NRDC Technology offer - Precipitated Silica-Anti Blocking Grade

PLANT PARAMETERS
Capacity		2.5 MT/day or 750MT/annum
No. of Shifts per day		3
Working days per Year.		300
Land Area, m²		10000
Covered Area, m²		1350
MANPOWER
Managerial		1
Skilled		19
Unskilled		9
RAW MATERIAL/DAY
Sodium Silicate (Glass)		3.125 MT
Sulfuric Acid(Oleum)		1.25 MT
Sodium Sulfate
UTILITIES/DAY
Power	1000 KWH
Water	75 KL
Steam	5 Tons
Fuel (Kerosene)	1000 Lits
PLANT & MACHINERY
Fluidised bed coal fired boiler			1
Digestor for sodium silicate glass			1
Silicate storage tanks			3
SS 316 reactor jacked			1
Instrumentation & flow controls			--
Plate & frame type filter press			1
Flash drier having water evaporation			1
Alpine fluidized bed opposed jet mill			1
Pumps with motors			8
Air compressors			2
Weighing scale			1
ECONOMICS
Know-how/turnkey fees		Negotiable
Consultancy fees		Negotiable
Operating experience		Proven
The above figures are for budgetary purpose only and subject to change in subsequent offers

USE USES

The Product is used in all polyethelene and polypropelene plastic films raw materials manufacturers i.e. Petrochemicals units producing PE & PP granules.

SPECIFICATIONS

S.No.	Properties	Unit	Specified Limit
1.	Appearance	-	White free flowing powder
2.	Moisture Content (105^oC, 2 hrs)	%	4.0 max
3.	Loss on Ignition (100^oC, 2 hrs) (Anhydrous basis)	%	4.0 max
4.	Bulk Density (tapped 50)	gm/lit	80-120
5.	pH Value(5% aq. Slurry)	--	5.5-7.5
6.	Water Absorption Value	%	200-250
7.	Si₂O Content (Anhydrous basis)	%	98.50 min
8.	Soluble Salts (Sulfates+Chlorides)	%	0.50 max
9.	Iron Content, (As FE⁺³ )	Ppm	200 max
10.	Average particle size (Malvern)	Micron	4-6
11.	Surface Area	M²/gm	325 ± 25
12.	Heavy Metals, (Expressed as Pb)	ppm	15 max

PROCESS

Sodium silicate glass is digested in a digestor at high temp. and pressure and desired concentration of sodium silicate solution is obtained. Using above sodium silicate solution and dilute-sulfuric acid, reaction is carried out in a reactor in presence of optimised quantity of electrolyte at elevated temp and in the optimised quantity of electrolyte at elevated temp and in the optimised pH range of the reaction medium.

After completion of reaction in stipulated time, product slurry is filtered and washed with water to remove soluble salts generated during the reaction. The washed cake is again reslurried before it is flash dried in flash drying system.

The product is then milled to get the desired particle size distribution of the finished product. The finished product is then packed in 15 kgs. HDPE/paper bags as per the requirement of the user industry.

National Research Development Corporation, a Government of India Enterprise, is a premier technology transfer Corporation with four decades of experience. It has helped establish over one thousand projects in the small and medium scale sector.

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