Title of Invention	PROCESS TO PRODUCE SODIUM SULFATE AND MAGNESIUM HYDROXIDE
Abstract	This invention refers to a novel process to obtain magnesium hydroxide and sodium sulfate from a solid raw material, which contains sodium and magnesium soluble salts, preferably in the form of sulfates, coming from a natural source or as a byproduct of an industrial process. The process consisting in the conditioning of the raw material to guarantee the correct concentrations of sodium and magnesium sulfates that is subjected to a salting-out crystallization when mixed with sodium sulfate obtaining sodium sulfate; the resulting solution is subjected to an alkali treatment to precipitate the magnesium hydroxide and the mother liquor is fed to a regeneration stage of the alkali used in the precipitation of the magnesium hydroxide as well in the sodium sulfate solution for the crystallization. The crystallization can be performed as a multistage process countercurrent to increase the purity of sodium sulfate.

Title of Invention

PROCESS TO PRODUCE SODIUM SULFATE AND MAGNESIUM HYDROXIDE

Abstract

This invention refers to a novel process to obtain magnesium hydroxide and sodium sulfate from a solid raw material, which contains sodium and magnesium soluble salts, preferably in the form of sulfates, coming from a natural source or as a byproduct of an industrial process. The process consisting in the conditioning of the raw material to guarantee the correct concentrations of sodium and magnesium sulfates that is subjected to a salting-out crystallization when mixed with sodium sulfate obtaining sodium sulfate; the resulting solution is subjected to an alkali treatment to precipitate the magnesium hydroxide and the mother liquor is fed to a regeneration stage of the alkali used in the precipitation of the magnesium hydroxide as well in the sodium sulfate solution for the crystallization. The crystallization can be performed as a multistage process countercurrent to increase the purity of sodium sulfate.

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Patent Number

269982

Indian Patent Application Number

1923/MUMNP/2008

PG Journal Number

48/2015

Publication Date

27-Nov-2015

Grant Date

23-Nov-2015

Date of Filing

08-Sep-2008

Name of Patentee

SERVICIOS ADMINISTRATIVOS PENOLES S.A. DE C.V.

Applicant Address

CALZADA MANUEL GOMEZ MORIN NO.444, COL. TORREON RESIDENCIAL, TORREON COAHUILA.C.P.27268, MEXICO

Inventors:

#	Inventor's Name	Inventor's Address
1	BENAVIDES PEREZ, RICARDO	PROLONGACION COMONFORT S/N, ANTIGUA ADUANA, COLONIA LUIS ECHEVERRIA, C.P. 27300, TORREON COAHUILA,
2	MARTINEZ MARTINEZ, JESUS MANUEL	PROLONGACION COMONFORT S/N, ANTIGUA ADUANA, COLONIA LUIS ECHEVERRIA, C.P. 27300, TORREON COAHUILA,
3	GARCIA LOPEZ, ARMANDO	PROLONGACION COMONFORT S/N, ANTIGUA ADUANA, COLONIA LUIS ECHEVERRIA, C.P. 27300, TORREON COAHUILA,
4	BOCANEGRA ROJAS, JOSE GERTRUDIS	PROLONGACION COMONFORT S/N, ANTIGUA ADUANA, COLONIA LUIS ECHEVERRIA, C.P. 27300, TORREON COAHUILA,

PCT International Classification Number

C30B29/22

PCT International Application Number

PCT/MX2007/000153

PCT International Filing date

2007-12-14

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA