In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of

A

Concrete

B

Wood

C

Steel

D

Porcelain

Mercury cells for caustic soda manufacture, compared to diaphragm cells

A

Require lower initial investment

B

Require more power

C

Produce lower concentration NaOH

D

None of these

Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?

A

Na₂CO₃

B

NaHCO₃

C

H₂

D

None of these

In the kraft (sulphate) process for the paper manufacture, the digestor is made of

A

Cast iron

B

Stainless steel

C

Karbate carbon

D

Wrought iron

Black liquor is converted into white liquor by

A

Evaporation and burning the concentrate followed by causticisation of products

B

Multi-effect evaporation only

C

Selective liquid extraction

D

Extractive distillation

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

A

High cost of mercury

B

High specific gravity of mercury

C

Non-availability of high purity mercury

D

Pollution of water stream by mercury

Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.

A

Waxes

B

Mercaptans

C

Asphalt

D

Diolefins

The manufacture of Kraft pulp is done by a/an __________ process.

A

Alkaline

B

Acidic

C

Neutral

D

None of these

The major constituent of black liquor generated during paper manufacture is sodium

A

Sulphate

B

Carbonate

C

Hydroxide

D

Bi-carbonate

Black liquor generated during paper manufacture is concentrated in a

A

Single effect evaporator

B

Single effect evaporator followed by a crystalliser

C

Multiple effect evaporator

D

Multiple effect evaporators followed by a crystalliser

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

Related Questions