Definition Carbon disulfide (CS₂), also known as carbon bisulfide, is a sulfur-containing organic compound composed of one carbon atom and two sulfur atoms. It is a colorless to pale yellow liquid with a characteristic odor and is widely used as…
Definition Isosorbide, chemically known as 1,4:3,6-Dianhydro-D-sorbitol, is a bio-based organic compound produced through the dehydration of sorbitol. It has a molecular weight of 146.14 and is characterized by a rigid bicyclic structure formed by two fused tetrahydrofuran rings. As a…
Definition Silane, also known as silicon hydride, refers to a family of compounds composed of silicon and hydrogen. Similar to hydrocarbons, silanes form a homologous series with the general formula SiₙH₂ₙ₊₂. The simplest and most important member of this family…
In melt crystallization, the disparity in results is often striking. Some materials achieve significant purity leaps after a single stage, while others show virtually no differentiation in assay levels between the product, mother liquor, and sweating liquor, even after completing…
Melt crystallization is not a universal solution for all chemical systems. While some materials exhibit significant purity gains after a single stage—with further improvements in subsequent stages—others may crystallize without effective mother liquor discharge or noticeable sweating, resulting in stagnant…
In lab-scale trials of melt crystallization, our primary objective is not achieving peak purity initially, but rather determining the technical viability of the material for further process development. When clients inquire whether a specific substance can be purified via melt…
Industry Challenge – Why Conventional Processes Are Expensive and Inefficient For decades, chemical production has followed a sequential “reaction first, separation later” configuration. Reactors complete conversion, while distillation columns handle purification. The result is a long process route with high…
Preface: Why “Catalyst Packing” Becomes the Make-or-Break Factor for Reactive Distillation Reactive distillation (RD) and catalytic distillation (CD) are representative process intensification technologies that synergistically integrate reaction and separation within a single column. On one hand, timely removal of products/by-products…
In typical reactions such as etherification, esterification, and hydrogenation, traditional processes usually face three common bottlenecks: (1) Due to balance constraints, the conversion rate cannot be further increased; (2) Strong heat release leads to hotspots and side reactions; (3) The…
On May 21, the 10th International Conference on Olefins and Polyolefins was successfully held in Ningbo. The conference brought together technical representatives from leading domestic and international organizations, including Wanhua Chemical, LyondellBasell, and Norner of Norway. Conference site DODGEN was…