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2 results about "Dicarbonate" patented technology
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In organic chemistry, a dicarbonate, also known as a pyrocarbonate, is a compound containing the divalent [−O−(C=O)−O−(C=O)−O−] or −C₂O₅− functional group, which consists of two carbonate groups sharing an oxygen atom. These compounds can be viewed as double esters of a hypothetical dicarbonic acid, H₂C₂O₅ or HO−(C=O)−O−(C=O)−OH. Two important examples are dimethyl dicarbonate H₃C−C₂O₅−CH₃ and di-tert-butyl dicarbonate (H₃C−)₃C−C₂O₅−C(−CH₃)₃.
A device for producing di-tert-butyl dicarbonate
The utility model provides a kind of di-tert-butyl dicarbonate production device, it is related to chemical production technical field, including base, the base includes slab, fixed hole is opened in the slab, fixed sleeve is fixed on the slab top surface, fixed hole is used to fix slab.The utility model will drive connecting plate to rotate from driving pulley rotation, first gear bar rotates around fixed shaft axis center, and will also autorotate under the action of fixed gear, autorotating first gear bar will drive second gear bar and support shell to rotate, in the above process, connecting plate will also drive support shell to rotate around fixed shaft axis center, further make support shell and barrel body autorotate while revolving, realize the mixing of material, the device can save stirring paddle, avoid the cleaning problem brought by paddle structure, barrel body is movably arranged in support shell, convenient to take out and clean, reduce material residue, simplify cleaning process.
Imidazoline surfactant, its preparation method and application
PendingCN122325393ASolve the core problem of being difficult to adapt to complex working conditionsimprove performanceDicarbonatePtru catalyst
This invention discloses an imidazoline-type surfactant, its preparation method, and its application, relating to the field of surfactant technology. A method for preparing an imidazoline-type surfactant includes the following steps: (1) adding hydroxyethyl ethylenediamine, di-tert-butyl dicarbonate, an organic base, and a solvent to a reaction vessel for reaction, followed by nitrogen purging and vacuum distillation; (2) adding an alkaline catalyst to the reaction vessel and introducing ethylene oxide, followed by vacuum distillation to obtain precursor A; (3) adding trifluoroacetic acid to precursor A for reaction, followed by vacuum distillation and adding an alkaline salt solution to adjust the pH of the system, adding fatty acids and an acidic catalyst to the reaction vessel, cooling and filtering after the reaction, thus obtaining the imidazoline-type surfactant. The method described in this invention can greatly reduce various side reactions caused by the direct alkyl hydroxyethyl imidazoline ethoxylation, thereby ensuring that the product retains its anti-corrosion properties while improving its water solubility.
Owner:GUANGZHOU FLOWERS SONG FINE CHEM CO LTD