30 results about "2-dichlorobenzene" patented technology

The invention provides imidazo[2,1-b]benzothiazole compounds and a synthesis method thereof. According to the technical scheme, a metal catalyst is not needed, imidazo[2,1-b]benzothiazole and derivatives thereof are prepared from 2-benzothiazolamine compounds and ketone through conversion with air or oxygen as an oxidizing agent and one or a mixture of the following components as an organic solvent only under the action of elemental sulfur S8: cyclohexane, toluene, chlorobenzene, 1,2-dichlorobenzene, pyridine, quinoline, triethylamine, NMP, DMF, DMAc, DMSO, 1,4-dioxane and the like. The difficulty that the metal catalyst or a starting material with relatively higher activity is needed in the conventional synthesis method of the imidazo[2,1-b]benzothiazole compounds is overcome, and the compounds are suitable for preparing various functional materials, bioactive molecules and drug molecules.

The invention discloses a method for catching and detecting static headspace gas chromatography electrons of eleven chlorobenzene compounds in water, which belongs to the field of a water pollution detection technology. Eleven chlorobenzene compounds are as follows: 1, 4-dichlorobenzene, 1, 3-dichlorobenzene, 1, 2-dichlorobenzene, 1, 3, 5-trichlorobenzene, 1, 2, 4-trichlorobenzene, 1, 2, 3-trichlorobenzene, 1, 2, 3, 4, 5-tetrachlorobenzene, 1, 2, 4, 5-tetrachlorobenzene, pentachlorobenzene and hexachlorobenzene. According to the method, a water sample containing 20% of sodium chloride is added into a 20mL of headspace bottle, an aluminium cover containing PTFE (polytetrafluoroethylene) is utilized to seal instantly, and 800 [mu] L of gas in a top space of the headspace bottle is taken to detect in a gaschromatograph after the headspace bottle added with the water sample is balanced with the vibrating speed of 500rpm for 30 min at 70 DEG C. A detection limit of the eleven chlorobenzene compounds is 0.0002-0.04 [mu] g / L, and the recovery rate is 83-116%. The method provided by the invention is environmentally friendly, free of organic solvent, simple to operate, wide in linear range, good in repeatability, high in recovery rate and is capable of quickly detecting the concentration of the chlorobenzene compounds in water.

The catalyst for electrochemical dechlorination of hydrocarbons, such as chlorobenzenes, is a d-block transition metal supported by rice husk ash (RHA), preferably rice husk ash-supported platinum or titanium. The catalysts are prepared from rice husk ash by the sol-gel method. In order to dechlorinate chlorinated organic compounds, such as 1,4-dichlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, and 1,2,4-trichlorobenzene, a capillary microreactor is at least partially filled with the d-block transition metal supported by rice husk ash catalyst, a buffer solution having a pH preferably between 7 and 10, and the chlorinated organic compound. An electrical potential of approximately 3 kV is then applied across the capillary microreactor to initiate the dechlorination reaction.

The invention provides antibacterial filter paper and a preparation method thereof, relating to the technical field of preparation of filter paper. The preparation method comprises the steps of firstly preprocessing the surface of filter paper by virtue of an amino functional group silane coupling agent, grafting styrene to the surface of the filter paper by taking CuBr / dipyridyl as a catalytic system and 1,2-dichlorobenzene as a solvent, and finally carrying out quaternization on the grafted filter paper by virtue of alkyl bromide, so as to obtain the antibacterial filter paper. The prepared antibacterial filter paper has strong antibacterial funcition and good durability, the defects that the antibacterial components are not uniform and are poor in adhesion property, the use period is short, and the like because formed filter paper is soaked and sprayed with an antibacterial agent in the prior art are overcome, and the antibacterial filter paper has remarkable promotional values.

Nanoparticles may be formed on a substrate by mixing precursor solutions deposited by an inkjet printer. A first solution is deposited on a substrate from a first inkjet print cartridge. Then, a second solution is deposited on the substrate from a second inkjet print cartridge. The solutions may be printed in an array of droplets on the substrate. Nanoparticles form when droplets of the first solution overlap with droplets of the second solution. In one example, the nanoparticles may be gold nanoparticles formed from mixing a first solution of 1,2-dichlorobenzene (DCB) and oleylamine and a second solution of gold chloride trihydrite and dimethyl sulfoxide (DMSO). The nanoparticles may be incorporated into optoelectronic devices.

A method for preparing hydrophobic gold nanoparticles includes adding 1,2-dichlorobenzene as a solvent to gold precursor and using oleylamine and oleic acid with volume ratio of 7.5:2.5 to 5:5 as surfactants. The size of the prepared gold nanoparticles can be controlled over a broad range and may be utilized in various fields such as bio-imaging, photonic crystallization, sensors, organic catalysts, surface enhanced raman spectrum, electronic devices, etc. Further, a method for colorimetric detection of a strong acid uses hydrophilic nanoparticles that are phase transited from the prepared hydrophobic gold nanoparticles. Up to 5 ppm of low content hydrochloric acid can be detected utilizing phase transited hydrophilic nanoparticles in the colorimetric detection method, and the gold nanoparticles that were used in the detection of strong acid can be reused without loss of activity through neutralization with bases.

The invention belongs to the technical field of detection methods, and discloses a five-wavelength ultraviolet spectrum method for evaluating reduction performance of metal catalysis reductant. The method includes the steps of 1, absorbancy-wavelength standard curves of 1,2-dichlorobenzene, chlorobenzene and benzene are drawn; 2, the characteristic absorption wavelength is determined according to the standard curves, and the absorbancy-concentration standard curve of all the substances at the characteristic wavelength position is drawn to determine the extinction coefficient; 3, a mathematical formula is set up; 4, the metal catalysis reductant is added into simulation wastewater containing 1,2-dichlorobenzene to react in a contact mode and stands, supernate is taken and scanned in a full-wavelength range, light absorption values at the 260 nm, 269 nm, 277 nm, 290 nm and 300 nm positions are recorded, the concentration of dichlorobenzene, chlorobenzene and benzene in the simulation wastewater is calculated, the reduction capacity of the catalysis reductant and the catalysis effect of the catalysis reductant under different reaction conditions are evaluated. The method is simple and capable of fast evaluating reduction performance of metal catalysis reductant.