Research on recovery and reuse technology of CPE and acrylate processing AIDS

With the rapid development of the plastics industry, chlorinated polyethylene (CPE) and acrylic processing additives (such as ACR) are important polymer modified materials, and the recycling and reuse technology of their waste has become a key issue for the sustainable development of the industry.

1. CPE material recycling technology

CPE is mainly regenerated by thermodynamic separation and chemical modification. The hot melt recovery method utilizes its thermoplastic characteristics to achieve molten separation of waste by patented equipment, such as a scraper heating device. For example, a scraper mechanism driven by an electric telescopic rod can effectively remove molten waste adhering to the inner wall of the heating cylinder, increasing the recovery rate to more than 85%. CPE molecular chain is decomposed by supercritical fluid technology to achieve impurity dissolution and purity control in the supercritical state of carbon dioxide. Recycled CPE can be reused in low-end fields such as cable sheaths and waterproof coils, but the mechanical properties need to be improved by dynamic vulcanization technology.

2. Acrylic additives regeneration process

The recovery of acrylic processing AIDS is dominated by chemical methods:

1) Alcoholysis reduction: in methanol/ethanol solvent, the ester bond is broken through the nickel-based catalyst, and the monomer recovery rate is 78%-92%. The reaction temperature (120-150℃) and catalyst concentration need to be accurately controlled during the process;

2) Hydrolysis regeneration: in alkaline aqueous solution environment, microwave assisted technology can accelerate the hydrolysis reaction, the product is distilled and purified to obtain acrylic monomer, the purity of up to 98.5%;

3) Closed-loop recovery system: the regenerated monomer is repolymerized to prepare ACR auxiliary agent, and the plasticization rate and melt strength can be adjusted by adjusting the ratio of methyl methacrylate/butyl acrylate.

3.Collaboration between technological innovation and environmental protection

Current technological breakthroughs focus on resource efficiency and environmental friendliness:

The bimetal catalyst system increased the alcoholysis efficiency of acrylate by 40%, and the catalyst was recycled more than 15 times.

Bioenzymolysis technology uses microorganisms to degrade CPE waste, and the decomposition products can be converted into biodiesel raw materials, reducing carbon emissions by 60%.

The intelligent recovery system monitors the reaction parameters in real time through the Internet of Things, reducing energy consumption by 25% and controlling the purity fluctuation to ±1.5%.

4.Industrial application challenges

Despite the maturity of the technology, there are still bottlenecks such as complex raw material composition and high recycling costs (about 30% higher than the original material). In the future, it is necessary to strengthen the performance characterization of modified recycled materials (such as thermal stability analysis through DSC), build cross-industry collaboration networks (integrating waste collection-process-remanufacturing chains), and promote standardized certification systems supported by policies.

To sum up, the recycling technology of CPE and acrylic additives is developing in the direction of high efficiency and green, and through process optimization and industrial collaboration, it is expected to achieve the large-scale application of one million tons of annual processing capacity and promote the circular economy transformation of the plastic processing industry.