Technical Specifications for Safety Production of Hydrogenated Silicone Oil
One. Introduction
Hydrogenated silicone oil is an important organic silicon material, widely used in textile, coating, rubber, cosmetics and other industries. Due to the active Si-H bond in its molecular structure, it may release hydrogen (H₂) when exposed to water or heat, posing safety risks such as combustion and explosion. In order to ensure production safety and prevent accidents, this technical specification is specially formulated.
Two. Production environment and facility safety requirements
2.1 Plant and layout
The production workshop should comply with the Class A fire hazard requirements in the Code for Fire Protection of Building Design (GB 50016) and adopt explosion-proof structure.
The equipment layout should maintain a safe distance to avoid material accumulation and ensure good ventilation.
A hydrogen leak alarm device should be installed in the workshop and linked to the exhaust system.
2.2 Explosion and fire prevention measures
Electrical equipment should comply with the Ex d IIB T4 explosion-proof grade to avoid explosions caused by electric sparks.
Open flames and smoking are strictly prohibited in the production area, and static elimination devices (such as grounding wires and ion fans) should be installed.
Equipped with CO₂ fire extinguishers or dry powder fire extinguishers, and water fire extinguishing is prohibited (to prevent hydrogen explosions).
2.3 Ventilation and gas monitoring
Use a forced ventilation system to ensure that the hydrogen concentration is below the lower explosion limit (LEL 4%).
Install an online hydrogen detector to monitor the ambient H₂ concentration in real time. When the concentration exceeds the limit, it will automatically alarm and start emergency exhaust.
Three. Raw material storage and management
3.1 Storage of hydrogenated silicone oil raw materials
Hydrogenated silicone oil and intermediates (such as hydrogenated chlorosilane) should be stored in a cool, dry, ventilated dedicated warehouse, away from direct sunlight.
Storage containers must be sealed to prevent moisture absorption and hydrogen release.
3.2 Hydrogen management
Hydrogen cylinders should be fixed upright, away from heat sources, and use anti-flashback devices.
Hydrogen pipelines should be made of stainless steel and regularly tested for air tightness.
Four. Production process safety control
4.1 Reaction condition control
The reaction temperature should be strictly controlled below 80°C to avoid violent heat release leading to loss of control.
The hydrogenation reaction should be carried out under nitrogen protection to prevent air from mixing into the explosive mixture.
4.2 Equipment safety requirements
Reactors, condensers and other equipment should be pressure-resistant and corrosion-resistant, and non-destructive testing (such as ultrasonic testing) should be performed regularly.
Pipes and valves should be sealed with PTFE to prevent hydrogen leakage.
Five. Operator safety protection
5.1 Personal protective equipment (PPE)
Operators must wear anti-static clothing, chemical protective gloves, goggles, and self-contained breathing apparatus (SCBA) when necessary.
When entering a high-concentration hydrogen area, a portable hydrogen detector should be used.
5.2 Safety operating procedures
Check the tightness of the equipment before operation, and only add materials after confirming that there is no leakage.
Single-person operation is prohibited, and more than two people must work together and keep communication open.
In case of abnormality (such as sudden temperature rise, abnormal pressure), stop the reaction immediately and start the emergency plan.
Six. Emergency treatment measures
6.1 Emergency treatment of hydrogen leakage
Small leakage: Use inert gas (nitrogen) to purge to avoid the formation of explosive mixture.
Large leakage: Immediately cut off the power supply, evacuate personnel, and use explosion-proof fans for forced exhaust.
6.2 Fire emergency treatment
If hydrogen-containing silicone oil catches fire, use dry powder fire extinguisher or CO2 fire extinguisher to put out the fire. Water is strictly prohibited.
If hydrogen burns, the gas source should be cut off to avoid backfire and explosion.
Seven. Waste disposal and environmental protection requirements
Waste hydrogen-containing silicone oil should be stored in a sealed container and handed over to a qualified hazardous waste treatment unit for disposal.
Waste solvents from cleaning equipment must be recycled and processed, and direct discharge is prohibited.
Eight. Safety management and training
Carry out safety training regularly to ensure that employees have emergency response skills.
Conduct safety drills every quarter to simulate hydrogen leaks, fires and other scenarios.
Establish a safety inspection system and regularly inspect equipment, pipelines, and alarm systems.
Nine. Related regulations and standards
Regulations on the Safety Management of Hazardous Chemicals (State Council Order No. 591)
GB/T 23961-2023 Hydrogenated Silicone Oil
AQ/T 3034-2022 Guidelines for Chemical Process Safety Management
Ten. Conclusion
The production of hydrogenated silicone oil must strictly comply with this specification, and implement safety measures in multiple aspects such as raw material storage, process control, equipment management, personnel protection, and emergency response to ensure safe production and prevent accidents.
