Patent ID: 7906691

Claim:
A process for preparing dichloropropanol, comprising (a) reacting glycerol, an ester of glycerol or a mixture thereof with a chlorinating agent comprising hydrogen chloride, and (b) at least one other step, carried out in apparatus made from or covered with a material resistant to the chlorinating agent under the conditions in which this step is realized, wherein the at least one other step is a step of storage, supply, withdrawal, transfer, chemical treatment, or of physical treatment selected from the physical operations of separation by stripping, distillation, evaporation, extraction, decantation and filtration, of one or more compounds used in and/or produced in the process for preparing the dichloropropanol, and wherein the material resistant to the chlorinating agent is selected from one or more of tantalum, tantalum alloys, zirconium, zirconium alloys, titanium, titanium alloys, platinum and the metals of the platinum group, silver and silver-gold-palladium alloys with a minimum of 30% gold, gold and gold-silver alloys and gold-platinum alloys, molybdenum, copper-tantalum and copper-niobium alloys, tin-antimony alloys containing 5% antimony, tin-nickel alloys, niobium and niobium-tantalum alloys, enamel, high-density polyethylene, fluoroelastomer-based elastomers, thermoplastics based on polypropylene, on fluoro polymers, acrylonitrile-butadiene-styrene copolymers, acrylonitrile (40%)-vinyl chloride (60%) copolymer, polysulphones, polyphenylene sulphides and polyphenyl sulphones, glass-resin laminates based on polyester resins, on phenolic resins, on furan resins, and on epoxy resins, ceramics based on alumina and corundum, metalloceramic materials based on hafnium carbide and titanium nitride, refractory materials based on silicon carbide, on silica, on high-silica-content aluminium silicates, on zirconium silicate, on zirconium oxide and on sillimanite (Al 2 O 3 —SiO 2 ), coatings based on phenol-formaldehyde resin, acid-resistant cements based on silicates, on phenol-formaldehyde resin and on sulphide mixed with quartz sand, self-curing acid-resistant cements based on phenol-formaldehyde resins admixed with graphite, furfuryl alcohol resins admixed with graphite, epoxy resins admixed with carbon, polyester resins admixed with quartz, graphite, impregnated graphite, quartz, porcelain, earthenware and acid-resistant brick.