Patent ID: 8664152

Claim:
A method for producing porous crosslinked cellulose particles comprising the steps of: adding continuously dropwise or adding dividedly, to a suspension liquid of non-crosslinked spherical cellulose particles having a sphericity of from approximately 0.8 to approximately 1.0, a crosslinking agent in an amount of from 4 to 12 times an amount of a cellulose monomer in terms of moles and an alkali in an amount of from 0.1 to 1.5 times the amount of the crosslinking agent in terms of moles, in the presence of at least one inorganic salt selected from the group consisting of a hydrochloride, a sulfate, a phosphate and a borate, in an amount of from 6 to 20 times the amount of the cellulose monomer in terms of moles, over 3 hours or more, and producing crosslinked cellulose particles.