Cashew has high economic values. Almost all the part of this plant are useful.
However, the chasew nut is the most important part and the cashew apples is just eaten or
used for syrup. The extraction of tannin from cashew apples can increase the economic value
of cashew apples.The objectives of this research were obtained tannin and to seek the
process and operation condition of extraction of tannin from cashew apples. The experiment
was carried out in a stirred reactor equipped with condenser and mantel heater.Cashew apples
was in slab form. 250 ml aceton and 60 gram chasew apples add to the ractor. Samples was
drawn at ceratin times and the tannin concentration was measured by gravimetriv method
The results showed that increasing extraction temperature and stirrer velocity caused
increase the tranfer mass(Kc) and diffusivity (De) coefficients . The value of Kc and De are
from 0.2322 gr / cm
2
.min until 1.2678 gr /cm
2
.min and from 0.031 cm
2
/min until 0.079 cm
2
/min
for the range of stirrer velocity 500 - 800 rpm. The value of Kc and De are from 3.305 gr /
cm
2
.min until 8.021 gr /cm
2
.min and from 0.408999 cm
2
/min until 0.6678 cm
2
/min for
extraction temperature range 35
0
C until 50
0
C.
Keywords : extract, tannin, cashewappl
