67 results about "Tribasic acid" patented technology

The invention discloses a red-mud citric acid dealkalizing technique. According to the technique, citric-acid three-level cross-flow dealkalizing operation is carried out on red mud, and Bayer-process red mud is dealkalized through citric acid. Due to the fact that the citric acid is organic tribasic acid, sodium and potassium in the red mud can be effectively removed under the condition of the lower citric acid using amount and the low temperature, the pH value of the dealkalized sludge ranges from 6.5 to 7.5, and the dealkalized sludge can be dammed and piled. Residual citric acid in the dealkalized sludge of the red mud can be degraded biologically, has a repairing function on alkaline soil and can serve as a modifying agent for the alkaline soil. The citric acid can generate calcium citrate sediment with other elements like calcium, so that calcium can be solidly stored in the dealkalized sludge of the red mud to be used as raw materials for manufacturing building materials. Elements like titanium, scandium and rare earth are difficult to dissolve out, the taste of the elements in the dealkalized sludge of the red mud is improved, and the dealkalized sludge can be used as raw materials to extract valuable rare metal. According to the red-mud citric acid dealkalizing technique, the citric acid can be recycled, and the consumption of chemical agents is reduced. In addition, the pH value of obtained dealkalized liquid ranges from 6.5 to 7.5, the dealkalized liquid does not contain heavy metal ions, and the dealkalized liquid can be drained and utilized.

The invention discloses biodegradable branched co-polyester and a preparation method thereof, and belongs to the polymeric chemical field. The preparation of branched co-polyester adopts a mature esterification and fasculation process route, butane diacid and butanediol which are used as main copolymerization units performs a copolymerization action with one or more than one of lateral group-containing aliphatic dibasic acid, C3, C5 to C8 alkane diacid, terephthalic acid or tribasic acid, or performs a copolymerization action with one or more than one of lateral group-containing dibasic alcohol, C2, C3, C5 to C10 alkane diol or aliphatic trivalent alcohol, so as to obtain random branched co-polyester finally. The intrinsic viscosity of prepared co-polyester ranges from 0.6 to 2.2dl/g, the melting point ranges from 70 to 115, the degree of crystallinity ranges from 20 to 70 percent, and the weight average molecular weight ranges from 5 to 300000. The co-polyester preparation method adopts efficient a blended catalyst, so that the polymerization time is reduced greatly, and the molecular weight and the performance of the products are increased. New performances are given to polyester through quoting third components containing lateral groupsor multi-functional groups, thereby extending the application range of polyester.

The invention provides a tung oil source epoxy plasticizer product having the function of a heat stabilizer, a preparation method thereof and an application thereof. According to the technical scheme of the invention, dienophile is uniformly mixed up and then methyl eleostearate is added. The dienophile and the methyl eleostearate are subjected to Diels-Alder addition reaction, and then fractions are collected in the vacuum condition so as to obtain tung oil source polybasic acid esters including tung oil source dibasic acid dimethyl ester, tung oil source ternary acid trimethyl ester and the like. With the existence of hydrogen peroxide, formic acid, phosphoric acid and the like, one part of unsaturated double bonds in the structures of the tung oil source polybasic acid esters is subjected to epoxidation, so that the tung oil source epoxy plasticizer product can be obtained. According to the technical scheme of the invention, methyl eleostearate is adopted as a raw material, and the obtained tung oil source epoxy plasticizer product is low in volatility, small in mobility and good in compatibility with polyvinyl chloride resin and the like. Meanwhile, polyvinyl chloride products are enabled to be good in plastification effect, and the heat stability of PVC products is effectively improved at the same time. The tung oil source epoxy plasticizer product can be used to replace or partially replace plasticizer products including dioctyl phthalate, dioctyl terephthalate, epoxidized fatty acid methyl ester and the like.

The invention discloses a powder binder for a glass fiber chopped strand mat and a preparation method thereof. The powder binder is prepared from acid and alcohol according to a molar ratio of 1:0.95 to 1:1.05. The acid consists of fumaric acid, saturated dicarboxylic acid or acid anhydride of the saturated dicarboxylic acid and saturated tribasic acid or acid anhydride of the saturated tribasic acid according to the molar percentage of (40 percent to 94 percent):(5 percent to 50 percent):(1 percent to 10 percent); the saturated dicarboxylic acid or the acid anhydride of the saturated dicarboxylic acid is isophthalic acid or phthalic anhydride; the saturated tribasic acid or the acid anhydride of the saturated tribasic acid is trimesic acid or trimellitic anhydride; the dihydric alcohol consists of one of bisphenol A polyoxypropylene ether, hydrogenated bisphenol A and neopentyl glycol and bisphenol A polyoxyethylene ether according to the molar percentage of (5 percent to 50 percent):(50 percent to 95 percent); and the average addition molar number of the bisphenol A polyoxyethylene ether is 3. The powder binder disclosed by the invention not only can be fast dissolved inti vinyl benzene but also is good in transparency after being dissolved.

A coolant composition having anticorrosion properties against both aluminum and magnesium is provided. A coolant composition comprises a melting point depression agent selected from glycols and alcohols as the main component, and it contains a corrosion inhibitor selected from fluorides and a tribasic acid of an organic carboxylic acid or an alkali metal salt thereof.

The invention relates to a preparation method of high-hardness polyamide modified organic silicon resin. The method comprises the following steps that diamine, tribasic acid, aminated ultrafine alumina, a crosslinking catalyst and xylene are mixed evenly and heated at 180 DEG C-220 DEG C for 1 h-4 h, wherein the mole number of the tribasic acid is 1-2.0 times that of the diamine, the weight of the aminated ultrafine alumina is 1-2 times that of the diamine, the weight of the crosslinking catalyst is 1 percent-5 percent that of the diamine, and the weight of the xylene is 3-8 times that of the diamine; afterwards, the temperature is reduced to 90 DEG C, end-epoxy group organosilicone oligomer is added, and the mixture is heated at 120 DEG C-140 DEG C for 2 h-3 h, wherein the weight of the end-epoxy group organosilicone oligomer is 1.5-2.0 times that of the diamine; finally, the temperature is reduced to 90 DEG C, and an organic solvent is added, so that the solid content is 40 percent-50 percent by weight. The resin prepared through the method can be used for manufacturing high-temperature-resistant low-surface-energy coatings. According to the method, the aminated ultrafine alumina, the diamine and the tribasic acid react together to prepare modified hyperbranched polyamide, and the heat resistance and the hardness of polyamide are enhanced; as the modified hyperbranched polyamide and the epoxy-group-containing organosilicone oligomer are in a cross-linking reaction, the heat resistance and the hardness of the polyamide are further enhanced.

The invention relates to a method for preparing a novel high-efficiency polybasic acid molysite flocculant. Industrial waste or a low-value byproduct is used as a main material. The flocculant can be widely used for multiple kinds of wastewater; the use amount of the flocculant is reduced by 1 to 3 times than that of other polymeric molysite; and the removing rate of TDS in the wastewater by the flocculant can reach between 45 and 80 percent and is higher than that of other polymeric molysite flocculant by 20 to 40 percent. The preparation method comprises that: firstly, iron slag with iron content of between 7 and 20 percent and other ferric scrap are heated by steam of waste sulphuric acid and react for 30 minutes to prepare a liquid ferrous sulfate coarse product; at a temperature of 60 DEG C, the coarse product is added with proper amount of sodium phosphate, is introduced with chlorine and is oxidized for 30 minutes; industrial waste alkali is used for regulating the basification degree for polymerization; and 2 percent calcium chloride as a stabilizing agent is added to the coarse product and is added with active carbon for adsorption and impurity removal to prepare a liquid product of a ferric sulfate chloride (phosphide)(abbreviated as tribasic acid molysite) flocculant in a polymeric state.

The present invention relates to a method of forming diazoalkanes. One aspect of the present invention provides a method for the production of a N-alkyl-N-nitroso compound from a starting material, comprising the use of a tribasic acid to acidify an amine. A second aspect of the present invention provides a method for the production of a diazoalkane, comprising reacting a N-alkyl-N-nitroso compound with a base and a phase transfer catalyst, wherein no organic solvent is used,

The invention discloses a preparation method of poly (carbonate ester-ether) trihydric alcohol. According to the preparation method of the poly (carbonic ester-ether) trihydric alcohol, carbon dioxide, an epoxy compound and tribasic acid have a polymerization reaction under the action of a catalyst to obtain the poly (carbonic ester-ether) trihydric alcohol; the catalyst is rare earth doped Zn3[Co(CN)6]2 based bimetallic cyanide; the tribasic acid is one or more than one of oxalosuccinate, tricarballylic acid, 1,3,5- trimesic acid, 1,2,4-benzenetricarboxylic acid and phosphoric acid; and the time of polymerization reaction is 3-9 hours. The preparation method of the poly (carbonic ester-ether) trihydric alcohol has short reaction induction period and short reaction time and has high carbonic ester unit content and low byproduct cyclic carbonic ester content.

The invention discloses an aerolite cutting fluid with low PH value and its preparation method, and belongs to the domain of the cutting fluid. The cutting fluid is prepared from, by weight ratio, trimethylolpropane trioleate, tall oil, triethanolamine, neodecanoic acid, phosphate, benzisothiazolone, hard water resisting agent, tribasic acid, benzotriazole, castor oil polyoxyethylene ether, trihydroxy hexahydro-s-triazine, and 2, 6-bismethylmorpholine; the allowance is water. The aerolite is extremely sensitive to alkalinity; the cutting solution has low PH value due to its special preparation method and composition, and the PH value is ranged from 8.0 to 8.3; the cutting fluid is free from corrosion to the aerolite and magnalium zinc alloy which are extremely easy to corrode; moreover, the class 2 and class 7 aluminum alloys in the aerolite are big in hardness and not easy to process. The cutting solution has excellent lubricating performance and can be used for cutting during the process conveniently; the surface smoothness is high.

The invention relates to a method for preparing polyamide modified organic silicon resin. The method includes the following steps that diamine, tribasic acid with the mole number 1 to 2.0 times that of the diamine, aminated superfine zinc oxide with the weight 1 to 2 times that of the diamine, cross-linking catalyst with the weight 1 percent to 5 percent that of the diamine and 2-(2-butoxyethoxy)ethyl acetate with the weight 3 to 8 times that of the diamine are evenly mixed and then heated at 180 DEG C to 220 DEG C for 1 h to 4 h; then, the mixture is cooled to 90 DEG C, organosilicone oligomer with end epoxy groups with the weight 1.5 to 2.0 times that of the diamine is added, and the mixture is heated at 120 DEG C to 140 DEGC for 2 h to 3 h; finally, the mixture is cooled to 90 DEG C, and organic solvent is added to make the solid content range from 40wt% to 50wt%. The resin prepared with the method can be used for preparing high-temperature-resistant paint with low surface energy. According to the method, the aminated superfine zinc oxide, the diamine and the tribasic acid react together to prepare modified hyperbranched polyamide, and thus the heat resistance and the hardness of the polyamide are improved; the modified hyperbranched polyamide and the organosilicone oligomer with end epoxy groups undergo cross-linking reaction, and thus the heat resistance and the hardness of the polyamide are improved.

The invention discloses a cross-linking agent for a bio-based adhesive and a preparation method of the cross-linking agent. The method comprises the following steps: firstly, carrying out acid amine dehydration condensation reaction on melamine and a binary acid under the condition of 170-190 DEG C to obtain a polycondensed triacid; carrying out dehydration condensation reaction on the polycondensed triacid and a polyethylene polyamine at 160-180 DEG C to obtain an acid amine polycondensation intermediate; dissolving the acid amine polycondensation intermediate in water, regulating the pH value to 7-10, and dropwisely adding epoxy chloropropane at 50-70 DEG C to react, thereby obtaining the cross-linking agent for the bio-based adhesive. When the cross-linking agent is added into the formaldehyde-free albumen glue, the heat curing temperature of protein can be reduced from 130 DEG C or above to 85 DEG C, and meanwhile, the albumen glue is provided with relatively good hot water resistance and adhesion performance.

The invention relates to the technical field of polyester polyol preparation, in particular to a method for synthesizing linear and multifunctional polyester polyol by using a double epoxy compound. Specifically, the method is characterized by adjusting the feeding ratio of dihydric alcohol to binary acid, when the reaction is carried out to a certain degree (acid value), a diepoxy compound is added, the functionality of the linear polyester polyol can be greater than any value (such as 2-10) of 2, and the product does not have a gel phenomenon in the synthesis process, which cannot be realized by synthesizing the polyfunctional polyester polyol by using trihydric alcohol or tribasic acid small molecules as an initiator. Particularly, only when the OH/COOH ratio (1.0 (i.e., COOH/OH is greater than 1), high-hydroxyl-value polyester polyol with the functionality of more than 4 can be synthesized, and linear polyol which cannot be gelled can be obtained. The product is widely applied to adhesives, synthetic leather, rubber and composite material products, and has practical application value.

The invention discloses water-based unsaturated polyester as well as a preparation method and application thereof. The water-based unsaturated polyester contains a structural unit I derived from unsaturated dibasic acid, a structural unit II derived from hydroxyl-containing aliphatic dibasic acid and/or hydroxyl-containing aliphatic tribasic acid and a structural unit III derived from polyhydric alcohol. The water-based unsaturated polyester disclosed by the invention has excellent water stability, high adhesive force and high flexibility, is simple in preparation process, does not contain an organic solvent, is green and environment-friendly, can be used as a water-based environment-friendly UV coating, and has a wide market prospect.

The invention discloses a polyester thermal fuse with a low melting point and good elasticity, and relates to the technical field of new materials. Organic dibasic acid, organic tribasic acid and alpha-propylene glycol of a certain molar ratio are adopted as modifiers, a modified high polymer is prepared by using the modifiers, terephthalic acid and ethylene glycol as raw materials through esterification reaction and polycondensation reaction, and then the polyester thermal fuse fiber is made by spinning. The polyester thermal fuse has the low melting point, excellent mechanical properties and good elasticity; when the polyester thermal fuse is elongated by 6.14%-7.05%, the polyester thermal fuse can be almost completely recovered; the wrinkle resistance of the polyester thermal fuse exceeds that of other fibers; the melting point range of the polyester thermal fuse is 118-138 DEG C.

The invention discloses light-cured resin based on organic polybasic acid as well as a preparation method and application of the light-cured resin. The light-cured resin based on the organic polyatomic acid has a structure shown as a formula (I) and/or a formula (II) as shown in the description, wherein R comprises a substituted or unsubstituted aliphatic chain or aromatic ring, and a substituentgroup comprises one or more hydroxyl groups. The preparation method comprises the following steps: heating a uniformly mixed reaction system containing a dibasic acid and/or tribasic acid, glycidyl methacrylate and an epoxy ring-opening catalyst to perform a ring-opening reaction so as to obtain the light-cured resin with the structure shown in the formula (I) and/or the formula (II). The preparation process is simple, the operation method is simple and convenient, the controllability is good, implementation is easy, the method is suitable for large-scale industrial production, and a repairable and remodelable light-cured coating prepared from the light-cured resin and UV photoinitiators or visible light initiators has excellent thermal property, mechanical property and recoverability.