Method and system for preparing aldehyde through alcohol oxidation
A technology for alcohol oxidation and oxidant, which is applied in chemical instruments and methods, carbon-based compound preparation, organic compound preparation, etc. It can solve the problems of many side reactions in the silver catalyst bed, low silver catalyst activity, unstable operation, etc., and achieve The effect of reducing loss, reducing undue loss and prolonging service life
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[0042] According to a preferred embodiment of the present invention, the volume flow ratio of the circulating gas to the residual gas is 10-30:70-90. Adopting optimal conditions is more conducive to improving the regeneration period of the silver catalyst and prolonging the service life of the silver catalyst.
[0043] According to the present invention, preferably, the volume ratio of the filtered alcohol, filtered oxidant, steam and cycle gas is 1:0.25-0.55:0.2-1:1-2, preferably 1:0.36-0.44:0.5 -0.8: 1.2-1.5. Optimum conditions are used to improve the conversion rate of alcohol and the selectivity of aldehyde.
[0044] In the present invention, in order to improve the influence of the reactant on the activity of the silver catalyst and cause catalyst poisoning and deactivation or activity reduction, the alcohol and the oxidant are filtered independently, preferably, the solid impurity content in the filtered alcohol is ≤0.01 by weight %, wherein, solid impurities refer to ...
Embodiment I-1
[0114] It is known that the total amount X of the silver catalyst is 100kg, the total mesh number of the silver catalyst Y∈[10,60], the number of silver catalyst beds Z is 2, the number R of the copper backing mesh is 3, and the copper backing mesh The mesh number W is 2 / 5 / 50 mesh.
[0115] Silver catalyst bed S1 comprises two silver catalyst beds, described silver catalyst bed is arranged in parallel successively from bottom to top, is filled with silver catalyst in the described silver catalyst bed, with the total amount of the silver catalyst of loading in silver catalyst bed as Benchmark, from bottom to top, in the two silver catalyst beds, the loading masses of silver catalysts are 70kg and 30kg respectively, and the mesh numbers of silver catalysts are 10-30 mesh and 40-60 mesh respectively. Three copper backing nets are arranged below the bottom silver catalyst bed of the silver catalyst bed, and the copper backing nets are stacked sequentially from bottom to top, and t...
Embodiment I-2
[0117] It is known that the total amount X of the silver catalyst is 200kg, the total mesh number of the silver catalyst Y∈[10,60], the number of silver catalyst beds Z is 2, the number R of the copper backing mesh is 3, and the copper backing mesh The mesh number W is 2 / 5 / 50 mesh.
[0118] Silver catalyst bed S2 comprises two silver catalyst beds, described silver catalyst bed is arranged in parallel successively from bottom to top, is filled with silver catalyst in the described silver catalyst bed, with the total amount of the silver catalyst of loading in silver catalyst bed as Benchmark, from bottom to top, in the two silver catalyst beds, the loading masses of silver catalysts are 120kg and 80kg respectively, and the mesh numbers of silver catalysts are 10-30 mesh and 40-60 mesh respectively. Three copper backing nets are arranged below the bottom silver catalyst bed of the silver catalyst bed, and the copper backing nets are stacked sequentially from bottom to top, and ...
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