Synthesis of Dimethyl Terephthalate from Terephthalic Acid Esterification over the Zeolite Catalysts DOI Creative Commons
Nan Jia, Haoyu Han, Tao Yang

и другие.

Inorganics, Год журнала: 2025, Номер 13(6), С. 184 - 184

Опубликована: Июнь 5, 2025

The esterification of terephthalic acid (PTA) with methanol to dimethyl terephthalate (DMT) was investigated using commercially available zeolite catalysts as the eco-friendly solid acids. Six typical zeolites (ZSM-5-25, ZSM-5-50, ZSM-5-100, ZSM-35, MOR, and β) were systematically evaluated. Among them, β showed excellent catalytic performance, achieving nearly 100% PTA conversion 76.1% DMT selectivity under conditions 200 °C, 0.5 MPa N2 pressure, m(PTA):V(methanol) 1:40 (g/mL), m(PTA):m(catalyst) 10:1 over 4 h. characterization results show that efficiency correlated site strength, specific surface area, mesoporous structure zeolite. After optimization, achieved 94.1% 1 m(PTA)/V(methanol) 1:30 m(PTA)/m(catalyst) 8:1 8 Moreover, exhibited superior stability, maintaining 92% its initial activity after five cycles, highlighting potential for sustainable production.

Язык: Английский

Enhanced chloroquine adsorption using cobalt-modified mesoporous silicas for water treatment DOI
Renata Mariane de Souza, Grace Anne Vieira Magalhães Ghiotto,

Rosângela Bergamasco

и другие.

Chemical Engineering and Processing - Process Intensification, Год журнала: 2025, Номер 210, С. 110224 - 110224

Опубликована: Фев. 17, 2025

Язык: Английский

Процитировано

0
Remoción de sales de cobre por sodalitas recubiertas con hidróxidos doble laminares DOI Creative Commons
Andrea P. Aparicio, José H. Quintana Mendoza, José Antonio Henao

и другие.

Tecnología y Ciencias del Agua, Год журнала: 2025, Номер unknown, С. 01 - 29

Опубликована: Апрель 29, 2025

Se sintetizaron zeolitas tipo sodalita a partir de silicio y aluminio posconsumo, las cuales se recubrieron con el hidróxido doble laminar (HDL) una relación molar Mg2+/Al3+=2, los formaron por método coprecipitación baja saturación. Las propiedades estructurales, morfológicas texturales la zeolita, HDL material recubierto determinaron mediante Difracción rayos X muestras Policristalinas (XRD), Microscopía Electrónica Barrido (SEM), espectroscopía resonancia magnética nuclear 27Al (RMN) medidas texturales. Los sólidos obtenidos utilizaron para eliminación Cu2+, Cl-, NO3- SO42- desde soluciones acuosas Cu(NO3)2, CuCl2 CuSO4, estudiando capacidad remoción espectrometría fluorescencia (XFR) Cl- SO42-, UV-Vis NO3-. resultados mostraron que zeolita recubierta fue capaz hacer captación simultánea cationes aniones como Cu2+ en 9,26 mmol*g-1, 9,34 8,82 mmol*g-1 14,41 mmol*g-1. Estos muestran recubiertas pueden usar retener dañinos medio ambiente, representan oportunidad diseñar catalizadores

Процитировано

0
Synthesis of Dimethyl Terephthalate from Terephthalic Acid Esterification over the Zeolite Catalysts DOI Creative Commons
Nan Jia, Haoyu Han, Tao Yang

и другие.

Inorganics, Год журнала: 2025, Номер 13(6), С. 184 - 184

Опубликована: Июнь 5, 2025

The esterification of terephthalic acid (PTA) with methanol to dimethyl terephthalate (DMT) was investigated using commercially available zeolite catalysts as the eco-friendly solid acids. Six typical zeolites (ZSM-5-25, ZSM-5-50, ZSM-5-100, ZSM-35, MOR, and β) were systematically evaluated. Among them, β showed excellent catalytic performance, achieving nearly 100% PTA conversion 76.1% DMT selectivity under conditions 200 °C, 0.5 MPa N2 pressure, m(PTA):V(methanol) 1:40 (g/mL), m(PTA):m(catalyst) 10:1 over 4 h. characterization results show that efficiency correlated site strength, specific surface area, mesoporous structure zeolite. After optimization, achieved 94.1% 1 m(PTA)/V(methanol) 1:30 m(PTA)/m(catalyst) 8:1 8 Moreover, exhibited superior stability, maintaining 92% its initial activity after five cycles, highlighting potential for sustainable production.

Язык: Английский

Процитировано

0