A series of iron complexes bearing a bis(imino)pyridine ligand were synthesised and examined as precatalysts for homopolymerisation of propylene. The alkyl substituents attached to the aryl group on the imine nitrogen atoms significantly affected the catalytic activity and molecular weight of the obtained polypropylenes. Copolymerisation of propylene and various allyl comonomers catalysed by ir...

The bacterial metabolism of propylene proceeds by epoxidation to epoxypropane followed by a sequence of three reactions resulting in epoxide ring opening and carboxylation to form acetoacetate. Coenzyme M (2-mercaptoethanesulfonic acid) (CoM) plays a central role in epoxide carboxylation by serving as the nucleophile for epoxide ring opening and the carrier of the C(3) unit that is ultimately c...

The main goal of this study was to describe the method of the synthesis of the dodecyl-, tetradecyl-, hexadecyl- and octadecyl-propylene glycol emulsifiers in the presence of selected anionic and nonionic surfactants. Acyl propylene glycol emulsifiers were produced by esterification of propane-1,2-diol (propylene glycol, PG) with C12:0-C18:0 fatty acids in the presence of anionic sodium dodecyl...

One of the critical units for isopropylbenzene production plants is unit preparation reactant fractions, in particular, used propane-propylene fraction. In accordance with Specifications TU 0272-024-00151638-99, content propylene this fraction must be at least 65% wt. Such a sufficiently low to carry out reaction benzene alkylation leads inefficient use volume reactor. The operation concentrati...

Abstract In recent years, there has been a trend toward replacing petrochemical raw materials with so-called “bio” plastics, i.e. plastics from renewable sources. Herein, the susceptibility of degradation in compost heap three types packaging polyesters, by means PET and biobased PEF PLA, other thermoplastic polyesters more methylene groups (three six) bio—(PTF PHF, respectively) petrochemicall...

Chronic exposure to propylene does not result in any increased incidence of tumors, yet does increase N7-hydroxypropylguanine (N7-HPGua) adducts in tissue DNA. To investigate any potential for genotoxicity (mutagenicity or clastogenicity), male F344 rats were exposed via inhalation to up to 10,000 ppm propylene for 1, 3, or 20 days (6 h/day, 5 days/week). The endpoints examined included gene (H...

Spirogyra neglecta (Hassall) Kützing is an edible freshwater macroalga. It available and consumed as local food in Thailand, especially the northern northeastern parts. To ascertain its good benefit for health safe consumption, this study was, therefore carried out to determine phytochemical compositions, nutritional contents, cytotoxicity, anti-inflammatory activity of different extracts from ...

Propylene and acetylene are released to mine air with the increase in the temperature of self-heating coal. Concentrations of these gases in mine air are applied as indicators of the progress of the self-heating process. Hydrocarbons emitted from the self-ignition center are sorbed on coal, while migrating through the mine workings. Coal crushed during the mining process is characterized by a h...