摘要:
4,4'-Dihydroxybiphenyl is prepared by decomposing 4,4'-di(2-hydroxy-2-propyl)biphenyl with hydrogen peroxide and an acid catalyst in acetonitrile as a solvent. Especially, this process minimizes the formation of by-products and permits easy purification of the intended product.
摘要:
4,4'-Dihydroxybiphenyl is prepared by decomposing 4,4'-di(2-hydroxy-2-propyl)biphenyl with hydrogen peroxide and an acid catalyst in acetonitrile as a solvent. Especially, this process minimizes the formation of byproducts and permits easy purification of the intended product.
摘要:
The present invention relates to a process for the production of halobenzophenone derivatives represented by the following formula (II): ##STR1## wherein X and Y are the same or different and are independently F, Cl, Br or I, m stands for an integer of from 1 to 4 and n stands for an integer of from 0 to 4. The process comprises oxidizing a compound with an aqueous nitric acid solution having a specific gravity of from 1.32 to 1.47 at 20.degree. C., said compound being represented by the following formula (I): ##STR2## wherein X, Y, m and n have the same meanings as defined above and Z is Cl or H.
摘要:
An aromatic compound selected from benzene and biphenyl compounds containing at least one isopropyl group is oxidized to convert at least one of the at least one isopropyl group into a 2-hydroxy-2-propyl group. The oxidation of the aromatic compound is effected with molecular oxygen in the presence of an aqueous alkali solution in an oxidative reaction vessel made of nickel at parts thereof where the vessel comes into contact with a reaction mixture. In particular, the above process suppresses the formation of by-products and permits long-term oxidation on an industrial scale.
摘要:
A process for preparing aromatic polycarboxylic acids is disclosed, wherein a benzil derivative is oxidized with molecular oxygen in the presence of an oxidation catalyst consisting substantially of at least one heavy metal catalyst selected from cobalt and manganese and a bromine catalyst in a solvent containing at least 50 wt.% of an aliphatic monocarboxylic acid having at most three carbon atoms.According to this invention, there are provided 4,4'-bis(4-alkylphenyl)benzils (wherein alkyl is methyl, ethyl or isopropyl), which are novel benzil derivative.
摘要:
There is provided a novel method for producing a nitride single crystal with both a rapid crystal growth rate and high crystal quality, as well as a novel autoclave that can be used in the method. The invention provides a method for producing a Ga-containing nitride single crystal by an ammonothermal method, comprising introducing at least a starting material, an acidic mineralizer and ammonia into an autoclave, and then growing a Ga-containing nitride single crystal under conditions wherein the temperature (T1) at the single crystal growth site is 600° C. to 850° C., the temperature (T1) at the single crystal growth site and the temperature (T2) at the starting material feeder site are in the relationship T1>T2, and the pressure in the autoclave is 40 MPa to 250 MPa, as well as an autoclave that can be used in the method.
摘要:
An operating device for a manual transmission apparatus, comprising a plurality of operation shafts, a shift-and-select shaft having an engagement groove extending in a circumferential direction thereof, selecting one of a plurality of operation shafts by rotating and moving the selected operation shaft in an axial direction thereof by moving in an axial direction of the shift-and-select shaft, an operating portion for manually operating the shift-and-select shaft, an inertia unit including an engagement pin, positioned within the engagement groove and pivoting in response to a movement of the shift-and-select shaft in the axial direction thereof, and a swing-and-contact member provided at the engagement pin of the inertia unit so as to swing when being pressed by one of first and second inner surfaces of the engagement groove in accordance with the movement of the shift-and-select shaft and contacting the first and second inner surfaces of the engagement groove.
摘要:
An execution environment software application allows a computer to function as an identification information storage means for storing identification information about applications, identification information searching means for searching the identification information storage means for the identification information specified by a first application being executed, and an application execution instructing means for delivering predetermined delivery information created depending on the result of the execution of the first application of when the identification information is specified to a second application corresponding to the identification information and giving an instruction to execute the second application using the delivery information.
摘要:
A plated material 5, containing: on a conductive substrate 1, an underlayer 2 composed of nickel and the like; an intermediate layer 3 composed of Cu or a Cu alloy being provided thereon; and an outermost layer 4 composed of a Cu—Sn intermetallic compound being provided thereon; and an electric or electronic part using the same.
摘要:
An aluminum conducting wire, containing a stranded conductor that is formed by stranding solid conductors of an aluminum alloy, in which the aluminum alloy comprises 0.1 to 1.0 mass % of Fe, 0.05 to 0.5 mass % of Cu, and 0.05 to 0.4 mass % of Mg, in which the total amount of Cu and Mg is 0.3 to 0.8 mass %, with the balance being aluminum and inevitable impurities, and a solid conductor of an aluminum alloy for the aluminum conducting wire.