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[Chemical Knowledge]：PTA storage methods and transport specifications

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PTA (terephthalic acid) is an important organic chemical raw material, widely used in the production of polyester, polyester and other polymer compounds. Due to its special chemical properties, PTA needs to strictly comply with certain safety regulations during storage and transportation. This paper will detail the safe storage and transportation specification of PTA.

1. the physical and chemical properties of PTA

PTA is white crystalline powder, hygroscopic, soluble in water, slightly soluble in ethanol, insoluble in ether, benzene and other organic solvents. The melting point of PTA is 425 ℃, the boiling point is 370 ℃, and the decomposition temperature is above 400 ℃. PTA has strong acidity and can react with alkali metals and alkaline earth metals to generate corresponding salts.

2. PTA safety storage specification

1. Storage facilities requirements
PTA should be stored in a dry, cool, well-ventilated special warehouse, avoid direct sunlight and high temperature environment. The warehouse floor should be flat, non-slip, easy to clean, and equipped with corresponding fire-fighting facilities.
2. Storage container requirements
PTA should use special storage equipment, and the container should have good sealing performance to prevent moisture absorption and impurities from entering. At the same time, the container should have corrosion resistance to cope with the acidic nature of PTA.
3. Storage and stacking requirements
PTA shall be stacked separately according to the variety and specification. The stacking shall be stable and tidy, and the stacking height shall comply with relevant regulations. Different batches of PTA should be stacked separately, and set up obvious identification plate.
4. Storage environment monitoring
The temperature and humidity monitoring device shall be set up in the warehouse to regularly monitor and record the temperature and humidity data in the warehouse. When the temperature and humidity in the warehouse exceed the specified range, measures should be taken in time to adjust.

3. PTA transportation specifications

1. Transportation vehicle requirements
PTA should be transported by a special tank truck, and the vehicle should have good sealing performance to prevent leakage and volatilization. At the same time, the vehicle should have corrosion resistance to cope with the acidic nature of PTA.
2. transportation personnel requirements
transportation personnel should undergo professional training, be familiar with the nature of PTA and transportation safety knowledge, and have corresponding operation skills and safety awareness.
3. Transportation route planning
transportation routes should be reasonably planned to avoid passing through densely populated areas, water source protection areas and other sensitive areas. At the same time, should try to choose the road in good condition, smooth traffic routes.
4. Transportation process monitoring
During transportation, the sealing performance of the tank truck should be checked regularly to ensure that no leakage occurs. At the same time, the temperature, pressure and other parameters during transportation should be monitored to ensure transportation safety.

4. PTA emergency measures

During the storage and transportation of PTA, the following emergency measures should be taken in case of any accident:

1. Personnel evacuation: evacuate nearby personnel immediately, set up a cordon, and prohibit irrelevant personnel from entering the scene of the accident.
2. Cut off the fire source: In case of fire, cut off the fire source immediately and use fire extinguishers, foam extinguishing agents and other fire extinguishing equipment to extinguish the fire.
3. Leakage treatment: If leakage occurs, the leakage source should be closed immediately, and the leakage should be cleaned with adsorption materials to avoid the leakage from spreading.
4. Medical treatment: If any person is injured, he should be sent to hospital for treatment immediately.

In short, PTA, as an important chemical raw material, needs to strictly abide by the corresponding safety regulations during storage and transportation to ensure the safety of personnel and the environment. At the same time, a sound emergency plan and disposal measures should be established to deal with possible accidents.

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