Cradle to Consumer
Identity ID
db798b83-9ab9-4428-84e9-ecc1d759fd2d
Materials
Associated ID
14cc5115-f1da-4a5b-8849-c8a321a3af7c
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. Dibutyl phthalate is mainly used as a plasticizer or solvent, etc., in fields such as PVC processing, coatings and inks, adhesives and sealants, fine chemicals, and cellulose products. Dibutyl 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 (triple-effect evaporation water reuse) 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 reaction, neutralization, dealcoholization, filtration and other process steps.
Activity Description
The production activities of this product include esterification reaction, neutralization, dealcoholization, filtration and other processes.
Process Description
Dibutyl phthalate (DBP for short) has the chemical formula C16H22O4 and CAS number 84-74-2. It is a colorless and transparent oily liquid under normal temperature and pressure. It has a slight aromatic odor, medium volatility, freezing point of about -35°C, good low-temperature fluidity, and density of about 1.045g/cm3. Slightly soluble in water, miscible with most organic solvents such as ethanol, ether, toluene, and esters, and has excellent compatibility with polymer materials such as polyvinyl chloride (PVC), nitrocellulose, and cellulose acetate. It is chemically stable and has excellent plasticization and processing fluidity. It is a traditional general-purpose plasticizer. However, due to potential environmental risks, it is restricted in some environmentally sensitive fields. Industrially, it is mainly used in PVC processing (as a classic main plasticizer with low cost), coating and ink industry (as a plasticizer and solvent); it is also used in adhesives and sealants, fine chemicals, and can also be used in nitrocellulose plastics, cellulose acetate products, etc.
Time period
2018
2026
Geography
China,Heilongjiang
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The esterification method is the traditional mainstream technology for the production of dibutyl phthalate (DBP). It is produced through the esterification reaction of phthalic anhydride and n-butanol. It has a simple process and low cost. It accounts for more than 90% of the total DBP production in the country. This data set represents the mainstream technology: using phthalic anhydride and n-butanol as raw materials, DBP 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 butanol to generate dibutyl 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 monobutyl 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. Monobutyl 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 butanol 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 normal pressure heating distillation, the butanol in the alcohol-containing water sent from each process is recovered.