METHOD FOR PREPARING A HYDROLYZATE

1 . An organic phase composition comprising

(a) a first solvent (S1) characterized by water solubility of less than 10% and by at least one of (a1) having a polarity related component of Hoy's cohesion parameter (delta-P) between 5 and 10 MPa½ and (b1) having a Hydrogen bonding related component of Hoy's cohesion parameter (delta-H) between 5 and 20 MPa½;

(b) a second solvent (S2) characterized by water solubility of at least 30% and by at least one of (a2) having a delta-P greater than 8 MPa/2 and (b2) having a delta-H greater than 12 MPa/2;

(c) water

(d) HCI, and

(e) a chloride salt.

2 . The composition according to claim 1 , wherein S2 is selected from the group consisting of C1-C4 mono- and or poly-alcohols, aldehydes and ketones.

3 . (canceled)

4 . The composition according to claim 1 , wherein said chloride salt is selected from the group consisting of chlorides of calcium and of heavy metals.

5 . The composition according to claim 1 , wherein the S1/S2 weight/weight ratio is in the range between 10 and 0.5.

6 . The composition according to claim 1 , wherein the HCI/water weight/weight ratio is greater than 0.15.

7 . (canceled)

8 . The composition according to claim 1 , wherein the chloride salt concentration is in a range between 0.01% wt and 5% wt.

9 .- 10 . (canceled)

11 . A method for the separation of HCI from a chloride salt comprising

(i) providing an aqueous feed solution comprising HCI and a chloride salt;

(ii) bringing said aqueous feed solution into contact with a first extractant comprising a first solvent S1 characterized by water solubility of less than 10% and by at least one of (a1) having a delta-P between 5 and 10 MPa½ and (b1) having a delta-H between 5 and 20 MPa½, whereupon HCI selectively transfers to said first extractant to form an HCI-carrying first extract and an HCI-depleted aqueous feed;

(iii) bringing said HCI-depleted aqueous feed solution into contact with a second extractant comprising S1 and a second solvent S2 characterized by water solubility of at least 30% and by at least one of (a2) having a delta-P greater than 8 MPa½ and (b2) having a delta-H greater than 12 MPa½, whereupon HCI selectively transfers to said second extractant to form an organic composition according to claim 1 and claim 10 and a further HCI-depleted aqueous feed; and

(iv) recovering HCI from said first extract.

12 . The method according to claim 7 , wherein said aqueous feed is a product of leaching a mineral with HCI.

13 . The method according to claim 11 , wherein said mineral is rich in titanium.

14 .- 16 . (canceled)

17 . The method according to claim 7 , wherein said delta-P of said second extractant is greater than said delta-P of said first extractant by at least 0.2 MPa½.

18 . The method according to claim 7 , wherein said delta-H of said second extractant is greater than said delta-H of said second extractant by at least 0.2 MPa½.

19 .- 20 . (canceled)

21 . The method according to claim 7 , further comprising removing S2 from the organic composition formed in step (iii), to generate said first extractant

22 . and a heavy aqueous phase and separating said heavy phase from said first extractant.

23 . The method according to claim 12 , wherein the HCI/water weight/weight ratio in said heavy phase is smaller than that ratio in the HCI-depleted aqueous feed.

24 . The method according to claim 12 , wherein the HCI/salt weight/weight ratio in said heavy phase is smaller than that ratio in the HCI-depleted aqueous feed.

25 . The method according to claim 7 , wherein the HCI/water weight/weight ratio in said first extract is greater than that ratio in the organic composition of step (iii) by at least 10%.

26 . The method according to claim 7 , wherein the HCI/water weight/weight ratio in said first extract is greater than that ratio in the aqueous feed by at least 10%.

27 . The method according to claim 7 , wherein the HCI/salt weight/weight ratio in said first extract is greater than that ratio in the organic composition of step (iii) by at least 10%.

28 . (canceled)

29 . The method according to claim 7 , wherein the HCI/salt ratio in said further depleted aqueous feed is smaller than 0.05.

30 . The method according to claim 7 , wherein said provided aqueous feed comprises an impurity, wherein the impurity/salt ratio in said feed is R1, wherein the impurity/salt ratio in said further depleted aqueous feed is R2 and wherein R1/R2 is greater than 1.5.

31 . (canceled)

32 . The method according to claim 30 , wherein said impurity is another salt.