TH29692B - Hydrocarbon separation - Google Patents

Abstract

DC60 (24/05/42) Method for separating propylene from the fluid stream of C3 hydrocarbons. The inlet contains propylene, possibly C4 and/or higher hydrocarbons, and MAPD (methyl acetylene and/or propadiene) The aforementioned input goes to fractional distillation to separate the polypropylene into the uppermost fluid stream. which leaves the top of the fluid flow which leaves the bottom fluid stream containing MAPD and C4 and/or any higher hydrocarbons. This process involves adding a propane-containing fluid to the C3 hydrocarbon inlet fluid stream. Therefore, the lower fluid flow Most of these contain propane in large quantities. This avoids the need to release valuable polypropylene. to maintain the MAPD concentration in this bottom fluid stream at a safe level. For this reason, the polypropylene content of The bottom fluid flow can be kept below 10% by weight. The amount of propane added to the tank This inlet fluid stream is the weight of propane plus propylene and any higher C4 and/or hydrocarbons in the aforementioned lower end fluid stream greater than the total weight of propylene. MAPD in the aforementioned bottom fluid stream Method for separating polypropylene from the fluid stream of C3 inlet hydrocarbons containing propylene, may contain C4 and/or higher hydrocarbons and MAPD (methyl acetylene and/or propadiene). By directing the aforementioned inlet flow to the fractional distillation to separate the propylene into the top fluid stream which leaves the top fluid flow. This leaves the bottom of the fluid flow with MAPD and C4 and/or any higher hydrocarbons. This method is filled with a fluid stream containing propane. to the C3 hydrocarbon inlet fluid stream, so the bottom fluid stream contains most of the propane. to avoid the need to release propylene Most of the valuable lean is released into the bottommost fluid stream to maintain the MAPD concentration in the bottommost fluid stream below 10% by weight. This inlet fluid is the weighted quantity of propane plus propylene and any C4 and/or higher hydrocarbons in the aforementioned bottom fluid stream greater than the total weight of MAPD in the fluid stream. The bottom part of the aforementioned

Claims (4)

1. A process for separating polypropylene from fluid flows. C3 hydrocarbon inlet containing propylene and methyl Acetylene and / or Protadiene and possibly even higher C4 and / or hydrocarbons, the aforementioned process combines with the introduction of the inlet fluid stream, as mentioned above, to the fractional distillation to separate the propane. Leylin went out into the topmost fluid stream. This leaves the lowermost fluid current containing methyl, acetylene and / or propadiene, and C4 and / or higher hydrocarbons. (If there is any type) already mentioned It is unique in that the fluid stream containing propane is added to the inlet fluid stream mentioned above. Where propane is separated as part of the said lowermost fluid stream. And to be able to maintain the polypropylene content of this bottom fluid stream at a volume less than 10% by weight, the amount of propane added to the inlet fluid stream is a weighted quantity. Of propane, propylene and C4 and / or higher hydrocarbons (If there is any type) in the lowermost fluid stream mentioned than Total weight of methyl acetylene And protadine in the lowermost fluid stream mentioned above 2. Process according to claim 1, in which the amount of propane plus C4 and / or any higher hydrocarbon in the feed material to the fractional distillation with a weight ratio of propane. Penn plus any higher C4 and / or hydrocarbons per MAPD in the feed material of the greater-order fraction (formula), where the MAPD content of the lower fluid flows is maintained below X% by weight. And keep the volume The polypropylene of the lower fluid flows is below Y%. 3. Process according to claim 1 or claim 2, where MAPD is recovered from the lowest fluid stream by solvent extraction. 4. Any method of claim 1 to 3 in which the inlet fluid flows is the fluid stream of the C3 hydrocarbon component, which is separated from the product of hydrocarbon extraction by water vapor.