Problems in the same process for producing methylethyl using butanol dehydrogenation
Thread Content
In the butanol dehydrogenation method for producing methylethylene, SBA undergoes dehydrogenation within the reactor to yield methylethylene; subsequent cooling further facilitates dehydrogenation. What is generally the water content in the crude methylethylene at this stage? Thank you for the answer.
0.1% – at this point, there is very little water in the MEK. However, there is a relatively high amount of MEK and SBA in hydrogen; it is best to remove SBA and MEK through cryogenic treatment
Go back to floor 3; if the water content is only 0.1%, it should not be necessary to use a drying tower with n-hexane for azeotropic distillation to remove water. But this process exists in industry.
Date Time C4 C6 Dimer DMK SBE TBA MEK SBA H2O Heavy substances 2009-4-1 0:00:00 0.11 0.42 0.02 64.87 34.26 0.26 0.06 2009-4-1 8:00:00 0.01 2.2 69.16 27.81 0.23 0.59 2009-4-1 16:00:00 0.04 2.12 68.86 28.18 0.2 0.59 2009-4-2 0:00:00 0.04 0.27 73.28 26.35 0.02 0.03 2009-4-2 8:00:00 0.05 0.11 72.1 27.17 0.5 0.06 2009-4-2 16:00:00 0.04 0.12 71.88 27.49 0.4 0.06 2009-4-3 0:00:00 0.04 0.16 70.87 28.52 0.03 0.38 2009-4-3 8:00:00 0.03 0.13 65.57 33.79 0.17 2009-4-3 16:00:00 0.08 0.2 68.45 30.63 0.28 0.36 2009-4-4 0:00:00 0.08 0.1 70.12 28.83 0.55 0.32 2009-4-4 8:00:00 0.03 0.1 67.73 31.68 0.26 0.2 2009-4-4 16:00:00 0.04 0.11 69.06 30.28 0.28 0.23 2009-4-5 0:00:00 0.04 0.09 69.79 29.26 0.35 0.46 2009-4-5 8:00:00 0.02 0.04 71.52 27.81 0.22 0.4 2009-4-5 16:00:00 0.01 0.04 69.14 30 0.38 0.43 2009-4-6 0:00:00 0.04 0.04 70.51 29.35 0.03 0.02 2009-4-6 8:00:00 0.05 0.01 0.11 69.78 29.97 0.04 0.04 2009-4-6 16:00:00 0.05 0.02 0.11 69.39 29.94 0.45 0.04 2009-4-7 0:00:00 0.03 0.06 64.76 34.65 0.23 0.26 2009-4-7 8:00:00 0.05 0.08 63.44 36.01 0.34 0.08 2009-4-7 16:00:00 0.04 0.11 63.13 36.09 0.07 0.55 2009-4-8 0:00:00 0.02 0.09 66.46 33.1 0.28 0.06 2009-4-8 8:00:00 0.03 0.09 65.68 33.94 0.05 0.2 2009-4-8 16:00:00 0.03 0.07 66.43 33.13 0.13 0.21 2009-4-9 0:00:00 0.04 0.06 69.53 29.56 0.32 0.49 2009-4-9 8:00:00 0.04 0.05 71.34 27.8 0.25 0.52 2009-4-9 16:00:00 0.04 0.02 71.02 28.68 0.22 0.02 2009-4-10 0:00:00 0.03 0.05 65.38 34.25 0.2 0.09 2009-4-10 8:00:00 0.05 0.05 64.63 34.81 0.43 0.02 2009-4-20 16:00:00 0.04 0.04 63.78 33.1 3.02 0.02 2009-4-21 0:00:00 0.04 0.02 59.03 40.21 0.48 0.22 2009-4-21 8:00:00 0.03 0.05 58.15 41.22 0.23 0.32 2009-4-21 16:00:00 0.04 0.08 64.02 35.47 0.02 0.37 2009-4-22 0:00:00 0.04 0.04 60.03 39.84 0.04 0.01 2009-4-22 8:00:00 0.07 0.11 0.07 59.81 39.12 0.75 0.06 2009-4-22 16:00:00 0.05 0.05 55.67 43.89 0.31 0.02 2009-4-23 0:00:00 0.02 0.05 54.81 44.84 0.03 0.26
OP, how much water do you want?
The required quality standard for both A and B is 99.97%. How can one pass with only 0.1 water? 0.01% is about right. So, hexane was added for azeotropic dehydration.
It seems the original poster is also an academic. I don’t have any operational experience.
Date Time C4 MEK SBA H2O Heavy substances 2009-4-1 0:00:00 0.11 64.87 34.26 0.26 0.06 2009-4-1 8:00:00 0.01 69.16 27.81 0.23 0.59 2009-4-1 16:00:00 0.04 68.86 28.18 0.2 0.59 2009-4-2 0:00:00 0.04 73.28 26.35 0.02 0.03 2009-4-2 8:00:00 0.05 72.1 27.17 0.5 0.06 2009-4-2 16:00:00 0.04 71.88 27.49 0.4 0.06 2009-4-3 0:00:00 0.04 70.87 28.52 0.03 0.38 2009-4-3 8:00:00 0.03 65.57 33.79 0.17 2009-4-3 16:00:00 0.08 68.45 30.63 0.28 0.36 2009-4-4 0:00:00 0.08 70.12 28.83 0.55 0.32 2009-4-4 8:00:00 0.03 67.73 31.68 0.26 0.2 2009-4-4 16:00:00 0.04 69.06 30.28 0.28 0.23 2009-4-5 0:00:00 0.04 69.79 29.26 0.35 0.46 2009-4-5 8:00:00 0.02 71.52 27.81 0.22 0.4 2009-4-5 16:00:00 0.01 69.14 30 0.38 0.43 2009-4-6 0:00:00 0.04 70.51 29.35 0.03 0.02 2009-4-6 8:00:00 0.05 69.78 29.97 0.04 0.04 2009-4-6 16:00:00 0.05 69.39 29.94 0.45 0.04 2009-4-7 0:00:00 0.03 64.76 34.65 0.23 0.26 2009-4-7 8:00:00 0.05 63.44 36.01 0.34 0.08 2009-4-7 16:00:00 0.04 63.13 36.09 0.07 0.55 2009-4-8 0:00:00 0.02 66.46 33.1 0.28 0.06 2009-4-8 8:00:00 0.03 65.68 33.94 0.05 0.2 2009-4-8 16:00:00 0.03 66.43 33.13 0.13 0.21 2009-4-9 0:00:00 0.04 69.53 29.56 0.32 0.49 2009-4-9 8:00:00 0.04 71.34 27.8 0.25 0.52 2009-4-9 16:00:00 0.04 71.02 28.68 0.22 0.02 2009-4-10 0:00:00 0.03 65.38 34.25 0.2 0.09 2009-4-10 8:00:00 0.05 64.63 34.81 0.43 0.02 2009-4-20 16:00:00 0.04 63.78 33.1 3.02 0.02 2009-4-21 0:00:00 0.04 59.03 40.21 0.48 0.22 2009-4-21 8:00:00 0.03 58.15 41.22 0.23 0.32 2009-4-21 16:00:00 0.04 64.02 35.47 0.02 0.37 2009-4-22 0:00:00 0.04 60.03 39.84 0.04 0.01 2009-4-22 8:00:00 0.07 59.81 39.12 0.75 0.06 2009-4-22 16:00:00 0.05 55.67 43.89 0.31 0.02 2009-4-23 0:00:00 0.02 54.81 44.84 0.03 0.26 2009-4-23 8:00:00 0.16 55.55 43.89 0.31 0.02
I’m sorry; I’m not familiar with this yet as I’m new to it. It’s not shameful to not know something. Thank you all. This post was last edited by dushanzi2000 on 2009-4-23 15:05.]
The moisture content of the products manufactured by our company is very low, never exceeding 0.01%; after passing through the drying tower, it is at most 0.005%