Sodium Hydrosulfide Is An Important Chemical Raw Material:
Sodium hydrosulfide solution is a very important chemical raw material. The fertilizer industry is used to remove sulfur from desulfurizers, the dye industry is mainly used as an auxiliary for synthesizing organic intermediates and preparing sulfide dyes, and the leather industry is used for dehairing and tanning of raw hides. It is also a raw material for manufacturing ammonium sulfide, ethanethiol, mercaptopropionic acid, and polyphenylene sulfide, playing an important role in organic synthesis and waste treatment.
Sodium Hydrosulfide Is Easy To Remove Odors And Has Economic Value:
A method for removing the odor of sodium sulfide solution is provided for the preparation of sodium sulfide from industrial hydrogen sulfide, especially for the process of preparing sodium sulfide from petrochemical acidic gas. Industrial hydrogen sulfide, especially hydrogen sulfide from petrochemical acidic gas sources, contains some odorous organic and inorganic impurities (such as aromatic substances, saturated hydrocarbons, sulfur-containing compounds, etc.), which are difficult to remove. The sodium hydrosulfide prepared from this hydrogen sulfide has an unpleasant odor, which affects product quality. Using this method not only simplifies the process operation and requires low equipment requirements, but more importantly, it improves the quality of industrial sodium sulfide solution and further enhances its practical value, greatly meeting the requirements of customers and the market, and has significant social and economic value.
Specific Plan:
The specific technical scheme adopted is to add a composite adsorbent (one or more of activated carbon, carbon fiber, and industrial grade multi walled carbon nanotubes) with a mass of 0.5% -1% of sodium sulfide solution to the industrial production of sodium sulfide solution. Stir and react at 30 ℃ -60 ℃ for 2-5 hours, then filter to obtain an odorless sodium sulfide solution; Among them, the composite adsorbent is composed of the following components: by weight, adsorbent: 1 part, modifier (crown ether type modifier, selected from any one of 12-crown ether-4, 15-crown ether-5, 12-crown ether-4, 2,2-dimethyl-15 crown ether-5): 2-5 parts; The preparation method is to disperse the adsorbent in the modifier, stir at 30-40 ℃ for 30-60 minutes, filter, and then dry at 30 ℃ to obtain a composite adsorbent. After modification, the adsorption capacity of the composite adsorbent becomes more prominent, with a significant increase in adsorption speed and amount, reducing treatment time and adsorbent usage. At the same time, it does not affect the content of sodium hydrosulfide or introduce other impurities. The composite adsorbent can be removed by filtration.
The method treats sodium thiohydride with almost no effect on its content, and effectively adsorbs odorous substances such as aromatics, saturated hydrocarbons, and sulfur-containing compounds, ensuring that the obtained sodium thiohydride has no odor and improving the value of industrial sodium thiohydride.
