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System and process for producing polyethylene

A technology of polyethylene and ethylene, which is applied in the direction of chemical instruments and methods, bulk chemical production, addition of unsaturated hydrocarbons to hydrocarbons, etc., and can solve problems such as low methane conversion rate and uneconomical

Inactive Publication Date: 2016-05-04
SAUDI BASIC IND CORP SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, methane can be separated from ethylene in the gas phase; however, this separation is an energy-intensive process requiring cryogenic cooling and compression-decompression cycles to achieve the necessary separation conditions of high pressure and low temperature
Furthermore, methane oxidative coupling can have relatively low methane conversion, making the process uneconomical

Method used

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  • System and process for producing polyethylene
  • System and process for producing polyethylene
  • System and process for producing polyethylene

Examples

Experimental program
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Effect test

Embodiment

[0027] For purposes of illustration and not limitation, the reaction that can be performed in the first reactor is as follows: 7 grams (g) of sodium manganese catalyst is loaded into a U-shaped quartz reactor with an internal diameter (I.D.) of 10 millimeters (mm). A methane and oxygen mixture with a 3:1 ratio and a total flow rate of 14 milliliters per second (ml / sec) may be fed from the top of the U-shaped quartz reactor and fed at the bottom of the reactor with a 3:1 ratio and 14 cubic centimeters per second (cc / sec) flow rate of ethane-oxygen mixture. The U-shaped quartz reactor can place an 850°C electric furnace inside, and the products of the reaction can be removed through other outlets of the U-shaped reactor for analysis. Other methane oxidative coupling catalysts such as Sr / La can also be used 2 o 3 , using different reaction conditions such as a catalyst loading of 7 milliliters (ml) and a methane oxygen mixture flow rate of 7 cc / min at 800 °C.

[0028] For purp...

Embodiment approach 1

[0034] Embodiment 1: A method for producing polyethylene from methane comprising: receiving a first feed comprising methane and oxygen; performing a first reaction in the presence of a first oxidation catalyst to produce A first product of alkanes, propane, propylene, carbon monoxide, carbon dioxide and water; a second reaction is carried out in the presence of a second catalyst to produce a second product comprising methane, ethylene, ethane, propane, propylene, carbon dioxide and water; from the first Separate ethane, propane, propylene, carbon dioxide and water from the second product; receive a second feed comprising oxygen and ethane separated from the second product and react simultaneously with the first reaction; conduct a third reaction to produce the a third product of ethylene and vented methane; and returning the vented methane to the first feed;

Embodiment approach 2

[0035] Embodiment 2: The method according to claim 1, wherein the first, second and third reactions are performed in different reaction chambers.

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Abstract

Systems and processes for generating polyethylene are provided. A process includes performing a first reaction with methane and oxygen to produce a first product; performing a second reaction with the first product to produce a second product; separating components from the second product; returning ethane from the second product and performing a reaction simultaneous to the first reaction; performing a third reaction to produce a third product including polyethylene and vented methane; and returning the vented methane to a feed to the first reaction.

Description

technical field [0001] The presently disclosed subject matter relates to systems and methods for the production of polyethylene from methane. Background technique [0002] Polyethylene is an important industrial polymer commonly used in packaging. One method used to produce polyethylene is through the oxidative coupling of methane. In this method, methane can be separated from ethylene in the gas phase; however, this separation is an energy-intensive process requiring cryogenic cooling and compression-decompression cycles to achieve the necessary separation conditions of high pressure and low temperature. Furthermore, methane oxidative coupling can have relatively low methane conversion, making the process uneconomical. [0003] Accordingly, there remains a need in the art for techniques for producing polyethylene that do not require the costly separation of unreacted methane from ethylene. Contents of the invention [0004] The presently disclosed subject matter provid...

Claims

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Application Information

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IPC IPC(8): C07C2/84C07C2/02C08F210/16
CPCC07C2/78C07C5/48Y02P20/52C08F210/16C08F2500/07C07C11/04C07C11/06B01J8/1818B01J19/245C07C2/84C08F10/02
Inventor 阿加丁·马马多夫穆罕默德·萨布里·阿卜杜勒加尼
Owner SAUDI BASIC IND CORP SA