Title:
PROCESS FOR MAKING MACRO POROUS CERAMIC SPHERES AND PRODUCTS MADE THEREFROM
Document Type and Number:
WIPO Patent Application WO2001039887
Kind Code:
A3
Abstract:
Process for making thermally stable macro porous spheres with or without central core cavity comprises steps of homogenizing dry pulverized talc, calcined talc, china clay, calcined clay, calcined alumina and magnesia, with or without burnable core particles and with <25 % combustibles; sprinkling over pan pelletizer wetted with PVA aqua sol binder and rolling to form spheres having <25 % moisture and dry compacting in pelletizer before oven drying at 90-110 deg. C. till moisture and core particles are partially destroyed and sintering under rotary motion of the spheres for 45-60 minutes at 1350 - 1380 deg. C. before being rapidly cooled down to ambient temperature and sieving and recovering therefrom >90 % loose fill macro porous spheres for use as catalyst and moulded bricks/monoliths forming refractory insulation applications.
Inventors:
VENKATESWARAN DORAISWAMI (IN)
VAJIFDAR PARVEZ (IN)
CURSETJI RUSTOM MINOCHER (IN)
CHATTERJEE ANJAN KUMAR (IN)
VAJIFDAR PARVEZ (IN)
CURSETJI RUSTOM MINOCHER (IN)
CHATTERJEE ANJAN KUMAR (IN)
Application Number:
PCT/IN2000/000117
Publication Date:
April 18, 2002
Filing Date:
December 01, 2000
Export Citation:
Assignee:
ASSOCIATED CEMENT COMPANIES LT (IN)
VENKATESWARAN DORAISWAMI (IN)
VAJIFDAR PARVEZ (IN)
CURSETJI RUSTOM MINOCHER (IN)
CHATTERJEE ANJAN KUMAR (IN)
VENKATESWARAN DORAISWAMI (IN)
VAJIFDAR PARVEZ (IN)
CURSETJI RUSTOM MINOCHER (IN)
CHATTERJEE ANJAN KUMAR (IN)
International Classes:
C04B38/00; (IPC1-7): C04B38/00
Foreign References:
| EP0318236A2 | 1989-05-31 | |||
| FR2598143A1 | 1987-11-06 | |||
| EP0314290A2 | 1989-05-03 | |||
| US4374044A | 1983-02-15 | |||
| US4867931A | 1989-09-19 |
Other References:
SAMPATHKUMAR N N ET AL: "Synthesis of alpha -cordierite (indialite) from flyash", MATER RES BULL;MATERIALS RESEARCH BULLETIN SEP 1995 PERGAMON PRESS INC, TARRYTOWN, NY, USA, vol. 30, no. 9, September 1995 (1995-09-01), pages 1107 - 1114, XP004067052
DATABASE WPI Section Ch Week 200030, Derwent World Patents Index; Class L02, AN 2000-348738, XP002167508
DATABASE WPI Section Ch Week 200030, Derwent World Patents Index; Class L02, AN 2000-348738, XP002167508
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