摘要:
The present invention concerns dispiroindenopyridines and dispiroindenopyridazines and derivatives thereof, methods for their preparation, the study and definition of their properties, and their uses. In particular, the present invention relates to the preparation of new classes of heical molecules represented by the general formulae A) and/or A') and/or B) and/or B') for use in applications in the field of organic electronics, since they have proved to have greater and more advantageous properties in comparison with the other known organic molecules that may be taken into consideration as candidates for the same use.
摘要:
This invention relates to a process and system for cracking hydrocarbon feedstock containing vacuum resid comprising: (a) subjecting a vacuum resid to a first thermal conversion in a thermal conversion reactor (such as delayed coker, fluid coker, Flexicoker TM , visbreaker and catalytic hydro visbreaker) where at least 30 wt% of the vacuum resid is converted to material boiling below 1050°F (566°C); (b) introducing said thermally converted resid to a vapor/liquid separator, said separator being integrated into a steam cracking furnace, to form a vapor phase and liquid phase; (c) passing said vapor phase to the radiant furnace in said steam cracking furnace; and (d) recovering at least 30 wt% olefins from the material exiting the radiant furnace (based upon the weight of the total hydrocarbon material exiting the radiant furnace).
摘要:
An improved hydroformylation process is provided, which comprises reacting an olefin with CO and H 2 in the presence of a hydroformylation catalyst in a liquid that has been volumetrically expanded with a compressed gas, such as supercritical carbon dioxide.
摘要:
The present invention is directed to electro-optico chromophore bridge compounds and donor-bridge compounds which can be used in the preparation of polymeric thin films for waveguide media.
摘要:
The various aspects presented herein relate to the perfumery industry. More particularly, the various aspects presented herein relate to the use of volatile compositions to limit, decrease or eliminate the perception of malodor. Such compositions include at least one malodor antagonist optionally combined with perfuming ingredients. Such compositions, their use in combination with delivery systems and their applications in consumer products are also objects of the present disclosure.
摘要:
The present invention relates to an industrially advantageous process for the preparation of beta-ionylideneacetaldehyde of structural Formula I, which is a key intermediate for the synthesis of vitamin A and related compounds such as tretinoin and isotretinoin.
摘要:
In a process for the oligomerization of C2-C12-alkenes, an alkene-containing feedstock having a water content of from 0.05 to 0.25 molar %, based on the hydrocarbon content of the feedstock, is passed over a zeolite catalyst. Improved alkene conversion and catalyst life are obtained compared to processes in which non-hydrated feedstocks are used.
摘要:
The present disclosure describes hyperpolarized materials for use in nuclear magnetic resonance, magnetic resonance imaging, or similar applications. The present disclosure describes methods for producing hyperpolarized materials for use in nuclear magnetic resonance, magnetic resonance imaging, or similar applications. The present disclosure describes precursor compounds for use in producing hyperpolarized materials for use in nuclear magnetic resonance, magnetic resonance imaging, or similar applications.