Method for preparing high-purity insoluble sulphur by using secondary purification method

Abstract

A method for preparing high-purity insoluble sulphur by using a secondary purification method comprises a washing process and a separating process in traditional technology, and is characterized in that the method adds a secondary washing process and a secondary separating process after the washing process and the separating process, so that the ordinary insoluble sulphur obtained through the washing process and the separating process in the traditional technology can be purified for a second time to get the high-purity insoluble sulphur. Through employing the secondary washing and separating to purify, the high-purity insoluble sulphur prepared by the invention has an insoluble sulphur content of 95 to 99%, so that the technical requirements of the high-purity insoluble sulphur is fully met, production efficiency of producing the high-purity insoluble sulphur is increased by more than 20 %, and energy consumption is reduced by more than 10 %. The method is suitable for preparing the high-purity insoluble sulphur through a melting preparation method.

Description

[0001] technical field [0002] The invention relates to a method for preparing high-purity insoluble sulfur by a secondary purification method, which belongs to the technology for preparing insoluble sulfur. Background technique [0003] The traditional "melting method to obtain insoluble sulfur technology" is to obtain insoluble sulfur with a certain purity by melting, quenching, aging, washing, separating and drying ordinary sulfur. In the process of "preparation of insoluble sulfur by melting method", the washing process and separation process are to wash the mixture of insoluble sulfur and ordinary sulfur obtained after quenching and aging, and dissolve the ordinary sulfur from the mixture to realize the insoluble sulfur and ordinary sulfur. Two key processes of separation, but since the material entering the washing process is a mixture of insoluble sulfur and ordinary sulfur crushed into pieces, under the premise that the mixture of insoluble sulfur and ordinary s...

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Problems solved by technology

[0005]However, when using this method of prolonging the washing time, due to the large amount of carbon disulfide dissolved in ordinary sulfur produced in the washing work area after the washing process has been carried out for a certain period of time, The solution will dilute the newly added carbon disulfide, reduce the dissolving ability of carbon disulfide to ordinary sulfur, and make the time for carbon disulfide to dissolve ordinary sulfur longer and slower, which not only reduces production efficiency, but also increases energy consumption

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