Jingteng Fanghua

Chapter 273 Science Is Rigorous
"Brothers, we live in a temporary workshop at night, each with a mosquito net, do you have any objections!" Liu Hua looked at everyone and asked.

"We came here to study, not to enjoy. Ms. Ruili also prepared a set of salutes for each of us. The conditions were already very good when we started our business!" Song Dajian said first.

The rest of the people echoed and shouted that they had no objection.

"I have already told Commander Lin that I live with you, and I can practice here when he is not busy." Gao Qi said.

"Then let's unload and salute first, and then report to Mr. Jack at the construction site office to receive our respective tasks." Liu Hua said.

"Go, unload and salute!" Li Shihong waved his hand and took the lead towards the van.

"Liu Hua, do you want to go to the farm today? Gao Jun and Li Hao are all looking forward to you! Because you have stated in your letter that they are not allowed to come over, they have kept their own. Gao Jun is too busy there, and Li Hao Hao has a job. I promise them that you will go to the factory to see them as soon as you come!" Tranquility said as she walked beside Liu Hua.

"These brothers of mine don't know anything about the farm, wait until I settle them down! In the evening, Sister Ray and I will go to see everyone."

"Alright then! I'll help you bastards make the beds first, hee hee." Tranquility laughed.

In the chief engineer's office, Liu Huagaoqi and others stood around Jack's large desk, their eyes fixed on the two small barrels of polyvinylpyrrolidone samples placed on the desk.

Jack pointed to the keg containing pure white solid powder and said: "This one is a product from the laboratory. It is pure white. Look at this keg again." Jack pointed to another keg: "This one contains It is an industrial product, it does not look as good and pure as the one produced in the laboratory, do you think it is slightly yellowish?"

Liu Hua put the two small buckets together, compared them carefully, nodded and said, "Mr. Jack, the white powder in this bucket is indeed a bit yellowish. If you don't compare them together, you won't find it at all."

"Students, the name of our product Liu Hua said that Chinese should be called polyvinylpyrrolidone. Its English name is Polyvinyl pyrrolidone, PVP for short. It is made of monomer NVP (N-vinylpyrrolidone) through homopolymerization, copolymerization, cross-polymerization A series of polymer fine chemical products with excellent performance obtained by co-polymerization and other methods.

However, due to some problems in the process, there has been no breakthrough, so the industrialized products cannot achieve the high-purity effect of the laboratory.This has always been a pity for the chemical experts who study PVP, but they have never given up on this breakthrough research.

PVP is non-toxic, non-irritating or allergic to the skin and eyes, and has no effect on the central nervous system, respiratory system, and blood circulation system.

Generally, PVP can be divided into three types: pharmaceutical grade or food grade, cosmetic grade and industrial grade. As a synthetic water-soluble polymer compound, PVP has the general properties of water-soluble polymer compounds.

PVP has excellent solubility, physiological compatibility, complexation, film-forming, bonding ability, water absorption and moisturizing properties, so it is widely used in biomedicine, medical and health care, cosmetics, daily chemicals, food and beverage, new materials, Pigments and coatings, textile industry, paper industry, oil extraction, photosensitive materials and electronics industry and other fields play a wide and important role.

In terms of medicine and health, PVP has excellent physiological inertia, does not participate in the metabolism of the human body, and has excellent biocompatibility, and does not cause any irritation to the skin, mucous membranes, eyes, etc.Pharmaceutical-grade PVP is one of the new pharmaceutical excipients advocated internationally.It can be used as a binder for tablets and granules, a co-solvent for injections, a glidant for capsules, etc.

In terms of food processing, PVP itself does not cause cancer, has good food safety, and can form complexes with specific polyphenolic compounds, making it clear and anticoagulant in juice drinks.

In terms of daily cosmetics, there is no danger of using it.

PVP is a product developed by the German BASF company in 1938, and then the M country GAF company also started production in 1956.China has also begun to study this technology, but it has not yet formed industrial production. "

Because Li Shihong's English listening ability in chemical engineering was not good enough, Liu Hua had no choice but to act as a temporary translator, translating Jack's words sentence by sentence for everyone to listen to.When the last sentence was translated, Liu Hua hesitated and translated it truthfully.

"Mr. Jack, China's PVP industrial production will come soon." Gao Qi said.

"I have no doubts about this. As far as Liu Hua's comprehension ability in chemical engineering is concerned, as well as your group of high-achieving students from the Department of Chemical Engineering of Tsinghua University, I don't think it will be far away. I am looking forward to it!" Jack said.

Of course Liu Hua could hear that what Jack said was polite, but only he knew what Jack was thinking.

Everyone approached one by one to compare the two products, then lay down on their noses and sniffed them, nodding their heads and discussing with each other.

Seeing that Liu Hua and the others looked very serious, Jack nodded with satisfaction and said, "You all did product experiments in the laboratory when you were in school, and many of the experimental processes were carried out within a specific range. The data in the laboratory and ours The theoretical data of is the closest, even negligible.

However, in actual industrial production, it is affected by temperature, pressure, raw material concentration, purity, and various unit operations, and the flow of materials cannot be well controlled, which makes the process in an abnormal state, etc. The products produced Often not up to the product standards from the laboratory.However, we strive to achieve the ultimate in every detail, so that our products can meet the use standards stipulated in the international industry as much as possible.

"At present, your work is arranged in this way. I urgently need some on-site construction drawings in the later stage. Ms. Ruili would rather wait for your arrival than me to call in technical personnel. She wants to give everyone a chance to practice, So you must cherish and take every job in your hands seriously.

Inside that cabinet are all individual engineering drawings designed by me. You help me draw them out, and prepare a project budget based on the material details I marked above, as a basis for our project construction.

This afternoon, everyone will familiarize themselves with the construction site first, and will start drawing the next step of construction drawings tomorrow, and then supervise the part of the infrastructure construction drawings made by themselves, and familiarize themselves with the technological conditions of the equipment installed by them.Strive for one-step installation.

We all know that chemical products are pipeline-type one-stop production lines, so its process conditions determine the quality of products.During the installation process of the equipment, the source of leaking, leaking, dripping and dripping is stopped at the standardization of installation.At that time, I will strictly check each one.

You are all chemical engineering students at Tsinghua University, the highest institution in China, and you understand the basic requirements of chemical production, so I won’t repeat them here.I just hope that everyone can take the work in their hands seriously. "

"Mr. Jack, we promise to complete the task! Please criticize and correct me a lot at work, we will humbly accept criticism!" Liu Hua solemnly expressed his position to Jack on behalf of everyone.

"If any of our classmates fails to meet Mr. Jack's requirements, you can just expel him. Science is rigorous, and there is no room for falsehood. We will not ask for favors from Miss Ruili! Don't worry!" Gao Qi followed Express everyone's point of view.

"Okay! We've made a deal!" Jack was relieved.

(End of this chapter)