《化工原理》（上、下册，英文版）是根据教育部制定的《普通高等学校本科专业类教学质量国家标准》中化工类专业知识体系和服务国际化教学需求而编写的英语教材。本书借鉴了美国Warren L.McCabe、Julian C.Smith和Peter Harriott主编的Unit Operations of Chemical Engineering教材，并结合我国高等化工教育的实际和特色，以工程应用为背景，强调理论联系实际，注重培养学生的知识运用能力和工程观点。
本书以物料衡算、能量衡算、物系平衡和过程速率4个基本概念为基础，介绍了主要化工单元操作基本原理、“三传”过程、计算方法及典型单元设备。全书分上、下两册，上册包括：Introduction、Fluid Flow、Fluid Transportation Machinery、Heterogeneous Separation、Heat Transfer and Heat Exchange Equipment、Evaporation和Appendix；下册包括：Introduction to Mass Transfer Processes、Gas Absorption、Distillation、Liquid-liquid Extraction、Drying和Other Types of Mass Transfer Separation Processes。本书配有名词术语和难句的诵读，读者可扫描封底二维码获取音频。
本书可作为高等学校化工原理英语课程的教材，也可供来华留学生和有意出国深造的学生学习使用。

Chapter 1 Introduction to Mass Transfer Processes
1.1 Mass Transfer Processes
1.1.1 Mass Transfer and Other Separation Methods
1.1.2 Representation of Phase Compositions
1.2 Mass Transfer Theories
1.2.1 Molecular Diffusion
1.2.2 Mass Transfer in a Single Phase
1.2.3 Mass Transfer between Phases
Words and Expressions
Notes
Calculation Exercises
Short Assay Exercises
Chapter 2 Gas Absorption
2.1 Introduction
2.1.1 Gas Absorption Processes
2.1.2 Absorbent Selection
2.1.3 Classification of Gas Absorption
2.2 Gas-liquid Equilibrium of Absorption
2.2.1 Solubility of Gas in Liquid
2.2.2 Henry's Law
2.2.3 Application of Phase Equilibrium Relation in Absorption Processes
2.3 Absorption Rate Equations
2.3.1 Film Absorption Rate Equations
2.3.2 Overall Absorption Rate Equations
2.3.3 Application Specifications of Absorption Rate Equations
2.4 Design Calculations for Absorption (or Desorption) Columns
2.4.1 Material Balance and Operating Line Equations
2.4.2 Determination of Absorbent Dosage
2.4.3 Calculation of Columns' Required Diameter
2.4.4 Calculation of Packed Layer Height
2.5 Absorption Coefficients
2.5.1 Determination of Absorption Coefficients
2.5.2 Empirical Equations for Absorption Coefficients
2.5.3 Characteristic Number Correlation Equations of Absorption Coefficients
2.6 Desorption and Other Absorption Processes
2.6.1 Desorption or Stripping
2.6.2 Absorption from Rich Gases
2.6.3 Absorption with Chemical Reactions
2.7 Packed Columns
2.7.1 Characteristic Parameters and Types of Packings
2.7.2 Hydrodynamic Properties of Packed Columns
Words and Expressions
Notes
Calculation Exercises
Short Assay Exercises
Chapter 3 Distillation
3.1 Introduction
3.2 Vapor-liquid Equilibrium of Binary Solutions
3.2.1 Raoult's Law for Ideal Solutions
3.2.2 Relative Volatility of Vapor-liquid Systems
3.2.3 Vapor-liquid Equilibrium Phase Diagrams of Ideal Binary Systems
3.2.4 Vapor-liquid Equilibrium Phase Diagrams of Non-ideal Binary Systems
3.3 Flash Distillation and Simple Distillation
3.3.1 Flash Distillation
3.3.2 Principles and Calculations of Simple Distillation
3.4 Principles and Processes of Continuous Distillation
3.4.1 Principles of Distillation
3.4.2 Distillation Columns and Operating Processes of Distillation
3.5 Design of Continuous Distillation Columns for Binary Mixtures
3.5.1 Concept of Ideal Plates and Hypothesis of Constant Molar Flow
3.5.2 Material Balance and Operating Line Equations
3.5.3 Effects of Feed Conditions and q Line
3.5.4 The Number of Ideal Plates
3.5.5 Special Cases for Calculation of Ideal Plates
3.5.6 Selection and Influence of the Reflux Ratio
3.5.7 Short-cut Method for Calculation of the Number of Ideal Plates
3.5.8 Plate Efficiency and Actual Plates
3.5.9 Process Calculations of Reboilers and Condensers
3.5.10 Operation Analysis of Distillation Columns
3.6 Batch Distillation for Binary Mixtures
3.6.1 Processes and Characteristics of Batch Distillation
3.6.2 Calculation of Batch Distillation with Overhead Distillate at Constant Composition
3.6.3 Calculation of Batch Distillation with Constant Reflux Ratio
3.7 Special Distillation
3.7.1 Azeotropic Distillation
3.7.2 Extractive Distillation
3.7.3 Molten Salt Distillation and Salt Extraction Distillation
3.8 Plate Columns
3.8.1 Plate Column Equipment
3.8.2 Plate Types and Fluid Flow Phenomena on Plates
Words and Expressions
Notes
Calculation Exercises
Short Assay Exercises
Chapter 4 Liquid-liquid Extraction
4.1 Phase Equilibrium
4.1.1 Liquid-liquid Equilibrium
4.1.2 Effects of Temperature on Phase Equilibrium
4.1.3 Representat