Thermal hazard evaluation of runaway polymerization of acrylic acid

Fujita, Masatoshi; Izato, Yu‐ichiro; Iizuka, Yoshiaki; Miyake, Akira

doi:10.1016/j.psep.2019.08.003

Cited by 32 publications

(22 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Acrylic acid is known to polymerize through a Michael addition reaction, 43 which generates thermal energy and selfaccelerates polymerization. 44,45 It has been reported that alkali metal acrylates, alkali-earth metal acrylates, and transition metal acrylates show thermally induced solid-state polymerization. 46,47 Considering these facts, the thermal Fig.…”

Section: Solid-state Thermal Polymerization Of Acrylates Intercalated In Layered Metal Hydroxidesmentioning

confidence: 99%

Interconnection of organic–inorganic hybrid nano-building blocks towards thermally robust mesoporous structures

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Solid-state Thermal Polymerization Of Acrylates Intercalated In Layered Metal Hydroxidesmentioning

confidence: 99%

Interconnection of organic–inorganic hybrid nano-building blocks towards thermally robust mesoporous structures

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, organic-organic pervaporation (for the removal of methanol) is a more promising technology for, e.g., acetate, (meth)acrylate and propionate ester production. In the case of (meth)acrylate ester production, (exothermic) polymerization during transesterification is a risk inherently associated with (meth)acrylates, which has already caused many accidents in chemical industries [15]. Inhibitors such as 4-methoxyphenol (MEHQ) are added to prevent its spontaneous polymerization.…”

Section: Introductionmentioning

confidence: 99%

Rational Design Method Based on Techno-Economic Principles for Integration of Organic/Organic Pervaporation with Lipase Catalyzed Transesterification

et al. 2021

View full text Add to dashboard Cite

An engineering foundation is developed in this manuscript to allow the rational design of enzymatic transesterifications integrated with organic–organic pervaporation for the removal of methanol. In the first part, enzyme kinetics are elucidated for the solventless transesterification of two monoterpene alcohols with methyl acetate catalyzed by Novozym 435. Nonlinear regression revealed that three parameters (enzyme loading, forward and backward second-order reaction rate) sufficed to describe the entire conversion as a function of time. In the second part, a mathematical model for acetate ester production, integrated with organic–organic pervaporation, was developed based on a set of ordinary differential equations. To this end, empirical formulae for the pervaporation performance (of a PERVAP 2255-30 membrane and a standard HybSi® membrane) were established, relating methyl acetate and methanol flux to the methanol concentration in the reactor. The resulting digital twin, “PervApp”, allows us to study the influence of the key design parameters “enzyme loading” and “membrane surface” on, e.g., catalyst productivity. Finally, a techno-economic assessment is made for an annual production of 100 tons of geranyl acetate. The described methodology allows producers to shift from laborious, expensive and often disappointing trial-and-error approaches to the rational design of such integrated units.

show abstract

“…Once the control of the reaction is lost, the temperature can rise rapidly leaving little time for correction. The reaction vessel may be at risk from over-pressurization due to violent boiling or rapid gas generation 4, 5 . One of the tools used to determine the process safety of hazard-type reactions is thermokinetics 6, 7 .…”

Section: Introductionmentioning

confidence: 99%

The influence of sulfur addition on the hazard-type reaction of ilmenite ores with sulfuric acid

Jabłoński

Lubkowski

Tylutka

et al. 2021

Polish Journal of Chemical Technology

View full text Add to dashboard Cite

The paper presents results of thermokinetic investigation of the hazard-type reaction of Norwegian and Australian ilmenite ores with sulfuric acid, modified by the addition of elemental sulfur, to increase the process safety in industrial conditions. In the reactions of both ilmenite ores the addition of sulfur caused a reduction of the thermal power generated in the reaction and a decrease in the value of the thermokinetic parameter ΔTmax/Δτ for almost the whole range of initial concentrations of sulfuric acid. It was also found that the addition of sulfur to the reaction did not negatively affect the degree of ilmenite leaching. The interpretation of the obtained thermokinetic curves allowed to determine safe process conditions for both types of titanium raw materials.

show abstract

Thermal hazard evaluation of runaway polymerization of acrylic acid

Cited by 32 publications

References 25 publications

Interconnection of organic–inorganic hybrid nano-building blocks towards thermally robust mesoporous structures

Interconnection of organic–inorganic hybrid nano-building blocks towards thermally robust mesoporous structures

Rational Design Method Based on Techno-Economic Principles for Integration of Organic/Organic Pervaporation with Lipase Catalyzed Transesterification

The influence of sulfur addition on the hazard-type reaction of ilmenite ores with sulfuric acid

Contact Info

Product

Resources

About