Sodium Chloride → Epichlorohydrin

HRID 1707878Notes

Reaction equation

HRID 1707878 reaction equation
C1C(=O)OC(=O)C=1.[Na+].[Cl-:9].[CH2:10]([CH:12]1[O:14][CH2:13]1)[Cl:11].[OH-:15].[Na+]>O>[CH2:10]([CH:12]1[O:14][CH2:13]1)[Cl:11].[Cl:9][C:10]([Cl:11])([OH:15])[CH2:12][CH3:13]

Participants

7

Reactant 4

HCID 5234Sodium ChlorideHCID 7835EpichlorohydrinHCID 7923Maleic AnhydrideHCID 14798Sodium Hydroxide

Product 2

HCID 7835EpichlorohydrinHCID 444122,2-Dichloropropanol

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A sulfonation flask is charged with 87.5 pans of hydrolysed polymaleic anhydride (0.5 COOH equivalents, molecular weight 500-2,000, e.g. Belclene® 200), 80 parts of water and 3 parts of NaCl. After 31 parts of epichlorohydrin have been added, the reaction mixture is heated to 80°-85° C. for about 1 hour, cooled down to room temperature and neutralised with sodium hydroxide solution (pH about 6.8). Excess epichlorohydrin and dichloropropanol formed in the course of the reaction are then distilled off azeotropically. After adjustment to a solids concentration of 50%, the product is a mixture of 35% of polymer, 15% of 3-chloro-1,2-propanediol and 50% of water.

Workup

  1. temperaturethe reaction mixture is heated to 80°-85° C. for about 1 hour

Sources & evidence

ORD record
ord-0263bce7d66c485295d5bd4e32b653fb
Source dataset
uspto-grants-1994_10
Patent number
US05356442

Reaction notes

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