BRPI0701585A2 - process of obtaining low density porous ceramics with controlled closed and open porosities - Google Patents

process of obtaining low density porous ceramics with controlled closed and open porosities

Info

Publication number
BRPI0701585A2
BRPI0701585A2 BRPI0701585A BRPI0701585A2 BR PI0701585 A2 BRPI0701585 A2 BR PI0701585A2 BR PI0701585 A BRPI0701585 A BR PI0701585A BR PI0701585 A2 BRPI0701585 A2 BR PI0701585A2
Authority
BR
Brazil
Prior art keywords
closed
low density
open
ceramic
controlled
Prior art date
Application number
Other languages
Portuguese (pt)
Inventor
Jamil Duailibi Jr
Original Assignee
Inst Nac De Tecnologia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inst Nac De Tecnologia filed Critical Inst Nac De Tecnologia
Priority to BRPI0701585 priority Critical patent/BRPI0701585A2/en
Publication of BRPI0701585A2 publication Critical patent/BRPI0701585A2/en

Links

Landscapes

  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

PROCESSO DE OBTENÇçO DE CERAMICAS POROSAS DE BAIXA DENSIDADE COM POROSIDADES FECHADA E ABERTA CONTROLADAS. A presente invenção diz respeito a um processo de obtenção de cornos cerâmicos porosos com porosidade fechada e aberta controladas, visando aplicações onde à baixa densidade, obtida pela alta concentração de poros fechados - característica também importante para a isolação térmica a baixas e altas temperaturas -, aliada à obtenção de uma distribuição de tamanho dos poros abertos controlada, constituem-se em parâmetros importantes para a absorção seletiva de óleos em água. De acordo com a presente invenção são produzidos corpos cerâmicos com porosidade fechada que lhes conferem densidades aparentes da ordem de 0,7 g/cm3, ou inferiores dependendo da quantidade de agentes formadores de poros adicionados, e porosidade aberta com diâmetro de poros na faixa entre 0,5 j~.m a 5,Oj.im (micro-metros) que, pelo efeito de capilaridade, leva à absorção seletiva de óleo quando misturados com água, sendo indicados para despoluir rios e mares nos eventos de derrame de petróleo. Dependendo do material de base utilizado e da quantidade de amido adicionada, o processo também leva à obtenção de corpos cerâmicos com alta porosidade fechada e baixa densidade, adequados para uso como materiais isolantes térmicos para altas temperaturas. Os corpos cerâmicos são obtidos pelos processos convencionais de conformação (extrusão, colagem de suspensões, "gel casting" e prensagem semi- plástica), de acordo com a aplicação a que se destinam. Para a obtenção de materiais cerâmicos porosos a serem utilizados para a absorção de petróleo, a extrusão mostrasse como a rota de processamento mais adequada.LOW DENSITY PORTABLE CERAMIC PROCESSING PROCESS WITH CLOSED AND OPEN CONTROLLED POROSITIES. The present invention relates to a process of obtaining controlled closed and open porous porous ceramic horns for applications where the low density obtained by the high concentration of closed pores - characteristic also for thermal insulation at low and high temperatures -, Allied to the achievement of a controlled open pore size distribution, they constitute important parameters for the selective absorption of oils in water. In accordance with the present invention closed porosity ceramic bodies are produced which give them apparent densities of the order of 0.7 g / cm3 or less depending on the amount of pore forming agents added and pore diameter open porosity in the range between 0.5 æm 5, Oj.im (micro-meters) which, due to the effect of capillarity, leads to selective oil absorption when mixed with water, being indicated to depollate rivers and seas in oil spill events. Depending on the base material used and the amount of starch added, the process also leads to the obtainment of low density high closed porosity ceramic bodies suitable for use as thermal insulating materials for high temperatures. Ceramic bodies are obtained by conventional forming processes (extrusion, suspension bonding, gel casting and semi-plastic pressing) according to their intended application. To obtain porous ceramic materials to be used for oil absorption, extrusion proved to be the most suitable processing route.

BRPI0701585 2007-03-26 2007-03-26 process of obtaining low density porous ceramics with controlled closed and open porosities BRPI0701585A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BRPI0701585 BRPI0701585A2 (en) 2007-03-26 2007-03-26 process of obtaining low density porous ceramics with controlled closed and open porosities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BRPI0701585 BRPI0701585A2 (en) 2007-03-26 2007-03-26 process of obtaining low density porous ceramics with controlled closed and open porosities

Publications (1)

Publication Number Publication Date
BRPI0701585A2 true BRPI0701585A2 (en) 2008-11-11

Family

ID=40527280

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0701585 BRPI0701585A2 (en) 2007-03-26 2007-03-26 process of obtaining low density porous ceramics with controlled closed and open porosities

Country Status (1)

Country Link
BR (1) BRPI0701585A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012006707A3 (en) * 2010-07-14 2012-03-15 Universidade Federal De Minas Gerais - Ufmg Method for preparing, using and recovering absorbent material for apolar compounds or mixtures
US9701880B2 (en) 2010-07-14 2017-07-11 Universidade Federal De Minas Gerais-Ufmg Process for preparing absorbent material for apolar compounds or mixtures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012006707A3 (en) * 2010-07-14 2012-03-15 Universidade Federal De Minas Gerais - Ufmg Method for preparing, using and recovering absorbent material for apolar compounds or mixtures
US9701880B2 (en) 2010-07-14 2017-07-11 Universidade Federal De Minas Gerais-Ufmg Process for preparing absorbent material for apolar compounds or mixtures

Similar Documents

Publication Publication Date Title
BRPI0511309A (en) porous organic / inorganic composite film and electrochemical device using the same
BRPI0518118A (en) organic / inorganic composite micro-porous membrane, manufacturing method, and electrochemical device prepared with such membrane
Kate et al. A simple method to estimate complete pore size distribution of rocks
Pham et al. Effects of carbonation on the microstructure of cement materials: influence of measuring methods and of types of cement
DE69219601D1 (en) A porous membrane suitable for determining a component contained in a biological fluid
CL2007000664A1 (en) Procedure for obtaining a thermostable composition of dry protein and anhydrous liquid alcohol by premixing the anhydrous liquid fraction, separately premixing the dry fraction and mixing obtaining a homogeneous mass keeping the temperature of the mixture below the temperature of the composition hardening.
DE502004011071D1 (en) METHOD FOR PRODUCING POROESEM, CARBON-BASED MATERIAL
BRPI0507139A (en) porous cellulose aggregate, process for producing the same, and molded product composition
Razak et al. Effect of porosity and water absorption on compressive strength of fly ash based geopolymer and OPC Paste
Dong et al. Workability and mechanical property of metakaolin phosphate acid based geopolymer
BRPI0701585A2 (en) process of obtaining low density porous ceramics with controlled closed and open porosities
Villani et al. Characterizing the pore structure of carbonated natural wollastonite
ES2119291T3 (en) POROUS CERAMIC MATERIAL AND PROCEDURE FOR ITS PREPARATION AND VALVE UNIT.
BRPI0418190A (en) porous bodies, method for the preparation of porous bodies, and solutions or dispersions
Lu et al. The waterproofing characteristics of polymer sodium carboxymethyl-cellulose
Shi et al. Determination of gas permeability of high performance concrete containing fly ash
BR9902640A (en) Process for the manufacture of ceramic layers, diffusion limiting, as well as the use of these layers
Gigova Investigation of the porous structure of battery separators using various porometric methods
Szafran et al. Effect of the bonding ceramic material on the size of pores in porous ceramic materials
Tang et al. A preliminary study on sorption, diffusion and degradation of mustard (HD) in cement
CN109081703A (en) A kind of preparation method of decoration of exterior wall rock beam not easy to fade
KR880000453B1 (en) Process for the preparation of non bubble chalk
Pham Modifications on microporosity and physical properties of cement mortar caused by carbonation: comparison of experimental methods
CN106669460B (en) A kind of polytetrafluoroethylene ultrafine fiber tubular membrane
Ma et al. Influencing factors on the interface microhardness of lightweight aggregate concrete consisting of glazed hollow bead

Legal Events

Date Code Title Description
B03A Publication of an application: publication of a patent application or of a certificate of addition of invention
B07A Technical examination (opinion): publication of technical examination (opinion)
B09B Decision: refusal

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O(S) ARTIGO(S) DA LPI

B09B Decision: refusal

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.