LOADING锐赛克 · ResourceCycle
对苯二甲酸二甲酯 (DMT)
生产厂家
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ResourceCycle deployed an in-house chemical-recycling unit for a central China pharmaceutical group, producing 350 t/y polyester-grade DMT for PBT engineering plastic production, reducing raw material cost by 35%, achieving 100% waste resource utilization and 2,000 t/y CO₂ reduction.
The client is a listed pharmaceutical group in central China with core businesses in API intermediates, medical packaging, and PBT engineering plastics for medical devices. Production generates ~1,500 t/y of PET trim, off-spec medical packaging and bottle-grade PET, conventionally handled as hazardous waste at ¥1,800/ton plus 30+ day processing cycles due to GMP compliance.
In H2 2024, geopolitical pressure pushed PTA international prices from ¥5,400/t to ¥7,200/t, raising the company's PBT raw material cost by 28% and squeezing margins. Concurrently, several brand customers (medical device OEMs) added 'recycled content' to 2027 compliance lists, requiring ISCC PLUS certification.
Given internal demand for both waste PET disposal and DMT / EG feedstock, the executive team approved a small-scale in-house chemical-recycling unit to replace external PTA with internally produced DMT, simultaneously consuming waste PET and establishing closed-loop feedstock with ISCC PLUS certification.
ResourceCycle delivered 350 t/y skid-mounted DMT unit — 480 m² total footprint, 2 × 2 m³ reactor train, modular process skids individually transportable, assembled on site in <2 weeks.
Equipment surfaces in 304 stainless steel + polish, CIP (clean-in-place) ports on critical lines to prevent cross-contamination. Control system integrated with client SCADA.
Waste PET → internal collection → ResourceCycle unit → polyester-grade DMT → direct to downstream PBT polymerization. Zero external purchases, zero external sales in the intermediate.
ISCC PLUS mass-balance certification post-commissioning. DMT also passed pharma GMP audit (microbiological, ICP-MS heavy-metal, GC-MS residual solvent).
10 months from contract signing to production. ¥32M capex, saving ¥9.8M/y external PTA cost + ¥2.8M/y waste disposal cost. Static payback 2.6 years.
May - Jun 2024 (1 month)
5 PET sample types tested, conversion rate + product COA verified
Jul - Aug 2024 (2 months)
50 kg pilot batches, parameters + catalyst formula confirmed
Sep - Dec 2024 (4 months)
Skid-mounted modules built to GMP / ASME standards
Jan - Feb 2025 (2 months)
Field assembly, E&I, 72 h hot run + performance test
Mar 2025 onwards
30 t/month DMT output, all consumed by PBT engineering plastic line
| Metric | Achieved | Comment |
|---|---|---|
| Waste PET processed | 1,200 t/y | 100% closed-loop |
| DMT output | ≥350 t/y | Dual pharma + polyester grade |
| PTA substitution | -100% | PBT line external PTA fully replaced |
| Raw material cost reduction | -35% | In-house DMT cheaper than PTA-EG route |
| Hazardous waste cost saved | ¥2.8M/y | Medical-grade waste internal consumption |
| Waste resource utilization | 100% | Zero external disposal |
| DMT purity | ≥99.9% | Color ≤3 APHA · exceeds polyester grade |
| Annual CO₂ reduction | ~2,000 t | Low energy + reduced PTA transport |
| ISCC PLUS certification | Jun 2025 | Supports brand customer compliance |
| Static payback | 2.6 years | Includes equipment + GMP retrofit |
「Our initial expectation was simply to handle the 1,500 t/y waste PET. In actual production we discovered that PTA substitution and brand customer compliance benefits far exceeded disposal cost savings. ResourceCycle's ISCC PLUS + GMP dual-track system let us complete in 10 months what we originally expected to take 24 months.」
Listed pharmaceutical group
Group CPO · Procurement & Supply Chain
Submit your waste PET source, capacity needs and goals. ResourceCycle replies with feasibility assessment + initial scheme within 24 hours.
