- H β molecular sieve catalytic O-chlorotoluene preparation 2, 6 - dichloro toluene method (by machine translation)
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The invention relates to 2, 6 - dichloro toluene preparation technology field, in particular to a molecular sieve catalyst H β of O-toluene selective chlorination of preparation 2, 6 - dichloro toluene. The invention relates to a low cost of O-toluene as the raw materials, chlorine is the chlorinating agent, H β molecular sieve as the catalyst, adopt the one-step chlorination process, catalytic O-toluene selective chlorination of preparation 2, 6 - dichloro toluene, the process is easy to operate, simple steps, low production cost, easy industrialization. (by machine translation)
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Paragraph 0026; 0028-0031
(2017/08/26)
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- A chloro-toluene-ionic liquid catalyst preparation 2,6 the method of [...] dichloro-toluene
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The invention discloses a method for preparing 2,6-dichlorotoluene by catalyzing o-chlorotoluene with an ionic liquid. According to the method for preparing 2,6-dichlorotoluene, Cl2 is taken as a chlorinating agent, under the action of a catalyst, namely, an aluminium chlorate ionic liquid, a raw material, namely, o-chlorotoluene, is directionally chlorinated, and the 2,6-dichlorotoluene is prepared; an intermediate of the aluminium chlorate ionic liquid is [BMIM]Cl, the molar ratio of AlCl3 to [BMIM]Cl is 1:3, and the usage amount of the aluminium chlorate ionic liquid accounts for 0.1%-1% of the mass of o-chlorotoluene; the method for preparing 2,6-dichlorotoluene by selectively chlorinating the o-chlorotoluene is simple in technology and mild in reaction condition, the used aluminium chlorate ionic liquid is good in catalytic activity and good in stability, can be separated from a product easily and can significantly improve the selectivity of 2,6-dichlorotoluene, and the method has the very high industrial application value.
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Paragraph 0024; 0027; 0032
(2017/02/24)
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- Synthesis of Triptycene-Based Molecular Rotors for Langmuir-Blodgett Monolayers
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We describe syntheses of six triptycene-containing molecular rotors with several single-crystal X-ray diffraction analyses. These rod-shaped molecules carrying an axial rotator are designed to interleave on an aqueous surface into Langmuir-Blodgett (LB) monolayers containing a two-dimensional trigonal array of dipoles rotatable about an axis normal to the surface. Monolayer formation was verified with the simplest of the rotor structures. On an aqueous subphase containing divalent cations (Mg2+, Ca2+, Zn2+, Sr2+, or Cd2+), the LB isotherm yielded an area of 53 ± 3 ?2/molecule (monolayer of type A), compatible with the anticipated triangular packing of axes normal to the surface. On pure water, the area is 30 ± 3 ?2/molecule, and it is proposed that in this monolayer (type B), the molecular axes are tilted by 40-45° to a structure similar to those observed in single crystals of related triptycenes. After transfer to a gold surface, ellipsometry and PM IRRAS yield tilt angles of 29 ± 4° (monolayers of type A) and 38 ± 4° (type B). A full-scale examination of monolayers from all the rotors on a subphase and after transfer is underway and will be reported separately.
- Kaleta, Ji?í,Kaletová, Eva,Císa?ová, Ivana,Teat, Simon J.,Michl, Josef
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p. 10134 - 10150
(2015/11/03)
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- Process for preparing substituted chloroaromatics
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Substituted chloroaromatics are obtained in a simple manner in virtually isomer-free form when substituted phenols of the formula (II) STR1 where R1 to R5 are each, independently of one another, hydrogen, C1 -C10 -alkyl, unsubstituted or substituted C6 -C10 -aryl or halogen, with at least one of these radicals being different from hydrogen, are reacted with dichlorotriphenylphosphorus.
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