A method and system for separating tert-butanol and diisobutene
A technology of diisobutene and rich diisobutene, applied in chemical instruments and methods, purification/separation of hydrocarbons, adsorption purification/separation, etc., can solve problems such as high energy consumption and increased equipment investment, and achieve low energy consumption and safety risks Small, low investment effect
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Embodiment 1
[0073] The TBA-DIB azeotrope (from the top of the azeotrope separation tower of the isobutene oligomerization device) and the adsorbent are passed into the suspension bed through the second ejector for adsorption reaction, and the reaction product (the adsorbent that has adsorbed TBA and the adsorbent containing extremely A small amount of TBA-rich DIB feed liquid) enters the first centrifugal separator from the outlet of the suspended bed together for separation. The feed liquid rich in DIB containing a very small amount of TBA is discharged from the upper outlet of the first centrifugal separator, and the adsorbent that has selectively adsorbed TBA is discharged from the lower outlet of the first centrifugal separator. DIB is directly obtained from the upper outlet of the first centrifugal separator, or high-purity DIB is obtained after a small amount of TBA-DIB azeotrope is separated by rectification, and the separated TBA-DIB azeotrope is recycled back to the suspension bed...
Embodiment 2
[0082] Operation process is identical with embodiment 1, and the process flow diagram that adopts is as figure 2 shown. The adsorbent used is polystyrene resin loaded with sulfonic acid groups, polystyrene resin is a copolymer of styrene and divinylbenzene copolymer and metal fiber particles, and the loading capacity of sulfonic acid groups is 3.0mmol / g, the roundness of the adsorbent is 0.1, the average particle diameter is 0.5 mm, the adsorbent particles whose particle size is less than 0.7 times the average particle diameter is less than 4%, the adsorbent particles whose particle size is greater than 1.3 times the average particle diameter is less than 4%, and the adsorbent pore size 500nm, specific surface 5m 2 / g, the true density is 1.5g / ml.
[0083] The mass ratio of TBA to adsorbent in the feed TBA-DIB azeotrope is 1:10, the linear velocity of the azeotrope in the suspended bed is 1.05 times the critical suspension velocity of the adsorbent, and the height-to-diame...
Embodiment 3
[0090] The operation process is the same as in Example 1, the adsorbent used is polystyrene resin loaded with sulfonic acid groups, polystyrene resin is a copolymer of styrene and divinylbenzene copolymer and glass fiber particles, the sulfonic acid group The loading capacity of the cluster is 4.0mmol / g, the roundness of the adsorbent is 0.08, the average particle size is 0.8mm, the particle size is less than 0.7 times the average particle size of the adsorbent particles is less than 3%, the particle size is larger than 1.3 times the average particle size of the adsorbent The particles are less than 3%, the pore size of the adsorbent is 300nm, and the specific surface area is 20m 2 / g, the true density is 1.2g / ml.
[0091] The mass ratio of TBA to adsorbent in the feed TBA-DIB azeotrope is 1:5, the linear velocity of the azeotrope in the suspended bed is twice the critical suspension velocity of the adsorbent, and the height-to-diameter ratio of the suspended bed is 10:1 , At...
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