The disclosure provides methods for the production of liquefied petroleum gas from sustainable feedstocks, including methods comprising conversion of alcohols produced by gas fermentation for the production of propane and/or butane.

A propane production method includes a hydrogenation reaction step of hydrogenation-reacting crude propylene and hydrogen in a presence of a catalyst to obtain gaseous crude propane containing impurities; and an impurity removal step of removing the impurities contained in the gaseous crude propane obtained in the hydrogenation reaction step to obtain purified propane. The impurity removal step includes an adsorptive removal stage of adsorbing and removing water, ethane and propylene contained as impurities in the gaseous crude propane by adsorption treatment in which the gaseous crude propane is brought into contact with an adsorbent, and a separation removal stage of separating and removing hydrogen, oxygen, nitrogen and methane contained as impurities in the crude propane after the adsorption treatment by partial condensation or distillation of crude propane after the adsorption treatment in the adsorptive removal stage.

A propane production method includes a hydrogenation reaction step of hydrogenation-reacting crude propylene and hydrogen in a presence of a catalyst to obtain gaseous crude propane containing impurities; and an impurity removal step of removing the impurities contained in the gaseous crude propane obtained in the hydrogenation reaction step to obtain purified propane. The impurity removal step includes an adsorptive removal stage of adsorbing and removing water, ethane and propylene contained as impurities in the gaseous crude propane by adsorption treatment in which the gaseous crude propane is brought into contact with an adsorbent, and a separation removal stage of separating and removing hydrogen, oxygen, nitrogen and methane contained as impurities in the crude propane after the adsorption treatment by partial condensation or distillation of crude propane after the adsorption treatment in the adsorptive removal stage.

A propane production method includes a hydrogenation reaction step of hydrogenation-reacting crude propylene and hydrogen in a presence of a catalyst to obtain gaseous crude propane containing impurities; and an impurity removal step of removing the impurities contained in the gaseous crude propane obtained in the hydrogenation reaction step to obtain purified propane. The impurity removal step includes an adsorptive removal stage of adsorbing and removing water, ethane and propylene contained as impurities in the gaseous crude propane by adsorption treatment in which the gaseous crude propane is brought into contact with an adsorbent, and a separation removal stage of separating and removing hydrogen, oxygen, nitrogen and methane contained as impurities in the crude propane after the adsorption treatment by partial condensation or distillation of crude propane after the adsorption treatment in the adsorptive removal stage.

The invention relates to a method for preparing a cosmetic composition comprising the preparation of isododecane of natural origin and the mixture of isododecane formed with at least one compound selected from among: waxes, oils, film-forming agents, dyes and mixtures thereof. The invention also relates to the resulting cosmetic composition.

The invention relates to a method for preparing a cosmetic composition comprising the preparation of isododecane of natural origin and the mixture of isododecane formed with at least one compound selected from among: waxes, oils, film-forming agents, dyes and mixtures thereof. The invention also relates to the resulting cosmetic composition.

The disclosure provides use of an efficient, recyclable, green and friendly catalyst to realize a method of hydrogenation of an unsaturated alkene, and a method for preparing biodiesel through the transesterification of soybean oil with ethanol. The method of hydrogenation of the unsaturated alkene comprises performing a hydrogenation reaction of an unsaturated alkene at ambient temperature and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst I, and using n-hexane and water as a solvent, to obtain a corresponding saturated alkane. The method for preparing biodiesel through transesterification of soybean oil with ethanol comprises performing a transesterification reaction of soybean oil with ethanol at a temperature of 25-90° C. and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst II, to obtain the biodiesel.

The disclosure provides use of an efficient, recyclable, green and friendly catalyst to realize a method of hydrogenation of an unsaturated alkene, and a method for preparing biodiesel through the transesterification of soybean oil with ethanol. The method of hydrogenation of the unsaturated alkene comprises performing a hydrogenation reaction of an unsaturated alkene at ambient temperature and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst I, and using n-hexane and water as a solvent, to obtain a corresponding saturated alkane. The method for preparing biodiesel through transesterification of soybean oil with ethanol comprises performing a transesterification reaction of soybean oil with ethanol at a temperature of 25-90° C. and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst II, to obtain the biodiesel.

The disclosure provides use of an efficient, recyclable, green and friendly catalyst to realize a method of hydrogenation of an unsaturated alkene, and a method for preparing biodiesel through the transesterification of soybean oil with ethanol. The method of hydrogenation of the unsaturated alkene comprises performing a hydrogenation reaction of an unsaturated alkene at ambient temperature and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst I, and using n-hexane and water as a solvent, to obtain a corresponding saturated alkane. The method for preparing biodiesel through transesterification of soybean oil with ethanol comprises performing a transesterification reaction of soybean oil with ethanol at a temperature of 25-90° C. and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst II, to obtain the biodiesel.

A process is presented for the control of the exotherm from an oligomerization process. The oligomerization process is for the conversion of C3 and C4 olefins to distillate. The process includes controlling the extent of the reaction to limit temperature rise, and recycle of a portion of the reactor effluent stream for dilution of the C3 and C4 olefins passed to the oligomerization reactors, and for separating out the product distillate.