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The rise of the circular economy model, the chemical raw materials industry to explore new paths of sustainable development

Release time:

2025-07-09

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The chemical raw materials industry has long operated on a linear model, where raw materials are extracted, processed into products, and discarded after use—resulting in significant waste and resource depletion. However, the rise of the circular economy is prompting a fundamental shift: instead of treating waste as a byproduct, it is being viewed as a valuable resource to be recycled into new raw materials. This transition is driven by environmental concerns, regulatory pressures, and economic incentives, as recycled materials often offer cost advantages over virgin resources. From chemical recycling of plastics to industrial symbiosis networks, the industry is embracing innovative approaches to create closed-loop systems that benefit both the planet and the bottom line.

Chemical recycling is emerging as a key technology for converting plastic waste into high-quality chemical raw materials. Unlike mechanical recycling, which melts and reshapes plastics (often resulting in downgraded materials), chemical recycling uses heat, solvents, or catalysts to break down polymer chains into their original monomers—the building blocks of plastics.

This process can handle contaminated or mixed plastic waste that is difficult to recycle mechanically, such as multi-layer packaging or colored plastics. For example, polyethylene terephthalate (PET) bottles, when subjected to chemical depolymerization, are broken down into terephthalic acid and ethylene glycol—raw materials that can be reused to produce new PET with the same quality as virgin plastic.

In one application, chemical recycling of post-consumer plastic waste yields monomers used in the production of polyurethanes, a key component in foams and coatings. This reduces reliance on petroleum-derived monomers by 30%, cutting carbon emissions by an estimated 45% compared to traditional production methods.

Scaling up chemical recycling requires advances in catalyst efficiency and process optimization to reduce energy use. Pilot projects have demonstrated that it can process 10,000 tons of plastic waste annually, with plans to expand to 100,000-ton facilities in the coming years.

Industrial symbiosis networks are creating closed-loop systems where waste from one industrial process becomes a raw material for another. In these networks, chemical plants, refineries, and manufacturing facilities exchange byproducts, reducing the need for virgin resources and minimizing waste disposal.

For example, a facility producing industrial solvents generates waste sulfuric acid, which was previously neutralized and disposed of as hazardous waste. Through an industrial symbiosis agreement, this acid is now supplied to a nearby metal processing plant, where it is used to remove rust from steel surfaces—eliminating the need for the metal plant to purchase new acid. In return, the metal plant provides scrap metal to a chemical manufacturer, which uses it as a raw material for producing metal oxides.

Another example is the reuse of carbon dioxide from fertilizer production. Instead of releasing CO₂ into the atmosphere, it is captured and supplied to a beverage company for carbonation or to a greenhouse for enhancing plant growth. This not only reduces emissions but also creates new revenue streams for chemical producers.

These networks require coordination and infrastructure for waste transportation and processing, but they have proven economically viable: participating facilities report 15-30% reductions in raw material costs and waste disposal fees.

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