Isopropyl alcohol

About: Isopropyl alcohol is a research topic. Over the lifetime, 3064 publications have been published within this topic receiving 27354 citations. The topic is also known as: Rubbing Alcohol & Propan-2-ol.

Dimerization and Rearrangement of Diphenylcyclopropenone

Abstract: The reaction of diphenylcyclopropenone with cyclopentadienylmagnesium bromide did not give the expected tertiary carbinol, but resulted in the formation of tetraphenylcyclopenta-dienone, tetraphenyl-p-benzoquinone, and tetraphenylpyrocatechol in 1%, 2%, and 8% yields respectively. When diphenylcyclopropenone was treated with a mixture of metallic magnesium and iodine, the same products were obtained in increased yields. Similarly, the treatment of diphenylcyclopropenone with sodium amalgam in isopropyl alcohol - acetic acid gave tetraphenyl-p-benzoquinone and tetraphenylpyrocatechol in 4% and 20% yields respectively. These results suggest that diphenylcyclopropenone gives pinacol, 1, l′-dihydroxy-2, 2′, 3, 3′-tetraphenyl-l, l′-bi-cyclopropenyl, under the reaction conditions, but the pinacol is too unstable to be isolated and rearranges to the benzene derivatives.

Calcium chloride cross-linked sodium alginate nanometer fiber scaffold material and preparation method thereof

Abstract: The invention relates to a calcium chloride cross-linked sodium alginate nanometer fiber scaffold material and a preparation method thereof The material comprises sodium alginate and polyvinyl alcohol according to a ratio of the sodium alginate to the polyvinyl alcohol of 5:5-9:1, wherein the average diameter of the nanometer fiber membrane fibers is 50-200 nm, the breaking strength is greater than 1 MPa, and the water absorption rate is greater than 70% According to the present invention, the calcium chloride is used to cross-link the sodium alginate solution so as to improve the spinnability of the sodium alginate, the isopropyl alcohol content in the electrostatic spinning liquid is controlled at less than or equal to 5 wt% through assisted uses of a surfactant TX-100 and a co-solvent ethanol, the isopropyl alcohol can be removed during the final nanometer fiber membrane cross-linking treatment process, and the finally obtained sodium alginate nanometer fiber scaffold material can completely meet the use requirements of tissue engineering

Continuous single vessel distillation and adsorption process

Abstract: The present invention is a process for separating at least a first component from a second component of at least a first stream within a single vessel having at least one distillation zone and an adsorption zone. The invention may be applied to separates an alcohol from a mixture of the alcohol and water, such as separating isopropyl alcohol from a mixture of isopropyl alcohol and water. The invention may be applied to more complex systems such as separating isopropyl alcohol and separating diisopropyl ether from the effluents of each reactor of a two-stage diisopropyl ether production process. The benefit of the invention is a high purity separation process at reduced capital equipment costs.

Composition comprising mixture of dna fragments separated from fish's testis for regenerating cartilage

Abstract: PURPOSE: A composition for cartilage regeneration including a DNA fragment mixture separated from fish testis is provided to increase lubrication and buffering effects of cartilage when injected in a joint due to high viscosity by including a DNA fragment mixture with a molecular volume in a specific range. CONSTITUTION: A composition for cartilage regeneration comprises a DNA fragment mixture with a molecular weight of 3,000-10,000 kDa separated from fish testis. A fish is a fish of a salmon family. A manufacturing method of the composition for cartilage regeneration comprises a step of obtaining fraction liquid of the DNA fragment mixture with a molecular weight of 3,000-10,000 kDa from a gel filtration filter liquor; a step of precipitating the DNA fragment mixture by stirring after adding isopropyl alcohol or ethanol to filter liquor; and a step of dehydrating and drying the DNA fragment mixture after washing the same with an ethanol water solution or isopropyl alcohol. [Reference numerals] (AA) (First process) Step of defrosting fish testis and removing blood and foreign materials; (BB) (Second process) Step of putting refined water into the defrosted fish testis, pulverizing, and manufacturing testis pulverized liquid; (CC) (Third process) Step of mixing the testis pulverized liquid of the second process and a sodium chloride aqueous solution, reacting while stirring, and cooling; (DD) (Fourth process) Step of adding a sodium hydroxide aqueous solution into the cooled reactant liquid of the third process, adjusting into pH 10-12, stirring, filtering, and obtaining filtered liquid; (EE) (Fifth process) Step of adding hydrochloric acid into the filtered liquid of the fourth process to be pH 6.5-8.5, reacting, cooling, filtering, and obtaining filtered liquid containing a DNA fragment mixture; (FF) (Sixth process) Step of gel filtering the filtered liquid of the fifth process and obtaining fraction liquid of the DNA fragment mixture of 3,000-10,000kDA molecular weight; (GG) (Seventh process) Step of adding isopropyl alcohol or ethanol into the filtered liquid of the sixth process, stirring, and precipitating a DNA fragment mixture; (HH) (Eighth process) Step of washing the DNA fragment mixture of the seventh process with an ethanol aqueous solution or isopropyl alcohol, dehydrating, and drying

Fortified glutaraldehyde disinfectant

Abstract: A highly fortified glutaraldehyde formulation is provided consisting of guaternary ammonium chloride; glutaraldehyde; para tertiary amylphenol; citric acid, isopropyl alcohol, and water to form a concentrated formulation which may be diluted as requested.