PROCESS FOR PRODUCING IMMUNOGLOBLIN PREPARATION

A process for producing an immunogloblin preparation that includes heating of an immunogloblin solution and that is simplified and has reduced aggregates. In particular, the process comprises the step of heating an aqueous solution containing immunogloblin wherein the protein concentration is 3 (w/v)% or less in the presence of 10 (w/v)% or more of a stabilizer at a pH value of 5.2 ± 0.5 and at a conductivity of 0.01 to 1 mSi and the subsequent step of, at a pH value of 7 to 9 and a conductivity of 0.01 to 1 mSi, isoelectric focusing and/or anion exchanger treatment, optionally together with the step of filtration with the use of a porous membrane of 1 to 100 nm average pore diameter at a pH value adjusted to 6-7.