Diverging trends of plasticizers (phthalates and non-phthalates)
The plasticizer market changed in response to the restriction of low molecular weight (LMW) phthalate plasticizers such as Di (2-ethylhexyl) phthalate (DEHP) due to their hazardous properties. We investigated patterns and trends of 19 regulated and emerging plasticizers in house dust from German homes and in suspended particulate matter (SPM) from major German rivers.
Supercritical CO2 extraction of phthalate plasticizers from PVC
Three common phthalates, namely, dioctyl phthalate, diisodecyl phthalate, and trioctyl trimellitate, were used as plasticizers for poly (vinyl chloride) (PVC) processing, and the extraction of these plasticizers were investigated using supercritical CO 2 fluids. Factors affecting the extractions of these phthalates were focused.
Supercritical CO2 Extraction of Phthalate Plasticizers from PVC
Three common phthalates, namely, dioctyl phthalate, diisodecyl phthalate, and trioctyl trimellitate, were used as plasticizers for poly (vinyl chloride) (PVC) processing, and the extraction...
Supercritical CO2 Extraction and Purification of Compounds with
Supercritical fluid extraction (SCFE), based on the utilization of a fluid under supercritical conditions, is a technology suitable for extraction and purification of a variety of compounds, particularly those that have low volatility and/or are susceptible to thermal degradation. The interest in SCFE is promoted by legal limitations of conventional solvents for food and pharmaceutical uses
Extracting endocrine disrupting compounds from infant formula using
In the case of DEHP, 4-NP and BPA, supercritical carbon dioxide (scCO2) extraction is reported from effluent and sludges, sediments, PVC resins and dust. Table 1 describes a resume of reported studies in extraction of these ECs. Table 1. Extraction of DEHP, 4-NP and BPA using scCO 2. NE = not employed. NPEO = nonylphenol polyethoxylated.
- Does continuous supercritical carbon dioxide remove bis (2-ethylhexyl) phthalate (DOP) from PVC?
- The results show that continuous supercritical carbon dioxide efficiently removes bis (2-ethylhexyl) phthalate (DOP) from PVC with extraction efficiencies of more than 98% which resulted in PVC samples with over 99.5% purity. A process model based on the Sovová model accurately describes the extraction process.
- Does carbon dioxide remove bis (2-ethylhexyl) phthalate from PVC?
- Experiments were performed at 100 to 500 bar with temperatures varying from 75 to 110 °C. The results show that continuous supercritical carbon dioxide efficiently removes bis (2-ethylhexyl) phthalate (DOP) from PVC with extraction efficiencies of more than 98% which resulted in PVC samples with over 99.5% purity.
- Can supercritical carbon dioxide remove plasticizers from poly (vinyl chloride)?
- This study explores using extraction with supercritical carbon dioxide to remove plasticizers from poly (vinyl chloride) (PVC), with the aim to enhance recycling processes. Experiments were performed at 100 to 500 bar with temperatures varying from 75 to 110 °C.
- Is scCO2 extraction a green technology for toxic phthalates removal?
- This study utilizes scCO2 extraction as a green technology for toxic phthalates removal from plasticized PVC and analyzes its effect on the PVC properties to enable sustainable recycling of industr...
- Which plasticizers can be extracted from PVC?
- Guerra et al. conducted extraction and analysis of other plasticizers in PVC such as citrate and benzoate. (16,17) Extraction efficiencies higher than 99% were achieved at optimal extraction conditions, which were in the range of 390–460 bar, 95–100 °C, and 20–30 min extraction time.
- What is the concentration of plasticizers in PVC?
- The concentration of plasticizers in a typical PVC formulation varies between 15 and 50 wt % depending on the final product requirements. (7) The most commonly used plasticizers in PVC are phthalates, which are esters of phthalic acid. Phthalates make up 80% of the total volume of plasticizers used today.
