Sodium pyrosulfate

CAS

13870-29-6

Catalog Number

ACM13870296

Category

Main Products

Molecular Weight

222.11

Molecular Formula

Na2O7S2

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Specification

Synonyms

Disodium disulfate

Appearance

White solid

Sodium Pyrosulfate Used for Sulfation of Carboxyl Starch

Butrim S M, et al. Russian Journal of Applied Chemistry, 2010, 83, 134-138.

Chemical modification of potato carboxyl starch was achieved in a sodium pyrosulfate-dimethyl sulfoxide system, and water-soluble highly substituted sulfoesters were successfully prepared. In this method, sodium pyrosulfate has low toxicity and is safe to handle compared to the traditionally used sulfatating agents (chlorosulfonic acid and sulfuric anhydride).
Preparation of carboxy starch sulfo esters
· The primary hydroxy groups of the D-anhydroglucopyranose units (AGU) in potato starch was selectively oxidized to form carboxy groups using a solution of dinitrogen tetroxide in chloroform.
· O-sulfation was then carried out as follows: 3 g of the polysaccharide were placed in a flask with a ground-glass stopper, to which sodium pyrosulfate and DMSO were added. The mixture was stirred and allowed to sit at room temperature for 20 minutes.
· Subsequently, the flask was transferred to a water bath and heated to a temperature range of 40-80°C for a duration of 1.5 to 24 hours, with occasional stirring. Once the required time had elapsed, the flask was rapidly cooled, and the contents were poured into 50 ml of ethanol. The resulting precipitate was washed with an additional 100 ml of ethanol, dissolved in distilled water, and the solution was neutralized with a dilute NaOH solution to achieve a pH of 8.5.
· Finally, the target products were obtained through purification steps such as dialysis, washing, concentration and freeze drying. The final samples obtained were amorphous powders, varying in color from white or pale yellow to brown.

Effect of Sulfur-Containing Sodium Salt Poisoned Catalyst on SO2 Oxidation and NO Reduction

Xiao, Haiping, et al. Catalysts, 2018, 8(11), 541.

A series of sodium salt [sodium sulfate (Na2SO4) and sodium pyrosulfate (Na2S2O7)] poisoning catalysts with different forms and contents were prepared by wet impregnation method, and the effect of sodium salt poisoned catalyst on SO2 oxidation and NO reduction was investigated. The results show that the sodium salt water poisoning catalyst significantly improves the conversion rate of SO2-SO3. Among them, the 3.6% Na2S2O7 poisonous catalyst has the strongest oxidation effect on SO2. The catalyst reached the maximum SO2-SO3 conversion rate of 1.44% at 410 °C.
Preparation of poisoned catalysts based on Na2SO4/Na2S2O7
The poisoned catalysts were fabricated using the wet impregnation method. A specified quantity of sodium sulfate or sodium pyrosulfate was weighed based on the desired mass percentage of sodium (Na) in the active catalyst components. After being dissolved in a solution, the chemicals were combined with the catalysts and subjected to ultrasonic shaking for four hours. Subsequently, the mixture was dried in a blast drying oven at 110 °C for twelve hours. In the final step, the catalysts were calcined in a muffle furnace at 350 °C for five hours and then ground to a mesh size of 40-60, resulting in the x-Na2SO4/Na2S2O7-SCR poisoned catalysts, where x indicates the sodium content in percentage (1.2% or 3.6%).

What is the molecular formula of Sodium pyrosulfate?

The molecular formula of Sodium pyrosulfate is Na2O7S2.

What are the synonyms of Sodium pyrosulfate?

The synonyms of Sodium pyrosulfate are Sodium Disulfate, Disulfuric acid, disodium salt, Natriumpyrosulfat, DTXSID60889631.

What is the molecular weight of Sodium pyrosulfate?

The molecular weight of Sodium pyrosulfate is 222.11 g/mol.

What are the component compounds of Sodium pyrosulfate?

The component compounds of Sodium pyrosulfate are Sodium (CID 5360545) and Disulfuric acid (CID 62682).

When was Sodium pyrosulfate created?

Sodium pyrosulfate was created on October 25, 2006.

When was Sodium pyrosulfate last modified?

Sodium pyrosulfate was last modified on October 21, 2023.