摘要:
2,3-Dimethoxy-5-methylbenzoquinone is prepared by oxidizing 3,4,5-trimethoxytoluene by reaction with hydrogen peroxide in the presence of a catalyst which is a heteropolyacid selected from phosphomolybdic acids, phosphotungstic acids, silicomolybdic acids and silicotungstic acids or a salt thereof.
摘要:
2,3,5-Trimethyl-p-benzoquinone is prepared advantageously by the catalytic oxidation of 2,3,5- or 2,3,6-trimethylphenol with hydrogen peroxide in an organic solvent, which is preferably acetic acid, in the presence of a catalyst which is a heteropolyacid of silicon or phosphorus as the center atom selected from phosphomolybdic acid, silicomolybdic acid, phosphotungstic acid and silicotungstic acid. The reaction proceeds rapidly even at room temperature to give the product in a high yield so that the method is industrially advantageous in addition to the advantages in respect of the inexpensiveness of the reactants and catalyst and absence of any noxious byproducts which may cause environmental pollution.
摘要:
A process for the production of hydrocarbons having 2 or more carbon atoms by oxidative coupling of methane includes a step of contacting a feed gas containing methane with an oxide of metals having the following composition:MCo.sub.1-x Fe.sub.x O.sub.ywherein M stands for at least one alkaline earth metal x is a number greater than 0 but not greater than 1 and y is a number in the range of 2.5-3.5, at a temperature of 500.degree.-1000.degree. C.
摘要:
The invention provides an efficient method for the preparation of cycloheone by the liquid-phase oxidation of cyclohexene in the presence of a catalyst system. The rate of conversion of the cyclohexene and the yield of cyclohexanone are unexpectedly increased when the reaction mixture brought into contact with oxygen or air contains a limited amount of an aliphatic alcohol having 2-10 carbon atoms in a molecule such as ethyl alcohol with the catalyst system composed of a palladium compound, e.g. PdCl.sub.2, and at least one co-catalytic ingredient which is a copper compound or iron compound such as CuCl.sub.2 or FeCl.sub.3. The influence of benzene or cyclohexane admixed in the reaction mixture was studied to indicate no adverse effects or even better results in the reaction giving further advantages of the process in which the starting cyclohexene need not be purified and can be used as prepared by the partial hydrogenation of benzene or partial dehydrogenation of cyclohexane.
摘要:
A process for the production of conjugated diolefins having 4-6 carbon atoms from the corresponding monoolefins according to the oxidative dehydrogenation process wherein oxides of molybdenum, arsenic and an alkaline earth metal are used as catalyst. The use of this catalyst enables the production of conjugated diolefins in a high yield.
摘要:
Disclosed is a photosensitive resin composition comprising an alkali-soluble resin, wherein the dissolution rate of the alkali-soluble resin in an aqueous sodium carbonate solution is not less than 0.04 μm/sec. When a photosensitive layer having a thickness of 30 μm is formed by applying the photosensitive resin composition onto a base and removing the solvent by heating, and thus-obtained photosensitive layer is irradiated with an active ray of 1000 mJ/cm2 or less, the dissolution rate of the portion irradiated with the active ray in the photosensitive layer made of the photosensitive resin composition is not less than 0.22 μm/sec and the film residual rate of the portion not irradiated with the active ray is not less than 90%.
摘要翻译:公开了一种包含碱溶性树脂的光敏树脂组合物,其中碱溶性树脂在碳酸钠水溶液中的溶解速率不小于0.04微米/秒。 当通过将感光性树脂组合物涂布在基材上并通过加热除去溶剂来形成厚度为30μm的感光层时,用1000mJ / cm 2以下的活性光线照射所得到的感光层, 由感光性树脂组合物制成的感光层中用活性射线照射的部分的比例不小于0.22μm/ sec,未用活性射线照射的部分的膜残留率不小于90%。
摘要:
An image forming apparatus includes: an image support medium; a charging member for charging the surface of the image support medium in contact with the surface of it; an exposure device for irradiating with light the surface of the image support medium charged by the charging member to form a static latent image; a developing device for supplying developer to the static latent image formed on the image support medium to develop the latent image and for removing the leftover developer on the image support medium; a transfer device for transferring the developer image, which has been developed on the image support medium by the developing device, to a member to be transferred; and a scraping member for scraping foreign matter such as dust and paper particles on the image support medium. The image forming apparatus is constructed such that the charging member causes the developer to adhere to the scraped foreign matter, and then the foreign matter is collected by the developing device through the image support medium. The scraping member is held by a holder which has an opening for allowing the foreign matter to pass through into the charging member housing.
摘要:
A photoconductor coupled liquid crystal light valve comprising at least a pair of transparent electrode, a liquid crystal layer and a photoconductive layer showing blocking properties both sandwiched between said transparent electrodes, wherein said photoconductive layer includes a light absorbing layer and a blocking layer having a band gap wider than said light absorbing layer, both said light absorbing layer and said blocking layer being formed of non-alloy a-Si; and a method for manufacturing said photoconductor coupled light valve wherein said photoconductive layer is prepared with electron cyclotron resonance method.
摘要:
A method for fabricating a photoconductor coupled liquid crystal valve comprising the step of; deposing a transparent electrode on a transparent substrate; forming on said transparent electrode a photoconductive layer formed of amorphous silicon by the ECR; forming on said photoconductive layer an optical shielding layer formed of amorphous silicon by the ECR; forming on said optical shielding layer an optical reflection layer; forming an orientation film on said optical reflection layer; laminating on said orientation film a transparent substrate having a transparent electrode and another orientation film stoked thereon by the above method in such a manner that the two orientation films face each other with a spacer interposed therebetween; and disposing liquid crystals into said spacer.
摘要:
An improved photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of a amorphous silicon containing hydrogen and/or halogen of 40 at. % or more.