Postgraduate studies in chemical engineering

Chemical processes refer to chemical engineering technologies or chemical production techniques, namely the methods and processes by which raw materials are transformed into products through chemical reactions, including all measures taken to achieve this transformation. The chemical production process can generally be summarized into three main steps: ① Raw material processing. To bring the raw materials to the conditions and specifications required for chemical reactions, different raw materials need to undergo various preprocessing methods such as purification, concentration, mixing, emulsification, or crushing (for solid raw materials), depending on the specific circumstances. ②Chemical reactions. This is a key step in production. The pre-treated raw materials are reacted under certain conditions of temperature, pressure, etc., to achieve the desired reaction conversion rate and yield. The types of reactions are diverse, and can include oxidation, reduction, double displacement, sulfonation, isomerization, polymerization, calcination, etc. The target product or its mixture is obtained through chemical reactions. ③Product refinement. The mixture obtained through chemical reactions is separated to remove by-products or impurities, in order to obtain a product that meets the specified composition requirements. Each of the above steps requires that the desired chemical and physical transformations be carried out in specific equipment under certain operating conditions. Chemical production technologies are typically developed for specific products or raw materials, such as the production of vinyl chloride, the synthesis of methanol, the production of sulfuric acid, and gasification. Therefore, it has the particularity of individual production ； However, the aspects covered by its content generally include: the selection of raw materials and production methods, process organization, the functions of the equipment used (reactors, separators, heat exchangers, etc.), structure and operation, the influence of catalysts and other materials, the determination of operating conditions, production control, product specifications as well as the separation and utilization of by-products, along with issues such as safety technology and technical economics. The realization of modernized industrial production relies on fundamental scientific theories (such as chemistry and physics), chemical engineering along with its principles and methods, as well as knowledge and technologies from other related engineering disciplines. The main trends in the modernization of student production technologies include: the enlargement of scale in basic chemical industry production, full utilization of raw materials and by-products, adoption of new raw material routes and new catalysts (including new reactions), reduction of energy consumption, prevention of environmental pollution, automation of production control, and optimization of production. Early chemical production was based on experience and could be described as artisanal. Over the long course of production and scientific development, chemical manufacturing has gradually shifted from artisanal production methods to modern production techniques based on scientific theories. However, due to the complexity and variety of substance transformations in chemical production, empirical production techniques still exist. From the above development, the term \"chemical process\" is only appropriate for chemical production that is still primarily based on experience. In the curriculum of higher education institutions, there are Industrial Chemistry and Chemical Engineering; these two courses differ only in name, and their contents are generally similar to those of the general topics in chemical production technology mentioned above. Chemical engineering is an engineering discipline that studies the common principles of chemical and physical processes involved in production within the chemical industry and other process industries. These industries include the petroleum refining industry, metallurgy industry, building materials industry, food industry, papermaking industry, and others. Starting from basic raw materials such as oil, coal, natural gas, salt, limestone, other ores, as well as food, wood, water, and air, chemical or physical processes are used to alter the composition, properties, and state of these materials, thereby producing a variety of high-value products such as fertilizers, gasoline, lubricants, synthetic fibers, synthetic rubber, plastics, caustic soda, soda ash, cement, glass, steel, iron, aluminum, pulp, and so on. A chemical process refers to a reaction process in which substances undergo chemical changes; for example, the catalytic cracking of diesel to produce high-octane gasoline is a chemical reaction process. Physical processes refer to changes in the composition, properties, state, and energy of matter that occur without chemical reactions; for example, crude oil is separated through distillation to produce products such as gasoline, diesel, and kerosene. As for other fields such as ore smelting, fuel combustion, biological fermentation, leather manufacturing, seawater desalination, etc., although the forms of these processes vary, they can all be broken down into the aforementioned chemical and physical processes. In fact, chemical processes often occur simultaneously with physical processes. For example, catalytic cracking is a typical chemical process, but it is accompanied by heating, cooling, and separation; moreover, during the reaction, flow, heat transfer, and mass transfer also occur. All these processes can be studied through chemical engineering, so that their patterns can be understood and explained; they can then be applied to the development, design, and operation of production processes and equipment in order to optimize them and improve efficiency. A common feature of the above industrial productions is that, from the laboratory stage to industrial production, especially on a large scale, the issue of scaling up the equipment must be addressed. An important way to increase production scale and improve economic efficiency is the scaling up of facilities, in order to save on investment, reduce consumption, minimize land use, and cut labor costs.

It’s neither good nor bad. It depends on personal interests and development.

Actually, the major itself isn’t that important; it depends on the school you apply to. At my school, each major has different specializations, and yet for some majors, the tasks involved are exactly the same. The key to pursuing a master’s degree lies in the professors at the school and the research areas they specialize in

These majors are neither good nor bad; they represent a combination of the two. In some schools, all these majors are available, or two of them at least, but different majors may not be separated at all; the courses are the same, and the same instructor teaches students in the same major – this situation also occurs. The key is to know what one is interested in researching, and when applying, to find out what exactly the research interests of the professors at the school are. I think one should choose a research direction and supervisor based on personal interests and strengths, and select a major based on the supervisor. . . .

I recommend that you take the advanced exam; Dalian University of Technology is very strong in this area

Suggested order: Chemical Engineering, Chemical Technology, Refining. During graduate studies in engineering, one usually does more simulation and calculation work; the tasks carried out are quite similar to those in actual work later on. In the fields of process development and optimization, experiments are required, and such work may involve significant toxicity and hazards. If one does not work in a research institution or in R&D, then working with experiments is still less preferable than doing calculations. From personal experience, I really understand it well.

I believe the differences between the majors are not significant, but I recommend choosing chemical engineering as it offers a wider range of options.

The key is to consider what the supervisor you are applying to does; these days, supervisors will do anything as long as it generates money, so there’s no need to be too specific regarding the field of specialization.

I think the three are more or less similar; it mainly depends on what you prefer. Everyone has their own opinions about which one is best. As long as you study hard, all three are good research directions :)

Teachers are the most important; money comes first!

I agree with what was said on floor 5; I suggest you not even consider it – it’s completely pointless! ! ! Just check if the best mentors you can reach have any good projects available – that’s enough! Even if you have decided on a major and found a school and a teacher. You should know that all the well-known mentors and those with good projects have already been chosen by our university’s undergraduates. Even if you go, you can only get an ordinary one at best; after that, it depends on luck.

Well, I agree to some extent; actually, you yourself don’t know what you’re going to do in the future.