APPLEWHITE RICHARD JONATHAN,MORRISON JAMES DAVID,NEWTON MAURICE SYDNEY,RHODES NIGEL PETER,RICKARD CHRISTOPHER JOHN
申请号：
IN1900/CHENP/2012
公开号：
IN2012CN01900A
申请日:
2012.02.29
申请国别(地区):
IN
年份:
2013
代理人:
摘要：
There is provided a method of producing a mixed metal compound comprising at least Mg2t and at least Fe3 having an aluminium content of less than 10000 ppm, having an average crystal size of less than 20nm (200A) comprising the steps of: (a) combining a Mg2t salt and a Fe3 salt with Na2C03 and NaOH to produce a slurry, wherein the pH of the slurry is maintained at from 9 5 to 1 1, and wherein the Na2C03 is provided at an excess of 0 to 4,0 moles than is required to complete the reaction (b) subjecting the slurry to mixing under conditions providing a power per unit volume of 0 03 to 1 ,6kW/m3 (c) separating the mixed metal compound from the slurry, to obtain a crude product having a dry solid content of at least 10 wt% (d) drying the crude product either by (i) heating the crude product to a temperature of no greater than 150�C and sufficient to provide a water evaporation rate of 0,05 to 1 5 kg water per hour per kg of dry product, or (H) exposing the crude product to rapid drying at a water evaporation rate of 500 to 50000 kg water per hour per kg of dry product.
