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　　Pharmaceutical grade sodium benzoate Small make up to tell you The development of chemical industry

　　The ancient peoples life more depends on the direct use of natural substances, or something needed to extract. Due to the inherent properties of materials cant satisfy peoples needs, has produced a variety of processing technology, the natural substance into a new material that has a variety of performance, and gradually put into practice on the scale of industrial production. Every use chemical methods change material composition or structure, or synthesis of new materials, belong to chemical production technology, namely chemical process; The products known as chemical or chemicals. In this way, many natural materials are continuously created not to come out.

　　At first, the production of this kind of product is a manual workshop, later evolved into the factory, and gradually formed a certain production department, the chemical industry. With the development of productivity, some production departments, such as metallurgy, oil refining, paper making, leather, etc., have as an independent division from the chemical industry production department. When large-scale oil refining industry and petrochemical industry booming, based on chemistry, physics, mathematics and other engineering technology, study on common law of chemical production process, solve the scale and large scale in many engineering problems of discipline, chemical engineering has further improved. It increase the chemical industrial production to a new level, from the experience or half experience state into a new stage of theory and prediction, the chemical industry with the ability to create more mass production, add a lot of material wealth for human, accelerate the process of the development of human society.

　　In modern Chinese, the chemical industry, chemical engineering and chemical technology are referred to as chemicals, which they appear in different historical periods, each have different meanings, but close, mutual penetration. In peoples minds, the term "chemical" and habits have become synonymous with a general knowledge and career, it is in the national economy and has an important significance on engineering technology, has attracted extensive interest, attracts tens of thousands of people, sacrificed their lives for it. Here briefly from every aspect of human social life, to illustrate the chemical colorful content and its important contribution.