52results about How to "Acidic" patented technology

The invention provides a method for preparing 2,5-furandicarboxylic acid by catalyzing fructose with a supported bifunctional catalyst. According to the method, a supported heteropolyacid salt is taken as a catalyst; and the catalyst disclosed by the invention is the bifunctional catalyst, and has acidity and catalytic oxidation performance. The fructose and biomass materials rich in the fructose can be efficiently catalyzed to dewater and prepare HMF; and meanwhile, 2,5-furandicarboxylic acid can be prepared by in-situ catalytic oxidation of the HMF at high selectivity. The catalyst is convenient to recycle and good in reusability, so that a foundation is laid for efficient preparation of the 2,5-furandicarboxylic acid.

The invention provides a flame-retardant PCABS composition. The material is prepared from the following raw materials in percentage by mass. The polycarbonate composition is prepared from, by weight,50%-80% of polycarbonate (PC), 5%-16% of terpolymer (ABS) of acrylonitrile (A)-butadiene (B)-styrene (S), 5%-10% of flexibilizer, 1%-5% of synergistic flame retardant, 0.1%-2% of synergistic flexibilizer, 3%-15% of flame retardant and 0.1%-2% of anti-dripping agent. According to the flame-retardant PCABS composition, through extrusion production of YBL-ABS, reduction of material performance can beeffectively avoided; the synergistic flame retardant and the phosphazene flame retardant are added, so that the toughness of the material is not influenced while the flame retardant property is improved, the rigidity is improved, and the physical property and the flame retardant property of the material are prevented from being degraded at high temperature and high humidity. The synergistic toughening agent can neutralize alkaline substances in the material, so that PC degradation caused by the alkaline substances at high temperature is avoided; in addition, the processing mode is simple, industrialization is easy to achieve, and the method can be widely applied to industries such as automobiles, refrigerators, televisions and new energy.

The invention belongs to the technical field of accelerators, and particularly relates to a concrete liquid accelerator. Aiming at problems in the prior art that the existing powdery accelerator has the disadvantages of low dissolving speed, difficult dispersion and the like, and can be only applied to dry spraying process construction; most of the powdery accelerators contain strong alkaline substances so that eyes and skin of construction workers are easily injured and concrete strength is easily reduced, a scheme is provided, wherein the concrete liquid accelerator comprises 35-45 parts ofaluminum sulfate, 3-9 parts of sodium fluoride, 6-12 parts of a defoaming agent, 7-10 parts of a stabilizer, 5-10 parts of glycerol, 10-15 parts of hydroxycarboxylic acid, 4-10 parts of a preservative, 5-12 parts of a thickener, 10-20 parts of a peculiar smell adsorbent and 35-55 parts of water. The concrete liquid accelerator is convenient to prepare, the dissolving speed is increased, the working efficiency is improved, workers and the environment are not damaged, the anti-corrosion performance of concrete is improved, and the strength of the concrete is enhanced.

The invention provides a method for preparing 2,5-furandicarboxylic acid from fructose catalyzed by a loaded bifunctional catalyst. The method uses a loaded heteropolyacid salt as a catalyst. The catalyst disclosed in the invention is a bifunctional catalyst, which has both acidity and catalytic oxidation performance. It can efficiently catalyze the dehydration of fructose and fructose-rich biomass raw materials to prepare HMF, and can also catalyze the oxidation of HMF in situ to prepare 2,5-furandicarboxylic acid with high selectivity. The catalyst is easy to recycle and has good reusability. This laid the foundation for the efficient preparation of 2,5‑furandicarboxylic acid.

The invention relates the field of genetic engineering, and in particular relates to high-specific activity acidic beta-mannase Man5D as well as a gene and an application thereof. The amino acid sequence of the mannase is as shown in SEQ ID NO.1 or SEQ ID NO.2. The mannase provided by the invention has the following properties: the optimal pH value is 5.0, over 60% of the enzyme activity of the mannase can be maintained within the pH value of 3.5-8.0, the optimal reaction temperature is 65 DEG C, the enzyme activity is very stable at 50 DEG C, and in addition, the specific activity is 3133 U mg<-1>. The mannase has acidity, high specific activity and good heat resistance, and can be applied to industries such as feeds, foods and medicines. According to the technical scheme, mannase which is excellent in property and is applicable to industrial application can be produced by using genetic engineering methods.

The invention provides a photocatalyst coating. The photocatalyst coating is characterized by comprising raw materials in percentage by mass as follows: 2%-6% of nano-titanium dioxide, 20%-35% of a sodium silicate solution, 20%-30% of white carbon black, 5%-16% of glycollic acid, 2%-5% of a silicone acrylic emulsion and the balance of water, wherein the mass fraction of the sodium silicate solution is 50%-80%, and the mass fraction of an aqueous glycollic acid solution is 15%-25%. The coating has better water resistance and bonding power as well as good wear resistance, and furthermore, the photocatalytic degradation effect on nitrogen oxide is better.

The invention discloses a cobalt-chromium modified catalyst and a production method and application thereof. The cobalt-chromium modified catalyst contains the raw materials of (1) a catalyst carrierand (2) a metal catalyst, wherein the catalyst carrier comprises titanium dioxide; the metal catalyst comprises a chromium source precursor, a cobalt source precursor, a vanadium source precursor anda molybdenum source precursor; and in the catalyst, the vanadium content is not lower than 2 wt%. According to the catalyst, not only can nitric oxides be removed efficiently by the catalyst, but alsosulfur-containing volatile organic matters are subjected to catalytic oxidation, so that synergistic purification of the sulfur-containing volatile organic matters and NOx is achieved at least.

The invention relates to a beta / ZSM-5 compound borosilicate molecular sieve. Non-water chemical constitution expression of the molecular sieve is: xNa2O.B2O3.ySiO2, wherein, x is 0.03-2 and y is 10-400. The molecular sieve is prepared by adding beta borosilicate molecular sieve, which is taken as inoculating seed, to synthetic materials of the ZSM-5 compound borosilicate molecular sieve by hydrothermal crystallization; therefore, the molecular sieve has strong acidic property and high aromatization performance.

The invention discloses a glass-ceramic ceramic tile, which comprises the following component raw materials in parts by weight: 10-25 parts of crystal frit, 10-20 parts of quartz, 5-10 parts of wollastonite, 10-30 parts of diopside, 5-10 parts of anorthite, 5-10 parts of fluorite, 0-1.5 parts of colored metal oxide powder, 0-5 parts of feldspar, 0-5 parts of clay, the powder blank is prepared first and then pressed into tablets , after the initial firing, then the initial polishing, then the re-calcination, and finally the post-processing to get the finished glass-ceramic tiles. The ceramic raw materials used in the present invention produce microcrystalline crystal phases of various oxides under high temperature conditions, avoid using titanium, zirconium or lead oxides as crystal nuclei, and have no radiation and lead hazards. Crystal glass tiles have the characteristics of strong surface compactness, high transparency, rich texture, good hardness and wear resistance, and the present invention uses fluorite as a flux and color aid to make ceramics not easy to fade.

The invention relates to a preparation method of adipic acid dialkyl ester, which comprises the following steps: by using [Cu<II>Mo<n>] heteropolyacid as a catalyst and adipic acid and a fatty alcoholas raw materials, reacting at 100-160 DEG C for 4-12 hours, and carrying out after-treatment to obtain the adipic acid dialkyl ester. Compared with the prior art, the raw materials are easy to obtain, the preparation method is simple, economy and environmental friendliness are achieved, and the used catalyst has the advantages of being high in reaction activity, easy to recycle and the like and has popularization and utilization value.

The invention relates to the technical field of a clean energy source, in particular to a coal and biomass mixing process. The mixing liquification of coal, biomass and oil is creatively realized forthe first time. Firstly, coal and biomass raw materials are subjected to treatment of crushing, compression and secondary crushing; then, slurry is prepared; biomass coal oil slurry with high solid content and capability of being stably conveyed by a pump is successful obtained, so that high-viscosity waste oil which cannot be used as a coal and biomass liquification solvent in the prior art can also be utilized. Hydrogen gas is introduced into the biomass coal oil slurry for reaction, so that coal and biomass are liquified at high pressure and high temperature; then, cracking and hydrogenation reaction are further performed, so that the conversion of coal and biomass into biological oil is realized. The process provided by the invention has the advantages that the coal and biomass conversion rate can reach 90 to 99 percent; the yield of the biological oil can reach 60 to 80 percent; the residue quantity is not higher than 2.5 weight percent.

The present invention relates to full organic-type engine cooling liquid. The full organic-type engine cooling liquid comprises the following raw material components in weight percentages: 30-97% of ethylene glycol, 0.2-10% of fatty carboxylic acid or alkali metal salts thereof, 0.01-1% of a triazole compound, 0.01-1.2% of alcohol ether phosphate, 0.01-2% of imidazole, 0.001-0.3% of a defoamer andthe balance deionized water. Compared with the prior art, the provided cooling liquid has good multi-metal anticorrosive performance to engines, does not contain nitrite, borate, nitrate, silicate and amine compounds, has little environmental pollution, improves the reserve stability and anti-hard water ability of the cooling liquid, solves problems of blackening of cast aluminum, cavitation corrosion, etc., and can ensure long-term operation of an engine cooling system.

The invention discloses a non-toxic fire-resistant insulated cable. The non-toxic fire-resistant insulated cable comprises wire cores and a protective layer, wherein each wire core sequentially comprises a conductor, an isolating layer and an insulating layer from inside to outside; the wire cores are arranged inside the protective layer in parallel; the protective layer is shaped like a flat ribbon; a reinforcing core is further arranged inside the protective layer; the reinforcing core is parallel to the wire cores; the protective layer is made of a halogen-free and flame-retardant polypropylene composite material; the halogen-free and flame-retardant polypropylene composite material comprises the following raw materials in parts by weight: 40-45 parts of polypropylene resin, 11-17 parts of an inorganic flame retardant, 4-9 parts of an aromatic amine antioxidant and 1-5 parts of a lubricant. The non-toxic fire-resistant insulated cable has the excellent characteristics of flame retardance and fire resistance, is free of toxicity and acid gas after combustion, and has the advantages of high flexibility, elasticity, firm structure and the like.

The invention provides a preparation method of chloranil, which belongs to the technical field of chemical production. The present invention uses glacial acetic acid as solvent, and glacial acetic acid has certain solubility to tetrachloroquinone, but the solubility to product tetrachlorobenzoquinone is very little, helps to improve product yield; And glacial acetic acid has acidity, when using nitric acid as oxidant , can increase the oxidation of nitric acid. The present invention uses nitric acid or chlorine as an oxidant to oxidize tetrachlorohydroquinone to prepare tetrachlorobenzoquinone. The raw materials are cheap and easy to obtain, the operation method is simple, the reaction route is short, and equipment investment is small, and the production cost has a very high market. Competitive, and the product yield is higher than 98%, no special purification treatment is required, and the final product purity is higher than 99.0%.