Sodium sulfide

About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.

Sulfurized olefin process

Abstract: A sulfurized olefin of improved solubility in lubricating oil is made by reacting sulfur monochloride with a monoolefin (e.g. isobutylene) to form an adduct which is reacted with sodium sulfide, sodium hydrosulfide, sulfur and alkyl mercaptan (e.g. tert-butyl mercaptan) in an aqueous alcohol reaction medium.

Effect of sulfides on the electrochemical behavior of aisi 304 stainless steel in neutral buffered solutions

Abstract: This work studied electrochemical behavior in buffered neutral media containing sodium sulfide and mixtures of sodium chloride and sodium sulfide using potentiodynamic techniques complemented with scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDXA) to obtain information on pitting. The presence of sodium sulfide hinders oxide growth and decreases the amount of ferric oxide formed which leads to a complex sulfide/oxide film. The presence of the sulfide/oxide film on the surface reduces the breakdown resistance as a result of chloride ions shifting the breakdown potential toward more negative values.

Method for synthesizing low-color high-purity fiber-grade polyphenylene sulfide resin

Abstract: The invention discloses a method for synthesizing low-color high-purity fiber-grade polyphenylene sulfide resin. According to the invention, sodium sulfide and p-dichlorobenzene are adopted as raw materials; N-methyl pyrrolidone, N,N-dimethyl acetamide, and the like are adopted as solvents; under the existence of a basic salt, through a four-step method comprising pre-polymerization, polymerization, chain extension and end-capping, the high-purity low-color fiber-grade polyphenylene sulfide resin is synthesized. By adjusting process parameters, polyphenylene sulfide average molecular weight and distribution index can be effectively controlled. Also, purification process can be simplified, and metal ion embedding can be reduced. Resin slice color is reduced, resin processing stability is improved, and resin performance is improved.

Hydrogen sulfide odor threshold

Abstract: tration at which the odor of hydrogen sulfide in water can be detected, the following technique was used. Ten wide-mouth glass-stoppered jars of 1 -liter capacity were partly filled with 800 ml of odor-free distilled water, containing sufficient sulfuric acid to lower the pH to about 4. The temperature of the water was about 25 °C. To five of these jars, equal quantities of a dilute sodium sulfide solution of

Electroconducting transparent film of amorphous copper sulfide on polyethylene substrate

Abstract: The reaction between 1,4,8,11-tetraazacyclotetradecanecopper(II) perchlorate and sodium sulfide gave a transparent amorphous CuS film supported on a polyethylene substrate. The surface electrical resistivity of the film was ca. 10 k Ω□ at 300 K and showed a metal-like temperature dependence down to 250 K.