7 results about "DIMETHYL SEBACATE" patented technology

The invention discloses an anode material for adipic acid monoester electrolysis and a preparation method of the anode material, the electrode solves the key problems that a platinum layer is easy to fall off, the catalytic activity is low, the organic matter poisoning resistance is poor and the like of a traditional titanium platinum-plated electrode through multi-scale interface strengthening and nano structure regulation and control; the preparation method comprises the following core steps: constructing a porous ZrO2-TiO2 composite oxide layer on the surface of a titanium substrate by adopting a micro-arc oxidation-hydrothermal composite process, and generating platinum nanoparticles in situ to pre-fill pores, so that the anchoring effect of a platinum layer is remarkably enhanced; depositing a platinum / carbon nano tube (Pt / CNT) composite catalyst layer on the surface of the oxide layer through a pulse-ultrasonic synergistic electroplating technology, wherein the carbon nano tube is used as a conductive framework to inhibit platinum agglomeration; through vacuum annealing and electrochemical activation treatment, the interface bonding force and active site exposure are further optimized; the electrode shows excellent performance in an adipic acid monoester electrolysis system, and efficient electrocatalytic conversion from adipic acid monomethyl ester to dimethyl sebacate is achieved.

The application discloses a device and method for treating dimethyl sebacate electrolysis reaction products. Some by-products exist in the product of the dimethyl sebacate electrolysis reaction product after water is added to remove the solvent, the method is to add an extractant and an auxiliary agent to the reaction product and to mix and disperse through a pipeline built-in component, through the treatment, dimethyl adipate and methyl hexahydroxyhexanoate are transferred to an organic phase, and the inorganic phase is treated to meet the reuse requirements. The effect of the application is that by introducing the extractant and the auxiliary agent, the reaction product is treated by using the high-efficiency dispersion mixing structure, the process is simple, and the energy consumption is low. By using the method, the product yield can be improved, the process is simplified, the system inventory is reduced, and the method can be applied to industrial application.

The invention relates to the technical field of chemical engineering and polymer auxiliaries, and particularly discloses an efficient purification method of bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, when tetramethylpiperidinol and dimethyl sebacate are used for synthesizing bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, the residual tetramethylpiperidinol in the reaction is converted into the bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, and the bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate is obtained through the high-efficiency purification method of the bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate. In the conventional water washing link, water washing removal is difficult, a large amount of waste water is generated, and amine-containing compounds and catalyst impurities easily cause oxidation yellowing and discoloration of the product; the washing purification step is optimized and improved, and the purposes of improving the washing efficiency, reducing the chromaticity of the product and not influencing the anti-aging application effect are achieved in the modes of removing chromophoric groups through acid washing, carrying out oxidation pretreatment and protecting hindered amine functional groups through alkali washing; in the whole process, water washing can be reduced from conventional 5-7 times to 2 times, so that the water washing efficiency is improved, and the excellent chromaticity index of the product is ensured; the method is high in practical operability, and industrial production can be stably operated.

The application provides an electrode material for paired synthesis of dimethyl carbonate and dimethyl sebacate and a preparation method and application thereof. The electrode material is a composite material formed by titanium metal with a CoO / CeO2 coating and a hydrophobic mesh layer wrapped outside the titanium metal, wherein the hydrophobic mesh layer is a titanium mesh with a zirconium and tin doped titanium dioxide film layer on the surface. When the electrode material is used for a cathode for paired synthesis of dimethyl carbonate and dimethyl sebacate, and a carbon dioxide is added in an electrolytic system and an electrolytic reaction is carried out after the electrolytic system is heated and pressurized to a supercritical state of the carbon dioxide, problems such as generation of hydroxyl ions by hydrogen evolution at a cathode in a traditional synthesis process, formation of a strong alkaline environment, decomposition of part of the product dimethyl sebacate, reduction of reaction selectivity and yield and the like can be effectively solved, carbon dioxide is by-produced, and the electrode material has a good industrialization prospect.

The present invention provides a synthesis method for preparing 706 polymerization inhibitor by using a macroporous sulfonic acid resin catalyst supported on metallic aluminum, comprising the following steps: soaking the macroporous sulfonic acid resin in an aqueous ammonia solution with four times the volume and stirring, then filtering and drying the mixture to obtain an ammoniated sample; putting an aluminum salt into deionized water and stirring to obtain salt solutions with different molar concentrations, dropping the prepared aluminum salt solution onto the ammoniated sample to completely wet the ammoniated sample, and drying to obtain a macroporous sulfonic acid resin catalyst supported on metallic aluminum; then sequentially adding 2,2,6,6-tetramethyl-4-hydroxypiperidine nitroxide and dimethyl sebacate into a reaction kettle, adding the macroporous sulfonic acid resin catalyst supported on metallic aluminum for reaction to obtain the product 706 polymerization inhibitor; the synthesis method of the macroporous sulfonic acid resin catalyst supported on metallic aluminum synthesized by the present invention is simple, has high catalytic reaction activity, and has high reaction selectivity in the synthesis of 706 polymerization inhibitor.

The present invention discloses a method for producing dimethyl sebacate by electrooxidation of monomethyl adipate. In a diaphragm electrolyzer, while the electrochemical conversion of monomethyl adipate to dimethyl sebacate is achieved at the anode, the efficient production of high-purity hydrogen at the cathode is achieved through the design of high-performance cathode catalysts and electrodes. The method adopts an active cathode with a low hydrogen evolution overpotential and a dimensionally stable anode with high catalytic activity, and utilizes a constant current electrolysis strategy to improve the selective electrocatalytic oxidation performance of monomethyl adipate and achieve efficient electrocatalytic conversion of monomethyl adipate to dimethyl sebacate. At the same time, the cathode hydrogen evolution overpotential and the cell voltage are greatly reduced. Compared with traditional electrosynthesis processes, the current efficiency is greatly improved, the energy consumption is reduced, and the method has good industrialization prospects.