Abstract:
PROBLEM TO BE SOLVED: To eliminate the adverse effects of peroxides generated at the cathode of a fuel cell. SOLUTION: The fuel cell 1 has two electrodes 2 and an ion-exchange membrane 6, with each of the electrodes 2 having an electrode catalyst layer 4 and at least one gas passage for a reaction gas 7. The fuel cell contains at least one kind of additive that works to prevent formation of peroxides and/or decompose peroxides. A method is disclosed for using at least one kind of additive inside or over the electrode 2 of the fuel cell 1 having the ion- exchange membrane 6, the electrode catalyst layer 4, and the electrode 2 having at least one gas flow passage for the reaction gas 7. The at least one kind of additive works to prevent formation of and/or decompose peroxides inside or over the electrode 2.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing glyoxal diacetal that uses a water- miscible alcohol and permits the continuous operation in high yield. SOLUTION: The reaction of 40-75 wt.% of glyoxal aqueous solution with a monohydric alcohol is carried out in the presence of an acid catalyst to produce a glyoxal diacetal. In this case, a liquid mixture including the alcohol and glyoxal in at least 15:1 molar ratio and water in an amount of ≤8 wt.% at the start of the reaction is brought into contact with an acid catalyst so that the alcohol used may not be distilled off over 5 wt.% until the concentration of the diacetal formed in the reaction mixture attains at least 70% of the equilibrium concentration. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel cell operable at 950 deg.C or less. SOLUTION: This fuel cell contains a cathode, an anode, and an electrolyte, and the cathode contains a material represented by the composition formula (Sr1-x Cax )1-y Ay Mn1-z Bz O3-δ . (In the formula, A represents at least one element selected from a group comprising Ba, Pb, Na, K, Y, and La; B represents at least one element selected from a group comprising Mg, Al, Ga, In, Sn, and elements of the subgroup 4, the subgroup 5, and the subgroup 6 in the periodic table of the elements; x is represents a value of 0.2-0.8; y represents a value of 0-0.4; z represents a value of 0 to less than 1, and δ represents a value necessary for satisfying the principle of electrical neutrality.) The fuel cell operating at moderate temperature is provided.
Abstract:
PROBLEM TO BE SOLVED: To substantially promote cost performance and efficiency of a current fuel cell by providing a proper transportation means and separator means of gas. SOLUTION: In the case where a fuel cell comprises at least following elements; a) each of two electrode comprising at least one gas flow channels for reaction gas and b) a liquid electrolyte, each of the gas flow channel of each electrode has at least one inlet and is vertically extended for a movement direction of ion under specified electric charge according to the arrangement of electrode.
Abstract:
PROBLEM TO BE SOLVED: To achieve optimum supporting of a catalyst in an electrode of a polymer-electrolyte membrane fuel cell. SOLUTION: The membrane electrode assembly comprises a polymer-electrolyte membrane with reaction layers applied to both sides and possibly with gas distribution layers. At least one of the reaction layers includes at least one catalytic component and an electron conductor. The method for manufacturing the membrane electrode assembly comprises (A) introduction of ions of the at least one catalytic component into the polymer-electrolyte membrane and/or into an ionomer introduced into the reaction layers, (B) application of the electron conductor to both sides of the polymer-electrolyte membrane, (C) electrochemical deposition of the ions of the catalytic component from the polymer-electrolyte membrane and/or from the ionomer, introduced into the reaction layers, on the electron conductor onto at least one side of the polymer-electrolyte membrane. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
The invention relates to an improved method for producing D-pantothenic acid and/or salts thereof and to the use thereof as an additive for animal feed.
Abstract:
A method for producing alcoxylated carbonyl compounds of general formula (I) (compounds I): R aR C(OR )b wherein R , R represent hydrogen or C1- C6-alkyl, R independently means C1- C6-alkyl, a is 0 or 1, b 2 or 3 with the proviso that the sum of a and b is 3, by means of anodic oxidation of germinal dialcoxy compounds of general formula (II) (compounds II) wherein R , R , R , R represent hydrogen or C1- C6-alkyl, R , R represent C1- C6-alkyl or C1- C6-alcoxy, in the presence of a C1-C6-alkyl alcohol (compounds III).A usual compound (compound IV) is used as a cathodic depolarizer suitable for electrochemical oxidation. The anodic oxidation and cathodic reduction is carried out in an undivided electrolyte cell in the presence of C1-C6-alkyl alcohols.
Abstract:
The invention relates to a method for producing orthocarbonic acid trialkyl esters by electrochemical oxidation of alpha-beta-diketones or alpha-beta-hydroxy ketones in the presence of C1-to C4-alcohols (alcohol A), the keto function being present in the form of a ketal function derived from C1- to C4-alykl alcohols and the hydroxyl function being optionally in the form of an ether function derived from C1- to C4-alykl alcohols (ketal K). The molar ratio of the ketal K to the alcohols A in the electrolytes is 0.2:1 to 10:1.
Abstract:
The invention relates to an improved method for producing D-pantothenic acid and/or salts thereof and to the use thereof as an additive for animal feed.
Abstract:
The invention relates to an improved method for producing D-pantothenic acid and/or salts thereof and to the use thereof as an additive for animal feed.