Synthesis of magnesium adamantane salts and magnesium oxide nanocomposites, and systems and methods including the salts or the nanocomposites

Patent metadata

Field	Value
Publication number	US-2017267620-A1
Application number	US-201715453180-A
Country	US
Kind code	A1
Filing date	Mar 8, 2017
Priority date	Mar 17, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

A method for preparing a magnesium adamantane carboxylate salt is provided. The method includes mixing a magnesium salt and a diamondoid compound having at least one carboxylic acid moiety to form a reactant mixture and hydrothermally treating the reactant mixture at a reaction temperature for a reaction time to form the magnesium adamantane carboxylate salt.

First claim

What is claimed is:

1 . A method for preparing a magnesium adamantane carboxylate salt, the method comprising:
mixing a magnesium salt and a diamondoid compound having at least one carboxylic acid moiety to form a reactant mixture; and hydrothermally treating the reactant mixture at a reaction temperature for a reaction time to form the magnesium adamantane carboxylate salt.

2 . The method of claim 1 , wherein the magnesium salt and the diamondoid compound are mixed in amounts that provide a ratio of Mg 2+ to diamondoid compound in the reaction mixture of from 0.5:1 to 1.0:1.

3 . The method of claim 1 , wherein the magnesium salt is Mg(OH) 2 .

4 . The method of claim 1 , wherein the diamondoid compound is 1-adamantane carboxylic acid.

5 . The method of claim 1 , wherein the reaction temperature is from 100° C. to 180° C.

6 . The method of claim 1 , wherein the reaction temperature is from 140° C. to 160° C.

7 . The method of claim 1 , wherein the reaction time is at least 12 hours.

8 . The method of claim 1 , wherein the magnesium adamantane carboxylate salt comprises a layered morphology.

9 . The method of claim 8 , wherein the layered morphology comprises a plurality of layers lacking edge-to-face connections.

10 . The method of claim 8 , wherein the layered morphology comprises a plurality of layers each having aspect ratios greater than 500.

11 . A method for preparing a nanocomposite, the method comprising:
thermally decomposing a magnesium adamantane carboxylate salt to form the nanocomposite; the transition-metal adamantane carboxylate salt prepared by:
mixing a magnesium salt and a diamondoid compound having at least one carboxylic acid moiety to form a reactant mixture; and
hydrothermally treating the reactant mixture at a reaction temperature for a reaction time to form the magnesium adamantane carboxylate salt.

12 . The method of claim 11 , wherein thermally decomposing the magnesium adamantane carboxylate salt comprises heating the magnesium adamantane carboxylate salt in air at a decomposition temperature for a decomposition time.

13 . The method of claim 12 , wherein the decomposition temperature is at least 450° C.

14 . The method of claim 12 , wherein the decomposition time is at least 4 hours.

15 . The method of claim 11 , wherein the nanocomposite comprises magnesium oxide particles dispersed on a carbon support.

16 . The method of claim 11 , wherein the nanocomposite comprises a microporous sheet morphology.

17 . A catalyst system comprising:
(a) a magnesium adamantane carboxylate salt prepared by:
mixing a magnesium salt and a diamondoid compound having at least one carboxylic acid moiety to form a reactant mixture; and
hydrothermally treating the reactant mixture at a reaction temperature for a reaction time to form the magnesium adamantane carboxylate salt;
(b) a nanocomposite prepared by:
thermally decomposing the magnesium adamantine carboxylate of (a) to form the nanocomposite; or
(c) a mixture of (a) and (b).

Assignees

• Saudi Arabian Oil Co
• Univ Durham

Inventors

• Veerabhadrappa Manohara Gudiyor
• Greenwell Hugh Christopher
• Alabedi Gasan Selman
• Hall John Adrian
• Whiting Andrew

Classifications

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title

• C07C2603/74

  Adamantanes · CPC title

• B01J31/0205

  comprising carbonyl groups or oxygen-containing derivatives, e.g. acetals, ketals, cyclic peroxides · CPC title

• B01J37/10

  in the presence of water, e.g. steam · CPC title