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SAFETY TECHNOLOGY, ACCIDENT PROTECTION

SAFETY TECHNOLOGY, ACCIDENT PROTECTION. An accident in a chemical industry Its causes and further arrangements. Hungary. The accident.

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SAFETY TECHNOLOGY, ACCIDENT PROTECTION

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  1. SAFETY TECHNOLOGY, ACCIDENT PROTECTION An accident in a chemical industry Its causes and further arrangements Hungary

  2. The accident • On 6th October in 1998 at 7 am. a worker, who filled acid at rail-chlorsulphonic acid filling station of the Tisza Region's Chemical Works in Szolnok(TVM),was ordered to fill more acid into the wagon standing at the station. • There could be l or 2 dls of water in the pipe which flew into the chlorsulphonic acid and immediately reacted on it. • The arising vapour stuck into the worker’s face through the filling pipe.

  3. The worker who lost his balance was supported by his colleagues from the filling bridge. • His face was washed with water and rinsed with neutralizing solution then they called the ambulance. It was announced that he had suffered from corrosive effect on his face and forehead. • Fortunately his eyes were sound.

  4. The chlorsulfonic acid and water gives sulphuric acid and hydrochlorid acid. • HO – SO2Cl + H2O = H2SO4 + HCl • This reaction is exoterm but the hydratation of the arising sulphuric acid goes with liberation of great amount of heat ,too but the chlorsulphonic acid itself is a liquid smoking easily in the air. • All these led to the accident that the vapouring acid stuck into the worker's face through the pipe.

  5. Datas of produced chlorsulfonic acid: • Physical characteristics:Density: 1,77 g/cm3 on 18 oC Melting point: 151 oC Freezing point: 1,33 mbar 32 on oCSteam pressure: colourless/yellow liquid fuming on air contact • Packing: rail tank cars, drums made of aluminium or iron with 330 kg Nettocontent (with or without palettes), ISO-Containers

  6. Technical Data:ClSO3H % min. 98,0 H2SO4/and free SO3/ % max. 1,5HCl % max. 0,2 Iron /Fe/ ppm max. 70 • Applications: Production detergents, pharmaceuticals, dyes, pesticides, ion exchange resins, plasticizers, etc.

  7. Datas of the safety sheet • Chemical dangers: • The material dissolves at heating, contacting water and it produces poisonous and corrosive smoke.The material isstrong oxidizing agent and react violently with flammable and reducing materials.   The material is a strong acid, it reacts violently with bases it is corrosive materials.  It reacts violently with alcohols, metalpowders, phosphorus, nitrates and other materials causing danger of fire and explosion.

  8. R sentences referring to hazard • R:14-35-37 • 14 Reacts vidently with water. • 35 Caures serious burn. • 37 Irritates respiratory system.

  9. S sentences referring to precautionary • S: (1/2)-26-45 • 1/2 keeping locked and not available for children • 26 Getting into eyes, if must be washed out with much water and see the doctor. • 45 In the case of accident or indisposition a doctor must be called and if it is possible the label must be shown.

  10. Hazard symbol (label):C Material with causticity Corrosive

  11. Faults, Deficiencies • The required protective clothing wasn't used by the worker at the filling. Terylen clothes, a cap, rubber gloves and gumboots were worn by him but he didn't protect his face.

  12. Faults, Deficiencies • There was some water getting into the chlorsulphonic acid in the filling pipe which caused the detonation-like reaction.The "Z"-shaped pipe with double elbow was on the bridge where perhaps some rainwater could get into it.

  13. What worked properly • The collegues helped at once, washed his face with water, rinsed it with neutralizing solution and called the ambulance.

  14. Further arrangements • The accident must be stated on the monthly education of the worker’s protection (deadline:31.Oct.) • The features of the chlorsulphonic acid and its reaction with water must be stated.

  15. Further arrangements • We must draw attention to the necessity of a more circumspect work and using the prescribed protective clothing and safety equipment must be required and checked. • The filling pipe must be stored in a dry, safe place in vertical position.

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