,其包括:a)在反应器中引入至少包含醇,任选的水,任选的惰性组分的流(A) b)使所述物流与所述反应器中的酸性催化剂接触,在有效使所述醇的至少一部分脱水以制备烯烃的条件下,c)从所述反应器回收流(B),其包含:所述惰性组分和至少一种 烯烃,水和任选的未转化的醇,d)任选地将料流(B)分馏以回收未转化的醇,并将所述未转化的醇再循环到步骤a)的反应器中,e)任选地将料流(B)分馏以回收惰性组分, 水和烯烃,并任选地将所述惰性组分和任选的一部分水再循环到步骤a)的反应器中,其中f)有效量的能够中和一部分Ca 天然气活性位点以流(A)或直接在脱水反应器中引入,并且g)任选地调节脱水反应器的温度以增加醇转化率或烯烃产率或两者。 在步骤f)的另一个实施方案中,有效量的能够增加所需相应烯烃的选择性的组分被引入到流(A)中,或直接在脱水反应器中引入。 在步骤f)引入的组分可以选自氨,有机铵盐,肼,腈,胺(包括吡啶,吡咯,吡咯烷酮和吡咯烷),酰胺,亚胺,二亚胺,酰亚胺,氰酸酯,异氰酸酯 ,亚硝酸盐和亚硝基化合物,醛,酮,羧酸酯及其相应的硫代化合物(硫醇,硫化物,二硫化物)。