摘要:
In a process for producing an alkyl group-substituted aromatic hydrocarbon according to the present invention, (i) an aromatic hydrocarbon is reacted with (ii) an alkylating agent selected from the group consisting of olefins, lower aliphatic alcohols and alkyl halides in the presence of a mordenite-type zeolite catalyst treated with a fluorine-containing compound, and therefore the conversion of the aromatic compound can be increased and further it is possible to introduce the specific number of alkyl groups into the specific position of the aromatic compound.In particular, when biphenyl is used as the aromatic hydrocarbon and propylene is used as the alkylating agent, p,p'-diisopropylbiphenyl can be obtained in a high yield and high selectivity.
摘要:
A process is disclosed which is capable of producing p,p'-biphenol of high purity by the dealkylation reaction of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl and which yet allows isobutene to be recovered in high yield. The process performs the dealkylation reaction of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl in the presence of an acid catalyst using as a solvent a saturated hydrocarbon having a boiling point of 190.degree. C. or above, an alicyclic hydrocarbon having a boiling point of 190.degree. C. or above, a hydrocarbon with an iodine value of no more than 1, sulfolane, or a mixture of these solvents. Also disclosed is a process for producing p,p'-biphenol from a mixture of 2,6-di-t-butyl-phenol and 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone or from a mixture of 2,6-di-t-butylphenol, 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone and 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl. In this process, the synthesis of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl by the redox reaction between 2,6-di-t-butylphenol and 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone and the production of p,p'-biphenol by the dealkylation reaction of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl are performed at one stage in the presence of both an acid catalyst and a solvent at a temperature of 120.degree.-280.degree. C.
摘要:
Processes for preparing biphenols by oxidation coupling of phenols, to which the present invention is directed, are characterized in that said oxidation coupling reaction is carried out under such conditions that the same diphenoquinones as those produced as by-products at the time when said oxidation coupling is effected are added to the reaction system. According to a preferred embodiment of the invention, moreover, the yield of biphenols can be enhanced by the reuse in the abovementioned reaction of diphenoquinones recovered from the reaction mixture containing the same.
摘要:
A process for producing an alkenyl substituted aromatic compound having the general formula (I): ##STR1## wherein Ar represents an aromatic ring, R.sup.1 represents an alkenyl group having 2 to 8 carbon atoms, p is 1, 2, or 3 provided that R.sup.1 may be the same or different when p is 2 or 3, R.sup.2 represents an alkyl group having 1 to 8 carbon atoms, q is 0, 1, or 2 provided that R.sup.2 may be the same or different when q is 2, X represents --OH or --NR.sup.3 R.sup.4 wherein R.sup.3 and R.sup.4 independently represent hydrogen or an alkyl group having 1 to 2 carbon atoms, n is 1 or 2, provided that the sum of p and q is 1, 2, or 3 comprising the step of catalytically dehydrogenating an alkyl substituted aromatic compound having the general formula (III): ##STR2## wherein R.sup.5 represents an alkyl group having 2 to 8 carbon atoms and Ar, R.sup.2, X, p, q, and n are the same as defined above, n is 1 or 2, provided that R.sup.5 may be the same or different when p is 2 or 3 in the presence of a catalyst comprising (a) at least one iron oxide as a main component and (b) at least one oxide of metals belonging to the group III, IV or V of the periodic table of atoms.This catalyst can produce an alkenyl substituted aromatic compound having a hydroxyl or amino group in the aromatic ring thereof from the dehydrogenation of the corresponding alkyl substituted aromatic compound at a high yield and high selectivity and has a prolonged catalyst life.
摘要:
N-alkyl amino phenols, such as N-ethyl-m-amino phenol are produced in high yield and with high purity by reacting a divalent phenol, such as resorcinol, with an alkylamine, such as ethylamine, in the absence of catalyst and solvent, at a temperature of 120.degree.-210.degree. C. under elevated pressure in an inert gas atmosphere. In a first embodiment, the resulting reaction mixture is acidified to convert the N-alkylaminophenol to its water soluble salt and the resulting aqueous layer is separated from the oily layer. The aqueous layer is rendered alkaline to liberate N-alkylaminophenol as an oily layer. The N-alkyl-aminophenol oily layer is then separated from the aqueous layer and distilled. In an alternative embodiment, the reaction mixture resulting from the reaction between the divalent phenol and alkylamine is combined with an aqueous solution of an alkali to convert unreacted phenol to its water soluble salt while the product N-alkylaminophenol remains in an oily phase which is separated from the aqueous phase. An organic solvent is used as an extractant. The recovered N-alkylaminophenol organic solution is then distilled to recover N-alkylaminophenol. Purities of the recovered N-alkylaminophenol in excess of 95% can be achieved.
摘要:
The present invention relates to a method for modifying a porous film mainly having Si—O bonds wherein a thermal treatment is conducted without using a metal catalyst by bringing an organic silicon compound into contact with the porous film. The organic silicon compound includes one or more Si—X—Si bond unit (wherein X represents O, NR, CnH2n, or C6H4; R represents CmH2m+1 or C6H5; m is an integer between 1 and 6; and n is 1 or 2) and two or more Si-A bond units (wherein A represents H, OH, OCeH2e+1 or a halogen atom and can be the same or different within a single molecule; and e is an integer between 1 and 6). Since the porous film obtained by this method is excellent in the hydrophobic property and the mechanical strength, it can be used as an optically functional material or an electronically functional material. The porous film is especially useful as a semiconductor material, and can be preferably used as an interlayer insulating film in a semiconductor device.
摘要翻译:本发明涉及一种用于改性主要具有Si-O键的多孔膜的方法,其中通过使有机硅化合物与多孔膜接触而不使用金属催化剂进行热处理。 有机硅化合物包括一个或多个Si-X-Si键单元(其中X表示O,NR,C n H 2n H 2n或C 6, R 4表示C m H 2 m + 1或C 6 H 5, m是1和6之间的整数; n是1或2)和两个或更多个Si-A键单元(其中A表示H,OH,OC 2e + 1或卤素原子,并且可以在单分子内相同或不同; e为1至6之间的整数)。 由于通过该方法获得的多孔膜的疏水性和机械强度优异,因此可以用作光学功能材料或电子功能材料。 多孔膜特别可用作半导体材料,并且可以优选用作半导体器件中的层间绝缘膜。
摘要:
The present invention relates to a method for modifying a porous film mainly having Si—O bonds wherein a thermal treatment is conducted without using a metal catalyst by bringing an organic silicon compound into contact with the porous film. The organic silicon compound includes one or more Si—X—Si bond unit (wherein X represents O, NR, CnH2n, or C6H4; R represents CmH2m+1 or C6H5; m is an integer between 1 and 6; and n is 1 or 2) and two or more Si-A bond units (wherein A represents H, OH, OCeH2e+1 or a halogen atom and can be the same or different within a single molecule; and e is an integer between 1 and 6). Since the porous film obtained by this method is excellent in the hydrophobic property and the mechanical strength, it can be used as an optically functional material or an electronically functional material. The porous film is especially useful as a semiconductor material, and can be preferably used as an interlayer insulating film in a semiconductor device.
摘要翻译:本发明涉及一种用于改性主要具有Si-O键的多孔膜的方法,其中通过使有机硅化合物与多孔膜接触而不使用金属催化剂进行热处理。 有机硅化合物包括一个或多个Si-X-Si键单元(其中X表示O,NR,C n H 2n或C 6 H 4; R表示C m H 2n + 1或C 6 H 5; m为1至6的整数; n为1或 2)和两个或更多个Si-A键单元(其中A表示H,OH,OCeH 2e + 1或卤素原子,并且在单分子内可以相同或不同; e为1至6之间的整数)。 由于通过该方法获得的多孔膜的疏水性和机械强度优异,因此可以用作光学功能材料或电子功能材料。 多孔膜特别可用作半导体材料,并且可以优选用作半导体器件中的层间绝缘膜。
摘要:
Water-repellent porous silica having uniform pores, which comprises silica skeleton wherein fluorine atoms are fixed through covalent bonds and which has an alkali metal content of not more than 10 ppb, is synthesized. By the water-repellent porous silica, a water-repellent porous silica film having uniform pores, which is applicable to a light functional material or an electron functional material, a process for preparing the same and uses thereof can be provided.
摘要:
A hydrophobic compound having at least one each of hydrophobic group (an alkyl group having 1 to 6 carbon atoms or a —C6H5 group) and polymerizable group (a hydrogen atom, a hydroxyl group or a halogen atom) is allowed to undergo a gas-phase polymerization reaction, under reduced pressure (of not more than 30 kPa), in the presence of a raw porous silica film and to thus form a modified porous silica film wherein a hydrophobic polymer thin film is formed on the inner walls of holes present in the raw porous silica film. The resulting porous silica film has a low relative dielectric constant and a low refractive index and the silica film is likewise improved in the mechanical strength and hydrophobicity. A semiconductor device is produced using the porous silica film.
摘要翻译:具有疏水性基团(具有1〜6个碳原子的烷基或-C 6 H 5基团)和可聚合基团(氢原子,羟基或卤素原子)中的至少一种的疏水化合物被允许进行气 - 在减压(不大于30kPa)的条件下,在原料多孔二氧化硅膜的存在下进行相聚合反应,从而形成改性多孔二氧化硅膜,其中在存在于孔中的孔的内壁上形成疏水性聚合物薄膜 原料多孔二氧化硅膜。 所得到的多孔二氧化硅膜的相对介电常数低,折射率低,二氧化硅膜的机械强度和疏水性同样提高。 使用多孔二氧化硅膜制造半导体器件。
摘要:
There are provided a method for producing porous silica and a porous silica film having low specific dielectric constant and high mechanical strength, that are preferably applicable to optical functional materials, electronic functional materials or the like, and a method for producing an interlayer insulating film, a semiconductor material and a semiconductor apparatus and a producing apparatus, which use the porous silica film. A solution containing a hydrolysis-condensation product of alkoxysilanes and a surfactant is dried to form a composite to which are then applied in the following order an ultraviolet ray irradiation treatment and a hydrophobic treatment with the use of an organic silicon compound having an alkyl group. By forming the composite by drying the solution on a substrate, the porous silica film is obtained.