TH40956A - Circular fluidized bed process I and ethylene homopolymer And the copolymer produced in this way - Google Patents

Abstract

DC60 (09/03/43) Fluidizing process Continuous steam cycle bed For the preparation of ethylene homopolymer and copolymer with a density from 0.87 to 0.97 g / cm3, where ethylene or its mixtures of ethylene and C3 - C8 alpha-mono. Lefins were (co) polymerized in presence with a chromium catalyst. Supported in the polymerization site of the internal vapor cycle fluidized bed reactor. Under the pressure range from 1 to 100 bar and at the temperature range from 30 degrees Celsius. To 125 degrees Celsius. In the vapor cycle in the bed vibrating the aggregate material Which includes Polymer Particulate The resulting heat of Polymerization reaction Was removed by cooling the gas of the circulating reactor and the resulting (co) polymers were separated from the vapor cycle fluidized bed reactor where the prepared (co) polymers had Specific density d, (co) polymerization process Effected At a certain temperature Which is limited by the upper limit described by the equation I TH = 171 + 6 d '(I) 0.84 - d' and the lower limit described by Equation II TL = 173 + 7.3 d '(II) 0.837 - d. 'Here, the meaning is as follows: TH is the maximum reactive temperature in units. Degrees Celsius. TL is the lowest reactive temperature in units. Degrees Celsius. d 'is the numerical value of the density d of the synthetic polymers (co). Fluidizing process Continuous steam cycle bed For the preparation of ethylene homopolymer and copolymer with a density from 0.87 to 0.97 g / cm3, where ethylene or its mixtures of ethylene and C3 - C8 alpha-mono. Lefins are (co) polymerized in the presence of chromium catalysts. Supported in the polymerization site of the internal vapor cycle fluidized bed reactor. Under the pressure range from 1 to 100 bar and at temperature ranges from 30 to 125 in the vapor cycle in the vibrating bed of the aggregate material. Which includes Polymer Particulate The resulting heat of Polymerization reaction Was removed by cooling the gas of the circulating reactor and the resulting (co) polymers were separated from the vapor cycle fluidized bed reactor where the prepared (co) polymers had Specific density d, (co) polymerization process Effected At a certain temperature Which is limited by the upper limit described by the equation I TH = 171 + 6 d '(I) 0.84 - d' and the lower limit described by Equation II TL = 173 + 7.3 d '(II) 0.837 - d. 'Here, the meaning is as follows: TH is the maximum reactive temperature in C, TL is the lowest reaction temperature in ํ C, d' is the numerical value of the density d of the substance. (Cattle) synthesized polymers

Claims (9)

1.Fluidizing process Continuous gas cycle bed For the preparation of ethylene homopolymer And a copolymer with a density of 0.87 to 0.97 g / cm3, where ethylene or a mixture of ethylene and C3-C8-alpha-monoolefins is (co). Polymerization in the presence of a modified chromium catalyst. Supported in the polymerization site of a fluidized reactor. A gas cycle bed at temperatures from 30 to 125 ํ and pressures from 1 to 100 bar in the gas cycle. A finely divided polymer with a chromium catalyst in it. The resulting heat of Polymerization Is eliminated by cooling the circulating reactor gas and the resulting (co) polymers are released from the gas cycle fluidized bed reactor, where (co) polymers with The specific density d was prepared by performing (co) polymerization at temperature during Which is limited by the upper limit described by the equation I TH = 171 + 6d \ '(I) 0.84 - d \' and the lower limit described by Equation II TN = 175 + 7.3d \ '(II) 0.837. - d \ ', where the variable has the following meaning, TH is the maximum reactive temperature in C, TN is the lowest reactive temperature in C, d \' is the numerical value of the density. d of (co) polymers prepared 2. The process for which the reclaimed claim 1 is used, where the reconstituted chromium catalyst is used, is activated at temperatures between 600 and 800 ํ C. 3. Procedures requested in claim 1 or 2 where the supported chromium catalyst That were used With average hole volumes from 1.0 to 3.0 ml / g. 4. The process for which the claim is made in any of the clauses 1 to 3 where ethylene Was copolymerized with 1-hexene 5. Ethylene Homopolymer Or copolymer Which can be acquired by the process as requested In any of the claims 1 to 4 6.Ethylene Copolymer on Claim 5, with a density from 0.930 to 0.945. 7. Ethylene Copolymer, as requested in claim 5 or 6, with MFR flow rates from 8 to 16 as measured in accordance with ISO 1133. 8. Use of ethylene copolymer as requested in any of the claims 5 to 7 for the production of film. 9. Film produced by using ethylene copolymer as requested in the claim. 8