Title:
IMPROVED METHOD FOR PROCESSING MAGNESIUM CHLORIDE SOLUTIONS AND METHOD FOR MANUFACTURING CARBOXYLIC ACIDS
Document Type and Number:
WIPO Patent Application WO/2017/125496
Kind Code:
A3
Abstract:
The invention pertains to a method for processing magnesium chloride solutions comprising the steps of - providing an aqueous magnesium chloride solution with a magnesium chloride concentration of 10-30 wt. % to a concentration step where water is evaporated, resulting in a concentrated magnesium chloride solution with a magnesium chloride concentration of 30-50 wt.%, wherein the concentration step is carried out in one or more stages, wherein at least one of the stages is conducted at elevated pressure, - withdrawing the concentrated magnesium chloride solution from the concentration step, and providing it to a thermohydrolysis reactor, the reactor being at a temperature of at least 300°C, - withdrawing MgO from the thermohydrolysis reactor in solid form, and withdrawing a HC1 containing gas stream having a temperature of at least 300°C from the thermohydrolysis reactor, - providing the HC1-containing gas stream having a temperature of at least 300°C to a cooling step, where the HC1-containing gas stream is contacted with a cooling liquid, - withdrawing a HC1-containing gas stream with a temperature below 150°C from the cooling step, - circulating the cooling liquid through a heat exchanger where energy from the cooling liquid is transferred to a heating liquid which circulates from the heat exchanger to the concentration step. The invention also pertains to a method for manufacturing carboxylic acids, which comprises, among other steps, the processing of the magnesium chloride solutions as described above.
Inventors:
DE VRIES JOHANNES JEICHIENUS (NL)
FREDIANSYAH RAYMON (NL)
FREDIANSYAH RAYMON (NL)
Application Number:
PCT/EP2017/051087
Publication Date:
August 31, 2017
Filing Date:
January 19, 2017
Export Citation:
Assignee:
PURAC BIOCHEM BV (NL)
International Classes:
C01F5/10; C01B7/03; C01F5/30; C07C51/02
Foreign References:
| GB1311757A | 1973-03-28 | |||
| US3980753A | 1976-09-14 |
Attorney, Agent or Firm:
DE VRIES & METMAN et al. (NL)
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