Chemical synthesis of hybrid inorganic-organic nanostructured corrosion inhibitive pigments and methods

Patent metadata

Field	Value
Publication number	US-10323185-B2
Application number	US-201514755304-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jul 2, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, includes premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture under pH control in the presence of polymers as surface modifiers. The premixture is then reacted to form a slurry. The slurry is then quenched to separate nanoparticles from the slurry, followed by surface functionalization in organic inhibitors.

First claim

What is claimed is:

1. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier, wherein the first stock solution includes a transition metal ion Zn 2+ citric complex solution (1:1);
reacting the premixture to form a slurry;
quenching the slurry; and
separating nanoparticles from the slurry after the quenching.

2. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier, wherein the first stock solution includes a rare earth metal ion Ce 3+ EDTA complex solution (1:1);
reacting the premixture to form a slurry;
quenching the slurry; and
separating nanoparticles from the slurry after the quenching.

3. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier, wherein the first stock solution includes a rare earth metal ion Pr 3+ tartaric complex solution (1:1);
reacting the premixture to form a slurry;
quenching the slurry; and
separating nanoparticles from the slurry after the quenching.

4. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier, wherein the second stock solution includes a molybdate (MoO 4 2− ), phosphate (PO 4 3− ), or silicate (SiO 3 − ), added with 1-2 w % polymer as surface modifiers;
reacting the premixture to form a slurry;
quenching the slurry; and
separating nanoparticles from the slurry after the quenching.

5. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier;
reacting the premixture to form a slurry;
quenching the slurry;
separating nanoparticles from the slurry after the quenching; and
controlling the pH of the premixture between 8-10 pH.

6. The method as recited in claim 5 , wherein reacting the premixture to form the slurry is performed as a hydrothermal process.

7. The method as recited in claim 5 , wherein quenching the slurry includes cooling with distilled water.

8. The method as recited in claim 5 , wherein said oxoanions include at least one of a transition metal and a nonmetal oxoanion.

9. The method as recited in claim 5 , wherein said cations include at least one of a rare earth and transition metal cations.

10. The method as recited in claim 5 , wherein said polymer includes at least one of a polyacrylic acid (PAA) and a Polyvinyl alcohol (PVA).

11. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier, wherein separating nanoparticles from a slurry is performed with a membrane filter followed by surface functionalization in organic inhibitors;
reacting the premixture to form a slurry;
quenching the slurry;
separating nanoparticles from the slurry after the quenching; and
washing the nanoparticles with distilled water.

12. A method for preparing a hybrid inorganic-organic nanostructured inhibitive pigment, comprising:
premixing a first stock solution containing one or more cations and a second stock solution containing one or more oxoanions to form a premixture in the presence of a polymer as a surface modifier,
reacting the premixture to form a slurry;
quenching the slurry;
separating nanoparticles from the slurry after the quenching; and
dispersing the nanoparticles in organic inhibitors for surface functionalization after washing.

Assignees

• United Technologies Corp

Inventors

• Zhang Weilong

Classifications

• C09K15/20 Primary

  containing nitrogen and oxygen · CPC title

• C09K15/18

  containing an amine or imine moiety · CPC title

• C09K15/06

  containing oxygen · CPC title

• C09C1/00

  Treatment of specific inorganic materials other than fibrous fillers (tenebrescent materials C09K9/00; luminescent materials C09K11/00); Preparation of carbon black · CPC title

• C09C3/10 Primary

  Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)} · CPC title