96results about How to "Good catalytic effect" patented technology

Catalytic preparation method of dicyclopentadiene dioxide by quaternary ammonium heteropoly phosphato tungstate

The invention discloses a catalytic preparation method of dicyclopentadiene dioxide by quaternary ammonium heteropoly phosphato tungstate, which is characterized by comprising the following steps: epoxidation reaction: adding the raw materials of dicyclopentadiene, solvent I and quaternary ammonium heteropoly phosphato tungstate in a reactor, heating the temperature to 30-80 DEG C, stirring and dropwise adding aqueous hydrogen peroxide solution, and reacting for 3-36h under the temperature of 30-80 DEG C after dropwise adding; post-treatment: cooling the reacted materials to room temperature, evaporating solvent I by reduced pressure distillation and separating and removing water to obtain the mixture of the product and the quaternary ammonium heteropoly phosphato tungstate catalyst, dissolving and filtering the mixture by ethyl acetate to obtain filter cake, namely the recovered quaternary ammonium heteropoly phosphato tungstate catalyst, recovering ethyl acetate by performing reduced pressure distillation on filtrate to obtain the crude product, performing recrystallization on the crude product by solvent II, and drying to obtain the product. The invention has the advantages of convenient operation, high safety, small pollution, simple post treatment, and high product yield and purity.

Preparation method of mesoporous carbon nitride loaded precious nano particle

The invention discloses a preparation method of a mesoporous carbon nitride loaded precious nano particle, which comprises the steps of: with mesoporous silica as a hard template, preparing a mesoporous nitrogen-doped carbon material by using a nano pouring method; then carrying out alkylation reaction by using halohydrocarbon to ensure that the nitrogen-doped carbon surface is subjected to quaternization; enabling an anion group with precious metals to replace a halide ion by means of an ion exchange method, binding on the surface of the material; and finally reducing metal ions by using a reducing agent, and preparing the mesoporous carbon nitride loaded precious nano particle. According to the method, a precious metal particle precursor and a mesoporous material are tightly combined by means of an ion bond, and the precious metal particle is well dispersed on the ordered mesoporous material to form a precious metal/nitrogen carbon compound material. The mesoporous carbon nitride loaded precious nano particle has the activity of the precious nano particle and is high in specific area and large in hole volume of a mesoporous molecular sieve. The mesoporous carbon nitride loaded precious nano particle has excellent catalysis activity and catalysis stability for cathode oxygen reduction of a fuel cell, and has a potential commercial application prospect.

Uses of ionic liquid as catalyst in preparation of liquid crystal polyester, and liquid crystal polyester preparation method

ActiveCN108276567AEfficient and directional catalyticGood catalytic effectIonAcylation
The invention discloses uses of an ionic liquid as a catalyst in preparation of liquid crystal polyesters, particularly performing of a polymerization monomer acylation reaction step and/or a meltingcondensation polymerization reaction step after acylation in liquid crystal polyester preparation reaction steps under the catalysis of an ionic liquid, wherein the ionic liquid is obtained by carrying out a reaction on a heterocyclic organic alkali compound containing two or more nitrogen atoms and an anionic functional compound, and the adding amount of the ionic liquid is 5-2000 ppm based on the total amount of all the added polymerization monomer. According to the present invention, the ionic liquid catalyst has advantages of efficient directional catalytic property, obvious catalytic effect and reduced side reaction of polymerization; the ionic liquid has advantages of excellent stability and long-lasting catalytic effect; the prepared ionic liquid can be directly added to the acylation and transesterification reaction system without purification, such that the operation is simple; and the liquid crystal polyester resin prepared under the catalysis of the ionic liquid catalyst hasexcellent tensile strength and excellent notched impact strength.

Method for preparing algae material fuel by catalytic liquefying method

The invention belongs to the technical field of comprehensive utilization of algae, relates to a method for preparing high-quality fuel by using the algae material through a catalytic liquefying method, and particularly relates to a method for preparing the fuel by using a metal-modified molecular sieve catalyst to catalyze and liquefy the algae material. The method comprises the following steps of: crushing and sieving cleaned and dried algae, mixing the algae material with the metal-modified molecular sieve catalyst and water, then obtaining a mixture, putting the mixture into a reaction kettle, heating the reaction kettle, reacting under the oxygen-free condition, naturally cooling the mixture after the reaction of the mixture is finished, then carrying out normal-pressure distilling treatment on a solid-liquid product, collecting fractions at the temperature of 60-500 DEG C, separating water in the fractions and obtaining combustible fuel. The method has the advantages that the catalytic effect and the deoxygenating effect are ideal, the fuel yield is high, the oxygen content is low, the corrosion of the basic catalyst to equipment is avoided, the preparation process is simple, the principle is reliable, the materials are easily obtained, the quality of a product is good, the economic benefit and the social effect are obvious and the environmentally-friendly effect is good.

Formula and preparation of biocatalyst for modification and improvement of petroleum fuel oil

The invention relates to a formulation for a biocatalyst for modifying and improving petroleum fuel oil and a production method thereof. The formulation comprises the main components: 1, vegetable fat; 2, methanol; 3, candida rugosa lipase; 4, candida lipase; 5, horse radish peroxidase; 6, hydrogen peroxidase; 7, polyethylene glycol 1,000 to 5,000 (PEG for short); and 8, single methoxy polyethylene glycol 5,000 to 10,000 (MPEG for short). The production method comprises the following production processes and usage amount of raw materials is as follows, according to 1,000 liters of biocatalyst product produced once for modifying and improving the petroleum fuel oil: 1, the first step: using 'biological generator' equipment to produce 'fatty acid methyl ester or ethyl ester'; 2, the second step: taking 10 to 12 grams of hydrogen peroxidase powder and 5 grams of single methoxy polyethylene glycol 5,000 powder, adding 10 milliliters of pure distilled water into the mixture for mixing and preparing; and keeping stand the mixture for 30 minutes; 3, the third step: taking 12 to 15 grams of horse radish peroxidase powder and 8 grams of the single methoxy polyethylene glycol 5,000 powder, adding 12 milliliters of pure distilled water into the mixture for mixing; and keeping stand the mixture for 30 minutes; 4, the fourth step: mixing hydrogen peroxidase preparation and horseradish peroxidase preparation in turn in an organic solution of fatty acid monoester, and keeping stand the mixture for 60 minutes; and 5, packaging the finished product by 200 liters per bucket for standby.

Silicon-aluminum molecular sieve, preparation method and applications thereof, and cyclic ketone conversion method

The invention provides a silicon-aluminum molecular sieve, a preparation method and applications thereof. The silicon-aluminum molecular sieve comprises an aluminum element, a silicon element, and an oxygen element. The pore volume of the silicon-aluminum molecular sieve is 0.3 cm3/g or more. The total specific surface area is 200 m2/g or more, the external surface area is 30 m2/g or more, and the external surface area accounts for 10 to 55% of the total specific surface area. The benzene absorption amount is at least 65 mg for each gram of molecular sieve under following conditions: temperature: 25 DEG C, P/P0=0.10, and absorption time: 1 hour. Under N2 static absorption tests, the micro pore size distribution is in a range of 0.9 to 2.0 nm. The invention provides a cyclic ketone conversion method. The provided molecular sieve containing precious metals has a special physico-chemical structure, the benzene absorption amount is high, and the micro pore size distribution is in a range of 0.9 to 2.0 nm. The molecular sieve can achieve a better catalytic effect, when being applied to reactions that generate circular molecules (especially cyclic ketone molecules) or reactions that circular molecules (especially cyclic ketone molecules) participate in.

Preparation method of Pt3Ni@PtNi2 core-shell structure nanowire

The invention relates to a preparation method of a Pt3Ni@PtNi2 core-shell structure nanowire. The method comprises the steps that platinum bis(acetylacetonate), nickel acetylacetonate, glucose and cetyltrimethylammonium chloride are added into 5 ml of oil-ammonia for dissolving, the solution is subjected to ultrasonic treatment in an ultrasonic machine to be mixed to be uniform, the mixed solution reacts in an oil bath at the temperature of 200-220 DEG C, an oil bath reaction product is cleaned, and the core-shell structure nanowire is obtained. According to the method, the defects that a traditional imine preparation method is tedious in step, the reaction condition is strict, and the large-scale production cost is high are overcome. According to the core-shell structure nanowire, the catalyst generation method is simple, the catalytic effect is god, and the selectivity is high. A catalytic reaction can be conducted at room temperature and completed at one step, the stability is good, the defects that traditional distillation, reflux and other methods have tedious steps and are high in cost are overcome, the synthesized catalyst can generate aminobenzene by conducting addition on nitrobenzene through hydrogen, the phenomenon that imine is subjected to hydrogenation to generate amine is not likely to occur, and the excellent selectivity of the catalyst on hydrogen addition is embodied.
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products