Reaction calorimeter

Those made in China also have good performance and are inexpensive

Mettler models require an additional chiller; they are considered the best among reaction calorimeters. The basic configuration for a 1L reactor (equipped with 2 pumps for feeding materials) costs less than 200 watts. Newer models were released at the end of 2007. If the price seems too high, you might consider HEL’s reaction calorimeters – Tianjin University seems to have them, and they are relatively inexpensive, around 40–50 watts. I haven’t used it, so I can’t give an evaluation. There are chemical process safety conferences held every year; this is the third one, organized by METTLER and taking place in April. What is LZ mainly used for with a reaction calorimeter? Safe? Process optimization? . . . .

Reply to 2# shihejun: Could you introduce the situation of other instruments in China? Scope of application, price, users, and other details. Thank you!

Reply to 3# 1900413: Regarding chemical safety, applications in process optimization are also considered. Do you know about other users’ situations? Please give an introduction! Thank you

The last edit to this post was made by 1900413 on 2010-6-3 at 10:37; reply to 5# hgsafety: In terms of process safety, one instrument alone cannot solve all problems. Reaction calorimeters are primarily designed for normal reactions, and can provide data such as reaction heat, adiabatic temperature rise, MTSR, and induction time. Notable examples include METTLER’s RC1 and HEL’s Simular. However, when considering safety aspects, uncontrolled reactions also need to be taken into account; in such cases, adiabatic calorimeters are required, which can simply be made using a Dewar flask. Well-known models in this category are HEL’s PHI-TEC II and THT’s ARC. Calorimetry under adiabatic conditions simply involves maintaining a certain temperature to determine whether a substance decomposes; this allows measurement of the heat released during decomposition, as well as the rate of temperature increase and pressure rise. Adiabatic calorimeters can provide pressure data, but the testing speed is relatively slow – it takes about 1-2 days per sample. At this point, one can consider using DSC/DTA, RSD, TSU, etc. These instruments can provide a preliminary assessment of a substance’s stability, but some of them cannot supply pressure information. Just a few milligrams are sufficient; the process can be completed in half an hour, from room temperature to 500°C. Additionally, flash point, deflagration, and detonation can also be measured. . . In short, if safety is to be ensured, it is first necessary to have an overall understanding of safety assessments; these instruments merely assist in obtaining the desired data. Professor Chen Wanghua from Nanjing University of Science and Technology does excellent work in the area of process safety; he seems to have published a book recently that could serve as a reference

Flash point and DCS/DTA are already available; what are RSD and TSU? I’ve read Teacher Chen’s books; they are indeed good. I’ve also referred to the graduate theses he supervised, those on nitration – they are all of high quality. It seems you are an expert in this area; please give me some advice if I encounter any problems. Have you attended Mettler’s process safety conference? Could you talk about the achievements?

I’m not an expert; I graduated just a few years ago. I haven’t attended any safety meetings, but I have read the materials related to them. “What achievements.” . . Personally, I think it’s other companies that have promoted TSU; I haven’t used it and am not familiar with it. RSD is from British THT; its full name is “Rapid Screening Device,” and it can provide heat and pressure information. You can contact me via in-app messages later

I’m not sure if the original poster is still on the forum. I’ve encountered the same issue that the poster was concerned about; I wonder if the original poster has managed to solve it, and if there’s any information they can share