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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.


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Patent
08 May 2002
TL;DR: In this article, dry bamboo shoots are produced through the processes of soaking dry bamboo shoot with 15-30 wt% water content in hot water solution of sodium sulfite at 60-100 deg.c for 30-90 min.
Abstract: Brind dry bamboo shoots is produced through the processes of soaking dry bamboo shoots with 15-30 wt% water content in hot water solution of sodium sulfite at 60-100 deg.c for 30-90 min; boiling in water solution of sodium sulfite and composite phosphate preparation prepared with metaphosphoric acid, polyphosphoric acid and pyrophosphoric acid at 60-100 deg.c for 4-8 hr and letting stand for one night; boiling in hot water and letting stand for one night; soaking in table salt solution of 15-30 wt% concentration for 20-60 min; squeezing to dewater to 20-40 wt% water content; vacuum packing inside high temperature and high pressure resisting plastic bag, disinfection and detection in a metal detector.

8 citations

Patent
26 Jun 1961

8 citations

Patent
08 Aug 2007
TL;DR: In this paper, the making method of chitosan magnet-microball metal palladium complex catalyst, which comprises the following steps: (1) weighing certain quantity of ferric chloride solution through original reducing method, adding a certain amount of sodium sulfite solution; stirring protected by nitrogen; adding sodium hydroxide to react for 1-2h; adding acetic acid solution, and stirring at high speed to finish reacting.
Abstract: The invention discloses a making method of chitosan magnet-microball metal palladium complex catalyst, which comprises the following steps: (1) weighing certain quantity of ferric chloride solution through original reducing method; adding certain quantity of sodium sulfite solution; stirring protected by nitrogen; adding sodium hydroxide to react for 1-2h; adding acetic acid solution of chitose; stirring at high speed to finish reacting; obtaining black chitosan magnet-microball; (2) weighing quantitative chitosan magnet-microball in the flask; adding metal palladium salt and anhydrous alcohol; stirring; heating; refluxing to react 10h under 90-120 deg.c; washing through anhydrous alcohol; sucking; drying; obtaining the product.

8 citations

Patent
14 Jul 1998
TL;DR: In this paper, the objective composition is obtained by subjection a mixture of spray-dried particles containing an inorganic alkali builder (for example, sodium carbonate or sodium sulfite) and a inorganic builder, and by crushing the consolidated product in the presence of a fine powder (preferably having an average particle size of ≤50μm).
Abstract: PROBLEM TO BE SOLVED: To obtain the subject composition in high productivity, as the starting composition is prevented from sticking to the apparatus in the granulation process by subjecting a mixture of spray-dried particles substantially free from surfactant and a surfactant to consolidation treatment and by crushing the consolidated product in the presence of a fine powder. SOLUTION: The objective composition is obtained by subjection a mixture of (A) spray-dried particles containing (i) an inorganic alkali builder (for example, sodium carbonate or sodium sulfite) and (ii) an inorganic builder (for example, type A zeolite or bentonite and the like) and is substantially free from surfactant and (B) a surfactant (for example, nonionic surfactant, anionic surfactant) to consolidation treatment and by crushing the consolidated product in the presence of a fine powder (preferably having an average particle size of <=50μm). The content of the component (i) is preferably 15-35wt.% and the component (ii) is 15-35wt.% in this composition. Thus, dust-raising properties is reduced, coagulation behaviors are inhibited, the solubilization properties are improved and the whiteness of the detergent particles is expected to increase.

8 citations

Patent
18 Nov 2015
TL;DR: In this article, a method for separating copper from sulphur in copper-sulphur ore flotation rough concentrate is described, in which a humate inhibitor is added to a flotation froth product.
Abstract: The invention provides a copper and sulphur separation method for copper-sulphur ore and relates to a method for separating copper from sulphur in copper-sulphur ore flotation rough concentrate. The copper and sulphur separation method for the copper-sulphur ore is characterized in that the steps of a treating process comprise that (1) ore grinding is conducted on copper-sulphur rough concentrate obtained through flotation; (2) after the ore grinding, a sulfur inhibitor selected from sodium sulfite, sodium metabisulfite, sodium bisulfate and sodium thiosulfate is added to the copper-sulphur rough concentrate, and a sulfur inhibition reaction is conducted; (3) a copper selective collector is added, and flotation is conducted; (4) a humate inhibitor is added to a flotation froth product; after an reaction with mixing is conducted, concentration is conducted; and (5) a humate inhibitor is added to a concentration froth product; after an reaction with mechanical mixing, concentration is conducted again, and copper concentrate separated from the sulphur is obtained. The copper and sulphur separation method for the copper-sulphur ore is simple in technology; lime and other highly alkaline inhibitors are not required to be added; required reagents are extensive in source and easy to prepare and add; the prepared reagents are good in flowability, easy to control, and not liable to block pipelines. The copper and sulphur separation method for the copper-sulphur ore is a novel copper and sulphur separation method.

8 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202240
202122
202073
2019114
2018143