Separating device and process for separating volatile compounds from polymer reaction mixture
A technology of volatile compounds, reaction mixtures, applied in the field of separation devices, capable of solving problems such as not providing solutions to problems
Active Publication Date: 2021-08-31
BOREALIS AG
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Problems solved by technology
However, no solution to the above-mentioned problems is provided
Method used
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Embodiment 1
[0129] In Embodiment 1 of the present invention, there is not only a weight separator, such as figure 2 As shown, the separation device according to the invention has been connected to the outlet of the polymerization reactor. As mentioned above, such separation means include a gravimetric separator combined with a flash separator.
[0130]
[0131] Table 2: the processing conditions of the embodiment of the present invention 1
[0132] Table 2 summarizes the process conditions at the outlet of the polymerization reactor, gravimetric separator and flash separator of the separation device of Example 1 of the present invention. Therefore, the conditions at the outlet of the polymerization reactor and the gravimetric separator were the same as those of Comparative Example 1.
[0133] As can be seen from the results shown in Table 2, the separation device of the present invention was able to completely remove solid polyethylene as well as any liquid phase from a gaseous poly...
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Abstract
The current application is related to a separating device for separating volatile compounds from a polymer reaction mixture comprising a gravimetric separator, having a gravimetric vessel, an inlet for feeding the polymer reaction mixture, a first outlet located in the lower part of the gravimetric vessel for withdrawing a first polymer-rich stream, and a second outlet located in the upper part of the gravimetric vessel for withdrawing a first polymer-lean stream; and a flash separator having a flash vessel, a first inlet for feeding a second polymer-lean stream split from the first polymer-lean stream, a first outlet located at the lower part of the flash vessel for withdrawing a liquid stream, and a second outlet located at the upper part of the flash vessel for withdrawing a gaseous stream, wherein the second outlet of the separator vessel is fluidly connected to the first inlet of the flash vessel. Furthermore, the present application is related to a A process for separating volatile compounds from a reaction mixture comprising a polymer and said volatile compounds, comprising the steps of passing the reaction mixture through the inlet into the gravimetric vessel of the gravimetric separator of a separating device according to the present invention, withdrawing a first polymer-rich stream comprising mainly polymer through the first outlet of the gravimetric vessel, withdrawing a first polymer-lean stream comprising mainly volatile compounds through the second outlet of the gravimetric vessel, passing at least a part of the polymer-lean stream as a second polymer-lean stream through the first inlet into the flash vessel of the flash separator of the separating device according to the present invention, withdrawing a liquid stream through the first outlet of the flash vessel, and withdrawing a gaseous stream through the second outlet of the flash vessel.
Description
technical field [0001] The invention relates to a separation device for separating volatile compounds from polymers. Furthermore, the present invention relates to a method for separating volatile compounds from polymers using said flash separator. In particular, the separation device and method are useful in solution polymerization processes. Background technique [0002] Polyolefins are produced by several different conventional techniques. Typical temperatures range from 50°C to 350°C and pressures range from 30 bar to 3000 bar. Polyolefins are produced at temperatures at which the polymer dissolves in a liquid or in a supercritical mixture of unreacted monomer, unreacted comonomer, and optionally solvent. [0003] A polymerization process includes one or more polymerization reactors. Suitable reactors include unstirred or stirred, spherical, cylindrical and tank-shaped vessels as well as circulation loop reactors and tubular reactors. Such reactors generally include ...
Claims
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IPC IPC(8): B01D1/00B01D3/06B01D17/02
CPCB01D1/00B01D3/06B01D17/0208Y02P20/54B01D1/30B01D17/0214B01D19/0036C08F10/02C08F6/12C08F6/10
Inventor M·A·H·阿里K·阿拉斯塔洛
Owner BOREALIS AG