Topic
Sodium sulfite
About: Sodium sulfite is a research topic. Over the lifetime, 2548 publications have been published within this topic receiving 18523 citations. The topic is also known as: Na2SO3 & Anhydrous sodium sulfite.
Papers published on a yearly basis
Papers
More filters
Patent•
18 Apr 2007
TL;DR: In this article, a new method for producing sodium sulfite and sodium sulfide by using sulfur alkali reduced waste water was proposed, which includes the following steps: using SAL as mother liquor, vacuum evaporation of mother liquor water, vacuum concentrating desalted or saltless mother liquid water, heating concentrating or evaporating the residual solution, and further vacuum evaporating said saturated solution whose residue is removed so as to obtain white anhydrous sodium sulphite.
Abstract: The present invention relates to a new method for producing sodium sulfite and sodium sulfide by using sulfur alkali reduced waste water. Said method includes the following steps: using sulfur alkali reduced waste water as mother liquor, vacuum evaporating mother liquor water, vacuum concentrating desalted or saltless mother liquor water to obtain the mixture of sodium sulfite and sodium sulfide; preparing saturated solution of said mixture; using active carbon to make adsorption and decolouring, press-filtering and removing residue; further vacuum evaporating said saturated solution whose residue is removed so as to obtain white anhydrous sodium sulfite; heating concentrating or evaporating the residual solution so as to obtain sodium sulfide.
4 citations
Patent•
24 Dec 2003
TL;DR: In this article, a simple process for preparing sodium methyallylsulfonate from methacrylic chloride, sodium sulfite and EDTA as assistant is described, which includes dissolving the raw materials, sulfonating reaction, concentrating the resultant, hot filtering, cooling for crystallizing, cyclic washing 3-4 times, recrystallizing, and drying.
Abstract: A process for preparing sodium methyallylsulfonate from methacrylic chloride, sodium sulfite and EDTA as assistant includes dissolving the raw materials, sulfonating reaction, concentrating the resultant, hot filtering, cooling for crystallizing, cyclic washing 3-4 times, recrystallizing, and drying Its advantages are simple process and no environmental pollution
4 citations
Patent•
20 Feb 1990
TL;DR: In this paper, reducing agents, such as sodium thioglycolate, potassium thioglobalate, cysteine-hydrochloate, sodium sulfide, potassium sulfide and ascorbic acid, were charged into the gel base material to stably fix the anaerobic bacteria while holding the same or the reducing agents are charged into a solidifying liquid or washing liquid when the solidification liquid is required for gelatinization or when washing is required.
Abstract: PURPOSE: To stably fix anaerobic bacteria while maintaining activity by removing the dissolved oxygen in a gel base material or lowering an oxidation reduction potential. CONSTITUTION: Reducing agents, such as sodium thioglycolate, potassium thioglycolate, cysteine-hydrochloate, sodium sulfide, potassium sulfide, ascorbic acid, sodium sulfite, and sodium hydrogensilfite are charged into the gel base material to stably fix the anaerobic bacteria while holding the same or the reducing agents are charged into a solidifying liquid or washing liquid when the solidifying liquid is required for gelatinization or when washing is required. The dissolved oxygen is decreased to ≤0.1ppm or the oxidation reduction potential is lowered to ≤0mV by charging of the reducing agents in such a manner. Further, the atmosphere is substd. with nitrogen, helium, argon, carbon dioxide, etc., under the perfect anaerobic condition. The utilization to a methane fermentation treatment, etc., is possible and the industrial value is extremely high. COPYRIGHT: (C)1991,JPO&Japio
4 citations
Patent•
15 Dec 2002
TL;DR: In this article, the authors present a method for preparing nutrient media used for culturing the plague microorganism vaccine strain and can be used in medicinal microbiology, in particular, to prepare nutrient media which is used in particular to prepare the vaccine strain.
Abstract: FIELD: biotechnology, microbiology. ^ SUBSTANCE: invention relates, in particular, to preparing nutrient media used for culturing the plague microorganism vaccine strain and can be used in medicinal microbiology. The nutrient medium for culturing the plague microorganism vaccine strain comprises additionally as a stimulating additive sodium sulfite and as a nutrient base - soybean fruits enzymatic hydrolyzate in the following ratio of components, g/l: microbiological agar, 11.0-13.0; soybean fruits enzymatic hydrolyzate, 250.0-350.0; sodium chloride, 4.5-5.5; sodium hydrogen phosphate, 3.5-4.5; sodium sulfite, 0.0003-0.0005; distilled water, the balance. Invention provides enhancing the growth property of nutrient medium. ^ EFFECT: valuable properties of medium. ^ 3 ex
4 citations
TL;DR: In this paper, the results of investigations into the completeness of the sulfite-thiosulfate dissolution of noble metals depending on the conditions of the autoclave opening (AO) of flotation concentrates under various leaching conditions (the reagent concentration and the influence of various additions) are described.
Abstract: The results of investigations into the completeness of the sulfite-thiosulfate dissolution of noble metals depending on the conditions of the autoclave opening (AO) of flotation concentrates under various leaching conditions (the reagent concentration and the influence of various additions) are described. The necessity of carrying out the AO process with the complete maximum recovery using cyanidation is shown allowing for the factors that increase the content of elemental sulfur in the AO cake.
4 citations