Production and purification of anhydrous sodium sulfide

Abstract. Anhydrous sodium sulfide (Na 2 S) is a key component in sodium-sulfur batteries as well as an important chemical reagent. However, anhydrous Na 2 S is currently prohibitively expensive for applications outside of research labs, and purity is a concern. Herein, we compare the properties of three forms of anhydrous Na 2 S: (i) …

Method for the preparation of anhydrous sodium sulfide

A method of preparing anhydrous sodium sulfide having an Na 2 S content of at least 98 wt %, by drying hydrous sodium sulfide having a water content of …

Method for purifying industrial anhydrous sodium sulfide

6. The method for purifying industrial grade anhydrous sodium sulfide of claim 1, wherein in the step (3), the pulverized particle size is 10 to 15 μm. 7. The method for purifying industrial grade anhydrous sodium sulfide of claim 1, wherein in step (3), the inert gas is one or more of nitrogen, argon, helium. 8.

Production and purification of anhydrous sodium sulfide

Abstract. Anhydrous sodium sulfide (Na 2 S) is a key component in sodium-sulfur batteries as well as an important chemical reagent. However, anhydrous …

CN102001690B

By adopting the process of distilling and concentrating the waste liquor in one step, the invention uses suitable organic small-molecule alcohol to prepare the industrial anhydrous sodium sulfate through the supersaturated precipitation of the sodium sulfate contained in the waste liquor which is from the preparation of the white carbon black ...

Sodium Sulfate

Sodium sulfate is defined as the sodium salt of sulfuric acid. The sodium sulphate chemical formula is Na 2 SO 4.. Anhydrous sulfate can be described as a white crystalline solid, which is also called mineral thenardite, whereas, the decahydrate Na 2 SO 4.10H 2 O has been called either mirabilis or Glauber's salt.. When Na 2 SO 4.7H 2 O is …

Process for the preparation of anhydrous sodium sulfide

United States Patent 6503474 Abstract: A process is disclosed for the preparation of anhydrous sodium sulfide by heating sodium sulfide having a water content of from 38 …

Sodium Sulfate, Anhydrous, Granular, ACS

. 231-820-9 : Na2SO4. 142.04 g/mol : 4. FIRST-AID MEASURES . Eyes Rinse with plenty of water for at least 15 minutes. Inhalation Move casualty to fresh air and keep at rest. If breathing is difficult, give oxygen. If not breathing, give artificial respiration.

Preparation of anhydrous sodium metasilicate

The sodium metasilicate produced by this method inherently contains impurities such as soda ash, sodium sulfate, sodium chloride said impurities being present in an aggregate total of about 4 to 5 percent by weight. The recovery of a substantially pure, anhydrous sodium metasilicate product is still an existing problem Without adequate resolution.

TW521064B

c01d — compounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium C01D5/00 — Sulfates or sulfites of sodium, potassium or alkali metals in general TW087121005A Process for the preparation of anhydrous sodium sulfide TW521064B ( en )

Innovative Process For Treatment Of Sulfuric Acid Waste …

may have to be taken from the crystallizer so that the sodium sulfate product will meet the sodium chloride specification for detergent quality sodium sulfate. Typical specifications required for detergent-grade sodium sulfate are shown in Table 11. The purge from the crystallizer is evaporated in a purge crystallizer. The high sodium chloride

US Patent for Process for the preparation of anhydrous sodium …

1. A process for the preparation of anhydrous sodium sulfide comprising: heating water-containing sodium sulfide having a water content of from 35 to 45% by conveying said sodium sulfide with mixing, through a drier apparatus in which the temperature of the sodium sulfide rises continuously from approximately 20° C. at the …

US Patent Application for PROCESS FOR PRODUCING SODIUM …

The present invention relates to a process for producing sodium sulphate from phosphogypsum, comprising: a step (101) of lixiviation of phosphogypsum by means of a basic solution so as to obtain a sodium sulphate solution (S) containing metal impurities, said basic solution comprising a chelating agent suitable for forming …

Preparation of high bulk density anhydrous sodium …

Abstract. A process for preparing pure anhydrous sodium carbonate crystal from impure purge liquor obtained from calcined trona via the monohydrate process and containing silica, organic material and sulfate impurities, is described comprising the steps of (1) treating the purge liquor with magnesium oxide and by the addition of an effective …

US Patent for Process for the preparation of anhydrous …

The Salt Cake Process involves the reaction of sodium chloride (salt) with sulfuric acid (H2SO4) to produce sodium sulphate. The chemical reaction can be …

Preparation method of anhydrous sodium sulfate

The anhydrous sodium sulfate obtained by the method of the invention has short process flow, high product quality and high product purity up to 99-99.3%, and the sodium sulfate per ton can be co-produced with 1.55 tons of hydrochloric acid (31%) at the same time; and the method has the advantages of low production cost, convenient …

US4058510A

A process for treating a sodium lauryl sulfate-whey protein complex to form an egg white substitute with recovery of the sodium lauryl sulfate which comprises either (a) adjusting the pH and solids content of the solution containing the complex to from about 5.0 to about 6.5 and from about 5% to about 305 by weight, respectively, at a ...

Process for the preparation of anhydrous sodium sulfide

The invention provides a process for the preparation of anhydrous sodium sulfide by heating water-containing sodium sulfide under reduced pressure, characterized in that sodium sulfide having a water content of from 35 to 45%, especially from 38 to 40%, is conveyed, with mixing, through an apparatus in which the temperature of the Na 2 S …

Sodium sulfate CAS | 106649

106649. Supelco. Sodium sulfate. anhydrous for analysis EMSURE® ACS,ISO,Reag. Ph Eur. Sodium sulfate MSDS (material safety data sheet) or SDS, CoA and CoQ, dossiers, brochures and other available documents. CAS #: EC Number: 231-820-9 Molar Mass: 142.04 g/mol Chemical Formula: Na₂SO₄ Hill Formula: Na₂O₄S Grade: …

US Patent Application for SOLID PREPARATION …

The present invention relates to a solid colonic purgative for oral application, containing anhydrous magnesium sulfate, potassium sulfate, anhydrous sodium sulfate, and, additionally, simethicone. The present invention is more satisfactory in the colon cleansing effect even with the doses reduced by up to about 20 percent compared to those of a …

Patents Assigned to Industria Del Alcali, S.A.DE C.V.

Patent number: 5871551 Abstract: A process for the preparation of anhydrous sodium from a thenardite ore containing sodium sulfate comprising the steps of: crushing the …

Sodium Sulfate Mine and Anhydrous Crystal Production Project

Thermal Kinetics has recently completed design and supply of equipment for the production of anhydrous sodium sulfate.. Our involvement included preparation of the processing plant's material and energy balance, design layout of all major equipment from receipt of raw ore, ore dissolving, purification, clarification, crystallization, …

NCATS Inxight Drugs — SODIUM SULFATE ANHYDROUS

Sodium sulfate anhydrous is an electrolyte replenisher and is used in isosmotic solutions so that administration does not disturb normal electrolyte balance and does not lead to absorption or excretion of water and ions. ... Potassium Sulfate and Magnesium Sulfate Oral Solution is indicated for cleansing of the colon as a preparation for ...

US2321218A

US2775508A Method of treating pickle liquors. US2321218A Production of sodium sulphate. US2926069A Alkali metal aluminates. US2046937A Process for the preparation of copper compounds from metallic copper. US2193092A Recovery of vanadium.

About US | Sichuan Chuan Mei Sodium Sulfate Co. Ltd.

About US. SICHUAN CHUAN MEI SODIUM SULFATE CO. LTD. is the most famous and professional manufacturer of Sodium Sulphate Anhydrous in China. Our sodium sulphate anhydrous is produced from mirabilite ores, following a process that preserves the environment, and using our patent technology. The natural origin of our product, as well …

US Patent Application for PROCESS FOR PRODUCING …

a step of evaporation of the permeate so as to form anhydrous sodium sulphate. This process makes it possible to obtain sodium sulphate of high purity (of …

Sodium Sulfate | Na2SO4 | CID 24436

The importance of tissue sulfate concentrations in regulating 3'-phosphoadenosine 5'-phosphosulfate (PAPS) synthesis is not known. Therefore, this study was conducted to determine the influence of increased availability of inorganic sulfate on steady-state PAPS concentrations in various tissues. To increase tissue sulfate concentrations, 2-16 …

Sodium sulfate: Uses, Interactions, Mechanism of Action

Sodium sulfate. Sodium sulfate is an agent used for bowel cleansing prior to colonoscopy or barium enema X-ray examination. Sodium Sulfate Anhydrous is the anhydrous, sodium salt form of sulfuric acid. Sodium sulfate anhydrous disassociates in water to provide sodium ions and sulfate ions.

Sodium Sulfate Crystallization

Sodium Sulfate Crystallization David J . Neville Whiting Equipment Canada Inc. P.O. Box217, We/land, Ontario, CanadaL3B5P4 ABSTRACT The choice between using multiple effect or mechanical vapor recompression evaporation is largely determined by the cost of utilities consumed. When crystallizing anhydrous sodium sulfate from …

Crystallisation of sodium sulfate: supersaturation and

rate). During the rehydration of the anhydrous sodium sulfate phase, thenardite, another previously unre-ported phase was formed prior to the nucleation of the stable phase, mirabilite Na 2SO 4 10H 2O. The addition of organic inhibitors changes both the crystallisation and the rehydration behavior in this system. Keywords Sodium sulfate …

Recovery method of lithium from sodium sulfate

The invention discloses a recovery method of lithium from sodium sulfate decahydrate in a lithium hydroxide preparation process, belonging to the field of a lithium hydroxide preparation method. The method comprises the following steps: directly adding an organic weak acid into sodium sulfate mother solution to be reacted with lithium …

Process for the preparation of anhydrous sodium sulfate

Abstract: A process for the preparation of anhydrous sodium from a thenardite ore containing sodium sulfate comprising the steps of: crushing the …

Circulation of Sodium Sulfate Solution Produced During …

Hydrometallurgical recovery of rare earth elements (REE) from NiMH battery waste can be performed using sulfuric acid leaching followed by selective precipitation as double salt (REENa(SO4)2·H2O) by adding Na2SO4 as a precipitating agent. The formed double salts can then be further converted with NaOH solution to form REE hydroxides. …

CA2086153A1

sodium sulfate anhydrous sodium brine glauber salt saturated solution Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number CA 2086153 Other languages ...

United States Patent Office 3,024,263 Fatested Var. 6, 1962

of anhydrous sodium sulfate and 36 parts of water. Upon cooling below 32.3 C. the 142.05 parts of anhy drous sodium sulfate can combine with 180 parts of water to form 322 parts of sodium sulfate decahydrate. There fore, the 142.05 parts of anhydrous sodium sulfate will have an excess absorbing or combining power amounting to 144 …

Process for preparing sodium sulphate

The invention relates to a process for preparing a pure, crystalline sodium sulphate by working up natural minerals which contain, besides thenardite and/or mirabilite, additionally glauberite, calcium sulphate and water-insoluble naturally occurring materials in the form of magnesium aluminium silicates. A process is proposed which, with as small as possible …

CA2086153A1

PROCESS FOR THE PREPARATION OF ANHYDROUS SODIUM SULFATE FROM A BRINE ABSTRACT Process for the preparation of anhydrous sodium sulfate from a brine containing sodium sulfate, comprising: mining the brine from the underground; crystallizing the brine by cooling it to crystallize a fine dust of sodium sulfate hydrated …

Sodium Sulfate Anhydrous

Sodium Sulfate Anhydrous. Synonyms: Sodium Sulfate Anhydrous. Molecular Weight 142.04. Browse Sodium Sulfate Anhydrous and related products at Merck.

CN100450929C

The object of the present invention is achieved like this: the preparation method of this large grain anhydrous sodium sulfate, its feature comprises: the tensio-active agent that adds 0.01%-10% in the crystallisation process of saturated metabisulfite solution: 1-isobutyl-3,5-dimethylhexylphosphoric acid, Sodium dodecylbenzene sulfonate, dimethyl …