563-47-3Relevant articles and documents
METHOD FOR PREPARING 2-METHYLALLYL CHLORIDE FROM 1,2-DICHLOROTERT-BUTANE
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Paragraph 0026, (2021/11/26)
The present invention relates to a method for preparing 2-methylallyl chloride from 1,2-dichloro-tert-butane. The method is characterized in that 1,2-dichloro-tert-butane and a sodium hydroxide aqueous solution are used as raw materials; reactive rectification is performed in a combined rectifying tower to eliminate hydrogen chloride so as to obtain 2-methylallyl chloride. A plate type tower is provided at the lower part of the combined rectifying tower; a packing tower is provided at the upper part of the combined rectifying tower; an inner reflux condenser is provided at the top of the combined rectifying tower. The sodium hydroxide aqueous solution is added from a first plate of the plate type tower; and 1,2-dichloro-tert-butane is added from the middle part of the plate type tower. The method has the advantages that the raw material 1 and 1,2-dichloro-tert-butane is fully converted; the selectivity of the 2-methylallyl chloride is high.
Method for co-producing methyl chloropropene and 2-chloro-2-methylpropane by chlorination of isobutene
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Paragraph 0025; 0026, (2020/01/12)
The invention discloses a method for co-producing methyl chloropropene and 2-chloro-2-methylpropane by chlorination of isobutene. According to the method, a chlorination reaction is carried out on chlorine or a mixture of chlorine and inert gas and excessive isobutene to obtain products, namely methyl chloropropene and 2-chloro-2-methylpropane. The method can reduce influence of micro-mixing on arapid chlorination reaction of isobutene, decarburization and coking do not occur easily, and 2-chloro-2-methylpropane can be co-produced while the yield of methyl chloropropene is improved.
Chlorinating preparation method for low-carbon olefins
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Paragraph 0037-0039, (2020/01/12)
The invention discloses a chlorinating preparation method for low-carbon olefins. According to the method, chlorine gas is diluted with inert gas and then reacts with low-carbon olefins, thus, influence caused by microscopic mixing can be obviously reduced, namely, a too high local temperature can be avoided, thus, side reactions including a decarbonization phenomenon caused by the too high localtemperature can be obviously reduced, and a relatively good chloride yield can be obtained.
Process for functionalising a phenolic compound carrying an electron-donating group
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, (2008/06/13)
The invention concerns a method for functionalizing a phenolic compound bearing an electron-donor group, in said group para position, inter alia a method for the amidoalkylation of a phenolic compound bearing an electron-donor group, and more particularly, a phenolic compound bearing an electron-donor group preferably, in the hydroxyl group ortho position. The method for functionalizing in para position with respect to an electron-donor group carried by a phenolic compound is characterised in that the phenolic compound bearing an electron-donor group is subjected to the following steps: a first step which consists of protecting the hydroxyl group in the form of a sulphonic ester function; a second step which consists in reacting the protected phenolic compound with an electrophilic reagent; optionally, a third step deprotecting the hydroxyl group.
Quaternary ammonium polychlorides as efficient reagents for chlorination of unsaturated compounds
Zelikman,Tyurin,Smirnov,Zyk
, p. 1541 - 1546 (2007/10/03)
Chlorination of unsaturated compounds by benzyltributylammonium polychlorides results in higher yields of addition products compared to those obtained with molecular chlorine.
Esterification of carboxylic acid salts
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, (2008/06/13)
Mono- or polycarboxylic acid esters are prepared by reacting a salt of such carboxylic acid with an organic halocompound, e.g., a (cyclo)alkyl, (cyclo)alkenyl, aryl or aralkyl halide, in an aqueous reaction medium, in the presence of a catalytically effective amount of a phase transfer catalyst, for example an onium salt.
1,1-dicyclohexyl cycloalkane derivative, method for the preparation thereof and traction-drive fluid containing the same
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, (2008/06/13)
The invention provides a novel compound 1,1-dicyclohexyl cycloalkane derivative represented by the general formula STR1 in which R1 and R2 are each a hydrogen atom or lower alkyl group, R3 to R6 are each a hydrogen atom, lower alkyl group or alkylene group forming a ring structure together with either one of the others and the carbon atom in the cycloalkane ring, and m and n are each zero or a positive integer not exceeding 6 with the proviso that m+n is 4-6, such as 1,1-dicyclohexyl cyclohexane. The compound has a relatively low viscosity and high traction coefficient even at elevated temperatures so that it is useful as a constituent of a traction-drive fluid usable in a compact and light-weight traction-drive apparatus. The compound can be synthesized by subjecting a corresponding 1,1-di(hydroxyphenyl) cycloalkane compound to a hydrogenation reaction and dehydration reaction in combination in the simultaneous presence of a hydrogenation catalyst and a dehydration catalyst.
Process for manufacturing methallyl chloride
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, (2008/06/13)
A method for manufacturing methallyl chloride by reacting isobutene with chlorine in the gas phase is disclosed. The reaction is carried out in a distributed nozzle-mixing reactor which enables the reaction to proceed in a stabile manner even without addition of oxygen. At the same time, the yield of methallyl chloride is increased.
