oхт 2

Ecologically pure raw materials for sulphuric acid production:

• Sulphur

• Iron pyrite

• Waste gases

• Phosphogypsum

• Copper sulphide

Parameter of reactor cellular model is:

• Number of cascade sections

• Reagent concentration

• Temperature

• Rate of chemical reaction

• Conversion degree

Select secondary energy resource used in contact sulphuric acid production:

• SO2 oxidation reaction heat

• Smoke gas

• Waste steam

• Secondary steam

• Neutralization reaction heat

The catalyst for ammonia oxidation:

• Pt - Pd - Rh

• V2O5

• Ni - Pd

• Fe2O3

• AL2O3

Electromagnetic method of raw materials enrichment is based on separation of components by:

• Magnetic permeability

• Specific weights

• Wettability

• Non-metals presence in it

• Electric conductivity

Limitation by reagents excess in reversible processes is connected with:

• Increasing of reaction apparatuses capacity and energy expenses

• Increasing of reverse reaction rate

• Increasing of products concentration

• Increasing of production cost due to increasing of expenses for raw materials

• Side reactions behavior

Water temporary hardness is predetermined by content in water:

• Calcium and magnesium hydrocarbonates

• Sodium and potassium hydrocarbonates

• Calcium and magnesium chlorides, nitrates and sulphates

• Sodium chlorides, nitrates and sulphates

• Calcium hydrocarbonates and chlorides

What kind of processes does evaporation grade to?

• Phase transition

• Hydromechanical

• Mechanical

• Mass exchange

• Chemical

Basic advantage of electrochemical method of caustic soda production:

• High purity degree of a product

• Low energy expenses

• High process rate

• High equipment corrosion

• Low caustification degree

The principle that determines basic laws of chemical kinetics - Reaction rate is:

• Proportional to concentrations of reactants

• Proportional to the applied pressure

• Proportional to the process duration

• Determined by the rate of diffusion processes

• Determined by the rate of mass transfer