Compositions and methods for cementing a wellbore using microbes or enzymes
US-2017029689-A1 · Feb 2, 2017 · US
Method for enzymatic repair of cementitious surfaces
US10647617B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10647617-B2 |
| Application number | US-201815903565-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 23, 2018 |
| Priority date | Feb 24, 2017 |
| Publication date | May 12, 2020 |
| Grant date | May 12, 2020 |
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- Title
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Abstract
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An aqueous solution of carbonic anhydrase and calcium chloride is contacted with a cementitious surface defining at least one opening or fissure in the presence of ambient carbon dioxide to thereby cause the calcium chloride and carbon dioxide to react, whereby calcium carbonate precipitate from the solution and seals the opening or fissure.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of sealing a cementitious surface comprising the step of physically contacting at least one opening or fissure of a cementitious surface with an aqueous solution of carbonic anhydrase and calcium chloride, the aqueous solution is exposed to an ambient atmosphere that includes carbon dioxide, whereby calcium carbonate is formed by a chemical catalyzation process performed by the carbonic anhydrase using ambient carbon dioxide, and precipitates to thereby seal the opening or fissure. 2. The method of claim 1 , wherein the pH of the aqueous solution is in a range of between about 3.0 and about 9.5. 3. The method of claim 2 , wherein the pH is in a range of between about 6.5 and about 9.5. 4. The method of claim 1 , wherein the molar concentration of carbonic anhydrase of the aqueous solution is in a range of between 0.5 μM and about 1 mM. 5. The method of claim 4 , wherein the molar concentration of carbonic anhydrase of the aqueous solution is in a range of between about 1 μm and about 10 μM. 6. The method of claim 4 , wherein the molar concentration of calcium chloride is in a range of between about 0.5 M and about 5 M. 7. The method of claim 6 , wherein the molar concentration of calcium chloride is in a range of between about 1.5M and about 2.5M. 8. The method of claim 6 , wherein the temperature of the aqueous solution is between about 5° C. and about 95° C. 9. The method of claim 8 , wherein the temperature of the aqueous solution is between about 20° C. and about 40° C. 10. The method of claim 1 , wherein the aqueous solution has a carbonic anhydrase concentration of about I μM, a calcium chloride concentration of about 2M, a temperature of about 20° C., and a pH of about 8.0.
Assignees
Inventors
Classifications
containing carbon in the anion, e.g. carbonates · CPC title
Carbonate dehydratase (4.2.1.1), i.e. carbonic anhydrase · CPC title
Lyases (4.) · CPC title
with inorganic materials · CPC title
- C04B41/5012Primary
chlorides · CPC title
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- What does patent US10647617B2 cover?
- An aqueous solution of carbonic anhydrase and calcium chloride is contacted with a cementitious surface defining at least one opening or fissure in the presence of ambient carbon dioxide to thereby cause the calcium chloride and carbon dioxide to react, whereby calcium carbonate precipitate from the solution and seals the opening or fissure.
- Who is the assignee on this patent?
- Worcester Polytech Inst
- What technology area does this patent fall under?
- Primary CPC classification C04B41/5012. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 12 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).