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ChE 150: Pulp and Paper Industry Reviewer

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ChE 150: Pulp and Paper Industry Reviewer

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Questions and Answers

What is the main difference between a unit process and a unit operation?

Unit process involves chemical conversion of raw materials, while unit operation involves physical conversions.

What are the roles of a Chemical Engineer in the pulp and paper industry?

Quality Assurance & Control, Safety Officer, Waste Management, Process Supervision, Process Design, Research & Development

Define paper in the context of the pulp and paper industry.

Paper is a uniform, felted sheet, composed of fibrous and nonfibrous additives, formed from a water suspension, and subsequently pressed, dried, and calendered.

What are the main products of the pulp and paper industry?

Pulp, paper, board, and other cellulose-based products Signup and view all the answers

What is the main raw material for papermaking by mechanical pulping?

Wood Signup and view all the answers

Who is credited with developing sulfate or Kraft pulping in 1879?

Carl F. Dahl Signup and view all the answers

What is the main difference in yield between mechanical pulping and chemical pulping?

95% for mechanical pulping and 45% for chemical pulping Signup and view all the answers

What is the purpose of super-calendering in the papermaking process?

To give the paper a high luster surface Signup and view all the answers

What are the typical products of mechanical pulping and chemical pulping, respectively?

Writing papers, printing papers, tissue papers; Shipping containers, grocery bags, corrugated boxes Signup and view all the answers

What is the main application of paper according to the text?

Representation of value, storing of information, packaging, personal use, art Signup and view all the answers