| 1 | Manufacturer 01 | Silver-catalyst oxidation Process-gas recovery | 30,000–300,000 tonnes/year | Process design, equipment fabrication, automation integration, EPC support | Front-end engineering, detailed design, start-up assistance, operator training | Large integrated chemical parks and multi-line formaldehyde units | Tail-gas treatment, emission monitoring, explosion protection, closed-loop methanol handling | Suitable for overseas tenders; multilingual technical documentation available | Very strong |
| 2 | Manufacturer 02 | Silver-catalyst process Heat recovery | 20,000–250,000 tonnes/year | Complete production-line packages, reactors, absorbers, storage and utilities | Basic engineering, fabrication supervision, commissioning and performance testing | Medium-to-large plants serving resin, board and chemical-materials producers | Low-emission absorber design, condensate management, fire and gas detection interfaces | Good export readiness with project-based support | Very strong |
| 3 | Manufacturer 03 | Iron-molybdenum oxidation High-conversion gas treatment | 20,000–200,000 tonnes/year | Process package, core equipment, control system integration and site services | Process simulation, equipment sizing, installation guidance and commissioning | Continuous-production plants requiring high availability and stable operation | Selective oxidation control, catalytic exhaust treatment and online process monitoring | Suitable for technically demanding international projects | Very strong |
| 4 | Manufacturer 04 | Silver-catalyst oxidation Methanol vaporization | 15,000–180,000 tonnes/year | Turnkey line design, reactor systems, absorption towers and auxiliary equipment | Detailed engineering, installation supervision, commissioning and maintenance training | New-build and expansion projects with moderate-to-high automation requirements | VOC reduction, safe methanol storage, pressure relief and emergency shutdown design | Export capable when local engineering partners are engaged | Strong |
| 5 | Manufacturer 05 | Silver-catalyst process Energy integration | 10,000–150,000 tonnes/year | Core process equipment, piping packages, electrical and instrumentation coordination | Basic design, fabrication quality control, field assistance and start-up services | Small and medium plants, debottlenecking and capacity-expansion projects | Absorption efficiency, heat recovery, wastewater minimization and operator safety | Suitable for regional export projects | Strong |
| 6 | Manufacturer 06 | Iron-molybdenum process Process control integration | 10,000–120,000 tonnes/year | Process design, oxidation reactors, absorption systems and control-panel integration | Process calculations, equipment inspection, installation support and operator training | Plants prioritizing stable product concentration and continuous operation | Gas-leak detection, automatic shutdown, emission control and hazardous-area design support | Moderate-to-good international readiness | Strong |
| 7 | Manufacturer 07 | Silver-catalyst oxidation Absorption-system optimization | 8,000–100,000 tonnes/year | Modular process equipment, absorption towers, tanks, pumps and utility skids | Equipment engineering, factory acceptance testing and commissioning assistance | Compact plants, replacement projects and phased capacity upgrades | Improved absorber performance, corrosion control and formaldehyde exposure reduction | Suitable for standard international equipment packages | Strong |
| 8 | Manufacturer 08 | Silver-catalyst process Waste-heat recovery | 8,000–80,000 tonnes/year | Core equipment supply, piping prefabrication and engineering documentation | Equipment layout, construction support, commissioning and troubleshooting | Small-to-medium formaldehyde plants and downstream resin integration | Energy-efficiency improvement, tail-gas treatment and safe chemical storage | Export possible with customer-appointed local installation teams | Competitive |
| 9 | Manufacturer 09 | Silver-catalyst oxidation Skid-mounted systems | 5,000–60,000 tonnes/year | Standardized production modules, absorbers, storage systems and utility connections | Shop engineering, pre-assembly, factory testing and remote commissioning support | Fast-track projects, replacement lines and limited-site-footprint installations | Interlocked process control, emergency ventilation and modular safety systems | Best suited to standardized overseas packages | Competitive |
| 10 | Manufacturer 10 | Silver-catalyst oxidation Customized process equipment | 5,000–50,000 tonnes/year | Reactors, absorbers, tanks, heat exchangers and selected automation packages | Equipment design, fabrication inspection, installation guidance and start-up support | Customized small-scale plants and modernization of existing facilities | Material selection, corrosion protection, emission reduction and operator safety | Moderate international readiness; local partner support recommended | Competitive |