The present invention relates to a method for the production of molecules with seven carbons constituted by a chain of four carbons with three methyl branches, primarily triptane (2,2,3-trimethylbutane), by alcohol coupling reaction (Guerbet reaction), resulting in an alcohol with a four-carbon chain with three methyl branches, which is transformed into triptane. The importance of this method stems from the fact that triptane is the hydrocarbon with the greatest capacity to resist compression without ignition and can be used in unleaded aviation gasolines and in the formulation of high-octane automotive gasolines.

The process for synthesizing heterogeneous sulfur-free catalysts based on molybdenum oxide, as well as their use in biomass transformation processes, constitutes the central part of this invention. These materials were shown to be active and selective in three biomass transformation processes of industrial importance, namely: (i) hydrodeoxygenation of fatty acids, (ii) hydrogenation and (iii) dehydrogenation of terpenes. The synthesis conditions of these catalysts allow to obtain 100% conversion of fatty acids and the production of linear hydrocarbons without oxygen in their structure above 95%. The products generated using the heterogeneous catalysts of this invention have great relevance in various industries such as energy, chemicals, oil, among others. The operating conditions of these catalysts were also optimized to achieve their application in the most favorable conditions, reducing reaction time, temperature and pressure. The versatility of these materials, their simple handling, the use of inexpensive metals and in small quantities facilitate their use in large-scale industrial processes.

Paraffin compositions including mainly even carbon number paraffins, and a method for manufacturing the same, is disclosed herein. In one embodiment, the method involves contacting naturally occurring fatty acid/glycerides with hydrogen in a slurry bubble column reactor containing bimetallic catalysts with equivalent particle diameters from about 10 to about 400 micron. The even carbon number compositions are particularly useful as phase change material.

Process for the rejuvenation of a catalyst comprising a metal from group VIII, a metal from group VIb and an oxide support not comprising zeolite, comprising the following stages: a) said catalyst is regenerated at a temperature of between 360 C. and less than 420 C. so as to obtain a regenerated catalyst comprising a certain content of carbon and sulfur and a proportion of crystalline phase determined by X-ray diffraction and characterized by a ratio of less than 0.6, b) said regenerated catalyst is brought into contact with an aqueous solution consisting of water, of phosphoric acid and of an organic acid having each acidity constant pK.sub.a greater than 1.5, c) drying is carried out at a temperature of less than 200 C.

Paraffin compositions including mainly even carbon number paraffins, and a method for manufacturing the same, is disclosed herein. In one embodiment, the method involves contacting naturally occurring fatty acid/glycerides with hydrogen in a slurry bubble column reactor containing bimetallic catalysts with equivalent particle diameters from about 10 to about 400 micron. The even carbon number compositions are particularly useful as phase change material.