Class / Patent application number | Description | Number of patent applications / Date published |
558480000 | Nitrate esters or chalcogen analogues thereof (i.e., compounds having (X=)N(=X)-X- bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon; the X's may be the same or diverse chalcogens) | 6 |
20150031909 | SAFE METHOD FOR PRODUCING ALKYL NITRATE - The present invention provides a method for producing alkyl nitrate. The centrifugal extraction equipment acts as the esterification separator; a mixed acid solution containing sulfuric acid and nitric acid enters from the heavy phase inlet of the centrifugal extraction equipment; alkyl alcohol enters from the light phase inlet of the centrifugal extraction equipment; the feeding molar ratio of alkyl alcohol and nitric acid equals to 1:1.0-3.0; esterification reaction occurs with the mixed acid and alkyl alcohol at a temperature of 10˜60° C. under the rotating speed of 800-2000 r/min; under the action of centrifugal force, the generated coarse ester as a light phase and the spent acid as a heavy phase are separated; coarse ester as a light phase is discharged through the light-phase outlet of the centrifugal extractor; the spent acid as a heavy phase is discharged through the heavy-phase outlet of the centrifugal extractor; after alkali washing and water washing conventionally, coarse ester is dehydrated for drying and purified, then the refining products of alkyl nitrate is obtained. In the method of the present invention, esterification reaction, the separation of reaction products and the spent acid are finished in the same reactor simultaneously, which reduces the contact time of reaction products with the spent acid greatly, avoids the side reaction effectively, and ensures the safety of esterification process. | 01-29-2015 |
558482000 | Benzene ring containing | 1 |
20110034719 | PROCESS FOR THE PREPARATION OF (S)- NAPROXEN 4-NITROOXYBUTYL ESTER - The present invention relates to a new process for the preparation of the (S)-naproxen 4-nitrooxybutyl ester and to new intermediates obtained and used therein. The invention further relates to the use of the new intermediates for the manufacturing of pharmaceutically active compounds such as (S)-naproxen 4-nitrooxybutyl ester. The invention also relates to the use of (S)-naproxen 4-nitrooxybutyl ester prepared according to the process of the present invention for the manufacturing of a medicament for the treatment of pain. | 02-10-2011 |
558483000 | Additional nitrogen or chalcogen containing | 4 |
20080293961 | PROCESS FOR THE PURIFICATION OF 1,4-BUTANEDIOL MONONITRATE - A process for the purification of | 11-27-2008 |
20110034720 | FORMATION OF NITRATE ESTERS IN MICROREACTORS AND MILLIREACTORS USING A CONTINUOUS PRODUCT EXTRACTION IN A TURBULENT FLOW REGIME - A process for the continuous production of a compound of Formula (II), HO—R | 02-10-2011 |
20120130115 | METHODS OF PRODUCING NITRATE ESTERS - Methods of forming a nitrate ester include combining at least one nitrate salt and sulfuric acid to form a nitrating solution and adding an aliphatic polyol to the nitrating solution. Nitrate esters formed by this method may be, for example, triethylene glycol dinitrate (TEGDN), pentaerythritol tetranitrate (PETN), diglycerol tetranitrate (DGTN), 1,1,1-tris(methylol)ethane trinitrate (TMETN), 1,2,4-butanetriol trinitrate (BTTN), nitroglycerin (NG), diethylene glycol dinitrate (DEGDN), ethylene glycol dinitrate (EGDN), metriol trinitrate (MTN), nitrocellulose (NC), or 1,2-propanediol dinitrate (PDDN). | 05-24-2012 |
558484000 | Plural (X=)N(=X)-X- groups containing | 1 |
558485000 | Four or more (X=)N(=X)-X- groups containing | 1 |
20120108838 | SYNTHESIS OF AN ENERGETIC NITRATE ESTER - Preparation of an energetic nitrate ester compound and related intermediates is provided. | 05-03-2012 |