Abstract:
A process for the reversible storage of hydrogen, comprising bringing into contact a material that consists of magnesium elements and nitrogen elements with gaseous hydrogen leading to the formation of an amide or corresponding hydrides, comprises the use of a balanced system corresponding to the formula: Mg3N2
Abstract:
The present invention relates to a method of oligomerizing olefins M selectively to oligomers Mn, involving a catalytic system comprising at least one organometallic complex with a metal of groups 4 to 10 of the periodic table of molecular volume Vmo, and a micro- or mesoporous solid whose average micropore diameter Φ is greater than or equal to Φmin defined as a function of the molecular volume (Vmo+nVmM), where n is the number of monomeric olefins strung together upon obtaining the metallacycle intermediate and VmM the molecular volume of the monomeric olefin.
Abstract:
The present invention relates to a method of oligomerizing olefins M selectively to oligomers Mn, involving a catalytic system comprising at least one organometallic complex with a metal of groups 4 to 10 of the periodic table of molecular volume Vmo, and a micro- or mesoporous solid whose average micropore diameter Φ is greater than or equal to Φmin defined as a function of the molecular volume (Vmo+nVmM), where n is the number of monomeric olefins strung together upon obtaining the metallacycle intermediate and VmM the molecular volume of the monomeric olefin.
Abstract:
A method of preparing a composition of alcohol esters of linear monocarboxylic acids with 6 to 26 carbon atoms from a vegetable or animal oil, neutral or acid, virgin or recycled, with monoalcohols having 1 to 18 carbon atoms, in the presence of a catalyst of nitrogen-containing metallophosphate type.
Abstract:
A method of preparing a composition of alcohol esters of linear monocarboxylic acids with 6 to 26 carbon atoms from a vegetable or animal oil, neutral or acid, virgin or recycled, with monoalcohols having 1 to 18 carbon atoms, in the presence of a catalyst of nitrogen-containing metallophosphate type.
Abstract:
A process for the reversible storage of hydrogen, comprising bringing an alloy of alkaline metal and silicon into contact with gaseous hydrogen leading to the formation of the hydride or corresponding hydrides, comprises the use of at least one balanced system that corresponds to the formula: MXMSiMXMSiHn where M is selected from among Li, Na, or K and in which atomic ratios XM take on the following values: XLi=1
Abstract translation:一种用于氢的可逆储存的方法,包括使碱金属和硅的合金与导致氢化物或相应的氢化物形成的气态氢接触,包括使用对应于下式的至少一个平衡系统: ?in-line-formula description =“In-line Formulas”end =“lead”?> M SUB> SUB> 其中M选自Li,Na或K,其中原子比X M M取以下值:<?in-line-formula description =“In 线公式“end =”lead“?> X SUB> = 1 <?in-line-formula description =”In-line Formulas“end =”tail“?>
Abstract:
The invention concerns a catalyst for hydrorefining and hydroconverting hydrocarbon feeds, comprising a mixed sulphide comprising at least two elements selected from elements with an atomic number selected from the group formed by the following numbers: 3, 11, 12, 19 to 33, 37, to 51, 55 to 83, 87 to 103, characterized in that the mixed sulphide results from a combination of at least one element the sulphide of which has a bond energy between the metal and sulphur of less than 50.+-.3 kcal/mol (209.+-.12 kJ/mol) and at least one element the sulphide of which has a bond energy between the metal and sulphur of more than 50.+-.3 kcal/mol (209.+-.12 kJ/mol), the mixed sulphide thus having a mean bond energy between the metal and sulphur which is in the range 30 to 70 kcal/mol (125 to 293 kJ/mol).
Abstract:
A process for the reversible storage of hydrogen, comprising bringing an alloy of alkaline metal and silicon into contact with gaseous hydrogen leading to the formation of the hydride or corresponding hydrides, comprises the use of at least one balanced system that corresponds to the formula: MXMSi MXMSiHn where M is selected from among Li, Na, or K and in which atomic ratios XM take on the following values: XLi=1 1≦XNa≦3 1≦XK≦2 n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or formed hydrides. or to the formula MSiXSi MSiXSiH2XSi+1 where M is selected from among Li, Na, or K and in which the atomic ratio XSi=Si/M takes on a value of 1 to 4.
Abstract:
A process for the reversible storage of hydrogen, comprising bringing an alloy of alkaline metal and silicon into contact with gaseous hydrogen leading to the formation of the hydride or corresponding hydrides, comprises the use of at least one balanced system that corresponds to the formula: MXMSiMXMSiHn where M is selected from among Li, Na, or K and in which atomic ratios XM take on the following values: XLi=1 1≦XNa≦3 1≦XK≦2 n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or formed hydrides. or to the formula MSiXSiMSiXSiH2XSi+1 where M is selected from among Li, Na, or K and in which the atomic ratio XSi=Si/M takes on a value of 1 to 4.
Abstract:
A process for the reversible storage of hydrogen, comprising bringing into contact a material that consists of magnesium elements and nitrogen elements with gaseous hydrogen leading to the formation of an amide or corresponding hydrides, comprises the use of a balanced system corresponding to the formula: Mg3N2Mg(NH2)2+2MgHn where n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or hydrides formed. The material can also comprise, in a minor proportion, at least one transition metal of groups 3 to 12 of the periodic table that is selected from among Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn and Pd.