摘要:
Disclosed is a method of a gas-phase catalytic oxidation reaction of propylene, isobutylene, or tertiary butanol with molecular oxygen in the presence of a catalyst to produce a corresponding unsaturated aldehyde and a corresponding unsaturated carboxylic acid, in which the catalyst can be used over a long period of time. Concretely, in the presence of the catalyst containing a complex oxide including molybdenum, bismuth and iron as essential components, at least one factor of a reaction pressure and a molar ratio of molecular oxygen to a raw material is controlled to change in such a way that a rate of reaction of the raw material is kept constant in the temperature range of from (TA−15)° C. to TA° C., when a boundary temperature of the activation energy of the catalyst is set to be TA° C.
摘要:
Disclosed is a method of a gas-phase catalytic oxidation reaction of propylene, isobutylene, or tertiary butanol with molecular oxygen in the presence of a catalyst to produce a corresponding unsaturated aldehyde and a corresponding unsaturated carboxylic acid, in which the catalyst can be used over a long period of time. Concretely, in the presence of the catalyst containing a complex oxide including molybdenum, bismuth and iron as essential components, at least one factor of a reaction pressure and a molar ratio of molecular oxygen to a raw material is controlled to change in such a way that a rate of reaction of the raw material is kept constant in the temperature range of from (TA-15)° C. to TA° C., when a boundary temperature of the activation energy of the catalyst is set to be TA° C.
摘要:
Second transistors working as temperature-monitoring elements are disposed in the vicinity of the respective first transistors (HBT cells) connected in parallel to amplify an RF signal and at positions where their thermal environments are substantially the same. Each of the second transistors is connected between its collector and its base to thereby constitute a diode through which the current rises as the temperature increases. The collectors of the second transistors are connected with a DC power supply through respective first resistors, and their emitters are grounded through respective second resistors. Further, their bases are connected with the bases of the respective first transistors through respective first inductors.
摘要:
Human serum albumin obtained by gene manipulation techniques can be purified by a combination of specified steps in which a culture supernatant obtained from a human serum albumin-producing host is subjected to ultrafiltration, heat treatment, acid treatment and another ultrafiltration, followed by subsequent treatments with a cation exchanger, a hydrophobic chromatography carrier and an anion exchanger, and by salting-out to thereby obtain a pure form of human serum albumin which contains substantially no proteinous and polysaccharide contaminants, which is formulated into a pharmaceutical preparation. This process makes it possible to effeciently purify recombinant human serum albumin and to provide substantially pure human serum albumin which does not contain producer host-related substances and other contaminants and is sufficiently free from coloration.
摘要:
A nonaqueous electrolytic solution of an electrolyte salt dissolved in a nonaqueous solvent, containing a hydantoin compound represented by the following general formula (I) in an amount of from 0.01 to 5% by mass of the nonaqueous electrolytic solution, and excellent in battery characteristics such as high-temperature storage property and cycle property. (In the formula, R1 and R2 each represent a methyl group or an ethyl group; R3 and R4 each represent a hydrogen atom, a methyl group or an ethyl group.)
摘要翻译:溶解在非水溶剂中的电解质盐的非水电解液含有由以下通式(I)表示的乙内酰脲化合物,其量为非水电解液的0.01〜5质量%,电池特性优异 作为高温储存性能和循环性能。 (式中,R 1和R 2各自表示甲基或乙基; R 3和R 4各自表示氢原子,甲基或乙基。)
摘要:
A nonaqueous electrolytic solution capable of improving the low-temperature cycle properties, which is a nonaqueous electrolytic solution of an electrolyte salt dissolved in a nonaqueous solvent, wherein the nonaqueous solvent contains at least two cyclic carbonates selected from ethylene carbonate, 1,2-butylene carbonate, a cyclic carbonate having a methyl group at least at 4-position of ethylene carbonate, and a cyclic carbonate having a fluorine atom at least at 4-position of ethylene carbonate, and the content of the cyclic carbonate having a methyl group at least at 4-position of ethylene carbonate and/or the cyclic carbonate having a fluorine atom at least at 4-position of ethylene carbonate is from 1 to 40% by volume of the total volume of the nonaqueous solvent, and which contains trimethylene glycol sulfite in an amount of from 0.1 to 5% by mass, and an electrochemical element using the same.
摘要:
Disclosed is a method for producing a catalyst, in which physical properties of a dried material or a calcined material in a production process of the catalyst are stable and a change in at least one of a catalyst activity and a selectivity to a target product is small and hence reproducibility of the catalyst is excellent. The present invention is a method for producing a catalyst containing molybdenum, bismuth, and iron, which contains the steps of washing a surface of at least one device equipped in an apparatus for the production of catalyst, to which a solid matter adheres, with a basic solution, and producing the catalyst with the apparatus for the production of catalyst thus washed.
摘要:
A catalyst for use in producing an unsaturated aldehyde and an unsaturated carboxylic acid which is excellent in catalyst activity and selectivity to the unsaturated aldehyde and the unsaturated carboxylic acid, a method for producing such a catalyst and a method for producing an unsaturated aldehyde and an unsaturated carboxylic acid by using such a catalyst are provided. A method for producing a catalyst containing at least molybdenum, bismuth and iron for use in producing an unsaturated aldehyde and an unsaturated carboxylic acid through gas-phase catalytic oxidation of propylene, isobutylene, tertiary butyl alcohol or methyl tertiary butyl ether with molecular oxygen comprises the steps of kneading particles containing catalyst components, an organic binder and a liquid and extrusion molding the resultant kneaded mixture, the organic binder containing at least a high-viscosity organic binder having a viscosity (of its 1% water solution or dispersion at 20° C.) of from 5,000 mPa.s to 25,000 mPa.s and a low-viscosity organic binder having a viscosity (of its 1% water solution or dispersion at 20° C.) of from 10 mPa.s to less than 5,000 mPa.s.
摘要:
A nonaqueous electrolytic solution of an electrolyte salt dissolved in a nonaqueous solvent, which contains a carboxylate represented by the following general formula (8) in an amount of from 0.01 to 5% by mass of the nonaqueous electrolytic solution: wherein X31 represents -A2-C≡Y2, -A2-C(═O)O-A3-C≡Y2 or -A2-C(═O)O-A4; A1, A2 and A3 each independently represent an alkylene group having from 1 to 6 carbon atoms; A4 represents an alkyl group having from 1 to 6 carbon atoms; Y1 and Y2 each independently represent CH or N.
摘要:
A method for producing an unsaturated aldehyde and an unsaturated carboxylic acid through gas-phase catalytic oxidation of propylene, isobutylene or tertiary butanol, which is a raw material, with molecular oxygen in the presence of a catalyst comprising a complex oxide including molybdenum, bismuth and iron as essential components, by controlling the molar ratio of oxygen to the raw material such that a rate of reaction of the raw material is kept constant in the temperature range of from (TA-15)° C. to TA° C., where TA° C. is the boundary temperature of the activation energy of the catalyst.