d) charging an initial charge amount of said acrylic acid to a vessel, with said initial charge amount being a portion of an entire amount of raw acrylic acid to be supplied to said batch reaction, with said portion of raw acrylic acid and a residual amount of raw acryiic acid being equal to said {HEAD ~ entire amount} of {TAIL ~ raw acrylic acid} to be supplied to the batch reaction; then 
of
d ) charging an initial charge amount of said acrylic acid to a vessel , with said initial charge amount being a portion of an entire amount of raw acrylic acid to be supplied to said batch reaction , with said portion of raw acrylic acid and a residual amount of raw acryiic acid being equal to said { HEAD ~ entire amount } of { TAIL ~ raw acrylic acid } to be supplied to the batch reaction ; then
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH