Cradle to Consumer
Identity ID
56349b87-7832-4bd3-9a8a-eab53482672c
Materials
Associated ID
af0d270c-f0a0-4bac-b31d-d1ccfddaddcc
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 consumer end, and the transport service is calculated according to the transport situation of this product in this region. Dioctyl terephthalate is widely used in fields such as plastics processing, rubber, coatings and adhesives, medical devices and inks. Dioctyl terephthalate is modelled as a pure substance; when modelling this substance the user needs to add a solvent of their choice in the model; the dataset contains the main raw and auxiliary materials, energy, waste and atmospheric emissions of the production process, and infrastructure such as the manufacture of production equipment and the construction of plant buildings is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activities of this product include esterification, de-alcoholisation, neutralisation, stripping, dehydration and filtration.
Activity Description
The production activities of this product include esterification, dealcoholization, neutralization, stripping, dehydration, filtration and other processes.
Process Description
Dioctyl terephthalate (DOTP for short), also known as di(2-ethylhexyl) terephthalate, has chemical formula C24H46O4 and CAS number 6422-86-2. It is usually a colorless and transparent oily liquid, odorless and tasteless, with low volatility and good fluidity. It is insoluble in water, easily soluble in organic solvents such as ethanol, ether, toluene, etc., and has excellent compatibility with polymer materials such as polyvinyl chloride (PVC) and polyurethane. It has stable chemical properties, outstanding hydrolysis resistance, heat resistance, and aging resistance. It still maintains good flexibility at low temperatures and does not contain harmful substances such as phthalates. It is an environmentally friendly plasticizer. Industrially, it is mainly used in the field of plastic processing (as the main plasticizer of PVC products to improve product toughness and durability) and the rubber industry (as a rubber softener to improve processing fluidity and finished product elasticity); it is also used in coatings and adhesives (as a plasticizing component), medical equipment, and can also be used in inks, food contact materials and other fields. It is especially suitable for manufacturing products that require environmental protection, heat resistance, and low volatility.
Time period
2014
2026
Geography
China,Inner Mongolia Autonomous Region
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Direct esterification is the predominant technology for producing dioctyl terephthalate (DOTP), accounting for more than 90% of the domestic market. This dataset represents that technology. Terephthalic acid and 2-ethylhexanol are used as raw materials in a non-acid-catalyzed batch esterification process. Production includes esterification, alcohol removal, neutralization, stripping, dehydration, and filtration.
1. Esterification: Terephthalic acid and 2-ethylhexanol react in the presence of tetraisopropyl titanate catalyst to form DOTP.
2. Alcohol removal: Excess alcohol is separated based on differences in boiling point.
3. Neutralization and washing: Sodium hydroxide solution is added to the crude ester to deactivate the titanate catalyst and neutralize monoester acid by-products and residual terephthalic acid. Water washing removes these impurities so that the crude ester meets the quality requirements.
4. Steam stripping and drying, followed by decolorization and filtration.