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Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2011 by Universidad Católica de Valparaíso -- Chile
Vol. 14 No. 3, Issue of May 15, 2011
 

Table 2. 24 factorial designs for boric acid production from colemanite by chemical laching.



Variables

Low level (-)

Base level

High level (+)

Pulp density (wt, %)

5

10

15

Oxalic acid concentration (M)

0.10

0.15

0.20

Temperature (ºC)

30

55

80

Leaching time (min)

60

90

120