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Prevention or suppression of cyrstallisation of boric acid present in an aqueous phase
US2015158810A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2015158810-A1 |
| Application number | US-201314403526-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 27, 2013 |
| Priority date | May 29, 2012 |
| Publication date | Jun 11, 2015 |
| Grant date | — |
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Abstract
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The invention relates to the use of at least one compound comprising at least two hydroxyl functions, the compound being selected from alcohols, aminoalcohols, carboxylic acids and hydroxyacids, for preventing the crystallization of boric acid present in an aqueous phase, or for suppressing this crystallization when this crystallization has already been initiated. Applications: fields in which boric acid may be used and, in particular, those in which it is necessary to rapidly have available aqueous phases containing a high concentration of boric acid which do not include boric acid crystals, for example in the nuclear industry.
First claim
Opening claim text (preview).
1 . A method comprising: using at least one compound comprising at least two hydroxyl functions, the compound being selected from alcohols, aminoalcohols, carboxylic acids, and hydroxyacids, to prevent crystallization of boric acid present in an aqueous phase, or to suppress said crystallization when crystallization has already been initiated. 2 . The method according to claim 1 , wherein the compound comprising at least two hydroxyl functions includes a total number of carbon atoms which is at most equal to eight. 3 . The method according to claim 2 , wherein the compound comprising at least two hydroxyl functions includes from 2 to 6 hydroxyl functions. 4 . The method according to claim 3 , wherein the compound comprising at least two hydroxyl functions is selected from maleic acid, 2,2-dimethylpropane-1,3-diol, 2-amino-2-(hydroxymethyl)-propane-1,3-diol, 2-[bis-(2-hydroxyethyl)-amino]-2-(hydroxymethyl)-propane-1,3-diol, myo-inositol, and pentaerythritol. 5 . The method according to claim 4 , wherein the compound comprising at least two hydroxyl functions is selected from 2-amino-2-(hydroxymethyl)-propane-1,3-diol, 2-[bis-(2-hydroxyethyl)-amino]-2-(hydroxymethyl)-propane-1,3-diol, and pentaerythritol. 6 . The method according to any of the preceding claim 1 , wherein a mass concentration of boric acid in the aqueous phase is at least equal to a value of a mass solubility of boric acid at a temperature which is exhibited by said aqueous phase containing boric acid. 7 . The method according to claim 1 , wherein a molar ratio of the compound comprising at least two hydroxyl functions to the boric acid present in the aqueous phase is from 0.1/1 to 0.7/1. 8 . The method according to claim 1 , wherein the compound comprising at least two hydroxyl functions is added in solid form to the aqueous phase containing boric acid. 9 . The method according to claim 1 , wherein the compound comprising at least two hydroxyl functions is added in liquid form to the aqueous phase containing boric acid.
Assignees
Inventors
Classifications
- C01B35/1054Primary
Orthoboric acid · CPC title
1,3-Propanediol; 1,2-Propanediol · CPC title
Malonic acid · CPC title
- C07C215/10Primary
with one amino group and at least two hydroxy groups bound to the carbon skeleton · CPC title
Inositols · CPC title
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Frequently asked questions
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- What does patent US2015158810A1 cover?
- The invention relates to the use of at least one compound comprising at least two hydroxyl functions, the compound being selected from alcohols, aminoalcohols, carboxylic acids and hydroxyacids, for preventing the crystallization of boric acid present in an aqueous phase, or for suppressing this crystallization when this crystallization has already been initiated. Applications: fields in …
- Who is the assignee on this patent?
- Commissariat L Energie Atomique Et Aux Energies Alternatives
- What technology area does this patent fall under?
- Primary CPC classification C01B35/1054. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jun 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).