30 results about "Superbase" patented technology

The invention discloses a preparation method of mild reaction type aldehyde ketone resin. The mild reaction type aldehyde ketone resin is prepared by adding a quantitative superbase catalyst into mixed liquid of aldehyde and ketone compounds under the condition of stirring at normal temperature, wherein the reaction process is mild and stable, so the defect that the traditional furfuraldehyde acetone system is easy to implode is overcome. The invention also discloses an application of the mild reaction type aldehyde ketone resin to preparation of an aldehyde ketone resin modified epoxy grouting material. The prepared grouting material can completely exert the flexibility of the aldehyde ketone resin, solves the problem that epoxy resin has high brittleness, can further improve excellent mechanical properties, adhesive property, ageing resistance and corrosion resistance of the epoxy resin, and also has the characteristics of low toxicity, environmental friendliness and the like. In addition, according to the preparation method, the aldehyde ketone resin is prepared in advance and has higher viscosity and thixotropism when being used together with fillers, so the construction process is simple and the aldehyde ketone resin can be applied to concrete surface corrosion of basic facilities such as bridges and ports, restoration of cultural relic, water and seepage prevention, reinforcement and strengthening of buildings and the like.

The invention relates to a process for preparing solid strong base and superbase catalysts, and belongs to the field of catalysts. The process is characterized by comprising the following steps: (1) adding a particle type carrier containing active hydroxy in a reaction kettle; (2) in vacuum condition, stirring and heating to a temperature of between 80 and 200 DEG C, and removing adsorbed water on the surface of the carrier; (3) raising the temperature to between 200 and 300 DEG C, and adding NaOH or KOH with equivalent mol number to that of the hydroxyl on the surface of the carrier to dehydrate in pressure reduction condition; and (4) preserving heat at a temperature of between 200 and 300 DEG C, and preparing the solid strong base catalyst when no water is generated. The super strong catalysts prepared by the method have high catalytic activity on various organic chemical reactions, can be used for ester exchange reaction, ester condensation reaction, aldol condensation reaction, alkylations of acyl compounds, double bond isomerization of alkene, double bond transfer of unsaturated compounds containing heteroatom, branch alkylation of alkylbenzene, partial hydrogenization of conjugated dienes, amine adding catalytical reaction and the like, and has the advantages of recycling and reuse, simple operation, no environmental pollution and the like.

According to some aspects, the present disclosure pertains to methods of forming dimethyl 5-tert-butylisophthalate which comprise comprising converting 5-tert-butylisophthalic acid into dimethyl 5-tert-butylisophthalate in synthesis procedures that comprises methanol and a dehydrating agent as chemical reagents. In other aspects, the present disclosure pertains to methods of forming 5-tert-butyl-1,3-bis(1-methoxy-1-methylethyl)benzene that comprise deprotonating 5-tert-butyl-1,3-bis(1-hydroxy-1-methylethyl)benzene with a Brønsted-Lowry superbase and methylating the deprotonated 5-tert-butyl-1,3-bis(1-hydroxy-1-methylethyl)benzene to form the 5-tert-butyl-1,3-bis(1-methoxy-1-methylethyl)benzene.

A mass spectrometer is disclosed wherein highly charged fragment ions resulting from Electron Transfer Dissociation fragmentation of parent ions are reduced in charge state within a Proton Transfer Reaction cell by reacting the fragment ions with a neutral superbase reagent gas such as Octahydropyrimidolazepine.

The invention discloses a method for preparing fatty acid amide dimethyl tertiary amine compounds from solid superbase, and belongs to the field of organic chemical synthesis. According to the method,one or several kinds of fatty acids and N,N-dimethylamino compounds are used as raw materials; solid superbase with the advantages of high catalysis activity, cyclic use and environment-friendly effect is used as a catalyst for preparing the fatty acid amide dimethyl tertiary amine compounds. The method has the advantages that the operation is simple and convenient; the post treatment is simple;the reaction conditions are mild; the yield is high; the method belongs to a green novel method for synthesizing the fatty acid amide dimethyl tertiary amine compounds.

The invention relates to a synthetic method of 2,3-pentanedione. The synthetic method of the 2,3-pentanedione comprises the following steps: mixing a lactic acid solution with a solid alkali catalystM/N and carrying out catalytic reaction for 2-10 hours at the temperature being 100-400 DEG C to obtain 2,3-pentanedione. M is an active load and is any one of K2CO3, KHCO3, KNO3, KPO4 and KF, N is acarrier and is any one of Al2O3, a zeolite molecular sieve and ZrO2, and the mole ratio of the active load to the carrier is 1: (0.1-10); and the mass ratio of the solid alkali catalyst M/N to lacticacid is 1: (5-100). Load type superbase is a catalyst, the 2,3-pentanedione is synthesized by catalyzing the lactic acid, the selectivity and the conversion ratio can be high, and the yield of directly synthesized 2,3-pentanedione reaches 60-80%.

The invention discloses a method for removing chlorobenzene from underground water through nanosolid superbase-activated sodium persulfate. The method concretely comprises the following steps: feeding a nanosolid superbase activator and sodium persulfate into chlorobenzene-polluted underground water so as to conduct oxidization reaction, thus realizing the restoration of the chlorobenzene-polluted underground water. The prepared nanoscale solid superbase can enable aquifer media to fast, effectively and uniformly to achieve a strong basic environment, so that not only can the basic activation condition be continuously maintained, but also sulfate free radical (SO4<->) and hydroxyl free radical (OH) which have strong oxidative activity can be achieved through base-activated sodium persulfate so as to reach the obvious oxidization treatment effect on the chlorobenzene in the underground water, and the oxidization products have no secondary pollution on the underground water. The nanosolid superbase activator not only is low in the cost of raw materials, and environment-friendly, but also is simple and convenient in manufacturing process.

The various embodiments of the present invention relate to condensation curable silicone compositions comprising: a condensation curable polyorganosiloxane; and treated particles comprising a particulate solid having an effective amount of nitrogen-containing base (e.g., a nitrogen-containing superbase) disposed thereon. Other embodiments of the present invention relate to methods for preparing the aforementioned treated particles; the treated particles themselves; and methods of using the treated particles and compositions of the various embodiments of the present invention.

The invention provides a chemical enzymatic method for preparing (R)-1-(1-naphthyl) ethylamine, wherein the nano palladium is supported by a solid superbase to obtain immobilized palladium; Candida Antarctica lipase B (CALB) was covalently bound to the surface of epoxy resin carrier to obtain immobilized CALB. In reaction system A, immobilized CALB was used as catalyst, toluene as solvent, ethoxyacetate as acyl donor, (R)-1-(1-naphthyl) ethylamine is selectively esterified, solid-liquid separation is carried out after the reaction, immobilized CALB is left in the reaction system A, liquid phase is removed from the reaction system A into the reaction system B, and the palladium catalyst is immobilized by the method, so that the reuse rate of the palladium catalyst is increased.