Emollient composition
An emollient composition comprising at least one hydrocarbon fluid in an amount of 50 to 100% by weight relative to the total weight of the composition is provided. The fluid can be obtained by a process of catalytically hydrogenating a feed comprising more than 85% by weight of oligomerized olefins, at a temperature from 115 to 195° C. and at a pressure from 30 to 70 bars. A cosmetic, dermatological or pharmaceutical composition comprising the emollient composition and uses thereof are also provided.
1. A process to prepare an emollient composition, the process comprising:
a step of preparing a hydrocarbon fluid by a process of catalytically hydrogenating a feed at a temperature from 115 to 195° C. and at a pressure from 30 to 70 bars, wherein the feed consists of a tetrameric propylene cut with a boiling range from 150 to 260° C., wherein the hydrocarbon fluid has a boiling range of at least 10° C. and a bromine index of less than 1 mgBr/100 g of fluid and an aniline point from 70 to 90° C., wherein the fluid contains less than 50 ppm of aromatics by weight,
wherein the emollient composition comprises from 50 to 100% by weight, relative to the total weight of the composition, of the hydrocarbon fluid.
2. The process of claim 1 , wherein the feed comprises more than 90% by weight of oligomerized olefins.
3. The process of claim 1 , wherein the hydrogenation conditions are the following:
Pressure: 40 to 60 bars;
Temperature: 125 to 185° C.;
Liquid hourly space velocity (LHSV): 0.1 to 3 hr −1 ; and
Hydrogen treat rate: 50 to 300 Nm 3 /ton of feed.
4. The process of claim 1 , wherein the catalytically hydrogenating process comprises a fractionating step which is carried out before the hydrogenating step, or after the hydrogenating step or both.
5. The process of claim 1 , wherein the fluid contains more than 80% by weight of isoparaffins.
6. The process of claim 1 , wherein the fluid has a boiling point from 150 to 260° C., and/or wherein the fluid has a boiling range below 90° C.
7. The process of claim 1 , wherein the emollient composition comprises from 90 to 100% by weight of the hydrocarbon fluid, relative to the total weight of the composition.
8. The process of claim 1 , wherein the fluid contains more than 97% by weight of C12 isoparaffins.
9. The process of claim 1 , wherein the process of catalytically hydrogenating is performed in three hydrogenation stages.
10. The process of claim 1 , wherein the process of catalytically hydrogenating is performed in three hydrogenation stages in three separate reactors.
11. The process of claim 1 , wherein the emollient composition is used in a cosmetic, dermatological, or pharmaceutical composition, the cosmetic, dermatological, or pharmaceutical composition comprising, relative to the total weight of the composition, at least 50% by weight of the hydrocarbon fluid and further comprises at least one fatty substance selected from vegetable oils, hydrocarbon oils other than the hydrocarbon fluid, vegetable butters, fatty ethers and alcohols, oily esters, alkanes and silicone oils and/or at least one additive.