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Showing papers on "Sodium sulfite published in 1985"


Journal ArticleDOI
TL;DR: In this article, several liquid phase absorbents have been suggested for the NO removal, particularly for the purpose of pollution abatement, including water, nitric and sulfuric acids, sodium hydroxide, sodium sulfite and sodium chlorite.
Abstract: Oxidation of nitric oxide is an important step in NOx absorption. Recent advances namely catalytic oxidation and the use of slrong oxidizing agents have been reviewed. The refinements which have been made in the kinetics of NO oxidation have been discussed. Several liquid phase absorbents have been suggested for the NO removal, particularly for the purpose of pollution abatement. Different models for NO oxidation using nitric acid have been analysed and the limitations of published information have been brought out. Absorption of tetravalent nitrogen oxide (NO2 and N2O4) has received considerable attention. The absorbents include water, nitric and sulfuric acids, sodium hydroxide, sodium sulfite and sodium chlorite. Absorption in water and nitric acid is important in the manufacture of nitric acid. The published information on the mechanism of NO2 and N2O4 absorption in water has been critically analysed. The problem of nitrous acid decomposition has been analysed on the basis of film theory. The predicti...

103 citations


Journal ArticleDOI
TL;DR: Eight hays were used in three experiments to evaluate effects on neutral detergent fiber of eliminating sodium sulfite and decalin from the refluxing reagent, replacing sintered glass crucibles during filtration with Gooch crucibles containing glass wool mats, and eliminating final acetone washes of residues.

58 citations


Journal ArticleDOI
TL;DR: Ternary diffusion coefficients can be determined from restricted-diffusion experiments by evaluating zeroth and first time moments of the difference in a concentration-dependent property measured a....
Abstract: Ternary diffusion coefficients can be determined from restricted-diffusion experiments by evaluating zeroth and first time moments of the difference in a concentration-dependent property measured a...

22 citations


Journal ArticleDOI
TL;DR: Evidence is presented that the effect of sodium sulfite also could be one of inhibiting the formation of Maillard products, which are detected as lignin, during the reflux step of the NDF method.
Abstract: This research addresses two problems of fecal fiber analysis: the nitrogen in fecal neutral detergent fiber (NDF); and the impact of sodium sulfite on NDF yield and composition. Fecal samples for analysis were collected from healthy adults during a study of the effect of a wheat bran supplement on bowel function. When sodium sulfite, originally a component of neutral detergent solution, was omitted, the yield of fecal NDF, the concentration of apparent lignin in the NDF and the amount of nitrogen recovered in both the NDF residue and the lignin increased. These data support a previous report by Van Soest that the sulfite attacks lignin. We present evidence that the effect of sodium sulfite also could be one of inhibiting the formation of Maillard products, which are detected as lignin, during the reflux step of the NDF method. Three different fractions of nitrogen were identified in fecal NDF: the fraction eliminated by sodium sulfite; a fraction removed by dilute acid; and the fraction that remained in Klason lignin. Apparent NDF digestibilities were calculated several ways by using correction factors to account for this nitrogen. Only the subtraction of Klason lignin from fecal NDF eliminated the one negative digestibility we observed.

21 citations


Journal ArticleDOI
TL;DR: In this article, the kinetics of cathodic reduction of glucose were studied by a rotating disk electrode at rotation speeds from 500 to 6000 rpm and zero to 2.0 M concentration of glucose.

12 citations


Patent
14 Nov 1985
TL;DR: In this paper, a formaldehyde absorbent having strong absorbing capacity of formaldehyde released from woodwork and exerting no adverse effect on a human body or the woodwork after use, by using an aqueous solution containing sodium sulfite and ammonium salt.
Abstract: PURPOSE: To obtain a formaldehyde absorbent having strong absorbing capacity of formaldehyde released from woodwork and exerting no adverse effect on a human body or the woodwork after use, by using an aqueous solution containing sodium sulfite and ammonium salt. CONSTITUTION: Sodium sulfite and ammonium salt such as ammonium chloride or ammonium phosphate are dissolved in water to obtain an aqueous formaline absorbent solution. This aqueous solution is applied to the front and back surfaces of a woodwork such as plywood prepared using a formalin type resin. Formaldehyde released from the woodwork is rapidly reacted with the absorbent and caustic soda generated during reaction is rapidly reacted with acid generated from the ammonium salt to be formed into a neutral salt. COPYRIGHT: (C)1987,JPO&Japio

6 citations


Patent
11 Sep 1985
TL;DR: In this article, a process for producing an alkanesulfonic acid is described, which comprises causing sulfur dioxide and oxygen to act on a saturated hydrocarbon under illumination with light in a substantially water-free reaction system, wherein photo-sulfoxidation of the saturated polycarbon is performed as a reaction mixture in the reaction system is held in contact with sodium sulfite.
Abstract: A process for producing an alkanesulfonic acid is described, which comprises causing sulfur dioxide and oxygen to act on a saturated hydrocarbon under illumination with light in a substantially water-free reaction system, wherein photo-sulfoxidation of the saturated hydrocarbon is performed as a reaction mixture in the reaction system is held in contact with sodium sulfite

5 citations


Patent
04 Apr 1985
TL;DR: In this article, an acrylamide polymer is made to react with a hypohalous acid salt in an aqueous solution in the presence of an alkali, and mixed with a reducing agent (e.g., sodium sulfite, etc.).
Abstract: PURPOSE:To produce the titled polymer useful as a polymer flocculant, etc. in a remarkably improved yield, by reacting an acylamide polymer with a hypohalous acid salt in an aqueous solution in the presence of an alkali, treating with a reducing agent, aging under specific condition, and controlling the pH of the liquid. CONSTITUTION:An acrylamide polymer is made to react with a hypohalous acid salt in an aqueous solution in the presence of an alkali, and mixed with a reducing agent (e.g. sodium sulfite, etc.). The obtained mixture is aged at 30- 80 deg.C for >=30min and adjusted to <=5pH. The produced polymer can be precipitated as a concentrated hydrous polymer by this process, and the objective polymer decomposed partly by Hofmann degradation can be separated from the product. When the concentration of the aqueous solution of the polymer is too high, the viscosity increases to make stirring difficult, and accordingly, the concentration is preferably 1-15wt%.

5 citations


Patent
29 Apr 1985
TL;DR: A compound expressed by the formula (R 1 is 3W30C secondary or tertiary alkyl or 3W12C cycloalkyl; X is H or halogen; A is protonic acid; n is 0 or a positive number) is an intermediate for photographic couplers as mentioned in this paper.
Abstract: NEW MATERIAL:A compound expressed by the formula (R 1 is 3W30C secondary or tertiary alkyl or 3W12C cycloalkyl; X is H or halogen; A is protonic acid; n is 0 or a positive number). EXAMPLE: 3-tert-Butyl-4-chloro-5-hydrazino-1H-pyrazole hydrochloride. USE: An intermediate for photographic couplers. PREPARATION: The corresponding 5-amino-H-pyrazole based compound is diazotized with a diazotizing agent, e.g. sodium nitrite, and the resultant diazo compound is then reduced with sodium sulfite, etc., to afford the aimed compound expressed by the formula. COPYRIGHT: (C)1986,JPO&Japio

5 citations


Journal ArticleDOI
TL;DR: A novel cleavage reaction of the ansa-ring occurred to give compounds 7a-g, when 4a was allowed to react with aliphatic primary amines having at least one hydrogen atom at the α-position.
Abstract: Rifamycin S (1) was allowed to react with Na2SO3 under mild alkaline conditions to afford sodium rifamycin SV-3-sulfonate (3). Oxidation of 3 with MnO2 gave sodium rifamycin S-3-sulfonate (4a). The reaction of 4a with aromatic amines and aliphatic secondary amines led to 3-aminorifamycin derivatives 5a-g. A novel cleavage reaction of the ansa-ring occurred to give compounds 7a-g, when 4a was allowed to react with aliphatic primary amines having at least one hydrogen atom at the α-position.

4 citations


Patent
07 Mar 1985
TL;DR: In this article, a titled fruit juice drink having excellent appearance was prepared by adding an aqueous solution of a sugar and acid and a specific food additive to the crushed juice of kiwi fruit, and removing the produced granular precipitate from the mixture.
Abstract: PURPOSE:To prepare the titled fruit juice drink having excellent appearance, by adding an aqueous solution of a sugar and acid and a specific food additive to the crushed juice of kiwi fruit, and removing the produced granular precipitate from the mixture. CONSTITUTION:Crushed juice of kiwi fruit is added with (A) an aqueous solution containing a sugar such as honey, glucose, etc. and an acid such as citric acid, ascorbic acid, etc., and (B) less than the allowed limit of a food additive evolving sulfur oxide, e.g. potassium metabisulfite, sodium sulfite, etc. The juice is heated at 70-90 deg.C for 5-10min to cause the discoloration of the solution including the crushed scum from pale green to pale yellowish green, and the mixture is filtered to remove the granular precipitate therefrom.

Journal ArticleDOI
TL;DR: Sodium sulfite dechlorination should not interfere with metal bioassays, and this reaction, and other possible reactions with organic matter, always reduced measureabie sulfite levels to less than 1 μg/L (limit of detection), a level much lower than those tested.
Abstract: Chlorine can be removed from laboratory water supplies by reduction with sodium sulfite, but sulfite complexation of metals may bias aquatic toxicity tests. We tested the effect of waterborne sulfite on the accumulation of waterborne lead by rainbow trout (Salmo gairdneri). After 96 h, the blood lead levels of trout exposed to both 100 μg lead/L and 440 μg sodium sulfite/L were lower than those exposed to lead alone. The highest level of sodium sulfite having no effect on blood lead was 20 μg/L. The addition of 200–300 μg sodium sulfite/L to our water supply after charcoal filtration removed residual chlorine levels rapidly and completely. This reaction, and other possible reactions with organic matter, always reduced measureabie sulfite levels to less than 1 μg/L (limit of detection), a level much lower than those tested. Hence, sulfite dechlorination should not interfere with metal bioassays.

Journal ArticleDOI
01 Jan 1985-Talanta
TL;DR: Sodium sulphite has been used for a very sensitive characterization of m-dinitroaromatics and their derivatives, with dimethylsulphoxide as solvent.

Patent
20 Jul 1985
TL;DR: In this article, a crude naphthalene derivative is dissolved in an organic solvent, treated with an inorganic synthetic adsorbent, rinsed with an aqueous alkali, neutralized by washing with water, further treated with activated carbon to obtain the titled compound.
Abstract: PURPOSE:Crude naphthalene derivative is dissolved in an organic solvent, treated with an inorganic synthetic adsorbent, rinsed with an aqueous alkali, neutralized by washing with water, further treated with activated carbon to obtain the titled compound of high purity and extremely reduced discoloration. CONSTITUTION:Crude naphthalene derivative of the formula [R is -CH2CH2-, -CH(CH3)CH2-, -CH2CH(OH)CH2-; R' is H, CH3; X is H, Cl, Br, CH3, CH3O, C6H5; n is 1-3] is dissolved in an organic solvent which is substantially insoluble in water such as cyclohexane and the solution is treated with an inorganic synthetic adsorbent such as silica-magnesia, when necessary, rinsed with an aqueous solution of an inorganic reducing agent such as sodium sulfite, further with an aqueous alkali, neutralized by washing with water, when needed, dried by dehydration, treated with activated carbon to effect the decoloration and purification of the titled compound. USE:Plastic lenses, optical fibers and photoresists.

Patent
17 May 1985
TL;DR: In this article, the authors proposed to obtain the titled composition having suppressed tendency of browning and quality change caused by Maillard reaction and remarkably improved preservability and useful for food, feed, etc., by adding a small amount of a discoloration-suppressor such as magnesium sulfate, etc, to a composite agent composed of an amino acid and a sugar.
Abstract: PURPOSE: To obtain the titled composition having suppressed tendency of browning and quality change caused by Maillard reaction and remarkably improved preservability and useful for food, feed, etc., by adding a small amount of a discoloration-suppressor such as magnesium sulfate, etc., to a composite agent composed of an amino acid and a sugar. CONSTITUTION: The objective composition can be produced by compounding (A) a composite agent containing an amino acid (e.g. glycine) and a sugar (e.g. glucose) or amino acid, sugar and sodium citrate as a buffering agent with (B) 0.1W15%, preferably 0.5W3% (based on the weight of the component A) at least one kind of discoloration-suppressor selected from magnesium sulfate, magnesium chloride, potassium metabisulfite, sodium sulfite, sodium sulfate and sodium polyphosphate. COPYRIGHT: (C)1986,JPO&Japio

Patent
13 Sep 1985
TL;DR: In this article, the free formaldehyde is removed from a urea resin particle dispersion by adding sulfurous acid (salt) to the dispersion at a specified molar ratio to the free aldehyde contained therein, reacting them and adjusting the final pH to around a neutral value.
Abstract: PURPOSE:To remove free formaldehyde easily from a urea resin particle dispersion, by adding sulfurous acid (salt) to the dispersion at a specified molar ratio to the free formaldehyde contained therein, reacting them and adjusting the final pH to around a neutral value. CONSTITUTION:Formaldehyde is condensed with urea to form a urea resin particle dispersion containing free formaldehyde. To this dispersion, sulfurous acid (salt) (e.g., sodium sulfite or acid sodium sulfite) in an amount of 0.5-1.5mol per mol of the free aldehyde is added, and the reaction between them is effected. The final pH of this dispersion is adjusted to 5-9 in order to prevent the bisulfite compound as the reaction product from forming free formaldehyde by decomposition during storage. In this way, a urea resin particle dispersion containing no free formaldehyde can be obtained.

Patent
04 May 1985
TL;DR: In this paper, a bleaching powder removing agent having good capacity was obtained by adding a specific amount of powdery or crystalline bleaching removing chemicals containing sodium sulfite and sodium thiosulfate and water to pluran to form a flowable or semi-solid composition.
Abstract: PURPOSE:To obtain a bleaching powder removing agent having good capacity, by adding a specific amount of powdery or crystalline bleaching powder removing chemicals containing sodium sulfite and sodium thiosulfate and water to pluran to form a flowable or semi-solid composition. CONSTITUTION:70-500pts.wt. of powdery or crystalline bleaching powder removing chemicals containing sodium sulfite, sodium thiosulfate and calcium sulfite and 50-200pts.wt. of water are added to 100pts.wt. of pluran which are natural polysaccharides having a linear structure wherein mannit triose is repeated in alpha-1,6 bond to prepare a bleaching powder removing jelly in a flowable or semi-solid form. In this bleaching powder removing jelly, bleaching powder removing chemicals 1 are mixed and dispersed throughout an aqueous pluran solution 2 as a crystalline or amorphous particle or powder. Therefore, it is stable to an acid and alkali with the elapse of time.

Patent
Masahiko Ishida1, Ryoichi Haga1, Yoji Odawara1, Sankichi Takahashi1, Katsuya Ebara1 
01 Mar 1985
TL;DR: In this article, a process for easily recovering nearly white starch and protein having a high commercial value by depressing darkening of crushed slurry and juice in producing starch and proteins of a subterranean stem is described.
Abstract: 57 This invention provides a process for easily recovering nearly white starch and protein having a high commercial value by depressing darkening of crushed slurry and juice in producing starch and protein of a subterranean stem. The above-mentioned process is characterized by adding at least one member selected from the group consisting of sodium thiosulfate, potassium thiosulfate, sodium hydrogen sulfite, sodium sulfite and potassium sulfite at the time of crushing the subterranean stem.

Patent
02 Jul 1985
TL;DR: In this paper, anode slime is deposited on the surface of an insoluble anode when tellurium is obtd. by electrowinning of electrolytic liquid of sodium tellurite.
Abstract: PURPOSE: To recover TeO 2 with high efficiency by adjusting the pH of extracted liquid obtd. by treating anode slime with mineral acid to adjust the pH to a specified value, and adding a specified amt. of sodium sulfite to form precipitate. CONSTITUTION: Anode slime is deposited on the surface of an insoluble anode when tellurium is obtd. by electrowinning of electrolytic liquid of sodium tellurite. The anode slime is treated with mineral acid (e.g. H 2 SO 4 ) and the solid is separated from the liquid to prepare extracted liquid, and alkali (e.g. NaOH) is added to the extracted liquid to adjust the pH to 4W8. The extracted liquid is stirred while maintaining the pH, and 0.7W1.5 times weight (basing on the amt. of tellurium contained in the extracted liwuid) of sodium sulfite is added and the mixture is stirred for ca.2W3hr. The temp. at this stage is held at below ca.30°C. The liquid is then allowed to stand or filtered and generated precipitate is separated. Thus, TeO 2 having high purity is recovered at high yield. COPYRIGHT: (C)1987,JPO&Japio

Patent
28 Oct 1985
TL;DR: In this paper, the objective compound is separated from the reaction liquid of chloroethylamine hydrochloride with sodium sulfite, by cooling the produced reaction liquid at a specific temperature, thereby crystallizing the objective compounds.
Abstract: PURPOSE:To separate the objective compound effectively from the reaction liquid of chloroethylamine hydrochloride with sodium sulfite, by cooling the produced reaction liquid at a specific temperature, thereby crystallizing the objective compound CONSTITUTION:Aminoethanesulfonic acid useful as a raw material of pharmaceuticals or dyes is produced by the reaction of chloroethylamine hydrochloride with sodium sulfite In the above process, the produced reaction liquid containing the objective compound and by-produced sodium chloride and sodium sulfate produced by the oxidation of said compound or existing in the sodium sulfite used as a raw material, is cooled at 13-35 degC, preferably 15-20 degC to effect the selective crystallization of the objective compound The objective compound having high purity can be produced economically on an industrial scale, effectively suppressing the contamination with said inorganic salts

Patent
29 Jul 1985
TL;DR: In this article, an optically active cysteine is produced by hydrolyzing a thiazolidine-4-carboxylic acid in the presence of a carbonyl reagent or a metal bisulfite.
Abstract: PURPOSE:To produce the titled compound useful as a raw material of pharmaceuticals, etc., easily, in high yield, without causing racemization, by hydrolyzing an optically active thiazolidine-4-carboxylic acid in the presence of a carbonyl reagent or a metal bisulfite. CONSTITUTION:An optically active cysteine is produced by hydrolyzing an optically active thiazolidine-4-carboxylic acid in the presence of a carbonyl reagent or a metal bisulfite. The hydrolysis is carried out in an aqueous solution, preferably in an aqueous solution of a mineral acid such as sulfuric acid, hydrochloric acid, etc. in the presence of a compound (e.g. sodium sulfite) to capture formaldehyde generated by the hydrolysis. The amount of the formaldehyde acceptor is >=1mol, preferably about 1.3-10mol per 1mol of the optically active compound.