5 results about "Sulfur tetrafluoride" patented technology

The invention relates to a method and device for continuously synthesizing o-trifluoromethyl benzoic acid, and the method comprises the following steps: step 1, fluorination reaction: anhydrous hydrogen fluoride, o-methyl benzoic acid and sulfur tetrafluoride are pumped into a first-stage dynamic tubular reactor, and are subjected to fluorination reaction in the first-stage dynamic tubular reactor to generate o-methylbenzotrifluoride; then carrying out gas-liquid separation on the reaction liquid to obtain an o-methylbenzotrifluoride intermediate; and 2, oxidation reaction: pumping an organic solvent, an oxidant and o-methylbenzotrifluoride into a secondary dynamic tubular reactor, carrying out oxidation reaction in the secondary dynamic tubular reactor to generate o-trifluoromethyl benzoic acid, and carrying out gas-liquid separation on the reaction liquid to obtain the o-trifluoromethyl benzoic acid product. The method has the advantages of easily available raw materials, low cost, short reaction steps, simple operation process, high yield, few byproducts, high purity, realization of industrial production, reduction of the discharge amount of wastewater and waste liquid, and reduction of the environmental protection pressure.

The invention belongs to the field of synthesis of molybdenum dioxide dichloride, and particularly relates to a synthesis method of molybdenum dioxide dichloride. Comprising the following steps: S1, pretreating a molybdenite raw material; s2, the pretreated molybdenite raw material is placed in a reactor, chlorine trifluoride, oxygen, fluorine mixed gas and inert gas are introduced into the reactor and react with the pretreated molybdenite raw material at the reaction temperature of 20-50 DEG C, and a crude product of dichloromolybdenum dioxide and a crude product of sulfur tetrafluoride are generated; and collecting a dichloromolybdenum dioxide crude product from the bottom of the reactor. The raw ore molybdenite is used as the molybdenum raw material, the cost of the synthesis process is reduced, the process route is simple, and the reaction conditions are milder; in addition, the byproduct sulfur tetrafluoride in the invention is a product with high added value.

The present invention discloses an inflatable ring network cabinet, including a cabinet, a switch, a one-way inflation valve, a primary condensation cover, a locking mechanism, a pressure plate, an insulation block, a silicone rubber pad, a thermally conductive copper pad, a heating electrode, a secondary condensation cover, a thermally insulating sleeve, an outer sleeve, a sponge block, an inner copper tube, a converging channel, an explosion-proof mechanism, a spherical cap, and a capillary. When started, the heating electrode heats the thermally conductive copper pad, and the heated copper pad quickly transfers heat to the inner copper tube, and the inner copper tube heats the sponge block and activated carbon powder to vaporize the liquid stored therein, and the vaporized gas is ejected along the air jet hole, so that the cabinet is filled with sulfur tetrafluoride gas, ensuring the reliability of the switch operation. The explosion-proof mechanism can release the pressure when the pressure in the cabinet increases sharply, prevent the cabinet from exploding under high pressure, and improve the safety performance. The device has a simple structure, can vaporize sulfur tetrafluoride after condensation, ensure a safe environment in the cabinet, and improve the safety performance. At the same time, an explosion-proof design is adopted to improve the safety performance of the cabinet.

The utility model provides a kind of device of multistage rectification purification sulfur tetrafluoride, can realize rectification purification of sulfur hexafluoride while rectification purification sulfur tetrafluoride, the device further includes heavy component column, the upper middle part of heavy component column is equipped with secondary feed inlet, its bottom is equipped with secondary liquid outlet, its upper part is equipped with secondary gas outlet, secondary condenser is installed on the upper part of heavy component column, main liquid outlet is communicated with secondary feed inlet by intermediate pipe, material pump is equipped on intermediate pipe, heater is installed on intermediate pipe between material pump and heavy component column, main gas outlet is communicated with sulfur tetrafluoride storage tank by main collecting pipe, secondary gas outlet is communicated with sulfur hexafluoride storage tank by secondary collecting pipe, secondary liquid outlet is communicated with residual liquid tank by residual liquid collecting pipe, improve economic value, using gaseous material precooling treatment, can improve the promotion efficiency of sulfur tetrafluoride.