Method of deodorizing a formulation containing at least one compound bearing a thiol group and deodorized formulation thus obtained
AssigneeL'oreal
InventorHerve Burgaud
Life of this patent
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Abstract
Method of deodorizing in order to remove malodorous compounds which are present in or formed from a liquid formulation containing at least one compound bearing a thiol functional group, of formula: HS--A--Y--B (I) in which: 1) the liquid formulation is placed in contact with an inert membrane which is permeable to the malodorous compounds and impermeable to the compound(s) of formula (I); and 2) the malodorous compounds which have passed through the membrane are placed in contact with at least one chemical substance reacting with the said malodorous compounds and/or with at least one physical adsorption substance having a large specific surface area which binds the said malodorous compounds.
Claims8
A method to deodorize a liquid formulation so as to remove a malodorous compound present in a liquid formulation, said method comprising providing a liquid formulation containing a compound having the formula
- HS--A--Y--B (I)
- wherein
- Y represents --COO-- or --NH-- and
- (a) when Y represents --COO--
- A represents --(CH.sub.2).sub.n wherein n is 1 or 2, or ##STR4## wherein R represents linear or branched C.sub.1 -C.sub.3 alkyl, and B represents H, --CH.sub.2 --CH.sub.2 OH, --CH.sub.2 --CHOH--CH.sub.2 OH, ##STR5## (b) when Y represents --NH-- A represents --CH.sub.2 --CH.sub.2 -- or ##STR6## wherein R' represents H, methyl or ethyl, B represents H or when A represents --CH.sub.2 --CH.sub.2 -- B also represents --CO--R" wherein R" represents linear or branched C.sub.1 -C.sub.4,
- said method comprising
- contacting said liquid formulation with an inert membrane which is permeable to said malodorous compound and impermeable to said compound of formula (I), and
- contacting said malodorous compound having passed through said inert membrane with a physical adsorption substance having a surface area sufficient to bind said malodorous compound.
Dependencies are inferred from the claim text.