231 results about "Peroxy acid" patented technology

A method of chemically modifying carbon nanotubes having a diameter less than one micron comprising: contacting the nanotubes with a peroxygen compound selected from the group consisting of organic peroxyacids, inorganic peroxoacids and organic hydroperoxides, or a salt thereof, under oxidation conditions and thereby producing modified carbon nanotubes. Oxidation of the nanotubes increases the degree of dispersion of aggregates of nanotubes and aids in the disassembling of such aggregates. The dispersed nanotubes are used to prepare rigid structures and can be used in electrodes and capacitors.

The present invention provides a method for producing hydrocarbon fuels with ultra-low levels of sulfur. The method involves catalytic oxidation of the sulfurous compounds within the hydrocarbon fuel, followed by extraction of the oxidized (and polarized) sulfurous compounds using a polar solvent. The present invention teaches the involvement of ethanol during catalytic oxidation. In this way, the oxidation catalyst has a dual-role in the oxidation process: firstly the catalyst directly oxidizes the sulfurous compounds, and secondly the oxidation catalyst converts of a small portion of the alcohol to the corresponding peroxy acid, which also helps to drive the oxidation process.

Disclosed is a process for the pretreatment of a plant fluid effluent containing odor compounds including an alkyl mercaptan or an alkyl thiol, an amine compound, ammonia, hydrogen sulfide and mixtures thereof by contacting the plant effluent with an atomized aqueous solution comprising a peroxy acid compound. When contacted with the peroxy acid, odor compounds in the effluent are oxidized and converted from the gaseous phase into a chemically modified highly aqueous soluble phase in the aqueous treatment. The use of such a process produces a significant improvement in odor quality index as measured by a conventional process using an expert panel when compared to conventional treatment methods.

The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms.

The invention relates to a continuous reaction technological method for preparing epsilon-caprolactone, and microchannel reaction equipment, belonging to the technical field of organic synthesis. The method takes cyclohexanone as initial reaction raw material and peracetic acid generated in the reaction of hydrogen peroxide and acetic anhydride as an oxidizing agent, and the processes such as peroxy acid preparation, cyclohexanone oxidation and the like are continuously completed in a microchannel reactor system. The continuous reaction technological method effectively controls the temperature in the reaction process, is high in safety, does not need an additional solvent, catalyst and stabilizing agent, is beneficial to separation and purification of caprolactone, and enables the high-yield continuous production of the epsilon-caprolactone to be possible; the microchannel reaction equipment provided by the invention highly meets the requirements of the reaction technology. The conversion rate of the cyclohexanone reaches 50-95%, and the selectivity of the epsilon-caprolactone is 80-100%.

The present invention discloses a process for continuous preparation of high purity epsilon-caprolactone, according to the process, a reaction and separation integrated apparatus is used for continuous preparation and separation of an organic peroxy acid and epsilon-caprolactone, wherein the reaction and separation integrated apparatus comprises a catalytic reaction rectifying column, a reaction rectifying column, a stirring reactor and a rectifying column which are in turn connected, and the process is as follows: an organic acid and hydrogen peroxide are introduced into the catalytic reaction rectifying column for oxidation reaction to separate water under catalysis of strong acid cation exchange resin, the organic peroxy acid produced by the reaction enters the reaction rectifying column, and a crude epsilon-caprolactone solution is obtained by oxidizing reaction of the organic peroxy acid and cyclohexanone entering form the middle part of the reaction rectifying column; and a high yield of the high purity epsilon-caprolactone can be continuously obtained by rectification separation of the crude epsilon-caprolactone solution. The process is simple in operation and mild in reaction conditions, and the product is stable in quality and can meet the industrial production.

We describe a process for the preparation of polyurethane polyol from CARDANOL 3-(8pentadecenyl)phenol, derived from cashew nut shell liquid (CNSL), a renewable resource material. The polyol is made by oxidation with peroxy acid generated in situ to give epoxidised CARDANOL 3-(8-pentadecenyl)phenol and the epoxy derivative is converted to the polyol in the presence of the organic acid. The cardanol-based polyol may be reacted with isocyanate to form polyurethane. Alternatively blowing agents are included with the cardanol-based polyol before it is reacted with the isocyanate. These polyols are especially suitable for making rigid foams of very low density and high compressive strength.

A lactone production method is characterized in that a reaction is performed in the presence of a catalyst with a molar ratio of cyclic ketone, a solvent, and hydrogen peroxide of 1:(0-80):(0.2-20) and a mass ratio of the catalyst and the cyclic ketone of 1:1-100 at a temperature of 5-75 DEG C and a pressure of 0.1-6.0 MPa, and lactone is obtained through recovery; the catalyst comprises a molecular sieve which is a titanium silicon molecular sieve with a MFI crystal structure; the crystal grain has a hollow structure, and the cavity part of the hollow crystal grain has a radial length of 5-300 nanometers; the molecular sieve sample has a benzene adsorption quantity of at least 70 mg / g under a condition with a temperature of 25 DEG C, P / P0 of 0.10, and adsorption time of 1 hour, and as for the low temperature nitrogen adsorption of the molecular sieve, a hysteresis loop exists between an adsorption isotherm and a desorption isotherm. Compared with the prior art, the invention overcomes the disadvantages of complex production process, equipment corrosion, potential safety hazard existence, and severe environment pollution for traditional peroxy acid oxidation methods.