Search International and National Patent Collections

1. (WO2017147796) EGGSHELL RECYCLING METHOD AND A USE THEREOF

Pub. No.:    WO/2017/147796    International Application No.:    PCT/CN2016/075275
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Mar 03 00:59:59 CET 2016
IPC: B09B 3/00
B09B 5/00
Applicants: WORLD HOUSEWARE PRODUCING COMPANY LIMITED
世界家庭用具制品厂有限公司
Inventors: HO, Ka Yee
何嘉仪
LEE, Wai Man
李伟文
Title: EGGSHELL RECYCLING METHOD AND A USE THEREOF
Abstract:
An eggshell recycling method and a use thereof. The method comprises the following steps: (1) selecting and recycling eggshells having membranes, and washing and sterilizing to remove dirt and kill bacteria; (2) crushing the eggshells to increase the specific surface area; (3) performing enzymatic hydrolysis, wherein because the contact area of the crushed eggshells increases, the hydrolysis process can be accelerated such that the enzymatic hydrolysis duration is shortened; and liquid phase-like organic substances and unhydrolyzed inorganic substances are obtained after the hydrolysis; (4) performing solid-liquid phase separation on the substances obtained after hydrolysis; (5) taking the liquid phase substances, and drying to obtain eggshell membrane powder; and (6) taking the solid phase substances, and drying to obtain eggshell powder. The eggshell powder prepared by the method can be used for replacing a calcium carbonate polymer filter to prepare a thermoplastic. The beneficial effects of the method are that: 1. wastes can be recycled and reused to the maximum extent; 2. recycling can be performed without first separating eggshell membranes from eggshells; hydrolysis is performed by means of a enzymatic hydrolysis method, and organic substances therein would not be destroyed; and after the organic and inorganic portions are separately dried, substances having different uses are obtained.