TH25186C3 - Process and equipment For polymerization in the gas phase - Google Patents

Abstract

DC60 (19/08/42) Process for catalytic polymerization In the gas cycle being carried out in Polymerization area Which is connected between two regions, in which one or more monomers are fed to that region in the presence of the catalyst under the polymerization condition and in which the polymerized Cheap production Taken out of that area The expanding polymer particles flow through the first polymerization area under fast fluidization conditions, leaving the first area. And enters the second polymerization area Through which it flows In a dense figure under the action of gravity, leaving the second such area And it is brought back to the first polymerization region, so the polymerization flows between the two polymerisation regions. The invention is characterized by specific characteristics in which the constituent gases That is different from the existing area. First polymerization It is introduced into the second polymerization region, and it is avoided that the various gases present in the first polymerization region. Was brought into the area Second polymerization, this process is particularly suitable. For obtaining the mixtures made in the reactor Of olefin polymers With different composition processes for catalytic polymerization In the gas cycle being carried out in Polymerization area Which is connected between two regions, in which one or more monomers are fed to that region in the presence of catalysts under the polymerization condition and which polymers are Cheap production Taken out of that area The expanding polymer particles flow through the area. The first polymerization, under fast fluidization conditions, leaves the first area. And enters the second polymerization area Through which it flows In a dense figure under the action of gravity, leaving the second such area And it is brought back to the first polymerization region, so the polymerization flows between the two polymerisation regions. The invention is characterized by specific characteristics in which the constituent gases That is different from the existing area. First polymerization It is introduced into the second polymerization region, and it is avoided that the various gases present in the first polymerization region. Was brought into the area Second polymerization, this process is particularly suitable. For obtaining the mixtures made in the reactor Of olefin polymers With different elements

Claims (2)

1.Process for catalytic polymerization In the act of gas cycle At the very least Two bound polymerization regions, the process consists of the feeding of one or more monomers. Entering the area of such polymerization in the presence of the catalyst Under conditions of reaction and collection of polymer products. From the said polymerization region, in which, in the process, the expanding polymer particles flow up one of the polymerization regions (risers) under conditions Fluidization Or rapid transportation, out of such a lift And enters another region of polymerization (down conductor) where it descends under the action of gravity, leaving the downward conductor. And it is brought back to the riser, so a circulation of the polymer is established between the riser and the down conductor, the process is further characterized: - The path is provided. Which can prevent all gas mixtures Or some that are in Risers from entering down conductors, and - gas and / or liquid mixtures having elements different from that of the gas mixture. Existing in the riser is brought into the down conductor 2. Process according to claim 1, where the introduction of the down conductor of the gas and / or liquid mixture is The composition of the gas mixture contained in the riser is effective in preventing the mixtures after entering the conductor. 3. Process according to claim 2, where the introduction of the gas mixture and / or Liquids with different elements enter the conductors down Set up net gas flow At the upper limit of the down conductors 4. Process according to claim 2 or 3, where the conduction of gas and / or liquid mixtures with different composition The entry into the down conductor is made through one or more inlet ducts inserted into the down conductor 5. Process according to claim 4, where one or more inlet ducts are placed at a point closer to the upper limit. 6. Process according to claim 1 or 2, where the gas mixture and / or liquid having a different composition than that of the gas mixture in the risers. Was brought into itself in the form of 7. The process of claim 6, where the mixture is wholly or partially liquefied. Some of them 8. Process according to claim 1 or 2, where more than one downward conductor, the gas mixture arrives from the risers, is carpeted over the upper surface of the bed of a dense polymer particle. Shielded to allow access to only some of the conductors down, while in the other down conductors The circulation of the gas mixture is allowed. 9. Process in accordance with claim 8, where the gas and / or liquid mixtures with different constituents among the mixtures are permitted. And differs from the composition of the gas mixture in The risers are also raised. The process follows claim 6, where the gas mixture circulating in the riser consists of different volatile components. And parts of it were pressed and cooled. For partial condensation, a portion of the liquid obtained by this method is passed down the conductor 1 1. Process according to claim 10, where such gas mixture circulates in The riser contains hydrogen 1 2. Process according to claim 10, where such a gas mixture circulates in The risers contain ethylene, propylene and may contain inert alkanes. 1 3. The process of one claim 10-12 where the top of the down conductor is used as a column with Rip To remove the most volatile elements from the liquid that is fed into the conductor, the elements are inflated. 1 4. Equipment for catalytic polymerization in the gas cycle containing The first standing (1), the second (2), the top of the (1) standpoint is connected by the extension (3) with the solids-separator. Gas (4), which is alternately connected to the upper part of the second (2) event, the lower part of the second (2) event, is connected to the lower part of the second (2) event. The first (1) event as mentioned by the extension (5), the solid / gas separator (4) is connected through a recycle pipe (6) to one or more points of return to the extension (5) as follows. Said or enters the said device (1), the device has a pipe (12) for the entry of the catalist into the said (1) device, the polymer removal system (11 ) From such (2) notation, pipe (13) for feeding the monomer, such a device It is further identified where it consists of a pipe (15) for the entry of gas or liquid into the said device (2) 1 5. Equipment according to claim 14, where the pipe (15) for The feeding of gas or liquids into the said (2) equipment is placed in the upper part of the (2) above 1 6. equipment according to claim 13 or 14 consisting of a pipe (18) that Connect the recycle tube (6) to the condenser (19), connected to the device (2) through the hose (15) for gas or liquid feeding. Enter the above (2) equipment and return to the pipe (6) through the pipe (20) for gas recycling 1 7. Equipment according to Proposition 14 or 15 consisting of a pipe (18) connected to the recycling pipe (6). ) To a condenser (19), connected to a separate vessel (22) connected to the reactor (2) through a tube (15) for the entry of gas or liquid into the said device (2) and Return to the pipe (6) through the pipe (20) for recycling 1 gas 8. Equipment according to claim 16 or 17, where the pipe (15) for gas feeding Or the liquid entering the device (2) is attached to the heater (24) 1 9. The device according to claim 14, where the upper part (25) of the reaction (2) at the diameter Larger than the rest of the 2 0. The device according to claim 14, where the exit from the riser (1) is immediately shaped as an interruption 2. 1. The device according to claim 14, where section (3) is connected to the superscript (1) with the separator (4), having a smaller diameter than the riser (1) 2. 2. Equipment according to claim 14, where the superscript (1) and part (3) are accompanied by an acute angle.