DICALCIUM PHOSPHATE (FROM SULPHURIC ACID) CAP: 6TPD

Dicalcium phosphate is the calcium phosphate with the formula CaHPO4 and its dihydrate. The “di” prefix in the common name arises because the formation of the HPO42– anion involves the removal of two protons from phosphoric acid, H3PO4. It is also known as dibasic calcium phosphate or calcium monohydrogen phosphate.

Dicalcium phosphate is used as a food additive, it is found in some toothpastes as a polishing agent and is a biomaterial.

Dibasic calcium phosphate is produced by the neutralization of calcium hydroxide with phosphoric acid, which precipitates the dihydrate as a solid. At 60°C the anhydrous form is precipitated:

H3PO4 + Ca(OH)2 → CaHPO4

To prevent degradation that would form hydroxyapatite, sodium pyrophosphate or rimagnesium phosphate octahydrate are added when for example, dibasic calcium phosphate dihydrate is to be used as a polishing agent in toothpaste.

In a continuous process CaCl2 can be treated with (NH4)2HPO4 to form the dihydrate:

CaCl2 + (NH4)2HPO4 → CaHPO4•2H2O

A slurry of the dihydrate is then heated to around 65–70°C to form anhydrous CaHPO4 as a crystalline precipitate, typically as flat diamondoid crystals, which are suitable for further processing.

Dibasic calcium phosphate dihydrate is formed in “brushite” calcium phosphate cements (CPC’s), which have medical applications. An example of the overall setting reaction in the formation of “β-TCP/MCPM” (β-tricalcium phosphate/monocalcium phosphate) calcium phosphate cements is:

INTRODUCTION
THREE FORMS OF DICALCIUM PHOSPHATE ARE KNOWN:
USES AND APPLICATION
MARKET SURVEY
PRODUCTION OF DICALCIUM PHOSPHATE
INSTALLED CAPACITY, UTILIZATION OF DICALCIUM PHOSPHATE
APPARENT CONSUMPTION OF DICALCIUM PHOSPHATE
EXTIMATED DEMAND OF DICALCIUM PHOSPHATE
EXPORT DATA OF DICALCIUM PHOSPHATE FORM INDIA
IMPORT DATA OF DICALCIUM PHOSPHATE
ANIMAL FEEDS: PHOSPHATE SUPPLEMENTS
GLOBAL MARKET OF DICALCIUM PHOSPHATE
MAJOR KEY PLAYERS
GLOBAL DICALCIUM PHOSPHATE MARKET BY REGION
B.I.S. SPECIFICATION
SUPPLING PHOSPHORUS TO THE ANIMAL
ORGANIC PHOSPHORUS OF PLANT ORIGIN.
PHOSPHORUS OF ANIMAL ORIGIN.
INORGANIC FEED PHOSPHATES
OUT LINE OF DICALCIUM PHOSPHATE PRODUCTION USING SULPHURIC ACID
PROCESS OF MANUFACTURE IN DETAILS
THE STEPS INVOLVE IN THE MANUFACTURE OF DICALCIUM PHOSPHATES
ARE AS FOLLOWS.
THE STEP TAKEN IN PHOSPHORIC ACID PRODUCTION ARE AS FOLLOWS.
RAW MATERIALS
THE FOLLOWING REQUIREMENTS ARE CONSIDERED:
PRECIPITATION OF DICALCIUM PHOSPHATE
SPECIFICATION OF DICALCIUM PHOSPHATE
PROCESS FLOW DIAGRAM
MANUFACTURE OF FEED GRADE DICALCIUM PHOSPHATE
QUALITY CONTROL AND CHEMICAL ANALYSIS
UNDESIRABLE ELEMENTS IN INORGANIC FEED PHOSPHATES
SUPPLIERS OF RAW MATERIALS
ROCK PHOSPHATE
SULPHURIC ACID
HYDRATED LIME
LABORATORY CHEMICALS
SUPPLIERS OF PLANT AND MACHINERY
GRINDER
REACTORS
EVAPORATORS
MIXER
DRYER
STORAGE TANKS
CENTRIFUGE
PULVERIZERS
MATERIAL HANDLING EQUIPMENTS
LABORATORY EQUIPMENTS
BOILERS
INSTRUMENTATION AND PROCESS CONTROL EQUIPMENTS
D.G. SETS

APPENDIX – A:

1.      COST OF PLANT ECONOMICS
2.      LAND & BUILDING
3.      PLANT AND MACHINERY
4.      FIXED CAPITAL INVESTMENT
5.      RAW MATERIAL
6.      SALARY AND WAGES
7.      UTILITIES AND OVERHEADS
8.      TOTAL WORKING CAPITAL
9.      COST OF PRODUCTION
10.      PROFITABILITY ANALYSIS
11.      BREAK EVEN POINT
12.      RESOURCES OF FINANCE
13.      INTEREST CHART
14.      DEPRECIATION CHART
15.      CASH FLOW STATEMENT
16.      PROJECTED BALANCE SHEET