Patent ID: 11944939
Assignee: TOYOBO MC CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  D  Y | IPC B  C

Claim 0:
1. A hollow fiber membrane element, comprising:
a core tube comprising a side face having a plurality of pores;
a hollow fiber membrane group consisting of a plurality of hollow fiber membranes disposed around the core tube; and
resin walls securing the core tube and the hollow fiber membrane group at both ends,
the hollow fiber membrane element being a both open-ended type hollow fiber membrane element in which both ends of the core tube and the plurality of hollow fiber membranes are open,
the hollow fiber membrane group including a first hollow fiber membrane layer composed of a plurality of first hollow fiber membranes disposed so as to surround the core tube and a second hollow fiber membrane layer composed of a plurality of second hollow fiber membranes disposed so as to surround the first hollow fiber membrane layer,
a permeability coefficient of the plurality of first hollow fiber membranes being smaller than a permeability coefficient of the plurality of second hollow fiber membranes.