6 results about "Benzyl mercaptan" patented technology

The invention provides a production process of pyridaben, and belongs to the technical field of pesticides, and the production process comprises the following steps: adding a dichloropyridazinone-methanol solution and p-tert-butyl benzyl mercaptan into a condensation reaction kettle, dropwise adding an acid-binding agent, and carrying out a condensation reaction to obtain a pyridaben mixed solution; transferring the pyridaben mixed solution into a heating kettle, heating to completely dissolve the pyridaben, then carrying out filter pressing by a filter press into a crystallization kettle, carrying out cooling recrystallization, and then carrying out centrifugal separation and drying to obtain the pyridaben. According to the invention, pyridaben is produced by adopting a new process of directly heating, filtering and recrystallizing after condensation reaction, so that the use of high-toxicity and high-risk organic solvents such as methylbenzene in the recrystallization process is effectively avoided, the original production process is simplified, the product content is increased, the production cost is reduced, and the market demand can be fully met.

The application discloses a kind of water treatment composite filter membrane and preparation method thereof, belong to membrane separation technical field, a kind of water treatment composite filter membrane described in the application, including Ag-PAN base membrane and HOFs coating, the Ag-PAN base membrane is handled grafting with 4-vinyl benzyl mercaptan, HOFs coating is modified with 5-hexene-1 alcohol olefin.The application further provides a kind of preparation method of water treatment composite filter membrane: S1.AgNPs (silver nanoparticles) synthesis;S2.Ag-PAN base membrane is grafted after preparation;S3.HOFs crystal synthesis is modified with olefin;S4.Ag-PAN-HOFs composite filter membrane synthesis.The filter membrane prepared in the application has excellent antibacterial performance and self-repairing ability, stable structure, not easy to fall off in the water treatment process, is conducive to long-term stable use in the water treatment process.

The invention discloses a supramolecular polymer based on lipoic acid-based polydimethylsiloxane as well as an application and a degradation method of the supramolecular polymer. The supramolecular polymer is prepared by synthesizing an intermediate from lipoic acid and derivatives thereof and N, N '-succinimido carbonate, and then reacting with polydimethylsiloxane with different chain lengths and viscosities. The synthesis is simple, the raw material cost is low, and industrial production is easy. The polymer can be processed into different structures, is used as a dielectric layer of a capacitive sensor, and has good performance. Besides, the polymer can be degraded in a chloroform solution containing benzyl mercaptan and 1, 8-diazabicyclo [5.4. 0] undec-7-ene, and can be completely dissolved within 48 hours, so that the problems of complex synthesis, high cost and non-degradability of the existing material are solved.

This invention relates to a method for the electrocatalytic oxidation of anisole to anisole sulfoxide using iron-based complexes, belonging to the fields of homogeneous catalysts and electrocatalytic oxidation technology. The invention utilizes an iron-based complex formed by coordination between a tetraamide macrocyclic ligand (TAML-H4) and metallic iron as a homogeneous molecular catalyst, with water as the sole oxygen source, to construct an electrocatalytic anisole oxidation system. Through the synergistic effect of the catalyst and water, a proton-coupled electron transfer and single-electron oxidation process occurs at the anolyte, resulting in the loss of two electrons and two protons to generate a high-valence iron-oxygen active intermediate [Fe]. Ⅴ (O)(TAML)] – This invention achieves highly efficient and selective oxidation of anisole, generating the high-value-added product benzyl sulfoxide at the anode. It eliminates the need for additional strong oxidants, employs mild reaction conditions, boasts high atom economy, and is environmentally friendly, making it suitable for the green conversion of sulfides in the synthesis of fine chemicals. This provides a feasible pathway for the industrial production of sulfoxide compounds.

The invention relates to a preparation method of an interleukin-23 receptor peptide inhibitor and a chiral intermediate thereof, in particular to a method for preparing an L-penicillamine derivative, and the L-penicillamine derivative can be used for preparing the interleukin-23 receptor peptide inhibitor. On one hand, the invention relates to a method for preparing a compound shown as a formula I. The method comprises the following steps: brominating isobutyraldehyde, substituting bromine atoms on the isobutyraldehyde with benzyl mercaptan and the like, then converting aldehyde groups into nitrile ammonia by using sodium cyanide, and finally converting nitrile groups into carboxylic acid by using nitrilase, so as to obtain the benzyl and the like substituted L-penicillamine derivative. The invention also relates to a penicillamine derivative shown as a formula I-Fmoc obtained by protecting free amino groups on the L-penicillamine derivative with Fmoc, and a polypeptide which is prepared from the penicillamine derivative shown as the formula I-Fmoc and has a general name of Icotrokinra. Some steps of the method have the characteristics of high purity and high yield.

The invention relates to printing ink and a preparation method thereof, and belongs to the technical field of printing ink. The printing ink is prepared from waterborne polyurethane, a pigment, an auxiliary agent and deionized water, the preparation method of the printing ink comprises the following steps: mixing the waterborne polyurethane, the pigment, the auxiliary agent and the deionized water, and grinding to obtain the printing ink. When the waterborne polyurethane is prepared, polycaprolactone glycol and isophorone diisocyanate are used as initial raw materials, preferably, 2, 2-dimethylolpropionic acid is used as a hydrophilic monomer, 1, 4-butanediol and a modified composite diol monomer are used as chain extenders, and triethylamine is used as a neutralizer; the modified composite diol monomer is a mixture obtained by co-modifying trimethylolpropane monooleate through a composite sulfydryl compound, and the composite sulfydryl compound comprises cyclohexyl mercaptan, mercaptoethylamine and benzyl mercaptan; the printing ink can be well attached to the surfaces of non-polar plastics such as PP, is high in adhesive force and excellent in adhesive property, and improves the printing effect.