Membranes, azeotropic and catalytic components

Patent metadata

Field	Value
Publication number	US-9731969-B2
Application number	US-201314416166-A
Country	US
Kind code	B2
Filing date	Jul 26, 2013
Priority date	Jul 26, 2012
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

This invention relates generally to new findings to improve a method of thermal energy storage or heat pump, i.e. increase the thermal energy from an external heat source, using a reversible condensation reaction with an inorganic oxoacid compound. It accordingly provides components to be used in said improved process as well as the use thereof in the aforementioned method, including the use in the manufacture of products of the condensation products or in the manufacture of the hydrolysis products.

First claim

The invention claimed is:

1. A method to drive the equilibrium of a reversible condensation reaction of phosphoric acid and water towards higher concentrations of said phosphoric acid and/or the formation of poly phosphoric acids, the method, comprising:
adding one or more catalysts to a reaction solution so as to drive the equilibrium of the reversible condensation reaction, wherein the reaction solution comprises the phosphoric acid and water.

2. The method according to claim 1 wherein said one or more catalysts consist of acidic catalysts.

3. The method according to claim 1 , wherein the one or more catalysts are metallic catalysts or inorganic catalysts or combinations thereof.

4. The method according to claim 3 , wherein said metallic catalysts are Metallic Organic Frameworks.

5. The method of claim 1 wherein said catalysts are sulfuric acids; sulfonic acids; Lewis acids; Phosphazines; organo-phosphazines; phosphazenes; polyphosphazenes; Sulfonated hyperbranched polymers; thiol promoters; Acidic zeolites, metal doped zeolites, basic zeolites; or combinations thereof.

6. The method according to claim 1 wherein said catalysts are Metal oxydes M x O y ; organopolysiloxane polycondensation catalysts, including salts thereof; or combinations thereof.

7. The method according to claim 1 , further comprising removal of water from the reaction solution using an azeotropic mixture wherein the components of said azeotropic mixture have a boiling point between 25 and 150° C. when exposed to reaction pressures between 0 and 10 bar.

8. The method according to claim 7 , wherein said removal of water is realized by a heteroazeotropic mixture wherein the components of said heteroazeotropic mixture have a boiling point between 25 and 150° C. when exposed to reaction pressures between 0 and 10 bar.

9. The method according to claim 7 , wherein the water is further separated from the azeotropic mixture by membrane separation using a hydrophilic membrane.

10. The method according to claim 7 , wherein the water is further separated from the azeotropic mixture by gravimetric separation.

11. The method according to claim 7 , further comprising reheating and revaporising the water removed from the reaction solution before being mixed with the poly phosphoric acids in a hydrolysation reaction to release thermal energy from said poly phosphoric acids.

12. The method according to claim 1 , further comprising controlling corrosion effects, solubility of the phosphoric acid, fouling, and/or deposition of salts in the reversible condensation reaction via addition of process improvement components, wherein the process improvement components comprise inhibitors for corrosion of water; -(poly) phosphoric acid mixtures and/or their salts; anti-scalants for membranes, pretreatment filming for used inner equipment material, anti-foulants, or combinations thereof.

13. A method according to claim 12 wherein said process improvements components are selected from the group consisting of:
a. Materials containing a functional azol group;
b. Heterocyclic aromatic ring compounds;
c. Mercaptans (thiols);
d. Aliphatic or aromatic amines;
e. Boric acids, Borates and borate esters;
f. Sulfonic acids and their salts (sulfonates) and or polymers thereof;
g. Carboxylic acids and poly carboxylic acids;
h. Organic films;
i. Inorganic films;
j. Carbides;
k. Anorganic systems containing phosphonic acid, and nitrite systems;
l. Chelating agents;
m. Other complexes; and
n. Combinations thereof.

14. The method according to claim 3 , wherein said catalysts are added on zeolite as a carrier.

Assignees

• Tech For Renewable Energy Systems (Tfres) Bvba
• Univ Gent
• Caloritum Nv

Inventors

• Ducheyne Wouter
• Stevens Christian

Classifications

• Y02P20/129

  Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines · CPC title

• C09K5/16 Primary

  Materials undergoing chemical reactions when used · CPC title

• C01B25/24

  Condensed phosphoric acids · CPC title

• C01B25/234 Primary

  Purification; Stabilisation; Concentration (purification concomitant with preparation C01B25/22; preparation involving solvent-solvent extraction C01B25/46) · CPC title

• C01B25/18

  Phosphoric acid · CPC title