Emulsion polymerization of vinyl acetate: Safe optimization of a hazardous complex process

Copelli, Sabrina; Derudi, Marco; Sempere, J.; Serra, Eduard; Lunghi, A.; Pasturenzi, Christian; Rota, Renato

doi:10.1016/j.jhazmat.2011.04.066

Cited by 13 publications

(13 citation statements)

References 16 publications

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“…Such phenomena correspond to a solid-phase transition between two different crystalline phases and a melting phase, respectively. 27 With regard to BA, it can be observed from the isothermal DSC test reported in Figure 2A that no self-initiated polymerization reactions occur at the selected temperature (70°C) for all of the investigated time; it is necessary to add an organic-soluble initiator (in this case AIBN) in order to observe a polymerization reaction (see Figure 2B). The same behavior is observed at 75 and 78°C.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, dynamic DSC tests have been performed on KPS and SLS (as discussed elsewhere 27 ), while a set of isothermal DSC tests have been carried out on BA ( Figure 2) using a Mettler Toledo DSC 823 apparatus and stainless steel, medium-pressure Viton/120 μL crucibles. All DSC tests have been performed under a nitrogen atmosphere to avoid eventual oxygen contributions.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Emulsion Polymerization of Butyl Acrylate: Safe Optimization Using Topological Criteria

Copelli

Torretta

Lunghi

et al. 2013

Ind. Eng. Chem. Res.

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Fast and strongly exothermic emulsion polymerization processes are particularly difficult to optimize from both safety and productivity points of view because of the occurrence of a number of undesired side reactions (e.g., propagation of tertiary radicals, chain transfer to monomer, backbiting, termination by disproportionation, etc.) and the triggering of boiling phenomena with consequent stable foam formation under atmospheric pressure. Therefore, it would be useful to develop a suitable combined theoretical and experimental procedure able to detect both the optimum process dosing time and initial reactor temperature. In this work, it is discussed how an extended version of the topological criterion theory, originally developed for isoperibolic semibatch reactors, can be used to safely optimize an indirectly cooled isothermal semibatch reactor. Moreover, such a methodology is applied to a case study represented by the synthesis of poly(butyl acrylate) through the radical emulsion polymerization of butyl acrylate.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Emulsion Polymerization of Butyl Acrylate: Safe Optimization Using Topological Criteria

Copelli

Torretta

Lunghi

et al. 2013

Ind. Eng. Chem. Res.

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“…Since a chemical reaction is the result of collisions between the reactant molecules of sufficiently high energy and effective orientation, a reaction rate equation can be expressed as the product of a probability factor, of an energy factor and of a concentration factor 28 . Comparing Equations (10) and (11) it can be noticed that:…”

Section: Reaction System Characterizationmentioning

confidence: 99%

“…In the process safety literature of the last decades several short-cut criteria have been developed to identify safe and productive operating conditions of exothermic semi-batch reactors (SBRs) without solving the mathematical model of the system, therefore saving a considerable amount of time [3][4][5][6][7][8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Simple Monitoring of Fine Chemical Runaway Reactions in Multipurpose Plants: Nitration of 2,4-Dichloro Benzotrifluoride

Maestri

Curti

Rota

2018

Ind. Eng. Chem. Res.

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In the fine chemical industry new production processes are often implemented in multipurpose existing plants with minimum adaptation investments. When the new process involves a potential runaway reaction, a full thermodynamic and kinetic characterization of the system should be performed to evaluate whether the reaction can be safely scaled-up in the selected plant. However, a detailed kinetic characterization is often unsuited because of the huge development rate of new products. In this work a potential runaway reaction of the agrochemical industry, that is, the nitration of 2,4-dichloro benzotrifluoride through mixed acids, is investigated with the aim of implementing it with a minimum experimental effort in an existing plant already dedicated to a similar reaction, that is, the nitration of 4-chloro benzotrifluoride. It has been shown that, even performing very similar reactions, the Ψ number criterion cannot be implemented in a univocal way to monitor the multipurpose SBR operation. Such a goal can instead be reached through the general procedure based on the Ψ, X and MTSRad set of process indicators, which was previously applied to the monitoring of polymerization processes.

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“…Modifying the reaction formulation by changing some of the components (e.g., initiator type) can also give promising results . Similarly, optimization of process conditions can also lead to significant improvements to residual monomer levels, as shown for the emulsion polymerization of vinyl acetate (VAc) …”

Section: Introductionmentioning

confidence: 99%

Applying the Principles of Green Chemistry to Polymer Production Technology

Dubé

Salehpour

2013

Macromol. React. Eng.

148

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Emulsion polymerization of vinyl acetate: Safe optimization of a hazardous complex process

Cited by 13 publications

References 16 publications

Emulsion Polymerization of Butyl Acrylate: Safe Optimization Using Topological Criteria

Emulsion Polymerization of Butyl Acrylate: Safe Optimization Using Topological Criteria

Simple Monitoring of Fine Chemical Runaway Reactions in Multipurpose Plants: Nitration of 2,4-Dichloro Benzotrifluoride

Applying the Principles of Green Chemistry to Polymer Production Technology

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