Liquefied petroleum gas compositions

Claim 2

A LIQUEFIED PRETROLEUM GAS COMPOSITION CONTINING 1-500 PPM, BASED ON THE LIQUEFIED PETROLEUM GAS, OF AT LEAST ONE CARBOXYLIC ACID ESTER BOILING AT A TEMPERATURE ABOVE 200*C. AND WHICH IS LIQUID AT AMBIENT TEMPERATURE, SAID CARBOXYLIC ACID ESTER BEING SELECTED FROM THE GROUP CONSISTING OF (A) THE ESTER OF AN AROMATIC CARBOXYLIC ACID AND A 1-8 CARBON ATOMS ALIPHATIC ALCOHOL, (B) THE ESTER OF A 2-8 CARBON ATOSALIPHATIC MONOCARBOXYLIC ACID AND A 1-10 CARBON ATOM ALIPHATIC ALCOHOL, (C) THE ESTER OF A 2-8 CARBON ATOM ALIPHATIC MONOCARBOXYLIC ACID AND A 2-3 CARBON ATOM ALIPHATIC POLYHYDRIC ALCOHOL, (D) THE ESTER OF A 3-10 CARBON ATOM POLYBASIC CARBOXYLIC ACID AND A 1-10 CARBON ATOM ALIPHATIC ALCOHOL, AND (E) THE ESTER OF A 3-10 CARBON ATOM POLYBASIC CARBOXYLIC ACID AND A 2-3 CARBON ATOM ALIPHATIC POLYHYDRIC ALCOHOL.

Claim 3

A liquefied petroleum gas composition containing 1-500 ppm, based on the liquefied petroleum gas, of at least one carboxylic acid ester boiling at a temperature above 200*C. and which is liquid at ambient temperature, said carboxylic acid ester being selected from the group consisting of (a) the ester of an aromatic carboxylic acid and a 1-8 carbon atom aliphatic alcohol, (b) the ester of a 2-18 carbon atom aliphatic monocarboxylic acid and a 1-10 carbon atom aliphatic alcohol, (c) the ester of a 2-18 carbon atom aliphatic monocarboxylic acid and a 2-3 carbon atom aliphatic polyhydric alcohol, (d) the ester of a 3-10 carbon atom polybasic carboxylic acid and a 1-10 carbon atom aliphatic alcohol, and (e) the ester of a 3-10 carbon atom polybasIc carboxylic acid and a 2-3 carbon atom aliphatic polyhydric alcohol.

Claim 4

A liquefied petroleum gas composition containing 1-500 ppm, based on the liquefied petroleum gas, of at least one carboxylic acid ester boiling at a temperature above 200*C. and which is liquid at ambient temperature, said carboxylic acid ester being selected from the group consisting of (a) the ester of an aromatic carboxylic acid and a 1-8 carbon atom aliphatic alcohol, (b) the ester of a 2-18 carbon atom aliphatic monocarboxylic acid and a 1-10 carbon atom aliphatic alcohol, (c) the ester of a 2-18 carbon atom aliphatic monocarboxylic acid and a 2-3 carbon atom aliphatic polyhydric alcohol, (d) the ester of a 3-10 carbon atom polybasic carboxylic acid and a 1-10 carbon atom aliphatic alcohol, and (e) the ester of a 3-10 carbon atom polybasIc carboxylic acid and a 2-3 carbon atom aliphatic polyhydric alcohol.

Claim 5

The liquefied petroleum gas composition of claim 1 wherein said carboxylic acid ester is a member of the group consisting of methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, methyl salicylate, ethyl salicylate, ethyl phenyl acetate, methyl benzoylacetate, ethyl benzoylacetate, benzyl acetate, linalyl acetate, glycerine-1,3-diacetate, ethyl caprylate, ethyl caprate, ethyl pelargonate, methyl oleate, amyl stearate, ethyl glycerate, triacetin, triolein, acetopyruvic acid ethyl ester, ethyl levulinate, diethyl succinate, diethyl glutarate, diethyl adipate, dibutyl adipate, dibutyl sebacate, dimethyl maleate, diethyl maleate, diethyl fumarate, diethyl glutaconate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate, dioctyl phthalate, triethyl citrate, diethyl mesoxalate, acetone dicarboxylic acid diethyl ester, and diethyl-1-malate.

Claim 6

The liquefied petroleum gas composition of claim 1 wherein said carboxylic acid ester is a member selected from the group consisting of benzyl acetate, propyl benzoate, butyl benzoate, ethyl adipate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate and amyl stearate.

Claim 7

The liquefied petroleum gas composition of claim 1 wherein the amount of the said carboxylic acid ester contained therein is 5-250 ppm, based on the said liquefied petroleum gas.

Claim 8

The liquefied petroleum gas composition of claim 2 wherein the amount of the said carboxylic acid ester contained therein is 5-250 ppm, based on the said liquefied petroleum gas.

Claim 9

The liquefied petroleum gas composition of claim 3 wherein the amount of the said carboxylic acid ester contained therein is 5-250 ppm, based on the said liquefied petroleum gas.

Claim 10

The liquefied petroleum gas composition of claim 4 wherein the amount of said carboxylic acid ester is 30-200 ppm.

Claim 11

The liquefied petroleum gas composition of claim 5 wherein the amount of the said carboxylic acid ester is 30-200 ppm.