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.

Glass manufacture employing sodium sulfite

Abstract: Process of melting a glass batch in order to reduce the number and size of seeds which are present in the final glass product by adding a minor but effective amount, on the order of 0.015 to 1.8 percent by weight, of sodium sulfite to the glass batch charged to a glass furnace.

Limitations of Cold Sodium Sulfite Titration Methods for Free Formaldehyde in Textiles

Abstract: One of the more important analytical methods for formaldehyde in a finished textile is the cold sodium sulfite analysis for free or unbound formaldehyde. Because this formaldehyde assay can represent the equilibrium formaldehyde in a finish or reagent and therefore that formaldehyde available for consumer exposure, values obtained should be free of bias. Interferences and limitations of cold sodium sulfite analyses for formaldehyde are detailed and techniques to surmount the limitations are presented.

Production of soft water comprises regeneration of an ion exchanger during a regeneration phase by a regenerator solution in a reservoir, and addition of a sodium chloride and sodium sulfite to the solution

Abstract: The reservoir (12) is connected with the ion exchanger (10), which is transferred in regular time intervals with the sodium chloride (1-5 g/l) (18), and introduced a T-piece of a regenerator line (22) in the regenerator solution (14). The chloride containing regenerator solution is electrolyzed in a flow cell (20) between two electrodes (50) under polarity reversed DC voltage. An independent claim is also included for an ion exchanger plant with the ion exchanger.

Continuous production of anthranilic acid

Abstract: 1. A PROCESS FOR THE CONTINUOUS PRODUCTION OF ANTHRANILIC ACID WHICH COMPRISES REACTING A STRATING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL SALTS OF PHTHALAMIC OF STAGES, THE FRIST REACTION AQUEOUS MEDIUM IN A PLURALITY OF STAGES, THE REACTION STAGES FOR CONVERTING THE STARTING COMPOUND INTO THE ALKALI METAL SALT OF PHENYL ISOCYANATE-2-CARBOXYLIC ACID BEING CARRIED OUT UNDER SUBSTANTIALLY ADIABATIC CONDITIONS WHILE SUBSTANTIALLY AVOIDING ANY BACKMIXING, THE RESULTING REACTION MIXTURE BEING IMMEDIATELY WITHDRAWN FROM THE REACTION ZONE OF SAID FIRST STAGES AND THEN SUPPLIED SUBSTNATIALLY WITHOUT BACKMIXING TO THE REACTION ZONE OF AT LEAST ONE SUBSEQUENT STAGE FOR HYDROLYSIS AND DECARBOXYLATION OF SAID PHENYL ISOCYANATE-2-CARBOXYLIC ACID INTO ANTHRANILLIC ACID, A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM BOROHYDRIDE, LITHIUM TRIETHOXY ALUMINUM HYDRIDE, SODIUM SULFIDE, SODIUM HYDROGEN SULFIDE, AMMONIUM SULFIDE, SULFUROUS ACID, SULFUR DIOXIDE, SODIUM DITHIONITE, SODIUM, THIOSULFATE, SODIUM FORMALDEHYDE SULFOXYLATE, THIOUREA DIOXIDE, HYDRAZINE AND ITS SALTS, GLUCOSE SODIUM SULFITE AND SODIUM BISULFATE BEING ADDED TO THE REACTION MIXTURE WITHDRAWN FROM THE REACTION ZONE OF SAID FIRST STAGES AND BEFORE THE REACTION HAS BEEN COMPLETED.