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:
Jul. 14, 2015
Filed:
Jun. 27, 2013
Applicant:
Sogang University Research Foundation, Seoul, KR;
Inventors:
Nam Hwi Hur, Seoul, KR;
Byeong No Lee, Yongin-si, KR;
Assignee:
Sogang University Research Foundation, Seoul, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 51/15 (2006.01); C07C 281/02 (2006.01);
U.S. Cl.
CPC ...
C07C 281/02 (2013.01);
Abstract
The present disclosure relates to a method of preparing powder of a solid carbazic acid derivative, which involves inducing a reaction of a liquid hydrazine derivative with carbon dioxide at a high pressure of from about 0.5 MPa to about 100 MPa. During the reaction, the pressure may range from about 0.5 MPa to about 100 MPa. In this regard, although the reaction of the carbon dioxide with the liquid hydrazine derivative occurs when the pressure is adjusted to below than about 0.5 MPa, sticky precipitates in a form of gel are gradually produced but the powder is not produced.