Hangzhou Singclean Medical Products Co., Ltd;Zhejiang University of Science and Technology
发明人:
Zhiguo Zhang,Wei Huang,Yange Suo
申请号：
US15607561
公开号：
US20180179301A1
申请日:
2017.05.29
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A method of preparing an oxidized starch haemostatic material, including adding a starch raw material to an external circulation pulsatile reactor； switching on a pump to allow inflow of dry air for drying the raw material； switching on a heat exchanger； vacuumizing the reactor； opening a nitrogen dioxide pipeline and a dry air pipeline； pumping in a mixed gas； controlling temperature at 0-120° C. by the heat exchanger； wherein nitrogen dioxide is contacted with the raw material to trigger a selective oxidation reaction and is continuously recycled； an airflow circulation switch is switched on and off at a pulsating ratio of 1:1-10 to carry out airflow pulsation； stopping inflow of nitrogen dioxide and continuing airflow circulation for 5-30 minutes； after completion of the reaction, adjusting to room temperature； vacuumizing the reactor and treating exhaust gas； allowing nitrogen gas to flow in for rinsing the replaced reactor until completion.
