Process for preparing 2,3,5,6-Tetrafluoro-para-xylyl alcohol,Calixarene additive capable of simultaneously and optionally reducing benzo (alpha) pyrene and phenol contents in cigarette smoke and application method thereof,Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes,Low whitening alpha-cyanoacrylate adhesive,Coumarin-oxacalix[3]arene fluorescent reagents as well as preparation method and application thereof

Patents

Literature

Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.

Hiro

450 results about "Calixarene" patented technology

Filter

Efficacy Topic

Property

Owner

Technical Advancement

Application Domain

Technology Topic

Technology Field Word

Patent Country/Region

Patent Type

Patent Status

Application Year

Inventor

A calixarene is a macrocycle or cyclic oligomer based on a hydroxyalkylation product of a phenol and an aldehyde. The word calixarene is derived from calix or chalice because this type of molecule resembles a vase and from the word arene that refers to the aromatic building block. Calixarenes have hydrophobic cavities that can hold smaller molecules or ions and belong to the class of cavitands known in host–guest chemistry. Calixarene nomenclature is straightforward and involves counting the number of repeating units in the ring and include it in the name. A calix[4]arene has 4 units in the ring and a calix[6]arene has 6. A substituent in the meso position Rb is added to the name with a prefix C- as in C-methylcalix[6]arene.

Process for preparing 2,3,5,6-Tetrafluoro-para-xylyl alcohol

InactiveCN1458137AOrganic compound preparationHydroxy compound preparationSulfolanePotassium fluoride

The preparation process of 2, 3, 5, 6-tetrafluoro-para-xylyl alcohol with 2, 3, 5, 6-tetrachloro-p-phenyl diformyl chloride as material includes fluorination with potassium fluoride, etc. as fluorination agent, sulfolane, etc. as solvent and calixarene, etc. as catalyst and at 40-230 deg.c; esterification of ester with fatty alcohol or aromatic alcohol as esterifying agent and at 20-120 deg.c; reduction of ester with sodium borohydride, etc. as reductant and sulfolane, etc. as solvent, and at -10 deg.c to 60 deg.c; bromination with HBr acid as brominating agent and dichloromethane as solvent and at 30-160 deg.c; and reduction of bromide with magnesium powder, etc as reductant and fatty alcohol, water, chloride, etc as solvent, and at -10 deg.c to 50 deg.c. The present invention has the advantages of simple process, low production cost, high product yield and purity, and is suitable for industrial production.

Owner:TIANJIN UNIV

Calixarene additive capable of simultaneously and optionally reducing benzo (alpha) pyrene and phenol contents in cigarette smoke and application method thereof

ActiveCN101664228AReduce benzo[a]pyrene contentReduce phenol contentTobacco smoke filtersCavity sizePhenol

The invention discloses a calixarene additive capable of simultaneously and optionally reducing benzo (a) pyrene and phenol contents in cigarette smoke and an application method thereof. In the invention, deep-cavity P-(1-(4-hydroxyphenyl)-1-methylethyl) calyx (8) aromatic compound is selected as the additive material, and the compound is added in a common and conventional filter tip which bettercan be suitable for a compound filter, with the additive amount being arbitrarily adjusted according to the needs. By using the molecular recognition function and the cavity size select effect of thecalyx (8) aromatic compound, the additive can be optionally combined with the benzo (a) pyrene and phenol molecules in the cigarette smoke. When the additive is added into the filler with the amount of 10mg / per cigarette, 33.2 percent of benzo (a) pyrene content and 41.4 percent of phenol content in the cigarette smoke can be simultaneously reduced, and other chemical compositions in the smoke arebasically not influenced, thus achieving the goal of selective harm reduction.

450 results about "Calixarene" patented technology

Popular searches