MOL begins Olefin-1 plant restoration

Key highlights
  • Official on-site investigation of the May 22 Olefin-1 explosion is complete and immediate safety risks have been eliminated.
  • Regulatory approvals are in place and a dedicated expert team will start cleaning, erecting scaffolding and conducting technical inspections of equipment, pipelines and structures.
  • Hydrocarbon removal continues while damaged elements are dismantled and procurement of replacement equipment begins; plant restart is estimated to take several months.
  • Injured staff remain hospitalized but are improving; national fuel supply and other petrochemical units are unaffected.

Investigation and safety

The official on-site investigation of the Olefin-1 plant explosion on May 22 is complete; immediate safety risks have been eliminated and regulatory approvals to begin restoration have been granted.

Restoration work plan

A dedicated expert team will start cleaning, erecting scaffolding and performing technical inspections of affected equipment, pipelines, steel and reinforced concrete structures; damaged elements will be dismantled and procurement of replacement equipment initiated.

Hydrocarbons and timeline

Safe removal of hydrocarbons is ongoing; after technical inspection of damaged equipment a more accurate schedule will be established, with preliminary estimates indicating the plant could resume operations after several months of restoration work.

Personnel and operations

Injured colleagues remain hospitalized but are improving; fuel supply in Hungary is not affected and other MOL Petrochemicals units are operating as planned.

Source: MOL Group

chemXplore Weekly

The week’s project milestones and project news from the chemical industry, free every Wednesday.

Free. One email a week. Unsubscribe any time.

Related articles

23 May 2026
MOL opens probe into Olefin-1 incident at Tiszaújváros

Cooperating with authorities; unit draining underway for damage assessment. Two discharged, seven hospitalized (stable). Psychological support provided. Fuel supply unaffected; other units operating.

22 May 2026
MOL Olefin-1 explosion in Tiszaújváros

Explosion during unit restart left one worker dead and nine injured; fire extinguished. Investigation under way. Other complex units keep running; refining and fuel supply unaffected; event insured.

22 May 2026
MOL Petrochemicals explosion in Tiszaújváros — one dead, several injured

Fire at olefin plant is being extinguished; company cooperating with authorities. CEO en route. Company expresses condolences and regards the colleague as part of the corporate group.

22 December 2025
Clariant Denies Competition Law Allegations by MOL Group and Braskem

Clariant received damage claims totaling EUR 950 million related to 2020 competition law infringement but rejects the allegations, citing no market impact.

18 September 2025
MOL Group Converts Plastic Waste into High-Value Products at Tiszaújváros Site

MOL's pilot test in Hungary converts plastic waste into polyethylene and polypropylene, advancing its circular economy strategy with ISCC PLUS certification.