5results about How to "The reaction method is simple" patented technology

The invention relates to a method for preparing 4, 4 '-diaminodiphenyl ether. According to the method, 4, 4 '-dinitrodiphenyl ether is used as an initial raw material, and 4, 4'-diaminodiphenyl ether is prepared through catalytic hydrogenation reduction of a supported catalyst; in the preparation of the catalyst, the dispersion degree of the metal active component on the carrier is improved by virtue of the membrane dispersion microreactor on the premise of not using a surfactant, the metal dosage is reduced, the supported structure is integrally formed, and continuous production of the catalyst precursor is realized. The preparation process provided by the invention is more green and efficient, is applied to hydrogenation reduction of 4, 4 '-dinitrodiphenyl ether under mild reaction conditions, shows excellent performance, and reduces the production cost.

The invention discloses a photo-initiation self-suspension proppant and a preparation method and application thereof.The method comprises the steps that firstly, acrylamide, ethylene monomers, sulfonic acid monomers, a cross-linking agent and a photoinitiator are added into water and stirred to be dissolved, the pH value of a system is adjusted to be 3-7, and modified liquid is prepared; the modification method provided by the invention is simple and reasonable in design, and the prepared quartz sand proppant has excellent suspension performance, can effectively reduce the oil and gas exploitation cost and improve the oil and gas yield, and meets the requirements of unconventional oil and gas reservoir exploitation.

The invention discloses a synthetic method of styrene oxide. According to the method, a heterogeneous catalysis process is adopted, styrene is used as a raw material, graphene and a metal oxide are used as precursors to load heteropoly acid as a catalyst, mixed phosphate is used as an auxiliary agent, and under the condition of an organic solvent, hydrogen peroxide is used as an oxidizing agent to directly oxidize and generate styrene oxide; and after the reaction is finished, cooling the reaction liquid, and recovering and recycling the solid catalyst in the reaction liquid by methods such as filtration or centrifugation. The composition of the composite catalyst is CoMnaMgbOc / GS-PW12; the value range of a is 0.5 to 2; the value range of b is 0.1 to 0.8; and c is the oxygen atom proportion required by the metal oxidation valence state. The reaction method is simple and low in cost, the reaction can be carried out under normal pressure, the catalyst is good in catalytic activity, long in service life, easy to recover, high in recovery rate, low in energy consumption and environmentally friendly, and the reaction yield reaches 90% or above.

The application is a synthesis method of allyl glycidyl ether. The method adopts a heterogeneous catalytic process, uses allyl ether as raw material, adds a catalyst and an additive, and directly oxidizes to generate allyl glycidyl ether under the condition of no solvent by using hydrogen peroxide as an oxidant. After the reaction is completed, the reaction liquid is cooled, the solid catalyst in the reaction liquid is recovered by filtration or centrifugation and the like, and is recycled. The reaction method is simple, the cost is low, the reaction can be carried out at normal pressure, the catalyst has good catalytic activity, a long service life, is easy to recover, has a high recovery rate, is low in energy consumption, is friendly to the environment, can be recycled, the yield is greater than 70%, and the selectivity is also greater than 70%.

The invention provides a preparation method of high-purity all-cis jasmone, and belongs to the technical field of organic chemistry. The preparation method comprises the following steps: reacting sodium with liquid ammonia to prepare sodium amide, adding a catalyst, stirring to react, reducing pressure to remove a solvent, adding 2-formylmethyl-3-methyl-cyclopentene-2-ketone and methylbenzene under the protection of inert gas and under the condition of ice-water bath, heating and stirring to react, cooling to room temperature, and performing reduced pressure distillation to collect a product, thereby obtaining the high-purity all-cis-jasmonone. According to the method disclosed by the invention, the activity and reaction selectivity of the catalyst are greatly improved, the cis-jasmonone is generated through the reaction, the yield is high, the selectivity is good, the preparation condition is mild, the reaction method is simple, and the product purity is high.