Dehydration and drying poly(vinyl)chloride (PVC) porous grains: 1. Centrifugation and drying in controlled humid atmospheres

Agaciak, Philippe; Yahiaoui, Samir; Djabourov, Madeleine; Lasuye, Thierry

doi:10.1016/j.colsurfa.2015.01.012

Cited by 7 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the drying stage, the PVC paste is dried with an air stream at approximately 250 • C in a rotary dryer (D-101). The resulting moisture content of the polymer is 0.01% by weight [29].…”

Section: Process Descriptionmentioning

confidence: 99%

Environmental Impacts Assessment in Suspension PVC Production Process Using Computer-Aided Process Engineering

González-Delgado,

Ramos-Olmos,

Aguilar-Vásquez

2023

Polymers

View full text Add to dashboard Cite

The new demands for sustainable operation in the chemical industry due to increasing environmental regulations and agreements have generated the need to adapt existing processes to more intelligent production. The plastics sector is in a complex position due to its contribution to economic development and the climate crisis. Therefore, environmental assessment has become an important tool due to the benefits it provides by quantifying the environmental performance of processes, allowing it to balance operational and environmental needs. Polyvinyl chloride (PVC) is one of the most globally used polymers thanks to its resistance, flexibility, and cost-effectiveness. The polymer is synthetized by suspension polymerization, which is characterized by high productivity and controllability. However, it presents problems associated with intensive energy consumption and the emission of toxic substances and greenhouse gases. Therefore, an environmental assessment of the suspension PVC production process was performed using the waste reduction algorithm (WAR). The potential environmental impact (PEI) was quantified using the generation rate and the output velocity for four cases and three different fuels. It was found that the process transforms raw materials with high impacts, such as VCM, into substances with lower PEI, such as PVC. However, the process has a high generation of PEI due to the effects of energy consumption (−2860, −2410, 3020, and 3410 for cases 1–4, respectively). The evaluation of the toxicological impacts shows that the ATP category is the only one that presents a positive generation value (75 PEI/day); the product contributes to the formation and emission of impacts. The atmospheric categories showed that the energy consumption of the process is the most critical aspect with a contribution of 91% of the total impacts emitted. The AP and GWP categories presented the highest values. It was determined that the most suitable fuel is natural gas; it has lower impacts than liquid and solid fuels (coal). Additionally, it can be concluded that the PVC production process by suspension is environmentally acceptable compared to the polyethylene or polypropylene processes, with output impacts 228 and 2561 times lower, respectively.

show abstract

“…In the drying stage, the PVC paste is dried with an air stream at approximately 250 • C in a rotary dryer (D-101). The resulting moisture content of the polymer is 0.01% by weight [29].…”

Section: Process Descriptionmentioning

confidence: 99%

Environmental Impacts Assessment in Suspension PVC Production Process Using Computer-Aided Process Engineering

González-Delgado,

Ramos-Olmos,

Aguilar-Vásquez

2023

Polymers

View full text Add to dashboard Cite

show abstract

“…In the drying stage, the remaining moisture inside the PVC is removed by an air stream (stream 24) that is collected and heated to approximately 250 • C; this is done in a dryer where the streams are mixed, reaching a temperature of 70 • C at the end of the operation. The resulting moisture content of the polymer stream that leaves the dryer is 0.01% by weight [22].…”

Section: Process Descriptionmentioning

confidence: 99%

A Joint Computer-Aided Simulation and Water-Energy-Product (WEP) Approach for Technical Evaluation of PVC Production

Aguilar-Vásquez,

Ramos-Olmos,

González-Delgado

2023

Sustainability

View full text Add to dashboard Cite

Recently, polyvinyl chloride (PVC) has emerged as one of the most widely used polymers on the planet due to its versatile mechanical properties and chemical resistance. Suspension polymerization is the most employed method for its production, owing to its ability to control polymer characteristics and cost-effectiveness. However, issues such as water and energy consumption and management in the process have sparked interest in researching the performance and sustainability of the process. In this study, an approach for the technical evaluation of the PVC production process by suspension is proposed, using 11 indicators related to Water, Energy and Product (WEP), based on technical parameters and process simulation for the diagnosis of the process, framed under sustainability criteria. The simulation included the purification and drying stages of the polymer, along with a monomer recirculation stage. The properties of PVC obtained through the process simulation were over 90% accurate when compared to the literature. The technical analysis found that the process has high performance in the handling of vinyl chloride monomer (VCM) and PVC, with a production yield of 99% and an index of reused unconverted material of 99%. On the other hand, there are opportunities for improvement in the process, related to water usage management, since the indicator of wastewater production was 80% and the fractional water consumption was 1.8 m3/t. Regarding energy use, the process exhibits high consumption and an energy-specific intensity of 4682 MJ/t of PVC, but it has a low overall cost due to the use of natural gas in some stages of the process.

show abstract

“…It becomes an essential material in many aspects of modern daily life . Due to its particular properties like low cost, easy modification, and excellent performance, PVC is used as a suitable plastic for a wide variety of applications . Unfortunately, PVC suffers from both poor heat and light stability, since it undergoes rapid autocatalytic dehydrochlorination process due to the evolution of HCl gas upon exposure to heat and light during its fabrication and use, respectively.…”

Section: Introductionmentioning

confidence: 99%

Photostability, thermal and mechanical properties of poly(vinyl chloride)/novel acrylate terpolymer blend

Nazer

Elgohary

Rabie

2018

Vinyl Additive Technology

View full text Add to dashboard Cite

Methyl methacrylate/2‐hydroxyethyl methacrylate/maleic anhydride terpolymer with various compositions was synthesized, characterized and investigated as a photostabilizer for rigid polyvinyl chloride (PVC). The chemical structure of the terpolymer MMA/HEMA/MA, was confirmed by ultraviolet–visible and FTIR, spectroscopy. The molecular weights of the terpolymer were determined by applying gel permeation chromatography. The stabilizing efficiency of the terpolymer was evaluated by the determination of the weight loss of PVC/terpolymer blends after various irradiation times. The content of the formed gel as well as the intrinsic viscosity of the soluble fraction of the photodegraded polymer were also determined. The efficiency was also evaluated by measuring the extent of the discoloration of the photodegraded polymer. Thermal gravimetric analysis of the terpolymer and PVC/terpolymer blend were measured. Moreover, physicomechanical properties of photodegraded stabilized PVC samples were as well measured. The results revealed that the photostabilizing efficiency as well as thermal stability increased in the presence of the terpolymer as blended with PVC and by the increase of maleic anhydride ratio in the terpolymer. The photostabilizing efficiencies were compared with the industrially known UV absorber 2‐hydroxy‐4‐(octyloxy) phenylbenzophenone. J. VINYL ADDIT. TECHNOL., 25:E55–E62, 2019. © 2018 Society of Plastics Engineers

show abstract

Dehydration and drying poly(vinyl)chloride (PVC) porous grains: 1. Centrifugation and drying in controlled humid atmospheres

Cited by 7 publications

References 6 publications

Environmental Impacts Assessment in Suspension PVC Production Process Using Computer-Aided Process Engineering

Environmental Impacts Assessment in Suspension PVC Production Process Using Computer-Aided Process Engineering

A Joint Computer-Aided Simulation and Water-Energy-Product (WEP) Approach for Technical Evaluation of PVC Production

Photostability, thermal and mechanical properties of poly(vinyl chloride)/novel acrylate terpolymer blend

Contact Info

Product

Resources

About