Method for preparing nano insoluble sulphur

Abstract

The invention discloses a method for preparing nano insoluble sulphur, which comprises the following steps: (1), melting the sulphur, namely adding solid sulphur or liquid sulphur into a sulphur melting pool to melt the sulphur; (2), raising temperature, namely pumping the melted liquid sulphur into a temperature rise tank with a sulphur pump or a metering pump; (3), quenching, when the temperature reaches a gasifying temperature, opening a CS2 solvent nozzle jet valve to make the jetted solvent like curtain or heavy fog and then opening a sulphur vapour nozzle valve; (4), flushing, namely when the mixed liquid in a flushing container tank reaches a given volume, closing a connection port valve, disconnecting a connector, rotating the container tank to stir, discharging the turbid liquid and pumping in a fresh liquid; and (5), filling oil and packing. The method of the invention has the advantages of not crushing the product, shortening the production process, reducing the production cost, optimizing the production environment and improving the product quality.

Description

technical field [0001] The invention relates to a preparation method of insoluble sulfur, in particular to a preparation method of nanoscale insoluble sulfur. Background technique [0002] Insoluble sulfur is a polymer of sulfur, which is a chain free radical monomer with unsaturated sulfur atoms at both ends after melting and heating (280?C~700?C) to stimulate the sulfur ring to open. The free radical monomer is very easy to carry out reversible polymerization reaction to generate chain polymers of different lengths. This polymer is insoluble in solvents that ordinary sulfur can dissolve, so it is called insoluble sulfur (I s ), in recent years, some domestic manufacturers have used the solvent one-step method and the continuous one-step method to prepare insoluble sulfur. Although the quality has been improved compared with the water-phase method, there are still problems that are difficult to solve: ①Their differences in process design The sulfur injection pipes are all ...

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Problems solved by technology

[0002] Insoluble sulfur is a polymer of sulfur, which is a chain free radical monomer with unsaturated sulfur atoms at both ends after melting and heating (280?C~700?C) to stimulate the sulfur ring to open. The free radical monomer is very easy to carry out reversible polymerization reaction to generate chain polymers of different lengths. This polymer is insoluble in solvents that ordinary sulfur can dissolve, so it is called insoluble sulfur (I s ), in recent years, some domestic manufacturers have used the solvent one-step method and the continuous one-step method to prepare insoluble sulfur. Although the quality has been improved compared with the water-phase method, there are still problems that are difficult to solve: ①Their differences in process design The sulfur injection pipes are all connected to the middle and lower part of the heating container, so that the sprayed sulfur is all liquid sulfur. Wait for a period of time to move it by external force. After solidification, it will be coarsely crushed first, and then crushed after drying; ②Because the crushing of dried solid insoluble sulfur requires manpower and equipment, it is time-consuming and expensive, and there must be a good dust recovery and environmental protection device. In the crushing process, if there is friction and static electricity mixed with hard impurities and dust, crushed dust explosion accidents occur from time to time; ③The insoluble sulfur crushed by artificial machinery and the naturally formed nano-sized particle insoluble sulfur are different in quality and dispersion performance is incomparable

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