Manufacturing method of triethylene glycol monobutyl ether
I. Introduction
Triethylene glycol monobutyl ether (TGBE) is an important raw material for the production of chemicals, which is widely used in the fields of coatings, inks, detergents, printing and dyeing auxiliaries and so on. This article will introduce the manufacturing method of triethylene glycol monobutyl ether in detail.
II. Raw materials and equipment
1. Raw materials: triethylene glycol, n-butanol, catalyst (sulfuric acid or hydrochloric acid).
2. Equipment: reaction kettle, condenser, water separator, stirrer, storage tank, pump, etc.
3. Manufacturing steps
1. Feeding: add the measured amount of triethylene glycol and n-butanol into the reaction kettle, and add the appropriate amount of catalyst at the same time.
2. Heating reaction: turn on the stirrer and heat the reaction kettle to raise the temperature of the material to the set value and keep the reaction at constant temperature.
3. Dewatering: Separate the water generated from the reaction through a water separator and discharge it periodically.
4. Post-treatment: After the reaction is finished, cool the material to room temperature, neutralize the catalyst with alkali, and then carry out distillation to separate the unreacted triethylene glycol and n-butanol to get the crude triethylene glycol monobutyl ether.
5. Refining: carry out distillation of the crude product to get the product of triethylene glycol monobutyl ether with higher purity.
4. Precautions
1. Strictly control the reaction temperature to avoid the occurrence of side reactions caused by too high temperature.
2. Discharge the generated water regularly to prevent too much water from affecting the reaction.
3. When neutralizing the catalyst, control the dosage of lye to avoid excessive amount leading to excessive alkalinity of the product.
4. During the distillation process, make sure the equipment is well sealed to prevent product volatilization and loss.
V. Quality control and inspection
1. Conduct quality inspection on raw materials to ensure compliance with relevant standards.
2. During the manufacturing process, sample and analyze the reaction materials regularly to monitor the progress of reaction and product quality.
3. Conduct quality inspection on the final products, including purity, color, moisture, acidity and other indicators, to ensure that the products meet the relevant standards and customer requirements.
6. Waste treatment and environmental protection measures
1. Classify and treat the waste generated in the production process, recycle the waste that can be recycled, and safely treat the waste that can't be recycled.
2. Strengthen the environmental protection management of the production site, reduce the occurrence of the phenomena of running, bubbling, dripping and leaking, and reduce the impact of production on the environment.
3. Optimize the production process, improve the utilization rate of raw materials and reduce the generation of waste.
VII. Safe production and protection measures
1. Strictly implement safe production operation regulations and ensure that employees are familiar with and master the safety operation regulations.
2. Carry out regular inspection and maintenance of production equipment to ensure normal operation and prevent equipment failure from affecting production safety.
3. Provide necessary labor protection supplies, such as protective gloves, protective glasses, etc., to ensure the safety of employees in the production process.
4. Strengthen on-site safety management, prohibit open-flame items such as fireworks from entering the production site to prevent fire accidents.
VIII. Conclusion
The manufacturing method of triethylene glycol monobutyl ether involves a number of links and precautions, and it is necessary to strictly control the reaction conditions, the quality of raw materials, product quality and other aspects to ensure that the production process is carried out smoothly and the product quality is stable. At the same time, waste treatment and environmental protection measures are strengthened to ensure production safety and improve the economic and social benefits of the enterprise.
