161 results about "Propyl bromide" patented technology

This disclosure concerns a process and apparatus for reclamation of waste polystyrene-type materials for reuse within the specification ranges of the input polystyrene-type material. The disclosed process and apparatus include dissolution of the waste polystyrene-type materials in a dissolve section utilizing a reusable solvent having a low boiling point and high vaporization rate, removal of solid contaminants in one or more filter sections, devolatilization of the dissolved polystyrene and recovery of the polystyrene-type material in a solid form in a recovery section. Preferably the process and apparatus provide a closed system and include recycling and reuse in the process of the vaporized solvent. The maximum temperature in the recovery section is 190° C. The reusable solvent is preferably environmentally safe and has a low boiling point and high vaporization rate. n-Propyl bromide, or environmentally safe mixtures thereof, including mixtures with isopropyl alcohol, is the preferred reusable solvent.

The invention relates to a method for preparing a high-performance titanium and silicon molecular sieve. The method comprises the following steps of: 1) uniformly mixing tetrapropylammonium bromide, ammonium fluoride, water and a hydrogen peroxide solution to obtain a clarified solution A; 2) under the condition of stirring, adding a titanium source into the solution A, adjusting the pH to be 10 to 13 by using ammonia water, and ageing until a light yellow clarified solution B is formed; 3) adding a silicon source into the solution B, and uniformly mixing to obtain crystallized mother liquor C; and 4) crystallizing the crystallized mother liquor C at the temperature of between 130 and 190 DEG C and self-generated pressure for 10 to 100 hours, and separating to obtain the solid titanium and silicon molecular sieve product. According to the method, the problems of high production cost and low catalysis performance of the titanium molecular sieve in the prior art are well solved; and the method for assisting in synthesizing the titanium and silicon molecular sieve by using low-water-ratio ammonium fluoride can be applied to industrial production of the titanium and silicon molecular sieve.

The invention discloses a device and a method for preparing high-purity tetrapropylammonium hydroxide and co-producing bromine through electrolysis. The method comprises the following steps: pumping and putting a tetrapropyl ammonium bromide solution of which the mass concentration is 45-55% in a raw material circulation tank into an anode chamber, meanwhile blowing air into the anode chamber through an air compressor, dehydrating the tetrapropyl ammonium bromide in the anode chamber to generate cation (CH3CH2CH2)4N<+> and anion Br<->, feeding the cation into a cathode chamber through a cation exchanger membrane, feeding the anion to an anode plate to generate gas phase bromine, feeding the gas phase bromine together with diluted tetrapropyl ammonium bromide into a gas-liquid separator for gas-liquid separation, feeding the diluted tetrapropyl ammonium bromide in the gas-liquid separator and separated liquid bromine into two bromine settling tank for switching and settling, mixing the diluted tetrapropyl ammonium bromide which contains a small amount of bromine at an upper layer with concentrated tetrapropyl ammonium bromide which is discharged from a concentrated tetrapropyl ammonium bromide tank into tetrapropyl ammonium bromide of which the mass concentration is 45-55%, and feeding the tetrapropyl ammonium bromide into the raw material circulation tank for further recycling and use, wherein the ionic concentration of the tetrapropylammonium hydroxide is less than 100ppm, and the content of metal ions is less than 20ppb.

The invention belongs to the field of medicinal chemistry, and discloses a technology for preparing aclidinium bromide. By adopting the technology, (R)-3-quinuclidinol, (C1)methyl-2,2-dithienyl glycolate and 3-phenoxy propyl bromide are taken as raw materials, and the aclidinium bromide is prepared by adopting a one-pot process. The method is simple to operate, and convenient for post-treatment, and has good application value.

This invention relates to improved stabilizing compositions for n-propyl bromide. More particularly, the cleaning composition includes about 0.1 to 5% Butylene oxide, about 0.1 to 5.0% t-butanol, about 0.1 to 5% acetonitrile, about 0.1 to 5% nitromethane; and the remainder n-propyl bromide. These mixtures are useful as cleaning solvents for the electronic, aerospace, and general manufacturing industries, especially in the area of vapor degreasing.

Disclosed is a composition comprised of n-propyl bromide and 1,1,1,3,3-pentafluorobutane. This invention also relates to cleaning solvent systems comprised of n-propyl bromide and 1,1,1,3,3-pentafluorobutane and methods for cleaning various solid substrates.

A method is described for producing n-propyl bromide of a high degree of purity, which contains isopropyl bromide in an amount lower than 0.1% w/w, and usually lower than 0.05%. The method is characterized in that n-propanol is reacted with HBr which is in gas form, preferably dry, and which is in excess over the stoichiometric amount, wherein the excess HBr is at the end of the reaction in an aqueous solution formed from the reaction water. The invention further relates to N-propyl bromide of high purity, containing typically less than 500 ppm of isopropyl bromide.

The invention belongs to the field of photoelectric materials, and discloses an organic electroluminescence device and a preparation method thereof. The device comprises an anode substrate, a hole injection layer, a hole transmitting layer, a luminous layer, an electron transmitting layer, an electron injection layer, a cathode layer, a protecting layer, a first anti-corrosion layer and a second anti-corrosion layer which are sequentially stacked; the first anti-corrosion layer and the second anti-corrosion layer wrap and package the anode substrate, the hole injection layer, the hole transmitting layer, the luminous layer, the electron transmitting layer, the electron injection layer, the cathode layer and the protecting layer which are sequentially stacked from inside to outside; the protecting layer is made from MgF2, NPB (nomal propyl bromide) or Alq3; the first anti-corrosion layer is made from ZnS or ZnSe; and the second anti-corrosion layer is made from PET (polyethylene terephthalate). After the organic electroluminescence device is eroded by wet air and moisture, water can be effectively prevented from permeating into the organic electroluminescence device, so that the ageing of materials of the internal functional layers of the organic electroluminescence device is reduced, and the service life of the organic electroluminescence device is prolonged.

The present invention relates to methods and chemical compositions utilizing NPB (n-propyl bromide) also called 1-bromopropane or propyl bromide or 1-BP or N-Bromopropane as non-aqueous carrier mediums to apply fire retardants, fluorocarbons and other chemicals to substrates, whereby the NPB is evaporated away leaving the remaining chemicals on the substrate. The present invention offers compositions and method for applying organic chemicals to substrates that perform superior to current water based technology. Additional, the invention offers a more economical and environmental friendly alternative to current chlorinated hydrocarbons carriers that are being phased out by mandate of the Environmental Protection Agency (EPA).

The invention relates to an environment-friendly cleaning agent. The environment-friendly cleaning agent comprises the raw materials of, by amount, 94%-95% of n-propyl bromide, 3%-4% of n-propyl alcohol, 0.2% of nitromethane, 0.8% of 1,3-dioxolame, 0.7% of epoxybutane and 0.3% of BHT. The cleaning agent has the advantages of low ozone destructive index, low earth warming effect, good environment-friendly effect, high penetration, easily cleaning capacity for micro-porous materials, fast drying speed, low hydrolysis degree, stable gas-liquid phase change, etc. The cleaning agent can be used for steam washing and distillation recovery.

The invention relates to an organic ultraviolet light detection device of a visible blind area, which takes Cu (I) coordination compound triplet-state materials with high electron transmission performance as electron acceptor components. The organic ultraviolet light detection device comprises an ITO (Indium Tin Oxid) conducting glass layer, an electron donor layer, a donor and acceptor material mixing layer, an electron acceptor layer, an electron injection layer (LiF (Lithium Fluoride)) and an Al cathode layer, wherein the donor and acceptor material mixing layer is formed by respectively mixing and depositing the Cu (I) coordination compound triplet-state materials with TPD and NPB (n-Propyl Bromide) or m-MTDATA; and the electron acceptor layer adopts the Cu (I) coordination compound triplet-state materials. The invention greatly improves the performance of the organic ultraviolet light detection device by using novel electron acceptor materials.

The invention provides an o-cresol isomerization catalyst. The o-cresol isomerization catalyst comprises, by mass, 65%-95% of H-type MCM-41/ZSM-5 composite molecular sieves and 5%-35% of binders. The invention further provides a preparing method of the o-cresol isomerization catalyst and a method for catalyzed synthesis of a mixture of m-cresol and p-cresol through the o-cresol isomerization catalyst. The preparing method of the o-cresol isomerization catalyst includes the steps that a silicon source, an aluminum source and the like serve as raw materials firstly, hexa decyl trimethyl ammonium bromide and tetra propyl ammonium ammonium bromide serve as templates under the alkaline condition so as to synthesize Na-type composite molecular sieves with a two-step crystallization method, then the H-type composite molecular sieves are synthesized through ion exchange, and finally the H-type composite molecular sieves and the binders are mixed and molded. The o-cresol isomerization catalyst has the higher activity and the higher stability, and the selectivity of the mixture of the m-cresol and the p-cresol can be obviously improved, and the o-cresol isomerization catalyst is suitable for a fixed bed reactor.

The invention discloses a communication equipment electrified cleaning agent, which is characterized by comprising the following raw materials by weight: 78-82% of n-propyl bromide, 4-6% of cyclohexane, and 14-16% of ethanol absolute. The raw materials are loaded into a stirring tank to undergo reaction for 2-3h at 10DEG C-20DEG C and under atmospheric pressure, thus obtaining the communication equipment electrified cleaning agent. The communication equipment electrified cleaning agent provided by the invention has the advantages of: simple formula, no environmental pollution, convenient use, high insulation value up to 1.1*10<11> Ohm, safety and reliability.

An anti-spatter formulation, for use in all manner of cutting, welding or grinding of metal materials, and specifically for providing a liquid barrier that withstands sparks, to protect the metal material from all manner of adhesion and damage by liquid molten metal or sparks, also known as spatter or splatter. The anti-spatter formulation includes lecithin and the anti-spatter formulation is applied to a metal surface to form a barrier. The metal surface is protected by the barrier, from a spark and spatter damage. The anti-spatter formulation of claim is preferably a soy derived lecithin, and additionally mixed with n-propyl bromide.

The invention discloses a preparation method of sodium n-propyl thiosulfate. The preparation method of sodium n-propyl thiosulfate comprises the following steps: adding sodium thiosulfate pentahydrate in a high-speed shearing reactor, and dissolving sodium thiosulfate pentahydrate with equivalent distilled water, wherein the rotation speed of the high-speed shearing reactor is 6000-10000 r/min; and then adding polyethylene glycol 400 and n-propyl bromide, and reacting through heating and refluxing. The preparation method has the beneficial effects that a sodium thiosulfate aqueous solution reacts with n-propyl bromide, wherein the former is the aqueous solution, and the latter is an organic phase, so the sodium thiosulfate aqueous solution is immiscible with the organic phase; and polyethylene glycol 400 is a phase transfer catalyst so that the two phases which are immiscible originally are miscible in a certain degree, thereby effectively promoting the reaction to conduct, reducing the amount of polyethylene glycol 400, saving cost and shortening reaction time.

The invention discloses a method for preparing cyclopropylboric acid. The method comprises the following steps: reacting cyclopropyl bromide with magnesium reagents to generate cyclopropylmagnesium bromide which then reacts with 1-substituent boronic acid pinacol ester to prepare cyclopropylboric acid. The raw materials for the method are easy to obtain, the operation is easy, the method is safe and environment-friendly, the cost is low, and the yield is high. The innovation includes that hazardous materials such as lithium metal and diethyl ether in the literature are avoided; and cyclopropylmagnesium bromide and 1-substituent boronic acid pinacol ester are taken as the raw material to synthesize cyclopropylboric acid with a high yield under the room temperature condition, therefore the raw material risk is small, the reaction conditions are mild, the yield is high, and the environment is not polluted.

The invention discloses a quercetin derivative and a preparation method and application thereof. The preparation method comprises the following steps: firstly using dichlorodiphenylmethane to protect quercetin o-diphenol hydroxyl, combining a benzyl protection group to obtain the selectively protected quercetin derivative, and then independently reacting with dimethyl sulfate, diethyl sulfate, allyl bromide, paratoluensulfonyl chloride and acetic anhydride respectively to generate corresponding quercetin derivatives. All of the prepared derivative compounds have NRK-49F proliferation activity inhibition superior to that of quercetin. The quercetin derivatives 20a-1, 14a-1 and 23d-1 compositely replaced by methyl and p-tosyl have higher inhibition NRK-49F proliferation activity, and the inhibition ratio respectively reaches 86.33%, 78.04% and 75.91%. Thus, the currently obtained quercetin derivative compounds have obvious inhibition effect on kidney fibroblast NRK-49F proliferation.

An MgZnO/NPB ultraviolet light detector and a producing method thereof belong to the field of optoelectronic information, are mainly used for ultraviolet light detectors which generate low bias voltage and high response and solve the problems of inorganic wide band-gap semiconductor p-type doping and low organic electronic mobility. The detector is composed of a single phase MgxZn1-xO film which is grown on a quartz indium tin oxide (ITO) substrate, a NPB film, an LiF film and an electrode. The producing method thereof comprises that the quartz ITO substrate is pretreated in a molecular beam epitaxy (MBE) growth chamber; the MgxZn1-xO film with the thickness of 200-300nm is grown at the growth temperature of 400-500 DEG C inside the MBE growth chamber, and x=0.1-0.4; then thermal evaporation is conducted, and the NPB film with the thickness of 50-120nm is grown on the MgxZn1-xO film; the LiF electrode modification layer with the thickness of 0.5-2nm is grown on the NPB film; and the electrode is produced on the LiF electrode modification layer, so that the MgZnO/NPB ultraviolet light detector having a quartz ITO/MgxZn1-xO/NPB/LiF/electrode structure is produced.

The invention discloses a hand sanitizer. The hand sanitizer is prepared by mixing the following ingredients in percentage by weight: 0.4-0.6% of a yeast element, 3% of bamboo vinegar powder, 4% of sodium hexametaphosphate, 4% of propyl bromide, 4% of olive fruit oil, 0.3-0.4% of glyceride citrate, 0.2-0.3% of aloe powder, 10-20% of chlorhexidine hydrochloride, 0.5-0.7% of alkyl amino acetate, and the balance of deionized water. The hand sanitizer disclosed by the invention is reasonable in formula, low in cost, remarkable in sterilization and decontamination effects, and non-irritant to skin.

The present invention relates to azeotropic or azeotrope-like compositions comprising a fluorinated olefin having the formula E- or Z-C₃F₇CH═CHC₃F₇, and at least one alcohol, halocarbon, hydrofluorocarbon, fluoroether, or alkanes and combinations thereof. In one embodiment, the one compound selected from the group consisting of alcohols, halocarbons, fluoroalkyl ethers, hydrofluorocarbons, alkanes is either methanol, ethanol, iso-propanol, n-propanol, trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, n-propyl bromide, C₄F₉OCH₃, C₄F₉OC₂H₅, HFC-43-10mee, HFC-365mfc, heptane, or combinations thereof. In another embodiment, these compositions are useful in cleaning applications as a degreasing agent or defluxing agent for removing oils and/or other residues from a surface.