NRDC Technology offer - Precipitated Silica-Thickening Grade

PLANT PARAMETERS
Capacity		5 MT/day or 1500MT/annum
No.of Shifts per day		3
Working days per Year.		300
Land Area, m²		10000 sq. mt.
Covered Area, m²		2500 sq. mt.
MANPOWER
Managerial		1
Skilled		35
Unskilled		20
RAW MATERIAL/DAY
Sodium Silicate (Glass)			6.25 MT
Sulfuric Acid (Oleum)			2.5 MT
UTILITIES/DAY
Power	1750 KWH
Water	150 KL
Steam	10 Tons
Fuel (Kerosene)	1750 Lits.
PLANT & MACHINERY
Fluidised bed coal fired boiler				1
Digestor for sodium silicate glass				2
Silicate storage tanks				6
SS 316 reactor jacked				1
Instrumentation & flow controls				--
Plate & frame type filter press				2
Flash drier having water evaporation				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 by all toothpaste manufacturers – both gel &

opaque as it gives thickening property (Body) to the toothpaste.

SPECIFICATIONS

S.No.	Properties	Unit	Specified Limit
1.	Appearance	-	White free flowing powder
2.	Moisture Content (105^oC, 2 hrs)	%	6.0 max
3.	Loss on Ignition (100^oC, 2 hrs) (Anhydrous basis)	%	5.0 max
4.	Bulk Density (tapped 50)	gm/lit	80-120
5.	pH Value(5% aq. Slurry)	--	6 – 7
6.	Sorbitol Absorption Value (SAV)	%	550 min
7.	Si₂O Content (Anhydrous basis)	%	98.5 min
8.	Soluble Salts (Sulfates+Chlorides)	%	1.00 max
9.	Iron Content, (As FE⁺³ )	Ppm	220 max
10.	Surface Area	M²/gm	215 ± 15
11.	Residue on 325 mesh	%	1 max
12.	Microbial (1) TVC (2) Y&M	Cfu/gm Cfu/gm	300 max 10 max

PROCESS

Sodium silicate glass is digested in a digestor at high temp. and pressure and solution of desired concentration of sodium silicate solution is obtained. Using above solution and dilute-sulfuric acid, reaction is carried out in a reactor in 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 in the plate and frame filter press to remove soluble salts generated during the reaction. The wet cake from filter press is then dried in flash drying system.

The flash dried product in powder form is directly then packed in 25 kgs. HDPE bags.

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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