Industrial sodium hydrosulfide liquid is an inorganic compound with the chemical formula NaHS. It is usually a colorless or light yellow liquid with a strong pungent odor. It is an important industrial raw material widely used in multiple fields. Chemical properties and applications: Industrial sodium hydrosulfide liquid is alkaline in chemical properties and easily soluble in water and alcohols. Its main applications include: dye industry: used as an auxiliary for synthesizing organic intermediates and preparing sulfurized dyes. Leather industry: used for depilation and tanning of raw hides. Fertilizer industry: used to remove monomer sulfur from activated carbon desulfurizers. Mining industry: extensively used for copper ore beneficiation. Artificial fiber production: used for dyeing and other wastewater treatment: used for wastewater treatment, etc.
A. What Are The Steps To Make Sodium Hydrosulfide Liquid Into Flakes?
a. Concentrated sodium hydrosulfide solution: First, concentrate the sodium hydrosulfide aqueous solution to a concentration of 68-72% and maintain a temperature of not less than 70°C.
b. Thermal insulation treatment: The concentrated sodium hydrosulfide solution is subjected to thermal insulation treatment to maintain its suitable temperature for the subsequent film making process.
c. Cooling film making: Send the insulated sodium hydrosulfide solution to the rotating drum surface of the drum intercooled film making machine. Cooling water is introduced into the intercooler holes of the drum, allowing the sodium hydrosulfide solution to cool and solidify on the surface of the drum.
d. Scraper packaging: Use a scraper to scrape off the sodium hydrosulfide on the surface of the drum, forming irregular sheet-like sodium hydrosulfide. The thickness of the scraped sheet shaped sodium hydrosulfide is about 0.5-2.0mm, and then the sheet shaped sodium hydrosulfide is sealed and packaged using packaging bags according to common methods.
e. Environmental Control: In order to ensure the normal operation of the film making machine and the normal solidification of sodium hydrosulfide solution on the drum surface, it is necessary to control the temperature of the film making machine’s working environment to not exceed 18 ° C and the relative humidity to not exceed 80%.
B. What Should Be Noted During The Process Of Making Sodium Hydrosulfide Liquid Tablets?
a. Safety protection: Due to the irritating odor and easy volatilization of sodium hydrosulfide, appropriate protective clothing, gloves, goggles or masks should be worn during operation
At the same time, inhalation of sodium hydrosulfide gas should be avoided as it is highly toxic and may cause poisoning.
b. Operating environment: Sodium hydrosulfide should be operated in a well ventilated environment to reduce the risk of inhaling toxic gases.
c. Avoid contact with oxidants and acids: Sodium hydrosulfide should avoid contact with substances such as oxygen and oxidants during use to prevent fires or explosions. At the same time, sodium hydrosulfide should not be mixed with acid, as it will release toxic gases when exposed to acid.
d. Skin and eye contact: Sodium hydrosulfide solution has an irritating effect on the skin and eyes. When using, protective gloves and goggles should be worn.
e. Storage and transportation: Sodium hydrosulfide should be stored in a sealed, ventilated, and dry warehouse. During transportation, it should be protected from rain and direct sunlight exposure. Iron drums containing sodium hydrosulfide should be transported by box trucks, while liquid sodium hydrosulfide should be transported by tank trucks. The packaging should be kept intact and not placed horizontally or upside down, and should not come into contact with acid.
f.Fire and corrosion prevention: Pay attention to fire and corrosion prevention during transportation. Keep away from food and items that react with hydrogen sulfide during storage and transportation.
g. Emergency response: In case of leakage from the packaging barrel, rinse it with water and weld it tightly. When a fire breaks out, water, sand, and various fire extinguishers can be used to extinguish it.
h. Cooling water temperature: The temperature of the cooling water should be controlled to not exceed 15 ℃.
The above are the steps and main issues to be noted when making sodium hydrosulfide liquid into flakes. Following these precautions can ensure the safety and efficiency of the production process.
