Solution to the problem: Organic vapor induces the dissolution of molecular salts

Solution to the problem: Organic vapor induces the dissolution of molecular salts

Solution to the problem: Organic vapor induces the dissolution of molecular salts

Researchers from the Institute of Industrial Science, University of Tokyo, find that organic vapors can induce the dissolution of molecular salts (ie organic delicacy), similar to water vapor-induced excretion. Credit: Institute of Industrial Science, University of Tokyo

It has long been known that when salt is stored in a humid environment, it absorbs water, dissolves some of the salt and causes it to clump. Now, researchers from Japan have discovered that water vapor is not the only remedy that can do this.

In a study shown in RSC advancesFor example, researchers from the Institute of Industrial Science, University of Tokyo, have revealed that organic vapors can trigger the dissolution of molecular salts in a manner similar to water vapor.

This finding may have applications for decontamination of pollutants indoors. Volatile organic compounds (VOCs) are organic chemicals that are present as vapors at room temperature. The highest concentrations of VOCs are found indoors, and some are harmful to human health and the environment. These compounds can be removed by a number of methods, but to date have been removed by a phenomenon called organic deliquescens has not been studied.

“Delicacy has been used to collect atmospheric water vapor, but as far as we know, organic vapor-induced delicacy has not yet been reported,” said the study’s lead author, Kazuyuki Ishii. “We investigated this phenomenon using several solid molecular salts that respond to organic vapors by undergoing solid to liquid changes.”

Deliquescens is the process by which a solid becomes a liquid as a result of absorbing enough moisture from the air to dissolve in an aqueous solution. This has been reported for a number of chemicals, including calcium chloride (CaCl2), which spontaneously creates aqueous solutions under humid conditions. Simply increasing the ambient humidity can induce secretion (which is observed as a change from solid to liquid) to certain water-soluble chemicals, without heating or adding liquid. CaCl2has been used, for example, as a chemical desiccant (ie a water-absorbent substance used to induce or maintain dryness).






Credit: University of Tokyo

“We used CaCl2 powder in a typical control experiment, where it was clearly changed to a aqueous solution via water vapor-induced excretion, “explains Kyoko Enomoto, senior author.” The changes we observed in molecular salts in the presence of an organic vapor resembled the results of that control experiment under equivalent conditions. “

The researchers observed that the molecular salts changed from solid to liquid when chemicals such as chloroform (CHCl)3(C2) was used as the organic solvent.

“We found that organic excretion is not uncommon – instead, appropriate organic liquid reactions on VOCs can be designed based on the general rule” which dissolves as “, explains Ishii.

There is an urgent need to remove VOCs from indoor environments using organic solvents, especially industrial plants that use large amounts. Based on the effectiveness of CaCl2 as a chemical desiccant to collect water vapor in the atmosphere, the results of this study offer a promising method of developing agents to capture VOCs.


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More information:
Organic secretion: organic vapor-induced dissolution of molecular salts, RSC advances (2022). DOI: 10.1039 / D2RA03390A

Quote: Solves the problem: Organic steam induces the dissolution of molecular salts (2022, June 28) Retrieved June 28, 2022 from https://phys.org/news/2022-06-dissolving-problem-vapor-dissolution-molecular.html

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