Abstracts Book - IMRC 2018

• SF3-P016
ACIDIC HOMOGENEOUS AND HETEROGENEOUS CATALYSIS FOR
THE SYNTHESIS OF NONYLPHENOL FORMALDEHYDE RESINS
(NPFR)
Maria Ines Flores Conde 1 , Adriana del Carmen Galván Cabrera 1 , Miguel Ángel Vázquez
Guevara 1 , Merced Martínez Rosales 1 , Jose Manuel Dominguez 2 , Alma Delia Miranda Olvera 2
1 Universidad de Guanajuato, Departamento de Química, División de Ciencias Naturales y
Exactas, Mexico. 2 Instituto Mexicano del Petróleo, , Mexico.
Nonylphenol formaldehyde resins (NPFR) are compounds used as additives in
the stabilization of crude oils avoiding the asphaltene precipitation. Particularly,
in vacuum residue (VR) and hydroprocessed petroleum. NPFR are effective
asphaltene dispersants with molecular weight superior to 900 Da. Usually,
synthesis is well done with strong homogeneous acids, as H 2 SO 4 . In this work,
we synthesized NPFR with different acid catalytic systems. We used
homogeneous catalysis with dodecylbenzenesulfonic acid and p-
toluenesulfonic acid; heterogeneous catalysis with H 2 SO 4 activated Dowex resin
and acid zeolites and finally, we tested hybrid catalysis with immobilized
H 3 PW 12 O 40 (HPW) heteropolyacid over mesocellular silica foam (MCF) through
ionic liquids. We also analyzed solvent and temperature effects. We measure the
relative solubility index for all the obtained NPFR. Also, we analyze the resins
with MALDI-TOF-MS for molecular weight determination. HPW hybrid resulted
to be the best catalyst in this transformation due to molecular weight superior
to 900 Da and homogenous polymeric distribution. We include hybrid catalyst
characterization by N 2 adsorption-desorption, SAXS and XRD, UV-Vis DRS, FT-IR,
and CP-MAS 13 C and 29 Si NMR.