R05220803-chemical-technology

Set No. 1

Code No: R05220803

II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 CHEMICAL TECHNOLOGY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Explain the production of soda ash from brine solution with block diagram. (b) How chlorine can be produced by Kel-Chlor process.

[12+4]

2. (a) Discuss about purification of hydrogen. (b) Draw a neat sketch of Linde double column and name its components. [8+8] 3. (a) Describe in brief the production of sulfur by Frasch process. (b) Discuss the selection of catalyst in the manufacture of sulphuric acid. [10+6] 4. What is cement? Explain the production of cement by cement rock beneficiation process with a flow diagram. [16] 5. Describe any one method of manufacturing vinyl chloride.

[16]

6. What are the various steps involved in the production of oil by mechanical expelling and refining? Explain them briefly. [16] 7. What are the various steps involved in the production of final commercial soap starting from the basic raw materials? Explain them briefly. [16] 8. Give the comparison of three major acid, alkaline and neutral pulping processes. [16] ⋆⋆⋆⋆⋆

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Set No. 2

Code No: R05220803

II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 CHEMICAL TECHNOLOGY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Give the electrolysis reactions that occurs in mercury and diaphragm cell. (b) What is a multiple effect evaporation? What is its significance in the manufacturing of chlorine-caustic soda production? [8+8] 2. What is a water gas? Explain its production with a neat flow diagram.

[16]

3. (a) Explain the manufacturing of Aluminum Sulphate. (b) Write short notes on rare earth compounds. 4. Explain the production of magnesium hydroxide from sea water.

[10+6] [16]

5. (a) Describe various applications of PVC, with emphasizing the properties of PVC. (b) Write advantages or disadvantages of solution polymerization over emulsion polymerization. [8+8] 6. (a) Give a brief account on the use of edible and essential oils as a chemical raw material by the industry. (b) Discuss the advantages and disadvantages of production oils by mechanical and solvent extraction methods. [8+8] 7. Describe in detail the continuous hydrolysis and saponification process for the soap manufacture with block diagram. [16] 8. (a) List out various raw materials used for the production of pulp. (b) What are the various steps generally involved in pulping process? Briefly explain them. [4+12] ⋆⋆⋆⋆⋆

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Set No. 3

Code No: R05220803

II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 CHEMICAL TECHNOLOGY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Discuss the engineering problems involved in the manufacture of soda ash by Solvay process. (b) Explain the electrolysis of aqueous solution by the mercury cell process. [8+8] 2. What is a water gas? Explain its production with a neat flow diagram.

[16]

3. (a) Give the chemical reactions involved in the production of sulphur from iron pyrites. (b) Discuss about the major engineering problems involved in the manufacture of sulfuric acid by contact process. [8+8] 4. Describe the manufacture of Portland cement with neat block diagram. Discuss the major engineering problems. [16] 5. Describe any one method of manufacturing vinyl chloride.

[16]

6. Describe the solvent extraction method of producing oils with a neat flow sheet. [16] 7. Mention different methods for soap production and explain any method.

[16]

8. Describe the Alkaline pulping process with block diagram.

[16]

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Set No. 4

Code No: R05220803

II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 CHEMICAL TECHNOLOGY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Give a comparison among mercury process, diaphragm process, membrane process available for the production of chlorine-caustic soda . (b) Write short notes on: i. Glass laminates ii. Water glass.

[8+8]

2. What is a producer gas? Explain its production with a neat flow diagram.

[16]

3. Describe the extraction of sulphur by Frasch process.

[16]

4. (a) Discuss in detail about types of Portland cements. (b) Write short notes on: i. Pozzolans. ii. Polymer concrete

[8+8]

5. Describe the manufacture of Phenol- Formaldehyde with neat block diagram. [16] 6. (a) Discuss about the chemical composition of oils and fats. (b) Discuss the hydrogenation of oils briefly.

[8+8]

7. Mention different methods for soap production and explain any method.

[16]

8. Discuss the following with respect to paper production (a) Blending of different pulps (b) Addition of fillers (c) Difference between wet and dry process (d) Addition of dyes.

[4+4+4+4] ⋆⋆⋆⋆⋆

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