Process for preparing dicyclic pentylene modified unsaturated polyester resin

The preparation process includes four steps: addition reaction of dicyclic pentylene, esterification of binary acid and dihydric alcohol, condensation, and dilution by adding vinyl cross linking monomer. The said method has low requirement of dicyclic pentylene, low production cost, and stable technological conditions; and the modified unsaturated polyester resin has low viscosity, high solid content, low shrinkage, and good heat, water and chemical corrosion resisting property, so that it has wide use.

Method for improving yield of hexabenzyl hexaazaisowurtzitane product by using acidic ionic liquid catalyst

The invention discloses a method for improving the yield of a hexabenzyl hexaazaisowurtzitane product by adopting an acidic ionic liquid catalyst, which comprises the following steps: by taking an acidic ionic liquid as a catalyst, taking benzylamine and a glyoxal aqueous solvent as raw materials, and changing the variety and adding mode of the catalyst, synthesizing the hexabenzyl hexaazaisowurtzitane product. And synthesizing the hexabenzyl hexaazaisowurtzitane under the condition of room temperature. The method has the remarkable characteristics that the process reaction conditions are simple and easy to implement, the catalytic efficiency is high, the catalyst is easy to recover and can be recycled, and the target product hexabenzyl hexaazaisowurtzitane is high in yield, high in purity and the like. The method mainly solves the problems of low catalytic efficiency, low target product yield, incapability of recycling a catalyst, 'three wastes' pollution caused by post-treatment of inorganic ...

Polyethylene composition and application thereof

The invention discloses a polyethylene composition and application thereof. The composition is composed of 100 parts of polyethylene, 0.01-3.0 parts of an anti-aging agent, 0.05-5 parts of organic peroxide, 0-5 parts of an auxiliary agent A and 0-5 parts of an auxiliary agent B. The invention further discloses a preparation method of the composition. Wherein the polyethylene can be low density polyethylene (LDPE) or a mixture of LDPE and an ethylene-a olefin copolymer. The anti-aging agent is one or a mixture of several of a hindered phenol antioxidant, an amine antioxidant and a phosphite ester antioxidant. The auxiliary agent A is an organic compound containing an amide structure and can be a compound as shown in a structural formula 1, and the compound can be a linear compound or a cyclic compound. And the auxiliary agent B is an organic compound containing conjugated double bonds, and can be a compound as shown in a structural formula 2 or a polymer thereof.

Method for synthesizing TAIW through continuous hydrodebenzylation based on microchannel reactor

The invention discloses a method for synthesizing TAIW through continuous hydrogenation debenzylation based on a micro-channel reactor, which comprises the following steps: dissolving TADBIW in an organic solvent to prepare a solution with a certain concentration, and fully mixing the solution with hydrogen in a micro-mixer to obtain a gas-liquid mixed fluid; the gas-liquid mixed fluid is subjected to a continuous hydrogenation debenzylation reaction through a microchannel reactor filled with a solid catalyst, and the reacted gas-liquid mixture is subjected to gas-liquid separation and purification to obtain the target product TAIW. The method utilizes the microreactor for mixing, is high in efficiency and good in mass and heat transfer performance, prolongs the service life of the catalyst and is good in process essential safety; meanwhile, the serious defects of the hydrodebenzylation reaction in a kettle batch intermittent synthesis process are effectively overcome, the production efficiency ...

Process for preparing bicyclic pentylene modified unsaturated polyester resin

Palladium carbon catalyst regeneration and activation method for removing N-benzyl based on hydrogenation of N-heterocyclic alkane compound

The invention discloses a palladium-carbon catalyst regeneration and activation method for removing N-benzyl based on hydrogenation of an N-heterocyclic alkane compound, which comprises the following steps: removing impurities on the upper surface and in pores of a palladium/carbon catalyst through solvent cleaning, supercritical CO2 extraction, hydrogen peroxide oxidation and other treatments; then, a certain amount of palladium hydroxide is loaded again through methods such as precursor palladium chloride dipping and alkali liquor precipitation, so that the performance of the regenerated and activated palladium/carbon catalyst can basically reach 93% or above of the performance of the original catalyst, efficient recycling of precious metal is guaranteed, and the method has long-term significance for reducing the industrial cost of high-energy material synthesis.