The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2012
Filed:
Aug. 21, 2007
Yonghua Shang, Yantai, CN;
Zhongping Sun, Yantai, CN;
Jianfeng LI, Yantai, CN;
Yong Wang, Yantai, CN;
Weiqi Hua, Yantai, CN;
Deqiang MA, Yantai, CN;
Yongsheng Wang, Yantai, CN;
Jiansheng Ding, Yantai, CN;
Yonghua Shang, Yantai, CN;
Zhongping Sun, Yantai, CN;
Jianfeng Li, Yantai, CN;
Yong Wang, Yantai, CN;
Weiqi Hua, Yantai, CN;
Deqiang Ma, Yantai, CN;
Yongsheng Wang, Yantai, CN;
Jiansheng Ding, Yantai, CN;
Ningbo Wanhua Polyurethanes Co., Ltd., Ningbo, Zhejiang Province, CN;
Abstract
The present invention provides a flow duct type jet reactor and a process for preparing isocyanates using it. The flow duct type jet reactor situates flow ducts in inner feed pipe which form whirlpool and reinforce vortex, thereby amine steam rapidly admixes and reacts with phosgene, and the byproducts are reduced. In addition, the present process uses a jet-absorption apparatus which rapidly cools the high temperature gas discharged from the reactor to a temperature at which the product is thermally stable, and at the same time provides negative pressure for the reaction process of the system, and thus saving bulky vacuum system.