39 results about "1-Bromopropane" patented technology

The present disclosure provides azeotropic and azeotrope-like compositions comprised of methylperfluoropentene ethers and at least one of methanol, ethanol, 2-propanol, hexane, heptane, trans-1,2-dichloroethylene, ethyl formate, methyl formate, HFE-7100, HFE-7200 and 1-bromopropane or combinations thereof. The present disclosure also provides for methods of use for the azeotropic and azeotrope-like compositions.

The invention relates to a preparation method of high-purity cinacalcet hydrochloride. The method comprises the following steps: using R(+)-1-naphthylethanamine and (3-(3-trifluoromethyl) phenyl)-1-bromopropane as starting materials, taking acetonitrile as a solvent, reacting under the action of alkali to get cinacalcet, acidifying a reaction solution in water with hydrochloric acid to get a cinacalcet hydrochloride crude product, and recrystallizing the crude product with ethyl acetate to get the high-purity cinacalcet hydrochloride. The method is simple to operate and suitable for industrialization.

The present invention relates to methods and chemical formulations 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 fluorocarbons and other chemicals to substrates, whereby the NPB is evaporated away leaving the remaining chemicals on the substrate. The present invention offers formula 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 discloses a synthesis process for sodium valproate. The synthesis process comprises the following steps: mutually dissolving diethyl malonate and 1-bromopropane, slowly adding the obtained mixture into an ethanol solution of sodium ethoxide at a certain temperature, carrying out heating and reflux for 2 h, recovering ethanol until temperature is 110 DEG C, carrying out cooling to less than 80 DEG C, adding a certain amount of water to dissolve sodium bromide, carrying out layering to obtain a plurality of layers, then adding an aqueous sodium hydroxide solution with a concentration of 15 to 30%, carrying out hydrolysis at 60 to 70 DEG C for 3 h, then carrying out heating to recover ethanol until a gas phase temperature is 99 DEG C, carrying out cooling to less than 80 DEG C, adding hydrochloric acid for neutralization and acidifying, adding crude valproic acid to dissolve dipropylmalonic acid so as to obtain mixed acid and subjecting the mixed acid to slow heating and decarboxylation at 110 to 160 DEG C for production of crude valproic acid; and subjecting the crude valproic acid to rectification and refining, adding a certain amount of the aqueous sodium hydroxide solution for neutralization, adding toluene for reflux to bring out water, thereby allowing sodium valproate to dehydrate and crystallize and then successively carrying out filtering, washing with chloroform and drying so as to obtain finished sodium valproate. The process is safe and environment-friendly, produces good-quality sodium valproate, has low cost and is suitable for industrial production.

The invention discloses a method for asymmetrically catalyzing and synthesizing (S)-curcumene. According to the method, racemization 2-halogenated propionate ester serves as a starting material, under the catalysis of bis oxazoline / cobalt, an asymmetrical Kumada cross coupling reaction is conducted, and (R)-2-p-methylphenyl propionate is obtained; then, (R)-2- p-methylphenyl-1-bromopropane is generated through reduction and bromine generation; next, coupling with vinyl Grignard reagent is conducted, borohydride-oxidation and Dess-Martin oxidation are conducted, and (S)-4-p-methylphenyl valeraldehyde is obtained; finally, a Wittig reaction is conducted, and (S)-curcumene is synthesized. The method is simple and concise in synthesis route, the total yield is 37%, and the optical purity of a product is 90%.

The present invention provides a method comprising, mixing at least one phenol with a 1-bromopropane product mixture to form a phenol-containing 1-bromopropane product mixture, and obtaining the phenol-containing 1-bromopropane product mixture The purified 1-bromopropane product is recovered from the mixture. The present invention also provides a process for the preparation of a 1-bromopropane product mixture from 1-propanol and hydrogen bromide, characterized in that at least one phenol is mixed with the 1-bromopropane product mixture to form a A 1-bromopropane product mixture of phenol, and a purified 1-bromopropane product recovered from the phenol-containing 1-bromopropane product mixture.

Azeotrope-like compositions comprising 1-bromopropane and 1,1,1,2,3,3-hexafluoro-3-methoxy-propane, and uses thereof, are described.

The invention discloses a household disinfection solution, which is prepared from the following raw materials by mass: 7-11 parts of potassium iodide, 3-5 parts of triclosan, 5-7 parts of polyoxyethylene alkyl phenyl ether, 8-10 parts of chlorhexidine hydrochloride, 4-6 parts of alkyl amino acetate, 5-6 parts of 1-bromopropane, 3-4 parts of olea europaea fruit oil, 6-8 parts of ethoxyl lauryl ether, 8-9 parts of sodium dodecyl benzene sulfonate, 6-9 parts of sodium hypochlorite, 13-15 parts of potassium hydroxide, 5-7 parts of essence, and 30-40 parts of water. The household disinfection solution provided by the invention has the characteristics of long bactericidal and antibacterial duration, no irritating smell, safety and reliability, economic efficiency and environmental protection.

An environment-friendly cleaning agent, wherein, the environment-friendly cleaning agent comprises: raw materials in terms of consumption, n-bromopropane 94%-95%; n-propanol 3%-4%; nitromethane 0.2%; 1,3-diox Pentacycline 0.8%; Butylene oxide 0.7%; BHT 0.3%. The invention has low ozone destruction index, low global warming effect, good environmental protection effect, high cleaning efficiency, high penetration, easy cleaning of microporous materials, fast drying speed, no flash point, low degree of hydrolysis, gas-liquid The phase change is stable, and it can be applied to steam cleaning and distillation recovery.

The invention provides a method of improving the stability for 1-bromopropane. The method comprises: (1) filling the package vessel of the 1-bromopropane product with nitrogen; replacing air; preventing the 1-bromopropane product from oxygenation; (2) filling the vessel of step one with the 1-bromopropane product; (3) filling the 1-bromopropane product which is obtained from step two with ethylhexyl sebate (2,2,6,6-tetramethyl pyridyl) which is 1 to 5 thousandths of the quality thereof in order to prevent the 1-bromopropane product from decomposition and discoloration. The invention can isolate air and prevent the 1-bromopropane product from oxygenation. Alkyl radical can be captured effectively. The 1-bromopropane product is prevented from decomposition and discoloration. The stability of the 1-bromopropane product can be improved.

This invention provides a process which comprises mixing permanganate with a 1-bromopropane product mixture to form a permanganate-containing 1-bromopropane product mixture, and recovering a purified 1-bromopropane product from said permanganate-containing 1-bromopropane product mixture. This invention also provides a process for preparing a 1-bromopropane product mixture from 1-propanol and hydrogen bromide, characterized by mixing permanganate with the 1-bromopropane product mixture to form a permanganate-containing 1-bromopropane product mixture and recovering a purified 1-bromopropane product from said permanganate-containing 1-bromopropane product mixture.

An anti-corrosion and water-repellent substance configured for application to surfaces of materials to prevent corrosion and otherwise protect those materials. The substance consists of 1-bromopropane, nitromethane, ethyloxirane, and highly refined paraffin wax. In a preferred embodiment of a method of treating materials, the anti-corrosion and water-repellent substance is sprayed on a surface. In other embodiments, the substance may be applied with a brush or roller. In yet another embodiment, the substance may be applied by immersing the items being treated for optimal coverage of their exposed surfaces. The substance adheres to various materials and protects them by repelling water, acids, salt brines, and other substances and elements, including corrosives.

The present invention provides a solvent composition comprises isopropyl bromide and / or normal propyl bromide and one or two or more kinds of nitroalkane in an amount of 15-40 wt.% based on the whole amount.

The invention discloses a method for asymmetrically catalyzing and synthesizing (S)-curcumene. According to the method, racemization 2-halogenated propionate ester serves as a starting material, under the catalysis of bis oxazoline / cobalt, an asymmetrical Kumada cross coupling reaction is conducted, and (R)-2-p-methylphenyl propionate is obtained; then, (R)-2- p-methylphenyl-1-bromopropane is generated through reduction and bromine generation; next, coupling with vinyl Grignard reagent is conducted, borohydride-oxidation and Dess-Martin oxidation are conducted, and (S)-4-p-methylphenyl valeraldehyde is obtained; finally, a Wittig reaction is conducted, and (S)-curcumene is synthesized. The method is simple and concise in synthesis route, the total yield is 37%, and the optical purity of a product is 90%.