Abstract: A process for producing a soybean milk and soybean milk pack includes cooking ground soybeans with the use of superheated steam containing no or little oxygen, thus extracting soybean proteins to give a cooked bean juice of the soybeans; separating a solid soybean curd lees in the oxygen-free state without cooling the bean juice to give a soybean milk containing no or little dissolved oxygen and having soybean proteins suspended therein. The process also includes filling the thus produced soybean milk into pack containers in an oxygen-free environment with no or little dissolved oxygen without heating or cooling the soybean milk, sealing the containers, and then storing at 1 to 10° C.

Abstract: The caldron of the invention comprises a cylindrical caldron main body having a raw material charge port for charging a water-added raw material to be boiled and a discharge port for discharging a boiled raw material, both ports being disposed near to both the closed ends of the caldron main body and at least one steam injection pipe installed in the caldron main body and having a plurality of injection ports for injecting steam and preferably oxygen-free streams for boiling the raw material, wherein the injecting direction of the steam injected from the injection ports is inclined so that the steam is supplied in the circumferential direction of the caldron main body.