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Preparation method of photodegradable plastic and applicable catalyst thereof

A photodegradation and catalyst technology, applied in chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, organic chemistry, etc., can solve the problems of high melting point of CO/ethylene copolymer, limited application fields, and difficult processing. , to achieve the effect of high polymer quality, widening application fields and good mechanical properties

Pending Publication Date: 2022-07-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Moreover, the CO / ethylene copolymer has a high melting point (about 257 ° C), which is not easy to process and has poor toughness, which limits its entry into some important application fields.

Method used

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  • Preparation method of photodegradable plastic and applicable catalyst thereof
  • Preparation method of photodegradable plastic and applicable catalyst thereof
  • Preparation method of photodegradable plastic and applicable catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Set n(CH 3 C 6 H 5 SO 3 PPh 2 ) / n{Pd(Ac0) 2 }=0.5, and toluenesulfonic acid and nitrobenzene are dissolved in absolute ethanol, sealed in a 250mL autoclave, and the air in the kettle is replaced with CO / ethylene / propylene mixed gas, then pressurized to 5MPa, and rapidly heated to 70 ℃, and finally the gas is supplied to the predetermined pressure, and the pressure drop of the system is maintained to be less than 0.2 MPa during the reaction. After the experiment, quenched to room temperature, pressure relief, suction filtration, cleaning and drying.

Embodiment 2

[0025] Set n(CH 3 C 6 H 5 SO 3 PPh 2 ) / n{Pd(Ac0) 2 }=1, and toluenesulfonic acid and nitrobenzene are dissolved in absolute ethanol, sealed in a 250mL high-pressure reaction kettle, and the air in the kettle is replaced with CO / ethylene / propylene mixed gas, then pressurized to 5MPa, and rapidly heated to 70 ℃, and finally the gas is supplied to the predetermined pressure, and the pressure drop of the system is maintained to be less than 0.2 MPa during the reaction. After the experiment, quenched to room temperature, pressure relief, suction filtration, cleaning and drying.

Embodiment 3

[0027] Set n(CH 3 C 6 H 5 SO 3 PPh 2 ) / n{Pd(Ac0) 2}=2, and toluenesulfonic acid and nitrobenzene are dissolved in absolute ethanol, sealed in a 250mL high-pressure reaction kettle, and the air in the kettle is replaced with CO / ethylene / propylene mixed gas, then pressurized to 5MPa, and quickly heated to 70 ℃, and finally the gas is supplied to the predetermined pressure, and the pressure drop of the system is maintained to be less than 0.2 MPa during the reaction. After the experiment, quenched to room temperature, pressure relief, suction filtration, cleaning and drying.

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PUM

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Abstract

The invention discloses a preparation method of photodegradable plastic and an applicable catalyst thereof. The catalyst comprises palladium acetate, a CH3C6H5SO3PPh2 ligand, toluenesulfonic acid and nitrobenzene. The method comprises the following steps: by taking CO and ethylene as raw materials and absolute ethyl alcohol as a solvent, carrying out polymerization reaction for 1-3 hours under the conditions of 2-5MPa and 50-80 DEG C in the presence of the catalyst. The palladium catalyst provided by the invention has the characteristics of weak oxyphilicity and high polar monomer tolerance, the elimination effect of CH3C6H5SO3PPh2 ligand beta-H is reduced, the copolymerization activity is improved, the insertion rate of the polar monomer is adjustable, the molecular weight of a polymer is improved, the yield of polymerized polyketone is high, and the catalyst is suitable for industrial production. And the third comonomer is added, so that the processability of the degradable plastic is improved, and the degradable plastic with high molecular mass, high toughness and high strength is synthesized.

Description

technical field [0001] The invention relates to a preparation method of a photodegradable plastic, in particular to a preparation method of a synthetic CO / ethylene / propylene ternary copolymer photodegradable material and a suitable catalyst thereof. Background technique [0002] At present, the mass production and application of plastics have brought great convenience to people's lives, but also caused serious "white pollution" because the plastic waste and residual film in the environment are permanent garbage. Generally speaking, in addition to thermal degradability, plastics have poor photodegradability and biodegradability in the natural environment. 14 The results of isotope tracking and investigation of the decomposition of plastics buried in the soil show that the degradation rate of plastics varies with environmental conditions such as precipitation, air permeability, temperature, etc., but in general it is very slow and generally takes one year. A large amount of p...

Claims

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Application Information

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IPC IPC(8): C08G67/02C07F9/46
CPCC08G67/02C07F9/46
Inventor 吴双王世华姜艳峰葛腾杰王玉如牛娜王熺张德英李瑞安彦杰
Owner PETROCHINA CO LTD