Azeotropic composition containing 1,1,1,3,3,3-hexafluoro-2-methoxypropane

Patent metadata

Field	Value
Publication number	US-11530376-B2
Application number	US-202017099289-A
Country	US
Kind code	B2
Filing date	Nov 16, 2020
Priority date	Jul 17, 2018
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

An azeotropic composition a formulated with 1,1,1,3,3,3,-hexafluoro-2-methoxypropane and a second component selected from the group consisting of isopropyl alcohol, ethanol, methanol, and trans-1,2-dichloroethylene. The azeotropic composition exhibits a substantially constant boiling point at a constant pressure and is useful for various cleaning and degreasing applications.

First claim

What is claimed is:

1. An azeotropic composition comprising:
about 52 weight % (wt. %) to about 99 wt. % 1,1,1,3,3,3,-hexafluoro-2-methoxypropane (“HFMOP”); and
about 1 wt. % to about 48 wt. % of a second component selected from the group consisting of isopropyl alcohol (“IPA”), ethanol, and methanol;
wherein the azeotropic composition has a substantially constant boiling point at a constant pressure.

2. The azeotropic composition of claim 1 , wherein the azeotropic composition contains about 94 wt. % to about 99 wt. % HFMOP and about 1 wt. % to about 6 wt. % of IPA.

3. The azeotropic composition of claim 2 , wherein the azeotropic composition consists essentially of about 97 wt. % of HFMOP and about 3 wt. % of IPA, wherein the azeotropic composition has a substantially constant boiling point of about 49° C. at atmospheric pressure.

4. The azeotropic composition of claim 1 , wherein the azeotropic composition contains about 94 wt. % to about 99 wt % HFMOP and about 1 wt. % to about 6 wt. % of ethanol.

5. The azeotropic composition of claim 4 , wherein the azeotropic composition consists essentially of about 96.6 wt. % HFMOP and about 3.4 wt. % ethanol, wherein the azeotropic composition has a substantially constant boiling point of about 47° C. at atmospheric pressure.

6. The azeotropic composition of claim 1 , wherein the azeotropic composition contains about 91 wt. % to about 97 wt % HFMOP and about 3 wt. % to about 9 wt. % methanol.

7. The azeotropic composition of claim 6 , wherein the azeotropic composition consists essentially of about 94.1 wt. % HFMOP and about 5.9 wt. % methanol, wherein the azeotropic composition has a substantially constant boiling point of about 43° C. at atmospheric pressure.

8. The azeotropic composition of claim 1 , wherein the azeotropic composition contains about 52 wt. % to about 58 wt % HFMOP and about 42 wt. % to about 48 wt. % trans-1,2-DCE.

Assignees

• Illinois Tool Works

Inventors

• Ye Zhihong

Classifications

• C11D7/5063

  Halogenated hydrocarbons containing heteroatoms, e.g. fluoro alcohols · CPC title

• C11D7/242

  branched · CPC title

• C11D7/5081 Primary

  the oxygen-containing solvents being alcohols only · CPC title

• C11D7/509 Primary

  Mixtures of hydrocarbons and oxygen-containing solvents · CPC title

• C11D7/241

  linear · CPC title