Polyethylene preparation method, initiator injection system, and polyethylene reaction system

A technology of injection system and reaction system, which is applied in the field of preparation of polyethylene and its copolymers, can solve problems such as reactor fouling, and achieve the effects of accelerating the speed of boosting, alleviating easy fouling, and shortening the time

Active Publication Date: 2015-12-09
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a preparation method of polyethylene, an initiator injection system and a polyethylene reaction system, so as to solve the problem of fouling of the reactor in the preparation process of polyethylene in the prior art

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  • Polyethylene preparation method, initiator injection system, and polyethylene reaction system
  • Polyethylene preparation method, initiator injection system, and polyethylene reaction system

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[0034] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0036] For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial p...

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Abstract

The invention provides a polyethylene preparation method, an initiator injection system, and a polyethylene reaction system. The polyethylene preparation method comprises following steps: a first circulating gas is delivered into a pressurizer for pressurizing; a first mixed gas is delivered into a first compressor for pressurizing, wherein the first mixed gas comprises the first circulating gas processed via the pressurizer and ethylene; a second mixed gas is delivered into a second compressor for pressurizing, wherein the second mixed gas comprises the first mixed gas processed via the first compressor and a second circulating gas, the pressure of the second circulating gas is larger than that of the first circulating gas, and pressurizing rate of the second compressor is controlled to be 11 to 13MPa/min; the second mixed gas delivered through the second compressor is delivered into a polymerization unit so as to obtain a reaction product; and the reaction product is delivered through a high pressure circulating gas unit, a lower circulating gas unit, and a extruding granulation unit successively so as to obtain polyethylene and a polyethylene copolymer. The polyethylene preparation method is capable of avoiding a problem in polyethylene preparation that scaling of a reactor in a reaction zone is easily caused.

Description

technical field [0001] The invention relates to the technical field of preparation of polyethylene and its copolymers, in particular to a preparation method of polyethylene, an initiator injection system and a polyethylene reaction system. Background technique [0002] Low-density polyethylene (LDPE) and its copolymers are irreplaceable in the fields of films, coatings, wire and cable materials, etc. With the rapid growth of the global economy, a large number of LDPE plants will be built in succession to meet the market demand for low-density polyethylene and its copolymer demand. Therefore, it is still necessary to further optimize and upgrade its production process, increase device output, improve product quality, and reduce material consumption and energy consumption. [0003] The production of low-density polyethylene and its copolymers by high-pressure method is divided into kettle method and tubular method. A typical LDPE plant mainly includes a compression unit, a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F2/01
Inventor 郭晓东
Owner CHNA ENERGY INVESTMENT CORP LTD
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