Patents by Inventor Maria Frades Tapia

Maria Frades Tapia has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • AN IMPROVED PROCESS FOR THE RECOVERY OF ZINC FROM ZINC-BEARING RAW MATERIALS
    Publication number: 20230094835
    Abstract: The present invention refers to an improved process for recovering zinc from primary and secondary raw materials, said process comprising a first leaching step wherein the ratio between the zinc weight contained in the raw material and the volume of the leaching solution is at least 20 kg zinc per m3 of acid aqueous solution; a neutralization step; and a solvent extraction stage in the presence of organic extractant, wherein the temperature is maintained from 47 to 52° C.
    Type: Application
    Filed: October 13, 2020
    Publication date: March 30, 2023
    Applicant: TÉCNICAS REUNIDAS, S.A.
    Inventors: Ana Belén Mejías Cordero, Emilio Pecharromàn Mercado, Maria Frades Tapia, Sergio Sanguilinda Solàn
  • Levulinic acid purification
    Patent number: 11535582
    Abstract: The present invention refers to a process for the purification of levulinic acid, an aqueous solution comprising levulinic acid and a process for the production of levulinic acid.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: December 27, 2022
    Assignee: TÉCNICAS REUNIDAS, S.A.
    Inventors: Vicente López Fernández, Lourdes Arribas Martínez, Maria Frades Tapia, Álvaro Ruiz Pérez
  • LEVULINIC ACID PURIFICATION
    Publication number: 20210253508
    Abstract: The present invention refers to a process for the purification of levulinic acid, an aqueous solution comprising levulinic acid and a process for the production of levulinic acid.
    Type: Application
    Filed: July 17, 2019
    Publication date: August 19, 2021
    Inventors: Vicente LÓPEZ FERNÁNDEZ, Lourdes ARRIBAS MARTÍNEZ, Maria FRADES TAPIA, Álvaro RUIZ PÉREZ
  • Process for the selective recovery of lead and silver
    Patent number: 10526683
    Abstract: The present invention relates to a process for the selective and ecoefficient recovery of lead and silver jointly as a concentrate product from hydrometallurgical residues.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 7, 2020
    Assignee: Ténicas Reunidas, S.A.
    Inventors: Carlos Alvarez Carreño, Maite Pinedo González, Emilio Pecharromán Mercado, Nuria Ocaña García, Maria Frades Tapia
  • PROCESS FOR THE SELECTIVE RECOVERY OF LEAD AND SILVER
    Publication number: 20160244862
    Abstract: The present invention relates to a process for the selective and ecoefficient recovery of lead and silver jointly as a concentrate product from hydrometallurgical residues.
    Type: Application
    Filed: September 26, 2014
    Publication date: August 25, 2016
    Inventors: Carlos Alvarez Carreño, Maite Pinedo González, Emilio Pecharromán Mercado, Nuria Ocaña García, Maria Frades Tapia
  • Mixing and settling method and device in solvent extraction processes to recover high-purity products
    Patent number: 7507343
    Abstract: The device of the invention includes the following 5 new elements in each mixer-settler: a) agitators with blunt edged turbines, b) decreasing degree of agitation throughout the series of mixing compartments, c) baffle with a central window in the settler interface, located after the flow buffers, and d) baffle without a window, centered in the settler interface, located after the baffle with a window. These elements allow for an operative method which inhibits secondary dispersion, reducing the formation of micro-droplets, without affecting the mass transfer between the phases. Consequently, this obtains a phase separation process with entrainments so small that it is possible to drastically increase the quality of the product, by obtaining an ultra-pure aqueous extract, simultaneously reducing the settling surface required.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: March 24, 2009
    Assignee: Tecnicas Reunidas S.A.
    Inventors: Daniel Martin San Lorenzo, Gustavo Diaz Nogueira, Maria Frades Tapia