Diamondoid fuels

Patent metadata

Field	Value
Publication number	US-10710941-B1
Application number	US-201816178273-A
Country	US
Kind code	B1
Filing date	Nov 1, 2018
Priority date	Nov 1, 2018
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A diamondoid fuel comprising a cage structure including 10, 14, 18, or 22 carbons. The diamondoid fuel also includes one of one to four cyclopropyl groups bonded to the cage structure or two to four functional groups bonded to the cage structure where the functional groups are an alkyl group, an allyl group, a cyclopropyl group, or combinations thereof. Additionally, at least one functional group is an allyl group and at least one functional group is a cyclopropyl group.

First claim

What is claimed is:

1. A diamondoid fuel, consisting of:
a structure selected from one of i, ii, iii, iv:

and
where R, R′, R″, and R′″ are one of:
i) two hydrogens or two alkyl groups with 1 to 20 carbons, an allyl group, and a cyclopropyl group;
ii) one hydrogen or one alkyl group with 1 to 20 carbons, two allyl groups, and a cyclopropyl group; or
iii) one hydrogen or one alkyl group with 1 to 20 carbons, two cyclopropyl groups, and an allyl group.

2. The diamondoid fuel of claim 1 , wherein the diamondoid fuel is selected from the group consisting of 3,6-diallyl-13-cyclopropyltriamantane, 3,11-diallyl-19-cyclopropyltetramantane, and combinations thereof.

3. A diamondoid fuel, consisting of:
a structure selected from one of:

and
where R, R′, R″, and R′″ are each independently a hydrogen or a cyclopropyl group with at least one of R′, R″, and R′″ being a cyclopropyl group.

4. The diamondoid fuel of claim 3 , wherein the diamondoid fuel is selected from the group consisting of 1,6-dicyclopropyldiamantane, 1,4-dicyclopropyldiamantane, 4,9-dicyclopropyldiamantane, 1,4,9-tricyclopropyldiamantane, 1,4,6-tricyclopropyldiamantane, 1,4,6,9-tetracyclopropyldiamantane, and combinations thereof.

5. A diamondoid fuel, consisting of:
a structure selected from one of i, ii, iii, iv:

and
where R, R′, R″, and R′″ are one of:
i) one allyl group and three cyclopropyl groups;
ii) two allyl groups and two cyclopropyl groups; or
iii) three allyl groups and one cyclopropyl group.

6. The diamondoid fuel of claim 5 , wherein the diamondoid fuel is selected from the group consisting of 3,6,13-triallyl-19-cyclopropyltriamantane, 3,11,19-triallyl-6-cyclopropyltetramantane, and combinations thereof.

Assignees

• Us Navy

Inventors

• Harvey Benjamin G
• Davis Matthew C

Classifications

• C10L10/12

  for improving the cetane number · CPC title

• C10L1/00

  Liquid carbonaceous fuels · CPC title

• C06B43/00

  Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00 · CPC title

• C10L1/04

  essentially based on blends of hydrocarbons · CPC title

• C07C2603/90

  containing more than four rings · CPC title