Specifications

The Patent Office Journal 17/12/2010
4529
(12) PATENT APPLICATION PUBLICATION (21) Application No.3932/CHENP/2010 A
(19) INDIA
(22) Date of filing of Application :24/06/2010 (43) Publication Date : 17/12/2010
(54) Title of the invention : REMOVAL OF SILICON FROM BRINE
(51) International classification :C01D3/16
(31) Priority Document No :10 2007 063 346.9
(32) Priority Date :28/12/2007
(33) Name of priority country :Germany
(86) International Application No
Filing Date
:PCT/EP2008/011079
:23/12/2008
(87) International Publication No
:WO 2009/083234
A1
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(71)Name of Applicant :
1)UHDE GMBH
Address of Applicant :FRIEDRICH-UHDE-STRASSE 15,
44141 DORTMUND. Germany
(72)Name of Inventor :
1)POHL, WERNER
2)STEGEMANN, CHRISTOPH
3)PELKONEN, SAMI
(57) Abstract :
Process for removing silicon compounds from aqueous NaCl brine, first a pH value of less than 3 being adjusted in a weak brine
containing hydrochloric acid, iron(III) chloride or other trivalent iron ions being added to said acidified weak brine, the obtained weak
brine being continuously fed to a stirred dissolution vessel which contains undissolved salt in addition to brine, fresh salt being
charged batchwise and intermittently to the dissolution vessel, the obtained strong brine being fed to a stirred buffer vessel, the pH
value in this buffer vessel being maintained at a level ranging from 5 to 8,a strong-brine flow being continuously withdrawn from the
buffer vessel and filtered, and the filtrate containing the added iron and silicon being discharged, as well as a contrivance for carrying
out the described process, consisting of a dissolution vessel for salt, a stirrer in the dissolution vessel, a feed device for batchwise
feeding salt to the dissolution vessel, a point for feeding weak brine to the dissolution vessel, points for feeding hydrochloric acid and
iron(III) chloride to the weak brine supply line, a buffer vessel for strong brine, a stirrer in the buffer vessel, a flow connection
between the dissolution vessel and the buffer vessel, a filter having an outlet for strong brine and a withdrawing device for filter cake,
a discharge port and a device for conveying strong brine from the buffer vessel to the filter.
No. of Pages : 12 No. of Claims : 11