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Olefin polymer, producing method and application thereof

A technology of olefin comonomers and olefins, applied in applications, other household appliances, household appliances, etc., can solve problems such as poor blending of comonomers, failure to obtain approval, etc.

Inactive Publication Date: 2007-11-07
CHEVRON PHILLIPS CHEMICAL CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another drawback of traditional chromium / aluminophosphate catalyst systems is that they do very poorly with certain comonomers such as 1-hexene
As a result, traditional chromium / aluminophosphate catalyst systems have excelled in the production of very high density blow molding resins, but such catalyst systems have not yet gained acceptance for the commercial manufacture of low density copolymers used to make films and tubes

Method used

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  • Olefin polymer, producing method and application thereof
  • Olefin polymer, producing method and application thereof
  • Olefin polymer, producing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Catalyst Activation

[0125] The above-mentioned catalyst was activated by calcining in dry air at 600°C. In a typical activation batch, about 500 lbs of catalyst are charged to a commercial activator consisting of a perforated plate located inside an Inconel cylinder about 20 feet high and 42 inches in diameter. The catalyst was placed on a perforated plate and dry air passed through at a rate of about 0.2 feet per second (ft / sec) to fluidize the bed. The temperature was gradually increased to about 600°C over a period of about 8-10 hours. Once the temperature reached 600°C, the activator was maintained at that temperature, while fluidizing, for about 10 more hours. The activated catalyst is then cooled to about 300°C, at which temperature the activated catalyst is removed from the activator. During the last 2-3 hours of the cooling process, the fluidizing air was replaced with dry nitrogen. Catalyst removed from the activator was kept in nitrogen-blanketed airtigh...

Embodiment 2-19

[0133] Catalyst preparation:

[0134]Several pilot runs were carried out using the catalyst system of the present invention. These examples also adopt the steps of preparing the catalyst in Example 1, only adjusting the amount of phosphoric acid added to the preparation process and changing the P / Al molar ratio in the final catalyst. Other steps are the same. In all cases, catalyst activation was carried out analogously in a fluidized bed at about 600°C under air conditions. 1.5 lbs of catalyst was charged into a 6 inch diameter cylinder with a distribution plate for fluidization. The catalyst was fluidized with dry air during the temperature rise to about 600°C. This process takes about 8 hours, and then the catalyst is fluidized for another 6 hours at about 600°C in dry air. The catalyst was purged with dry nitrogen during cooling and then kept under nitrogen until use.

[0135] polymerization

[0136] In Examples 2-19, ethylene polymers were prepared in a continuous p...

Embodiment 20

[0161] This example illustrates the preparation of various catalyst systems employed in the following examples.

[0162] Chromium / Aluminophosphate Catalyst System

[0163] (Chromium / Aluminophosphate Catalyst Systems)

[0164] The aluminum phosphate catalyst system is prepared from a thick slurry comprising anhydrous aluminum nitrate, monobasic ammonium phosphate and chromium nitrate. A small amount of water is added, usually about the amount of aluminum nitrate, and the temperature is raised to about 40°C (104°F) to dissolve the mixture. The addition amount of aluminum nitrate and monobasic ammonium phosphate is the required amount according to the expected molar ratio of phosphorus to aluminum (P / Al). For example, in order to make the phosphorus-aluminum molar ratio (P / Al) of the final catalyst system 0.2, for each mole of anhydrous aluminum nitrate, 0.2 mole of monobasic ammonium phosphate (or ammonium phosphate monobasic, (ammonium phosphate monobasic)) is correspondingly...

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Abstract

The present invention relates to mono-1-olefin homopolymer and comopolymer and their production process and application.

Description

[0001] This application is a divisional application of the application number 03826022.0, the filing date is February 24, 2003, and the invention title is "Olefin Polymer, Manufacturing Method and Its Application". technical field [0002] The present invention relates to polyolefin compositions, methods of making polyolefin compositions, articles using polyolefin compositions, and methods of making articles using polyolefin compositions. More specifically, the present invention relates to mono-1-olefin homopolymerization and copolymerization compositions, methods of making the compositions, articles employing the compositions, and methods of making articles employing the compositions. Background technique [0003] Various resins are currently used to manufacture many types and forms of tubes. For example, polyethylene resins have long been used in the manufacture of high stiffness pipes used in water, gas, and other fluid transfer applications. In conditions requiring high...

Claims

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Application Information

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IPC IPC(8): C08L23/18C08L23/16B29C47/20B29D23/00B29C48/32
Inventor M·P·麦克丹尼尔E·A·贝纳姆A·R·沃尔夫P·J·德洛里耶P·L·梅亚赫尔W·R·库唐D·C·罗尔夫英S·J·塞科朗
Owner CHEVRON PHILLIPS CHEMICAL CO LP
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