33 results about "4-Heptanone" patented technology

Methods, systems and catalysts for converting an alcohol containing feedstock to an upgraded material in a single catalyst bed wherein a feedstock is fed to a catalyst under preselected conditions to obtain an intermediate; and condensing the intermediate through an aldol condensation reaction to yield a product containing an upgraded material. In one instance the feedstock includes ethanol, the catalyst is a mixed metal oxide catalyst and the upgraded material is typically a C.sub.5+ ketone(s) or alcohol(s), such as 2-pentanone, 2-heptanone, 4-heptanone and 2-nonanone.

The present invention relates to a preparation method of 7A-double-condensed pyrrolidin-acetonitrile, which uses gamma-butyrolactone raw material to prepare 7A-double-condensed pyrrole through affinity substitution reaction, acidolysis ring-closure reaction and affinity addition decarboxylation reaction Pyridine-acetonitrile, which is characterized in that the transition intermediate CMP-1 is separated and purified to replace 1,7-dichloro-4-heptanone to provide the carbon chain constructed by the mother nucleus. The purification is simple, the yield is high, and the intermediate is stable and easy to store and transfer . The inorganic ammonium salt ammonium acetate is used as the ammonia source to replace the large-scale ammonia gas used in the traditional process, and a high-purity (GC>99%) product is produced under relatively mild conditions. It avoids the shortcomings of the traditional process such as high energy consumption (low temperature freezing reaction), long time consumption, and low product quality (rectification is required, and the product purity is between 98‑99%). The raw materials of each step in the production process are cheap and easy to obtain, no toxic organic solvents are used, the post-treatment is simple, the "three wastes" are less in the production process, and it is green and environmentally friendly.