The book "Equalities of mass transfer in the theory of mass exchange" by B. M. Gremyachkina is an outstanding work that will become an indispensable source of knowledge for students, graduate students and specialists in the field of chemical technology, engineering and applied mathematics. In this work, the author deeply and thoroughly explores the complex aspects of mass transfer, which makes it relevant for both theorists and practitioners. In. M. Gremyachkin, known for his work in physical chemistry and mass transfer theory, offers the reader a unique view of equations describing mass transfer processes. In his book, he not only explains the basic principles and patterns, but also demonstrates how these equations are applied in real systems. Readers will be able to learn about different methods of solving transport equations, as well as how these solutions can be used to optimize processes in the chemical industry, ecology and other areas. The book will be of interest not only to students and teachers, but also to practicing engineers and researchers working in the development of new technologies and processes. If you are passionate about chemical technology, ecology or physical chemistry, then this work will become a real treasure for you. It will help you deepen your knowledge and broaden your horizons in understanding the complex processes occurring in nature and technology. The topics raised in the book cover a wide range of issues related to mass transfer, including diffusion, convection, and interaction between components in different environments. Gremyachkin emphasizes the importance of understanding these processes to develop effective technologies, such as wastewater treatment, the creation of new materials and the optimization of chemical reactions. Readers will be able to see how theoretical knowledge can be applied to practical problems, making the book especially valuable for those who seek to apply science in real life. The author's style is clear and accessible, which allows even complex concepts to be explained in simple and understandable language. Gremyachkin skillfully combines theoretical calculations with practical examples, which helps the reader to better assimilate the material. His previous works, such as "The Theory of Mass Exchange" and "Methods for calculating transfer processes", also earned recognition and became the main textbooks in their field. In this book, he continues to develop his ideas, offering new approaches and solutions. If you are looking for literature that will help you understand the complex processes of mass transfer and their application in various industries, the “mass transfer equations in the theory of mass exchange” will become your reliable assistant. This book will not only expand your knowledge, but also inspire new research and development. Do not miss the opportunity to immerse yourself in the world of science and technology, discovering the exciting aspects of mass exchange with the help of B. M. Gremyachkina .