Patent ID: 11926608
Assignee: NANJING QUANKAI RESEARCH INSTITUTE OF BIOMATERIALS CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 1:
2. The synthesis device for rapidly producing lactide at high yield according to claim 1, wherein the oligomer preparation system (I) comprises an oligomerization reactor (6), a raw material pump (2), an oligomerization catalyst feeding pump (4), a raw material mixer (5), an oligomerization discharging/circulating pump (7), a rectifying tower (11), and a condenser (12);
wherein, a lactic acid raw material (1) and an oligomerization catalyst (3) respectively enter the raw material mixer (5) through the raw material pump (2) and the oligomerization catalyst feeding pump (4) for mixing at the same time, and then the mixture is fed from a side face of the oligomerization reactor (6);
the oligomerization discharging/circulating pump (7) is located on a discharging pipe at a bottom of the oligomerization reactor (6), and is connected with a feeding pipe of the oligomer purification system (II) and a side line feeding port of the oligomerization reactor (6) through a three-way valve;
a feeding pipe of the rectifying tower (11) is connected with a top of the oligomerization reactor (6), a discharging pipe at a top of the rectifying tower (11) is connected with a condensate storage tank (14) after passing through the condenser (12), and a side face of the condensate storage tank (14) is connected with an oligomerization vacuum system (13); and a discharging pipe of the condensate storage tank (14) is provided with a condensate circulating/discharging pump (15), which is connected to a side line feeding pipe of the rectifying tower (11) through a three-way valve.