Entity

Time filter

Source Type

Kędzierzyn-Koźle, Poland

Lawniczak-Jablonska K.,Polish Academy of Sciences | Chrusciel A.,MEXEO
Journal of Physics: Conference Series | Year: 2016

Double metal cyanide (DMC) catalysts are commonly applied at industrial ring opening polymerization of epoxides. Nevertheless, the knowledge on the molecular nature of their high activity and selectivity is limited. XAS studies were performed to look for the possible catalytic centre in this family of catalysts. DMC catalysts were synthesized from ZnCl2 and potassium hexacyanocobaltate(III) solution, in the presence of the different organic ligands and show significant fraction of the non-crystalline structure. Two ligands were analysed (tert-butanol ( t BuOH) or glyme (CH3OCH2CH2OCH3)). EXAFS analysis established that only Zn atoms are the active metallic centers in DMC regardless the used ligand. The coordination around Zn was changed from octahedral in reference non catalytic material to tetrahedral in catalysts, and Cl atoms were detected near some of Zn atoms. Source


Guzialowska-Tic J.,Opole University of Technology | Hreczuch W.,MEXEO | Tic W.J.,Opole University of Technology
Przemysl Chemiczny | Year: 2012

Numerical data on prodn. and consumption of vegetable oils and animal fats were collected and analyzed. Source


Sun Y.-Q.,China Research Institute of Daily Chemical Industry | Li W.-J.,China Research Institute of Daily Chemical Industry | Wang W.-X.,China Research Institute of Daily Chemical Industry | Li Q.-X.,China Research Institute of Daily Chemical Industry | And 2 more authors.
Tenside, Surfactants, Detergents | Year: 2013

A novel polyether esterquat (EQDMS-3EO) was obtained by ethoxylation followed by quaternization of an ester-amine. Its structure and performance were examined. The softening, antistatic, rewettability properties and fabric whiteness impact were determined and compared to conventional esterquat compounds, known from the art in the field. The results showed that antistatic and rewettability properties of the EO-modified EQDMS-3EO were better than those of the conventional counterparts, and its softening property was comparable or better. As a result, EQDMS-3EO is a new softener with superior properties. © Carl Hanser Publisher, Munich. Source


Materna K.,Poznan University of Technology | Tic W.J.,Opole University of Technology | Sokolowski A.,Wroclaw University of Technology | Hreczuch W.,MEXEO
Central European Journal of Chemistry | Year: 2011

A series of ethoxylates of 2,2,4-trimethyl-1,3-pentanediol mono-isobutyrate representing a synthetic C12 hydroxyester hydrophobe was obtained. The solubility parameters, surface tension and critical micelle concentrations for model solutions were investigated. The new surfactants were found to produce extremely low foam levels and a non-standard surface interfacial behavior was determined. It was observed that the ethoxylates of the C12 hydroxyester formed an oriented monolayer at the interface regardless of their average polyaddition degree. Such behavior is different from the surface activities of commonly known linear nonionic surfactants and it indicates self organization of the surfactants at the interface. This feature offers possibility for application of these surfactants in nanotechnology as well as in the conventional cleaning processes. © Versita Sp. z o.o. Source


Di Serio M.,University of Naples Federico II | Tesser R.,University of Naples Federico II | Russo V.,University of Naples Federico II | Turco R.,University of Naples Federico II | And 3 more authors.
Journal of Surfactants and Detergents | Year: 2015

The intermediates for the production of nonionic surfactants can be derived from petrochemicals and/or from renewable raw materials. In both, the role of catalysis is fundamental. In this paper the main results reported in the literature related with the catalysis for ethoxylation of fatty esters will be reviewed. The main open challenges for these technologies will be outlined. © 2015 AOCS. Source

Discover hidden collaborations