Pyrolysis of Dimethyl Hydrogen Phosphite

Beach, L. K.; Brogin, Robert; Shewmaker, James

doi:10.1021/i360006a014

Cited by 10 publications

(3 citation statements)

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“…A glance through the literature suggested that phosphite-based additives, when heated in a pyrolysis environment in the presence of water, might decompose into phosphate, which might be converted further into phosphonates. Beach et al reported phosphonates as major reaction products from low-temperature pyrolysis of dimethyl hydrogen phosphite. It was reported earlier (Hackspill and Weiss, 1932) that pyrolysis products of triethyl phosphite were phosphine and phosphates in the absence of water.…”

Section: Resultsmentioning

confidence: 99%

Triethyl Phosphite Additive-Based Fouling Inhibition Studies

Kumar

1999

Ind. Eng. Chem. Res.

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Coke formation during naphtha pyrolysis has been studied in the presence of triethyl phosphite in a jet-mixed reactor at the temperature of 1088 K. The quantitative effect of the addition of triethylphosphite has been reported. Concentrations of iron and phosphorus in the formed coke have been analyzed by chemical methods. For fresh coupons, the asymptotic rate of fouling was found proportional to the iron content of coke. A major decomposition product of the additive has been identified by chemical analysis of an aqueous effluent and a possible mechanism is proposed for the inhibition of coke formation.

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Section: Resultsmentioning

confidence: 99%

Triethyl Phosphite Additive-Based Fouling Inhibition Studies

Kumar

1999

Ind. Eng. Chem. Res.

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“…This fact can be explained taking into account that the catalyst can suffer a thermal degradation process. At elevated temperatures (above 160 • C), dimethyl H-phosphonate undergoes thermal decomposition to monomethyl H-phosphonate and dimethyl methylphosphonate (32,33). So, formed monomethyl H-phosphonate reacts with potassium t-butoxide to form potassium salt of monomethyl H-phosphonate and t-butanol:…”

Section: Sch 2 Radical Degradation Of Pu By Dimethyl H-phosphonatementioning

confidence: 99%

Kinetics and Mechanism of the Chemical Degradation of Flexible Polyurethane Foam Wastes with Dimethyl H-phosphonate with Different Catalysts

Molero

Mitova

Troev

et al. 2010

Journal of Macromolecular Science, Part A

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Flexible polyurethane foams (PU) based on toluene diisocyanate and polyether polyol have been degraded by dimethyl H-phosphonate (DMP) in the presence of catalysts such as potassium tert-butoxide, potassium and azobisisobutyronitrile (AIBN). The structure and molecular weight of the degraded products were monitored by 31 P-NMR and GPC. The degradation process was controlled by the polydispersity (PD) of the reaction product. Potassium tert-butoxide enhances interchange reactions compared to the non catalyzed process. The product of degradation contains mainly the original polyol capped with a phosphonate group and a phosphorous dimmer of the original polyol.

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“…The thermal degradation [8] of dimethyl hydrogen phosphonate leads to the formation of dimethyl methylphosphonate 8.…”

Section: Reaction Between Dimethyl Hydrogen Phosphonate and Urethanementioning

confidence: 99%

Study of the reactions of dimethyl hydrogen phosphonate with urethane and acetanilide

Troev

2000

Heteroatom Chem.

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In this article, a new reactivity of dimethyl hydrogen phosphonate is described. It was established that the reaction between dimethyl hydrogen phosphonate and urethane encompasses two simultaneous processes: an exchange reaction between the methoxy groups of the phosphonate and urethane groups and alkylation of the urethane. The reaction of dimethyl hydrogen phosphonate with acetanilide represents an alkylation of the amido group. The structure of the resulting products was studied by means of 1H, 31P, and 13C NMR spectroscopy. © 2000 John Wiley & Sons, Inc. Heteroatom Chem 11:205–208, 2000

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Pyrolysis of Dimethyl Hydrogen Phosphite

Cited by 10 publications

References 1 publication

Triethyl Phosphite Additive-Based Fouling Inhibition Studies

Triethyl Phosphite Additive-Based Fouling Inhibition Studies

Kinetics and Mechanism of the Chemical Degradation of Flexible Polyurethane Foam Wastes with Dimethyl H-phosphonate with Different Catalysts

Study of the reactions of dimethyl hydrogen phosphonate with urethane and acetanilide

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