Detailed Project Report on Precipitated Silica

PRECIPITATED SILICA

[EIRI/EDPR/1393] (J.C.: 169)

INTRODUCTION

Precipitated Silica (also called particulate silica) is composed of aggregates of ultimate particles of colloidal size that have not become linked in massive gel network during the preparation process.

It is an amorphous form of silica, the word amorphous denotes a lack or crystal structure, as defined by x-ray difraction. Early interest in amorphous silica was urely academic.

It was reported in 1640 that amorphous silica in the presence of excess alkali become a liquid and that subsequent neutralization of the liquid with acid caused precipitation of silica. In 1861 it was found that a silica sol formed a hydrogen if the solution was not stabilized by dialysis to remove electrolytes.

Amorphous silica can be broadly divided into three categories. Vitreous silica or glass made by fusing quartz, Silica made inadiating either amorphous or crystalline silica with high speed neutrons & Micro amorphous silica. Micro amorphous silica includes sols, gels powders & porous glasses, all of which are composed of ultimate particles or structural units less than 1/um. in diameter. These silica have high surface area, generally greater than 3m2/g. Micro amorphous silica can be further divided into microparticulate silica microscopic sheets & fibers & hydrated amorphous silica. The microparticulate silica are the most important group commercially & include pyrogenic silicas & silicas precipitated from aqueous solution.

Pyrogenic silicas are formed at high temperature by condensation of Sio2 from the vapour phase, or at lower tern by chemical reaction in the vapour phase followed, by condensation. Silica formed in aqueous solution can occur as sols, gels or particles. A gel has a three-dimentional, Continuous structure, where as a sol is a stable dispersion of fine particles. Macroscopic particles are formed by aggregation of smaller particles from either a gel or so.

Amorphous silica is precipitated from super saturated solution obtained by concentrating an under saturated solution a hot saturated solution, or generating Si(OH)4 of silica ester SiH4, Sis2, Sicl4 or Si.

Precipitated Silica prepared by the action of acid on a solution of soluble silicate are of fine controlled particle size & porous in nature. Precipitated silica powders have a more open structure with higher volume than dried pulverized gels. The physical & chemical properties or precipitated silica vary according to the manufacturing process. Ultimate & ggregate particle size in silicas precipitated from solution can be varied by reinforcement & control of suspension PH., temperature & salt content. The particle size in pyrogenic silicas is controlled by combustion conditions. The surface area as determined by nitrogen adsorption, is a function of particle size.

COST ESTIMATION

Plant Capacity            10 MT/Day

Land & Building (5000 sq.mt.)    Rs. 7.46 Cr

Plant & Machinery                    Rs. 1.41 Cr

Working Capital for 2 Months    Rs. 2.35 Cr

Total Capital Investment          Rs. 11.73 Cr

Rate of Return                          17%

Break Even Point                      61%

CONTENTS

PRODUCT INTRODUCTION

MARKET SURVEY

PROPERTIES OF SODIUM SILICATE

PROPERTIES AND USES

PRESENT MANUFACTURERS OF PRECIPITATED SILICA

CHARACTERIZATION OF PRECIPITATED SILICA MORPHOLOGY

MANUFACTURING PROCESS

OTHER RELATED INFORMATIONS

PRECIPITATED SILICA

REINFORCED PRECIPITATED SILICA

MICROPOROUS PRECIPITATED SILICA

READILY DISPERSIBLE PRECIPITATED SILICA

SUPPLIERS OF PLANT & MACHINERIES

MANUFACTURERS/SUPPLIERS OF RAW MATERIALS

APPENDIX – A:

01. PLANT ECONOMICS

02. LAND & BUILDING

03. PLANT AND MACHINERY

04. OTHER FIXED ASSESTS

05. FIXED CAPITAL

06. RAW MATERIAL

07. SALARY AND WAGES

08. UTILITIES AND OVERHEADS

09. TOTAL WORKING CAPITAL

10. TOTAL CAPITAL INVESTMENT

11. COST OF PRODUCTION

12. TURN OVER/ANNUM

13. BREAK EVEN POINT

14. RESOURCES FOR FINANCE

15. INSTALMENT PAYABLE IN 5 YEARS

16. DEPRECIATION CHART FOR 5 YEARS

17. PROFIT ANALYSIS FOR 5 YEARS

18. PROJECTED BALANCE SHEET FOR (5 YEARS)