| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549261000 | Double bond between ring members of the cyclic anhydride | 9 |
| 20100324309 | Novel Mixture and Compounds from Mycelia of Antrodia Camphorata and Use Thereof - The present invention relates to a compound derived from mycelium of | 12-23-2010 |
| 20110160466 | METHOD FOR PREPARING THE CITRACONIC ANHYDRIDE AND METHOD FOR ISOMERIZING/DEHYDRATING ITACONIC ACID - The disclosure provides a method for preparing the citraconic anhydride and a method for isomerizing/dehydrating itaconic acid. The method for preparing the citraconic anhydride includes the following steps: providing itaconic acid as a starting material; and subjecting the itaconic acid to an isomerization/dehydration reaction in the presence of a catalyst to obtain the citraconic anhydride, wherein the catalyst includes a heteropolyacid or heteropolyacid salt. | 06-30-2011 |
| 20130096323 | NOVEL MIXTURE AND COMPOUNDS FROM MYCELIA OF ANTRODIA CAMPHORATA AND USE THEREOF - The present invention relates to a compound derived from mycelium of | 04-18-2013 |
| 549262000 | Maleic anhydride per se | 6 |
| 20090143601 | METHOD FOR PREVENTING FUMARIC ACID DEPOSITS IN THE PRODUCTION OF MALEIC ACID ANHYDRIDE - The present invention provides a process for preventing fumaric acid deposits in the preparation of maleic anhydride, comprising the following steps: | 06-04-2009 |
| 20090306410 | SHAPED CATALYST BODY FOR PARTIAL OXIDATION REACTIONS - The invention relates to a shaped catalyst body for preparing maleic anhydride, which comprises mixed oxides of vanadium and of phosphorus as catalyst components. To develop a generic shaped catalyst body further so that it has improved properties, it is proposed that the basic geometric body enveloping the shaped catalyst body ( | 12-10-2009 |
| 20100113805 | PROCESS FOR OBTAINING MALEIC ANHYDRIDE BY DISTILLATION - What is described is a process for obtaining maleic anhydride by distillation from a solution of maleic anhydride in a high-boiling absorbent which has been obtained by gas phase oxidation of a hydrocarbon and at least partial absorption of the oxidation products into the absorbent, by
| 05-06-2010 |
| 20110021789 | PROCESS FOR SEPARATING OFF FUMARIC ACID AND OTHER MINOR COMPONENTS DURING THE PRODUCTION OF MALEIC ANHYDRIDE - A process for decreasing fumaric acid deposits in the preparation of maleic anhydride by heterogeneously catalyzed oxidation of a hydrocarbon with molecular oxygen, in which the maleic anhydride is absorbed from the crude product mixture in an absorbent in an absorption column and desorbed again in a desorption column, the entirety or a portion of the absorbent depleted in maleic anhydride, for controlled precipitation of fumaric acid, being cooled and/or concentrated by evaporating a portion of the absorbent to such an extent that the difference between the concentration of fumaric acid in the recycle stream at the outlet of the desorption column under the conditions existing there and the equilibrium concentration of fumaric acid according to the solubility curve after the cooling and/or evaporation of a portion of the absorbent is greater than or equal to 250 ppm by weight, and the fumaric acid precipitated as a solid is removed completely or partly from the absorbent recycling system and the fumaric acid-depleted absorbent is recycled completely or partly to the absorption column. | 01-27-2011 |
| 20130123517 | SILVER VANADIUM PHOSPHATES - The invention relates to novel silver vanadium phosphates, catalysts based on these silver vanadium phosphates and the use of these catalysts for carrying out organic reactions in the gas phase. | 05-16-2013 |
| 20130150594 | PROCESS FOR RECOVERY OF MALEIC ANHYDRIDE BY USING ORGANIC SOLVENT - A process for the recovery of maleic anhydride from the gas produced by the catalytic oxidation of hydrocarbon, n-butane or benzene, is characterized by:
| 06-13-2013 |
