Results 211 to 220 of about 16,657 (260)

Obtaining Terephthalic Acid by Chemical Recycling of Polyethylene Terephthalate via Hydrolysis Using Sulphuric Acid

open access: yesعلوم و تکنولوژی پلیمر, 2005
A.R.Oroomieee ارومیه‌ای   +3 more
openaire   +1 more source

Oligomeric bishydroxybutyl terephthalates from terephthalic acid

Journal of Polymer Science: Polymer Chemistry Edition, 1981
AbstractA process that uses terephthalic acid and excess 1,4‐butanediol for the production of polybutylene terephthalate was investigated and the reaction conditions were maximized for fast reaction and minimal loss of butanediol by dehydration to tetrahydrofuran.
A. Buyle Padias, H. K. Hall
openaire   +1 more source

Hydrolysis of waste polyethylene terephthalate catalyzed by easily recyclable terephthalic acid

Waste Management, 2021
Hydrolysis of polyethylene terephthalate (PET) is an efficient strategy for the depolymerization of waste PET to terephthalic acid (TPA), which can be used as a fundamental building block for the repolymerization of PET or for the synthesis of biodegradable plastics and metal-organic frameworks.
Weisheng Yang   +4 more
openaire   +2 more sources

Absorption, Distribution and Excretion of Terephthalic Acid and Dimethyl Terephthalate

American Industrial Hygiene Association Journal, 1975
Data from a radiotracer study in rabbits and rats to determine the absorption, distribution, and excretion of terephthalic acid (TA) and dimethyl terephthalate (DMT) following oral, intratracheal, dermal and ocular administration indicate the following: (1) a rapid absorption and excretion of 14C-TA and 14C-DMT with no evidence of tissue accumulation ...
A E, Moffitt   +4 more
openaire   +2 more sources

The renal handling of terephthalic acid

Toxicology and Applied Pharmacology, 1985
By use of the Sperber in vivo chicken preparation method (1948, Ann. R. Agric. Coll. Swed. 15, 317-349), infusion of radiolabeled terephthalic acid ([14C]TPA) into the renal portal circulation revealed a first-pass excretion of the unchanged compound into the urine. This model was utilized further to characterize the excretory transport of [14C]TPA and
L M, Tremaine, A J, Quebbemann
openaire   +2 more sources

Terephthalic acid esterification kinetics: 2‐(2‐methoxyethoxy)ethyl terephthalates

Journal of Polymer Science: Polymer Chemistry Edition, 1979
AbstractThe process of esterification of terephthalic acid is characterized by a mechanism that involves three equilibrium reactions. Two are esterification‐hydrolysis equilibria entailing the reactions of the two terephthalic acid carboxyl groups with alcoholic hydroxyl groups, whereas the third one is a transesterification‐acidolysis equilibrium that
H. K. Reimschuessel, B. T. Debona
openaire   +1 more source

Production of Terephthalic Acid from Waste Polyethylene Terephthalate) Materials

Journal of Polymer Engineering, 2008
A comparative study of hydrolysis of PET waste has been carried out under various reaction conditions. PET was hydrolyzed with sodium hydroxide in different solvents at reflux as well as by fusion in solventless conditions at atmospheric pressure. Best results were obtained when PET chips were heated to dryness with sodium hydroxide in minimum amount ...
J. Anwar   +4 more
openaire   +1 more source

The synthesis of poly(butylene terephthalate) from terephthalic acid, part I: The influence of terephthalic acid on the tetrahydrofuran formation

Journal of Applied Polymer Science, 2009
AbstractAn in depth study is performed on the origin of and influences on the formation of tetrahydrofuran (THF) during the first stage of the terephthalic acid (TPA) based synthesis of poly(butylene terephthalate) (PBT). Although many improvements on the synthesis process of PBT have been reported in literature to suppress this undesired side reaction,
Devroede, Jan   +3 more
openaire   +3 more sources

[Toxicokinetics of terephthalic acid].

Wei sheng yan jiu = Journal of hygiene research, 2002
In order to study the toxicokinetics of terephthalic acid(TPA) in rats, and provide scientific basis for its biological exposed index (BEI), the concentrations of urine TPA in rats after single oral administration in dose of 100 mg/kg BW were determined by high pressure liquid chromatography.
H, Yao, X, Wang, D, Wang, J, Dai
openaire   +1 more source

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