Synthesis method of special resin for pe100 pipe fittings

A synthetic method and resin technology, which is applied in the field of synthetic resin, can solve the problems of unstable performance, failure to meet domestic market demand, and high price, and achieve the effects of improving thermal oxygen aging performance, increasing mutual binding ability, and high pressure resistance

Active Publication Date: 2020-07-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Good performance has created a huge demand in the polyethylene pipe fitting resin market. At present, the annual demand for polyethylene pipe fitting resin in China is 140,000 tons, and the materials used are almost all occupied by non-special materials. The only special material HE3490IM is produced by Borouge Chemicals ( Borouge) cannot meet the demand of the domestic market due to small import volume, unstable performance and high price, and domestic materials are still blank in this field.

Method used

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  • Synthesis method of special resin for pe100 pipe fittings
  • Synthesis method of special resin for pe100 pipe fittings
  • Synthesis method of special resin for pe100 pipe fittings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Using the Innovene S low-pressure slurry double-loop polyethylene device, after diluting the main catalyst in V3009, inject it into the first reactor R3001 at a concentration of 2.3kg / h together with triethylaluminum, and maintain the concentration of R3001 at 22kg / tPE to maintain the pressure 4.1MPa, reaction temperature 102°C, add hydrogen and ethylene with molar ratio of 0.68:1 to R3001, slurry density 517kg / m 3 , after the reaction, the above product is treated with intermediates to remove hydrogen, and then transported to the second reactor R3002, the pressure of R3002 is 2.8MPa, and the reaction temperature is 82°C. Add R3002 at a molar ratio of 0.0077:1 to control the slurry density to 574g / m 3 The ratio of polymer block is 48.5. After the reaction, the product is desolventized by high-pressure flash evaporation and low-pressure flash evaporation, and the solvent containing hexene enters the solvent recovery system C5001 for recovery. Add the product after dehyd...

Embodiment 2

[0067] Using the Innovene S low-pressure slurry double-loop polyethylene device, after diluting the main catalyst in V3009, inject it into the first reactor R3001 at a concentration of 3.1kg / h together with triethylaluminum, and maintain the concentration of R3001 at 30kg / tPE to maintain the pressure 4.0MPa, reaction temperature 95°C, add hydrogen and ethylene with a molar ratio of 1.25:1 to R3001, slurry density 555kg / m 3 , after the reaction, the above product is treated with intermediates to remove hydrogen, and then transported to the second reactor R3002, the pressure of R3002 is 2.9MPa, and the reaction temperature is 81°C. Add R3002 at a molar ratio of 0.0039:1 to control the slurry density to 536kg / m 3 , The ratio of polymer blocks is 48. After the reaction, the product is desolventized by high-pressure flash evaporation and low-pressure flash evaporation, and the solvent containing hexene enters the solvent recovery system C5001 for recovery. Add the product after de...

Embodiment 3

[0069] Using the Innovene S low-pressure slurry double-loop polyethylene device, after diluting the main catalyst in V3009, inject it into the first reactor R3001 at a concentration of 4.57kg / h together with triethylaluminum, and maintain the concentration of R3001 at 16kg / tPE to maintain the pressure 3.9MPa, reaction temperature 93°C, add hydrogen and ethylene with molar ratio of 0.93:1 to R3001, slurry density 632kg / m 3 , after the reaction, the above product is treated with intermediates to remove hydrogen, and then transported to the second reactor R3002, the pressure of R3002 is 2.7MPa, and the reaction temperature is 87°C. Add R3002 at a molar ratio of 0.0015:1 to control the slurry density to 580kg / m 3 The ratio of polymer block is 50. After the reaction, the product is desolventized by high-pressure flash evaporation and low-pressure flash evaporation, and the solvent containing hexene enters the solvent recovery system C5001 for recovery. Add the product after dehydr...

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Abstract

The invention discloses a method for synthesizing special resin for a PE100 pipe fitting. The method comprises the following steps: (1) diluting a main catalyst, adding the diluted main catalyst intoa first reactor, adding a co-catalyst, adding hydrogen and ethylene to the first reactor, controlling the reaction temperature, pressure and slurry density, and carrying out a reaction; (2) after theproduct of step (1) is treated by an intermediate to remove hydrogen, adding the treated product into a second reactor, adding hexane, ethylene and hydrogen into the second reactor, wherein the molarratio of the hexane to the ethylene is (0.9-2.0):1, and the molar ratio of the hydrogen to the ethylene is (0.0015-0.0087):1, controlling the reaction temperature, pressure and slurry density, controlling the polymerization reaction block ratio to be 48-50, and continuing the reaction; (3) carrying out extruding granulation on the reaction product in the step (2); and (4) cooling the material strip by cooling water, then cutting the cooled material strip into cake-shaped uniform particles, and carrying out homogenized packaging on the particles to obtain the special resin for the PE100 pipe fitting. The special material meets the standard requirements of PE100.

Description

technical field [0001] The invention relates to a method for synthesizing a special resin for PE100 pipe fittings, belonging to the field of synthetic resins. Background technique [0002] In recent years, polyethylene pipes have been more and more widely used in gas transmission, water supply and sewage, agricultural irrigation and other fields. In the polyethylene piping system, about 10% to 15% belong to pipe fittings. The pipe fittings of the polyethylene piping system are mainly divided into hot-melt pipe fittings and electric fusion pipe fittings. These two kinds of pipe fittings are easy to install during construction and maintenance. It is less affected by the external environment and human factors, and plays an important and irreplaceable role. Compared with traditional metal pipe fittings, high-density polyethylene pipe fittings have the advantages of corrosion resistance, less leakage at joints, and strong resistance to external forces. [0003] Enterprises have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K5/134C08K5/526C08K5/098C08F210/16C08F210/14C08F2/06C08F2/01
CPCC08F210/16C08F2800/10C08K5/098C08K5/1345C08K5/526C08L23/0815C08F210/14C08F2500/03C08F2500/07C08F2500/12C08F2/01C08F2/06
Inventor 龚毅斌吴利平吴春霜谌基国朱军刘广宇卜庆生胡斌黄文明
Owner PETROCHINA CO LTD
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