Method for producing dimethyl ether by methanol multi-stage gas phase dehydration and catalytic conversion with hydrocarbon
A catalytic conversion, dimethyl ether technology, applied in the dehydration of hydroxyl-containing compounds to prepare ether, ether preparation, chemical recovery, etc.
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Embodiment 1
[0045] The purity of methanol in the methanol raw material is 99.5% by weight, and the hydrocarbon raw material is vacuum gas oil (VGO), and its properties are shown in Table 1. The code name of the catalyst used in this example is MTD-1 (contains 30% by weight of USY zeolite, 5% by weight of ZSM-5 zeolite, and the balance is carrier, all based on the total weight of the catalyst, the same below).
[0046] 80% methanol raw material enters the fluidized bed reactor from the bottom of the riser through pipeline 11, and another part of 20% methanol raw material enters the fluidized bed reactor from the bottom of the mixer through pipeline 41 and other inert gas N 2 Mixed into the fluidized bed reactor to contact with MTD-1 catalyst.
[0047] At a temperature of 280°C, a pressure (gauge pressure) of 0.1MPa, an agent-alcohol ratio of 2.5, and a weight hourly space velocity of 3.0h -1 Reaction under the condition that reactant flow is separated to obtain coke catalyst and product f...
Embodiment 2
[0051] The purity of methanol in the methanol raw material is 99.5% by weight, and the hydrocarbon raw material is VGO, and its properties are shown in Table 1. The catalyst used in this example is still MTD-1.
[0052] Methanol raw material enters the fluidized bed reactor from the bottom of the riser through the pipeline 11, while another part of methanol enters the fluidized bed reactor from the middle of the riser through the pipeline 91, and part of the methanol vapor enters the fluidized bed reactor through the pipeline 41 and the inert gas N 2 The mixture enters the riser from the bottom of the mixer to contact with the MTD-1 catalyst. In the three-stage injection of methanol raw material, 50% of the methanol vapor enters from the bottom of the riser through the pipeline 11, and the methanol vapor entering the fluidized bed reactor from the middle of the riser through the pipeline 91 accounts for 30% of the total feed, and the other 20% methanol vapor from line 41 with...
Embodiment 3
[0057] The purity of methanol in the methanol raw material is 99.5% by weight, and the hydrocarbon raw material is VGO, and its properties are shown in Table 1. The code name of the catalyst used in this example is MTD-1.
[0058] Methanol raw materials are fed in four stages, wherein 20% of the methanol raw materials enter the fluidized bed reactor from the bottom of the riser through the pipeline 11, 10% of the methanol raw materials enter the fluidized bed reactor from the middle of the riser through the pipeline 91, and some 10% methanol feed from line 41 with inert gas N 2 Mixing enters the riser from the bottom of the mixer, while another 60% methanol feed enters the fluidized bed reactor from line 23 to contact with the MTD-1 catalyst.
[0059] At a temperature of 280°C, a pressure (gauge pressure) of 0.1MPa, an agent-alcohol ratio of 2.5, and a weight hourly space velocity of 3.0h -1 Reaction under the condition that reactant flow is separated to obtain coke catalyst...
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Abstract
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