Cradle to Consumer
Identity ID
0e066834-a035-48ad-aa6a-c2c8e4f7dd14
Materials
Associated ID
80c7a407-4e16-4c1b-b707-cd0605a1e295
Included activities starts
Included activities ends
Description
This dataset is a market dataset representing the consumption market of the region. The dataset includes the transport of the product from the gate to the consumption end, and the transport service is calculated based on the transport situation of the product in the region. Dioctyl phthalate is a traditional general-purpose plasticizer, widely used in fields such as PVC processing, rubber, coatings and adhesives, and inks, and can also be used in cosmetics, waterproof materials, etc. Dioctyl phthalate is modeled as a pure substance, and when modeling this substance the user needs to add a solvent of their choice in the model; this dataset includes the main raw and auxiliary materials, energy, waste and air emissions of the production process, where the preliminary treatment of wastewater in the utility process and the waste gas treatment process are included within the dataset boundary, and infrastructure such as production equipment manufacturing and plant construction is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activity of this product includes esterification, neutralization, dealcoholization, product press filtration, alcohol recovery and other process steps.
Activity Description
The production activities for this product include esterification, neutralization, dealcoholization, product filter pressing, and alcohol recovery.
Process Description
Dioctyl phthalate (DOP for short), also known as di(2-ethylhexyl) phthalate, chemical formula C24H38O4, CAS number 117-81-7, is a colorless and transparent oily liquid at room temperature and pressure, with a slight ester characteristic odor, low volatility, freezing point of about -55°C, boiling point of about 386°C, and excellent low-temperature fluidity and heat resistance. Slightly soluble in water, easily miscible with most organic solvents such as ethanol, ether, toluene, and mineral oil, and has excellent compatibility with polymer materials such as polyvinyl chloride (PVC), synthetic rubber, and cellulose resins. It has stable chemical properties, good resistance to hydrolysis and aging, and is not prone to decomposition reactions at room temperature. It is the core variety of traditional general-purpose plasticizers. Industrially, it is mainly used in PVC processing (as the main plasticizer) and the rubber industry (as a rubber softener and plasticizer); it is also used in coatings and adhesives (as a plasticizing component), inks (as a plasticizer and solvent), cosmetics (to adjust product texture), and can also be used to prepare cable materials, waterproof materials, etc.
Time period
2018
2026
Geography
China,Sichuan
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Using phthalic anhydride and octanol as raw materials, DOP is produced through esterification, neutralization, dealcoholization, filtration and other processes:
1. Esterification: Under normal pressure, heating and the presence of concentrated sulfuric acid, esterification reaction occurs between phthalic anhydride and octanol to generate dioctyl phthalate. During the reaction process, the water generated by the reaction is removed by heating to ensure the normal progress of the esterification reaction.
2. Neutralization: Add soda ash to neutralize the sulfuric acid and part of the monooctyl phthalate in the feed liquid. In order to prevent the ester from hydrolysis under alkaline conditions, the pH after neutralization is controlled to 6-7. Sulfuric acid is a strong acid and is completely neutralized. Monoctyl phthalate is a weak acid and most of it is dissolved in the ester phase, with about 60-70% neutralized.
3. Dealcoholization and product filtration: remove octanol and water from the ester through vacuum distillation, and the bottom liquid of the kettle is sent to the finished product filter press.
4. Alcohol recovery: Through atmospheric pressure heating distillation, the octanol in the alcohol-containing water sent from each process is recovered.