Petroleo Brasileiro S.a. - Petrobras

Universidade Federal De Minas Gerais - Ufmg

Statoil Brasil Oleo E Gas Ltda

Wander Luiz Vasconcelos

Jailton Ferreira Do Nascimento

Daniela Cordeiro Leite Vasconcelos

Wilson Mantovani Grava

Douglas Fernandes De Souza

Peter Wilhelmus Jacques Derks

Eduardo Henrique Martins Nunes

Mariana Arruda Pereira

Alan Marcos Da Silva Reis

Priscila Cristh Fonseca Alves

Débora Guimarães Da Silva

Jéssica De Oliveira Notório Ribeiro

The present invention relates to a geopolymer produced from a synthetic aluminosilicate. The synthetic aluminosilicate was produced by sol gel technology, heat treated and, later, activated using sodium silicate and sodium hydroxide in solution, having as a final product a synthetic geopolymer. The final product was submitted to COadsorption analysis using thermogravimetry for adsorbed quantification. In addition to the pure geopolymer, it is also possible to produce the synthetic geopolymer with the addition of surfactant, or in the composite form with the addition of zeolite, or heat treated to form a zeolite or functionalized with amine, for example, to increase the adsorption capacity.

Process for obtaining synthetic geopolymers and synthetic geopolymers

Provided is a mold cooling system for the manufacturing of ceramic parts by freeze-casting including: a source () of cooling gas; a cooling gas cooling medium () fluidically connected to the cooling gas source (); and a cooling cell (), fluidly connected to the cooling gas cooling medium (), including a mold () in its interior, wherein the cooling cell () includes a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting including the stages of: refrigerating a cooling gas coming from a cooling gas source (); and injecting a cooling gas that is refrigerated in a cooling cell () including a mold () in its interior.

De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freezing-casting

A linear actuator is used to remove solid-state parts in low-temperature condition from the containers used as a mold for manufacturing parts using freeze-casting. The device allows pressure to be applied to the material to be removed, resulting in ejection. The displacement of the material is performed with controlled displacement speed, providing the achievement of defect-free materials. The system performing the ejection includes a source of compressed air, a pressure regulator filter coupled with a manometer, a directional valve, the linear actuator, a baton, a flow regulating valve, a fastening means, a metallic support and a chamber for receiving the cooled material.

System for demolding materials obtained by means of the freeze-casting technique

This invention provides a de-molding system of ceramic parts manufactured by freeze-casting comprising a mold (), wherein the mold () comprises an upper opening () and a lower opening (), wherein the upper opening () is adapted to receive a colloidal suspension (), and one of the openings is adapted to allow the passage of a manufactured ceramic part (), characterized by comprising at least one main de-molding element () adapted to actuate a ceramic part manufactured () through an opening in the mold (). In addition, the invention provides a mold cooling system for the manufacturing of ceramic parts by freeze-casting comprising: a source () of cooling gas; a cooling gas cooling medium () fluidically connected to the cooling gas source (); and a cooling cell (), fluidly connected to the cooling gas cooling medium (), comprising a mold () in its interior, wherein the cooling cell () comprises a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting comprising the stages of: refrigerating a cooling gas coming from a cooling gas source (); and injecting a cooling gas that is refrigerated in a cooling cell () comprising a mold () in its interior.

De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freeze-casting

Growing community of inventors

Nova Lima, Brazil

Wander Luiz Vasconcelos