Method and apparatus for preparing and supplying catalyst slurry to a polymerisation reactor

A catalyst slurry and polymerization reactor technology, applied to the device for controlling the catalyst feed to the polymerization reactor, controlling the catalyst feed to the polymerization reactor, optimizing the catalyst supply to the polymerization reactor, preparing the catalyst slurry and polymerizing In the field of equipment supplying the device to the polymerization reactor, it can solve the problem that the flow rate of the catalyst cannot be adjusted reliably, and achieve the effect of improving the yield

CN1917949AInactive Publication Date: 2007-02-21TOTAL RES & TECH FELUY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2007-02-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to an apparatus for preparing and supplying catalyst to an ethylene slurry loop polymerisation reactor and to an apparatus for controlling the injection of catalyst slurry in a polymerization reactor wherein polyethylene is prepared. The present invention a Iso relates to a method for optimising catalyst supply to a polymerisation reactor. The diluted catalyst is transferred to the reactor (1) using a membrane pump (5) controllable in function of the concentration of a reactant in said reactor (1).
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Description

technical field

[0001] The present invention relates to catalytic reactions. In a first aspect, the invention relates to an apparatus for preparing a catalyst slurry and supplying a polymerization reactor to a polymerization reactor. The invention also relates to a device for controlling the feed of catalyst to a polymerization reactor. In another aspect, the invention relates to a method for optimizing the supply of catalyst to a polymerization reactor. In another aspect, the invention relates to a method for controlling the feed of catalyst to a polymerization reactor. Background technique

[0002] Polyethylene (PE) is polymerized by ethylene (CH 2 =CH 2 ) monomers and optionally higher 1-alkenes such as 1-butene, 1-hexene, 1-octene or 1-decene. Polyethylene polymers are used in many fields because polyethylene is cheap, safe, stable to most environments, and easy to process. According to the synthesis method, polyethylene can generally be classified into several typ...

Examples

Embodiment

[0158] The invention is illustrated by the following preparation example of an industrial scale double loop reactor. For comparative examples, conventional catalyst feed systems and controls were used. Utilization of the present invention allows the polymerization reactor to operate at higher slurry densities with less variation than conventional catalyst feed control. Smaller standard deviations indicate that the present invention enables improved control of the polymerization process as well as higher product consistency.

[0159] Example