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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
10 Aug 2016
TL;DR: In this paper, a household water pipeline cleaning agent is described and a preparation method for its use in a household drinking water pipeline is described. But the preparation method is simple and easy and convenient to implement.
Abstract: The invention discloses a household water pipeline cleaning agent and a preparation method thereof The household water pipeline cleaning agent comprises a saponin extracting solution, lauryl sodium sulfate, p-aminobenzoic acid, ammonia water, sodium bicarbonate, potassium bitartrate, polyepoxysuccinic acid, sodium sulfite, phosphonic carboxylic acid, a polycarboxylic acid water reducing agent, a phosphoryl carboxylic acid polymer, a Belsperse164 dispersing agent, dimethylcarbinol, amidogen ether betaine, urotropine, stannous octoate, a surfactant, D solvent oil, aluminum naphthenate, sodium chloride, lipase, tetradecyldimethylbenzylammonium chloride, triethanolamine oleate soap, ferric citrate, polyether and water The raw materials of the household water pipeline cleaning agent have the advantages of environment friendliness, no toxicity, wide sources and low price, and can be stored for a long time The preparation method is simple, and is easy and convenient to implement The household water pipeline cleaning agent can not leave beneficial conditions to microbial deposition after cleaning, thoroughly removes biological slime, reproductive fungi and bacteria caused by poor quality of water provided by the heating company, and can implement thorough cleaning

4 citations

Journal ArticleDOI
Yang Ping1, Kai Liu1, Peiqi Lyu1, Lihuan Mo1, Jun Li1 
TL;DR: In this article, the response surface methodology was employed to determine the optimum level of sodium sulfite dosage, sodium hydroxide dosage, maximum cooking temperature, and cooking time at the sulfonation stage, and their influences on paper sheets properties were analyzed.
Abstract: In order to optimize the sulfonated chemi-mechanical pulping of palm oil empty fruit bunch, the response surface methodology was employed. It was intended to determine the optimum level of sodium sulfite dosage, sodium hydroxide dosage, maximum cooking temperature, and cooking time at the sulfonation stage, and their influences on paper sheets properties were analyzed. An optimum compromise was obtained, and the sodium sulfite dosage, sodium hydroxide dosage, maximum temperature, and cooking time were 18%, 4%, 155 °C, and 100 min, respectively. The density, bursting strength index, tensile strength index, and tearing strength index were 0.5622 g/cm3, 2.60 kPa·m2/g, 45.01 N·m/g, and 7.53 mN·m2/g, respectively.

4 citations

Patent
28 Sep 2016
TL;DR: In this paper, a silicon quantum dot aqueous phase preparation method is described, where a reduction agent and a coupling agent are obtained and dissolved in water under inertia gas protection, wherein the molar ratio of the coupling agent to the reduction agent is 1: 0.2-10.
Abstract: The invention discloses a silicon quantum dot aqueous phase preparation method. The method includes the following steps that firstly, a reduction agent and a silane coupling agent are obtained and dissolved in water under inertia gas protection, wherein the molar ratio of the silane coupling agent to the reduction agent is 1:(0.2-10); secondly, the mixed solution obtained in the first step is conveyed into a high-pressure reaction kettle to be heated to 140-220 DEG C, and a silicon quantum dot solution can be obtained after reaction; or the mixed solution obtained in the first step is conveyed into a microwave reaction kettle to be heated to 140-220 DEG C, and a silicon quantum dot solution can be obtained after reaction; thirdly, the silicon quantum dot solution obtained in the second step is mixed with an organic solvent, centrifugation is conducted, supernate is removed, drying is conducted, and solid silicon quantum dots are obtained, wherein the reaction agent is a mixture composed of two or more of citric acid, sodium sulfite, sodium borohydride, sodium citrate, ascorbic acid, urea, thiourea, hydrazine hydrate, L-cysteine, bovine serum albumin or modified ovine serum albumin.

4 citations

Journal ArticleDOI
TL;DR: In this paper, a combination of one of the three active alkali levels (14, 16, and 18%; Na2O, and oven-dry weight of OCC); one of two pulping temperatures (145 and 175oC); and one of three pulping times (60 and 120 minutes) and sodium sulfite to sodium hydroxide ratio of 30/70 (mol/mol) were examined.
Abstract: The paper industry has taken various steps to address environmental concerns and raw material limitations. Among them, paper recycling has been shown to be a viable option. In this study, the alkaline sulfite pulping of old corrugated containers (OCC) to produce bleachable pulp was investigated. A combination of one of the three active alkali levels (14, 16, and 18%; Na2O, and oven-dry weight of OCC); one of two pulping temperatures (145 and 175oC), and one of two pulping times (60 and 120 minutes) and sodium sulfite to sodium hydroxide ratio of 30/70 (mol/mol) were examined. After preliminary pulping and evaluation, pulp with a kappa number of 18.3 and brightness of 50.2%, which was produced applying 18% active alkali, sodium sulfite to sodium hydroxide ratio of 30:70, and pulping time and temperature of 120 minutes and 175oC, respectively, having the yield of 64.0% (based on oven dry weight of washed OCC) and 72.7% (based on original weight of the OCC as received), respectively, was selected for totally chlorine free (TCF) bleaching trials. Brightness, opacity, tensile, and tear strength indices of this pulp were measured as 50.2%, 81.4%, 27.7 N.m/g, and 12.35 mN.m2/g, respectively. Bleaching of this pulp applying 3% H2O2 and 2.25% NaOH at 90 minutes generated bleached pulp with brightness and opacity as 57.1% and 78.2%, respectively. The bleaching yield was measured as 92%. Tensile and tear strength indices of this pulp were measured as 25.1 Nm/g and 12.4 mN.m2/g, respectively.

4 citations

01 Jan 2013
TL;DR: In this article, the authors reviewed the development of energy efficient technology for SO 2 removal from flue gases of combustion systems by using the method of Wellman-Lord, characterized by absorption of sulfur dioxide with sodium sulfite solution, which reacts to form sodium bisulfite.
Abstract: Investigations are reviewed on development of energy efficient technology for SO 2 removal from flue gases of combustion systems by using the method of Wellman-Lord. This method is characterized by absorption of sulfur dioxide with sodium sulfite solution, which reacts to form sodium bisulfite. The absorber is typically a packed column with multiple stages. After evaporation of the solution, SO 2 and sodium sulfite are obtained. The latter is dissolved in water from condensation of the steam carrying SO 2 from the evaporator. The regenerated solution returns in the absorber. The SO 2 removed from the flue gases is obtained as a pure product for use in chemical, food or wine production. Technical and economical as sessment of this regenerative method is presented in comparison to the non-regenerative gypsum method, using data from the existing research papers and own experience from investigations on improvement of the Wellman-Lord method and development of innovative gypsum technology.

4 citations


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