Activity and selectivity of alkaline and doublemetal cyanide catalysts in ethoxylation of fatty alcohols Aktywność i selektywność katalizatora alkalicznego i katalizatora dimetalocyjankowego w reakcjach oksyetylenowania alkoholi tłuszczowych

Janik, J. L.

doi:10.15199/62.2015.8.32

Cited by 2 publications

(3 citation statements)

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“…DMC is a coordination-type dimethylcyanide catalyst [4] used in industrial practice for the synthesis of polyetherpolyalcohols as intermediates for polyurethane polyols. The use of coordination DMC-type catalysts in the polyoxyalkylenation of detergent alcohols has not been appreciated by industry but there are a few exceptions [12,13]. Table 1 shows analytical characteristics of the test series of nonionic surfactants.…”

Section: Characterization Of Test Materialsmentioning

confidence: 99%

“…The ordinates show foamability (upper graph) in millimeters of foam layer and emulsifiability (lower graph) in seconds of emulsion lifetime for five concentrations of a mixture of surfactants (Figs. 3,4,5,6,7,8,9,10,11,12,13,14). The abscissae show the surfactant concentrations in the form of mole fractions.…”

Section: Surface Properties Of the Surfactant Test Systemsmentioning

confidence: 99%

“…Moreover, we investigated the effect of the range of homologue distribution on the curve profiles illustrating the dependence of surface properties vs. concentrations of components in the test mixtures. An alternative surfactant series with a different range of homologue distribution was generated using classical catalysis with an alkaline catalyst (KOH) which yielded products having the so-called broad range of distribution combined with propoxylation and ethoxylation using zinc hexacyanocobaltate as the double metal cyanide (DMC) coordination catalyst, generating oxyalkylenation products having a relatively narrow fractional composition [12,13]. [12,14].…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Activity of 2‐Ethylhexan‐1‐ol‐Based Surfactants in Quasi‐ternary Systems

Chruściel¹,

Hreczuch²,

Dąbrowska³

et al. 2016

J Surfact & Detergents

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The surface properties of quasi-ternary systems comprising two surfactants in water were studied in the light of previously published hypotheses of specific two-dimensional arrangements of associated surfactant molecules and compatibility of their hydrophobic chains. In contrast to the studies of model ternary systems of pure components reported previously in the literature, the title quasi-ternary systems were prepared as water solutions of two polydisperse mixtures of surfactants: an anionic one (quasi-component 1) and nonionic one (quasi-component 2). The complex quasi-components used were polydisperse in terms of both ethylene oxide substituent numbers and the carbon chain length, obtained as received under industrial conditions from commercial raw materials. The novel surfactants which are the subject of the present study were synthesized by elongation of the hydrophobic chain of 2-ethylhexan-1-ol molecules by catalytic polyaddition of methyloxirane (propylene oxide), followed by introduction into the resulting transformed structure of a hydrophilic group (in the form of a polyether chain and/or a sulfosuccinate group). All synthesized surfactants were therefore polydispersed mixtures of methyloxirane and oxirane (ethylene oxide) homologues. It was shown that, in the case of the quasi-ternary aqueous systems studied, the extrema of the investigated functions describing the surface properties occur in the neighborhood of some specific stoichiometric ratios of the surfactant concentrations, namely 1:3/3:1. On the other hand, synergistic effects associated with the compatibility of the hydrophobic chains studied were not confirmed.

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Section: Characterization Of Test Materialsmentioning

confidence: 99%

Section: Surface Properties Of the Surfactant Test Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interfacial Activity of 2‐Ethylhexan‐1‐ol‐Based Surfactants in Quasi‐ternary Systems

Chruściel¹,

Hreczuch²,

Dąbrowska³

et al. 2016

J Surfact & Detergents

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Characteristics of Block Copolymers of Methyl Oxirane and Oxirane Derivatives of 2-Ethylhexanol as Obtained with KOH and Dimetalcyanide Type Catalyst

Hreczuch

Chruściel

Dąbrowska

et al. 2016

Tenside Surfactants Detergents

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Two series of block copolymers of methyloxirane and oxirane, derivatives of 2-ethylhexanol, were obtained with the use of KOH as a conventional homogeneous alkaline catalyst and a coordinative dimetalcyanide catalyst (DMC), respectively. The DMC type catalyst showed much higher kinetic activities and its reaction exhibited a narrower distribution of homologues, as compared with those obtained in the presence of KOH. The thermogravimetric technique was proposed for the characterization of the fractional content of products. The pluming phenomenon and VOCs content were discussed as a practical aspect of the differences in fractional compositions of the products examined.

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Activity and selectivity of alkaline and doublemetal cyanide catalysts in ethoxylation of fatty alcohols Aktywność i selektywność katalizatora alkalicznego i katalizatora dimetalocyjankowego w reakcjach oksyetylenowania alkoholi tłuszczowych

Cited by 2 publications

References 1 publication

Interfacial Activity of 2‐Ethylhexan‐1‐ol‐Based Surfactants in Quasi‐ternary Systems

Interfacial Activity of 2‐Ethylhexan‐1‐ol‐Based Surfactants in Quasi‐ternary Systems

Characteristics of Block Copolymers of Methyl Oxirane and Oxirane Derivatives of 2-Ethylhexanol as Obtained with KOH and Dimetalcyanide Type Catalyst

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