Cradle to Gate
Identity ID
0ed568e7-20e5-4e08-b90e-9f755d27aadd
Materials
Associated ID
8c3af462-ef4d-48db-936f-42cc78d307e8
Included activities starts
Included activities ends
Description
n-Propyl acetate is suitable for solvent systems with requirements for environmental friendliness and low toxicity, and is commonly used as an environmentally friendly solvent, in the synthesis of fragrances and pharmaceuticals, as a nitrocellulose solvent, as well as in paint making, plastics, cosmetics, organic synthesis, electronic device cleaning, etc. n-Propyl acetate is modeled as a pure substance; when modeling this substance, users need to add a solvent of their choice to the model. This dataset includes the main raw and auxiliary materials, energy, waste and atmospheric emissions of the production process, in which the waste gas treatment process is included within the dataset boundary, while infrastructure such as the manufacture of production equipment and plant construction is not included within the dataset boundary; the inventory is formed by merging data from multiple sources; the production activities of this product include raw material conveying and preheating, catalytic esterification reaction, dehydration and rectification separation, condensation, layering treatment and other process steps.
Activity Description
The production activities of this product include raw material transportation and preheating, catalytic esterification reaction, dehydration, distillation and separation, condensation, stratification treatment and other processes.
Process Description
n-Propyl acetate (NPAC) has the chemical formula C5H10O2 and CAS number 109-60-4. At ambient temperature and pressure, it is a colorless, transparent, volatile liquid with a mild fruity odor, a boiling point of approximately 101.6°C, and a density lower than that of water. It is slightly soluble in water and miscible with most organic solvents, including ethanol, diethyl ether, acetone, and toluene. It is chemically stable but can undergo hydrolysis to form acetic acid and n-propanol. It is flammable, and its vapor can form explosive mixtures with air. It is mainly used as an environmentally preferable solvent with strong solvency and a moderate evaporation rate, as a chemical intermediate in the production of fragrances, pharmaceuticals, and plastic additives, and as an extraction solvent in fine-chemical separation and purification. It is also used as a carrier for food flavorings and as a solvent in food-packaging printing inks that meet food-contact requirements, for cleaning electronic components and precision instruments, and in coating thinners, leather finishes, and cosmetics where low toxicity and environmental performance are required.
Time period
2015
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
First, acetic acid and n-propanol are transported in proportion through a delivery pump, preheated by the raw material preheater, then enter the esterification reboiler, and finally enter the esterification kettle. Sulfuric acid is added intermittently and quantitatively to the esterification kettle, catalyzing the esterification after heating to generate n-propyl acetate. The n-propyl acetate, along with excess propanol, acetic acid, and water, enters the esterification tower for dehydration and distillation. Part of the sulfuric acid is brought into the esterification tower together with the water azeotrope. The organic phase is taken out from the top of the tower after azeotroping with water, then cooled by the condenser bank and stratified in a decanter. The organic phase enters the crude ester storage tank for subsequent rectification, and the aqueous phase is sent to wastewater treatment.