Preparation method of polyethylene, initiator injection system and polyethylene reaction system

The technology of polyethylene and initiator is applied in the field of preparation of polyethylene and its copolymers, which can solve the problems of reactor scaling and other problems, and achieve the effects of accelerating the pressure increase speed, shortening the time, and alleviating the easy scaling.

Active Publication Date: 2017-11-14
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
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  • Claims
  • Application Information

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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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  • Preparation method of polyethylene, initiator injection system and polyethylene reaction system
  • Preparation method of polyethylene, initiator injection system and polyethylene reaction system

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Embodiment Construction

[0034] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

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

[0036] For ease of description, spatially relative terms can be used here, such as "above", "above", "above the surface", "above", etc., to describe as ...

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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 the preparation of polyethylene and its copolymers, in particular to a method for preparing polyethylene, an initiator injection system and a polyethylene reaction system. Background technique [0002] Low-density polyethylene (LDPE) and its copolymers are in an irreplaceable position in the fields of films, coatings, wire and cable materials, etc. With the rapid growth of the global economy, a large number of LDPE devices will be built to meet the market’s 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 high-pressure method for producing low-density polyethylene and its copolymers is divided into a kettle method and a tubular method. A typical LDPE device mainly includes a compression unit, a...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08F10/02C08F2/01
Inventor郭晓东
OwnerCHNA ENERGY INVESTMENT CORP LTD