100 results about "18-Crown-6" patented technology

A process for producing a fluoroolefin of the formula: CF3CY=CXnHp wherein Y is a hydrogen atom or a halogen atom (i.e., fluorine, chlorine, bromine or iodine); X is a hydrogen atom or a halogen atom (i.e., fluorine, chlorine, bromine or iodine); nand p are integers independently equal to 0, 1 or 2, provided that (n + p) = 2; comprising contacting, in the presence of a phase transfer catalyst, a compound of the formula: CF3C (R<l>aR<2>b) C (R<3>CR<4>d) , wherein R<1>, R<2>, R<3>, and R<4> are independently a hydrogen atom or a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, provided that at least one of R<1>, R<2>, R<3>, and R<4> is halogen and there is at least one hydrogen and one halogen on adjacent carbon atoms; a and b are independently = 0, 1 or 2 and (a+b) = 2; and c and d are independently = 0, 1, 2 or 3 and (c+d) = 3; and at least one alkali metal hydroxide. The alkali metal hydroxide can be, for example, potassium or sodium hydroxide and the phase transfer catalyst can be, for example, at least one: crown ether such as 18-crown-6 and ls-crown-S; or onium salt such as, quaternary phosphonium salt and quaternary ammonium salt. The olefin is useful, for example, as an intermediate for producing other industrial chemicals and as a monomer for producing oligomers and polymers.

An extractant composition comprising a mixed extractant solvent consisting of calix[4] arene-bis-(tert-octylbenzo)-crown-6 (“BOBCalixC6”), 4′,4′,(5′)-di-(t-butyldicyclo-hexano)-18-crown-6 (“DtBu18C6”), and at least one modifier dissolved in a diluent. The DtBu18C6 may be present at from approximately 0.01M to approximately 0.4M, such as at from approximately 0.086 M to approximately 0.108 M. The modifier may be 1-(2,2,3,3-tetrafluoropropoxy)-3-(4-sec-butylphenoxy)-2-propanol (“Cs-7SB”) and may be present at from approximately 0.01M to approximately 0.8M. In one embodiment, the mixed extractant solvent includes approximately 0.15M DtBu18C6, approximately 0.007M BOBCalixC6, and approximately 0.75M Cs-7SB modifier dissolved in an isoparaffinic hydrocarbon diluent. The extractant composition further comprises an aqueous phase. The mixed extractant solvent may be used to remove cesium and strontium from the aqueous phase.

The invention relates to a production process for ultra-pure N-methylpyrrolidone. According to the invention, industrial grade N-methylpyrrolidone is used as a raw material and is subjected to pretreatment, 4A molecular sieve adsorption and dehydration and two times of membrane filtration respectively through a beta-cyclodextrin composite membrane and a 18-crown-6 composite membrane; an obtained filtrate undergoes vacuum rectification; collected fractions are subjected to condensation at first and to third-stage membrane filtration so as to prepare a target product. Ultra-pure N-methylpyrrolidone prepared by the process provided in the invention has a purity of more than 99.8%, water content of less than 0.03% and individual metal ion content of less than 1 ppb, being in conformity with the chemical material part class 8 (SEMI C8) established by Semiconductor Equipment and Materials International. Compared to the prior art, the invention has the advantages of stable product quality, simple operation and suitability for industrial continuous production.

The invention relates to a process for continuously producing extra high purity nitric acid, which comprises the following steps: first, industrial grade 80-90% nitric acid raw material and double allyl 18-crown-6 ether organosilicon macromolecular complexing agent accounting for 0.2-2% of the weight of nitric acid raw material are mixed in a pretreater, then, the mixture is filtered by a micro-filtration membrane under a working pressure of 0.1-0.2 Mpa, the filtrate enters a rectification tower, and the semi-finished product going through the rectification tower is diluted by ultra pure waterin a dilution device; after the dilution is finished, the dissociative NO2 is expelled by high pure nitrogen in a whitening device, and the obtained finished product is filtered by a nanometer filtermembrane and enters a finished product receiver under the working pressure of 0.5-0.8 Mpa; wherein, the aperture of the micro filtration membrane is 0.2 to 0.8 Mu m, and the aperture of the nanometerfilter membrane is 0.5 to 1.5 nm. In the prepared ultra high purity nitric acid, the content of single cation is lower than 1 ppb, the content of single anion is lower than 100 ppb, and the content of the dust particle larger than 0.5 Mu m is lower than 5 per milliliter. The production process for extra high purity nitric acid has the advantages of simple technique, low production costs, high purityof products, low content of impurity ions, and applicability for large-scale mass production.

The invention provides a potassium ion fluorescence probe as well as a preparation method and application thereof. The potassium ion fluorescence probe utilizing phenylazepin-18-crown-6-amine as a recognition group and a hemicyanine dye group as a fluorescence group has the advantages of environmental sensitivity, good water solubility, high detection accuracy and high response speed to concentration change of potassium ions, is a colorimetric and instant rate type potassium ion detection probe and can be prepared into detection test paper, and the content of the potassium ions can be rapidly detected according to the color change of the test paper; and the potassium ion fluorescence probe is hopeful to be used for detecting the concentration of the potassium ions in traditional Chinese medicine injections and red wine, human urine or blood and has wide application prospects.

The invention relates to adamantane diaza-crown ether derivatives and the use of mono and diaza-crown ether adamantine derivatives in treatment, especially in tumor treatment. Adamantane aza-crown ethers were obtained by reaction of the corresponding adamantane derived tosylates or adamantane acid chlorides with mono- and diaza-18-crown-6. The prepared compounds showed moderate (monoaza-18-crown-6) to strong (diaza-18-crown-6) antiproliferative and cytotoxic activity on several tumor cell lines, revealing their potential for inhibiting the growth of other tumor cells.

A mixed extractant solvent that includes at least one dialkyloxycalix[4]arenebenzocrown-6 compound, 4′,4′,(5′)-di-(t-butyldicyclohexano)-18-crown-6, at least one modifier, and, optionally, a diluent. The dialkyloxycalix[4]arenebenzocrown-6 compound is 1,3-alternate-25,27-di(octyloxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(decyloxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(dodecyloxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(2-ethylhexyl-1-oxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(3,7-dimethyloctyl-1-oxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(4-butyloctyl-1-oxy)calix[4]arenebenzocrown-6, or combinations thereof. The modifier is a primary alcohol. A method of separating cesium and strontium from an aqueous feed is also disclosed, as are dialkyloxycalix[4]arenebenzocrown-6 compounds and an alcohol modifier.