The invention discloses a preparation method for
atropine sulfate. The preparation method comprises the following steps: 1) adding
dry powder of daturae flower into
hydrochloric acid with a concentration of 1 to 4% and a volume 0.5 to 1 time of the volume of the
dry powder for
wetting and swelling, then adding the swollen daturae flower
powder into a percolating
barrel, adding the
hydrochloric acid with a concentration of 1 to 4%, dipping the
powder for 24 h or above and carrying out percolating so as to obtain brown-yellow stiff paste; 2) dissolving brown-yellow stiff paste in
acetone, adding
active carbon, carrying out decoloring and filtering, adding acid drop by drop until a pH value is less than 7 and carrying out standing at
room temperature so as to obtain
hyoscyamine sulfate; and 3) spreading
hyoscyamine sulfate on a sample disc, putting the sample disc into a baking oven, carrying out heating for
racemization, then carrying out cooling to obtain a crude
atropine sulfate product, adding
ethanol, carrying out dissolving under stirring and then filtering, subjecting a filtrate to
crystallization overnight and then successively carrying out pressure-reduced filtering and
vacuum drying so as to obtain
atropine sulfate. According to the invention, the daturae flower is used as a
raw material;
acid water is used for
percolation and extraction; total alkali is obtained through
chloroform extraction;
sulfuric acid is added into an
acetone solution for salt forming so as to obtain
hyoscyamine sulfate, then heating is carried out for
racemization, and
ethanol recrystallization is carried out to obtain
atropine sulfate; and the method is simple in
process operation, small in
pollution, low in cost and suitable for industrial production.