The synthesis of nylon 4,T from tetramethylenediamine and a terephthalic acid derivative was studied in a two stepprocess: prepolymerization, followed by postcondensation in the solid state (4 h, m C ) . The prepolymers were prepared by the nylon salt method, ester polymerization method, interfacial method, and a low temperature solution method. A maximum qinh of 1.52 was obtained. From a solut...

In this communication, we describe p-xylene oxidation with molecular oxygen at 373 K and atmospheric pressure using N-hydroximide catalysts. p-Xylene conversion was rather high over the first 2 h of reaction and complete by the end of the experiment. The product distribution curves versus reaction time are typical of consecutive reactions. The main intermediate product is p-toluic acid. Peak co...

A pad-plate method of assaying residual amounts of chlortetracycline (CTC) and oxytetracycline (OTC) using Bacillus cereus 213 was used to determine amounts of antibiotic left in tissues and eggs of poultry fed 1,000 and 200 ppm of CTC and OTC in basal feed mixtures. The effects of various methods of cooking the tissues and eggs and the potentiating effect of terephthalic acid (TPA) were studie...

Exploiting biomass as an alternative to petrochemicals for the production of commodity plastics is vitally important if we are to become a more sustainable society. Here, we report a synthetic route for the production of terephthalic acid (TPA), the monomer of the widely used thermoplastic polymer poly(ethylene terephthalate) (PET), from the biomass-derived starting material furfural. Biobased ...

In the title compound, C(12)H(10)N(4)·C(8)H(6)O(4), 1,4-bis-(imidazol-1-yl)benzene and terephthalic acid mol-ecules are joined via strong O-H⋯N hydrogen bonds to form infinite zigzag chains. Both mol-ecules are located on crystallographic inversion centers. The O-H⋯N hydrogen-bonded chains are assembled into two-dimensional layers through weak C-H⋯O and strong π-π stacking inter-actions [centro...