42 results about "Hexadienoic Acid" patented technology

Described is a method of making sorbic acid, pentadiene, or 3-penten-2-one. The method includes partially hydrogenating 4-hydroxy-6-methyl-2-pyrone (HMP) to yield 5,6-dihydro-4-hydroxy-6-methyl-2H-pyran-2-one (4-DHMMP). Then, if 3-penten-2-one is desired, thermally decomposing the 4-DHMMP to yield 3-penten-2-one. If sorbic acid or pentadiene are desired, the 4-DHMMP is hydrogenated to yield 4-hydroxy-6-methyltetrahydro-2-pyrone (4-HMTHP). The 4-HMTHP is then dehydrated by contacting it with a solid acid catalyst to yield parasorbic acid (PSA). The PSA can then be ring-opened by contacting it with a solid acid catalyst. The reaction conditions of the ring-opening reaction can be controlled to yield sorbic acid and/or pentadiene.

The invention provides a preparation method of 2, 4-hexadienoic acid polyester. The preparation method comprises the following steps of adding 500-650 parts by weight of beta-methyl acrolein and 3-15 parts by weight of titanium dioxide-silicon dioxide-caprolactam composite catalyst into a reaction kettle, stirring, introducing ketene gas at the temperature of 35-50 DEG C for reaction, filtering after the completion of the reaction, and performing negative pressure rectification on a reaction solution to obtain 2, 4-hexadienoic acid polyester. The condensation catalyst used in the method adopts the titanium dioxide-silicon dioxide-caprolactam composite catalyst, so that the conversion rate of beta-methyl acrolein is improved, the yield of the product 2, 4-hexadienoic acid polyester is simultaneously improved, and the waste water amount produced by production is also reduced; by using the method, the single-pass conversion rate of the raw material beta-methyl acrolein can achieve 95%, and the single-pass yield of the 2, 4-hexadienoic acid polyester can be above 90%.

The invention provides application of hexadienoic acid in preparation of pig feed additive and pig feed, which is novel important application of the hexadienoic acid, and can be applied to preparation of the pig feed additive or the pig feed. The pig feed added with the hexadienoic acid is a safe feed, and does not contain substances which are toxic or harmful to growth and health of pigs. Compared with conventional feed additives, the pig feed additive can effectively improve the pork quality while improving the secretion level of blood insulin-like growth factor-I (IGF-I) by the specificityof the pig feed additive and improving the growing performance of the pigs, so that the slaughtering speed can be increased, the grade of meat products can be improved, and the pork products have higher market values. In the application, additive amount of the hexadienoic acid is small, and can be directly added into premix, the adding process is convenient and rapid, and the preparation method is simple without special requirement for equipment, so the hexadienoic acid has quite wide popularization and application prospect.

The invention provides a preparation method of 2, 4-hexadienoic acid. The method sequentially comprises the following steps: with glacial acetic acid as a raw material, pyrolyzing the glacial acetic acid at the high temperature of 700-800 DEG C to obtain ketene; condensing the obtained ketene with beta-methylacrolein to obtain 2, 4-hexadienoic acid polyester; and depolymerizing the obtained 2, 4-hexadienoic acid polyester under the catalysis of a composite solid acid catalyst to obtain a 2, 4-hexadienoic acid crude product, thus obtaining a 2, 4-hexadienoic acid product through aftertreatment. The method has the advantages that the 2, 4-hexadienoic acid polyester is completely hydrolyzed, so that the depolymerization yield of the 2, 4-hexadienoic acid polyester is increased, the single depolymerization yield is up to 90% and the finished product yield is high; the unreacted beta-methylacrolein, a solvent and an ethanol solution can be recycled and no salt-containing wastewater is produced, so that clean production is truly realized.

The invention discloses a food preservative and a preparation method thereof. The food preservative is prepared from the following components in parts by weight: 20-30 parts of nisin, 5-15 parts of chitosan, 10-15 parts of a lemon extract, 6-10 parts of sodium hexametaphosphate, 10-16 parts of lysozyme, 5-12 parts of sodium alginate, 2-6 parts of 2,4-hexadienoic acid, 2-4 parts of tea polyphenols,3-7 parts of maltitol and 5-10 parts of a lotus leaf extract. The food preservative and the preparation method thereof provided by the invention have the following beneficial effects: the food preservative has wide and easily-available sources of component materials, no harm to the human body, no toxicity, high safety factors, greenness and environment friendliness, can effectively inhibit the growth of mold and the like, has good preservation effects, is simple to prepare and has a wide range of application, low cost and broad application prospects.

The invention discloses a preparation method of a cable material for rare earth based precision equipment. The preparation method comprises the following steps: preparing an activated adhesive from vinyltriethoxysilane, polymethylphenyl siloxane fluid, sodium metabisulfite, cyclosiloxane fatty ester, dimethyl phthalate, manganese acetate, sodium chromate, hexamethylenetetramine and the like as rawmaterials, and then, enabling the activated adhesive and raw materials including rare earth, ethyl methacrylate, polycarbonate, polysulfone, polymethyl methacrylate, polyalkylene glycol, rosin resin,barium ferrite, azobisisobutyronitrile, 6-methoxy-2-naphthaldehyde, hexadienoic acid, diethylene triaminepentaacetic acid, triethyl phosphate and the like to be respectively subjected to high-temperature internal mixing, magnetic stirring, mold casting, static cooling, water-cooled drawing, solid solution and aging and the like, thereby obtaining the cable material for the rare earth based precision equipment. The prepared cable material for the rare earth based precision equipment has good electrochemical properties and material stability and can be suitable for multiple precision equipment.

Compositions and methods are disclosed for preventing the oxidative corrosion of metal surfaces by exposing a metal surface to an anti-corrosion agent characterized as 2,4-trans, trans-hexadienoic acid (2,4-HDA), its alkali salt identified as potassium sorbate (KHDA), or other derivatives that conserve or embody the 2,4-trans, trans-hexadiene-type moiety present in their molecular structures as an active anti-corrosion agent (ACA), in combination with a material capable of forming a moisture retentive barrier over the metal surface. The compositions and methods of the invention provide a practical, non-toxic way of ensuring anti-corrosion protection for metals, or devices containing exposed metals, stored or operated in water or in the presence of water vapor. Exemplary, non-exhaustive uses of the invention include employing the composition as a lubricant for the surface of a metal or as a pump oil or brake fluid; using the composition as an undercoating for painting, electro-plating or electro-polishing procedures; and providing a protective coating for any metal or metal-containing machine or device, from automotive assembly plant metal press machines to electronic circuit boards.

The invention discloses a medium trace element fertilizer for adjusting alkaline soil and a preparation method thereof. The medium trace element fertilizer comprises the following components in percentage by mass: 40-60% of medium trace element-containing substances, 30-50% of acidic substances and 1-10% of auxiliaries. The medium trace element is a mixture containing two or more of calcium, magnesium, silicon, sulfur, iron, manganese, copper, zinc, boron and molybdenum; the acidic substance is one or a mixture of more than two of urea sulfate, citric acid, methylene succinic acid, maleic acid, oxalic acid, acetic acid and hexadienoic acid; the auxiliary is one or a mixture of more than two of xanthan gum, guar gum, biochemical fulvic acid, molasses, chitosan oligosaccharide, ethylene glycol, polyethylene glycol and ethanolamine. On one hand, trace elements in soil are supplemented, on the other hand, the PH value of the soil is improved, and absorption of crops to the trace elements is promoted.

The invention provides a degradable foaming sole, which is prepared from the following raw materials in percentage by weight: 40 to 50 percent of EVA, 0.1 to 1 percent of crosslinking auxiliary agents, 0.1 to 3 percent of corn flour, 0.1 to 3 percent of lime cream, 0.1 to 3 percent of hexadienoic acid and 40 to 60 percent of low-melting point polyester slices. The degradable foam sole has the characteristics that the weight is light; wear-resistant performance and anti-slip effects are achieved; the dimension is stable.

The invention discloses a production method for antibacterial agent potassium hexadienoic acid. The method comprises the following main steps: adding sorbic acid into a reaction kettle, adding water with the weight of 75-80% of the weight of the sorbic acid, adding a potassium hydroxide solution with the mass fraction of 30-36% dropwise at the temperature of 55-60 DEG C until the pH of a reactionsolution is 8.3-8.6, and performing a reaction for 70-90min; adding a certain amount of activated carbon, performing vacuum filtration, performing reduced-pressure distillation on the filtrate at thetemperature of 50-56 DEG C for 1-2h, performing heating to the temperature of 60-64 DEG C, and discharging a material; and performing centrifugal dewatering to obtain a crystal, recovering a mother liquor, and finally performing drying at the temperature of 115-120 DEG C for 2-3h, so as to obtain the product.

The invention discloses a preparation method of 2,6-dioxabicyclo-(3.3.0)-octane-3,7-dione, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: taking hexadienoic acid as a raw material, carrying out addition reaction with bromine under the action of a catalyst to obtain 3,4-dibromoadipic acid, then reacting with a deprotonation reagent toobtain dicarboxylate, and then carrying out heating reaction to obtain 2,6-dioxabicyclo(3.3.0)-octane-3,7-dione. The method has the advantages of simple and efficient post-treatment operation of eachstep, simple and easily available raw materials, short reaction steps and high product purity, and meets the requirements of large-scale production.

The invention discloses an ester-based composite material which is prepared from the following raw materials by weight percent: 40 to 50% of polypropylene carbonate, 0.1 to 1% of gamma-octanoic lactone, 0.1 to 3% of dioctyl adipate, 0.1 to 3% of ethyl methacrylate, 0.1 to 3% of hexadienoic acid and 40 to 60% of glyceryl triacetate. According to the ester-based composite material disclosed by the invention, varieties of ester substances are mixed to replace an original fiber reinforcing material; thus, overall performance of the composite material is improved, and the material has the advantages of good bending strength and heat distortion temperature.

The invention discloses a latex sponge. The latex sponge is composed of the following substances in part by weight in a preparation process: 100 parts of hexadienoic acid, 35-75 parts of polyvinyl alcohol, 0.5-1.5 parts of nano-silica, 0.2-0.6 part of polystyrene resin, 1.2-1.3 parts of silicone oil and 1.5-3.5 parts of foaming agent water. Through adjustment for the raw materials and formula of the product, the latex sponge with no rubber pungent odor is produced by using the processing technology of a slow rebound sponge. The essence of the latex sponge is the sponge but has the characteristics of latex and is superior to a latex and is free of pungent odor of the latex; the latex sponge is soft, odorless and highly comfortable, can meet the needs of people for the sponge and the latex,and can completely replace the sponge and the latex. The foaming density of the latex sponge disclosed by the invention can reach about 40 D, a large amount of raw materials are saved and the densityof the finished product latex is at least 70 D.

The invention provides a production apparatus for the antibacterial drug 2,4-hexadienoic acid. The production apparatus mainly comprises a storage tank 1 (F101), a storage tank 2 (F102), a storage tank 3 (F103), a storage tank 4 (F104), a condenser (C101) and a reaction vessel (D101), wherein the storage tank 1 (F101) and the storage tank 2 (F102) are connected with the reaction vessel (D101) in parallel; the storage tank 3 (F103) and the storage tank 4 (F104) are connected with the reaction vessel (D101) in parallel; the condenser (C101) is connected with the reaction vessel (D101); the reaction vessel (D101) has a nominal volume of 300 to 350 L; and the barrel of the storage tank 1 (F101) has a wall thickness of 6 to 7 mm.

The invention discloses a biological mould inhibitor harmless to a human body. The biological mould inhibitor harmless to the human body is prepared from the following components in parts by weight: 10 to 14 parts of cresol, 4 to 9 parts of dehydroacetic acid, 2 to 7 parts of phenethyl alcohol, 9 to 13 parts of chlorhexidine iodine, 2 to 6 parts of hexadecylpyridinium chloride, 1 to 6 parts of cassia oil, 5 to 10 parts of hexadienoic acid and 3 to 11 parts of propyl p-hydroxybenzoate. Through the way, the biological mould inhibitor harmless to the human body, disclosed by the invention, is capable of changing the osmosis of a cell serous membrane, inhibiting inactivation of cells caused by elimination of enzymes and metabolites in the cells, is reasonable in use and harmless to the human body and can be degraded into normal components, and the use is not affected.

The invention discloses a latex sponge. The latex sponge comprises the following raw materials in parts by weight: 100 parts of hexadienoic acid, 35-75 parts of polyvinyl alcohol, 0.5-1.5 part of nanometer silicon dioxide, 0.2-0.6 part of a polystyrene resin, 1.2-1.3 part of a silicon oil, 1.5-3.5 parts of water as a foaming agent. The latex sponge without rubber irritation smell is produced by the processing technology of slow rebound sponge through adjusting the raw materials and formula of the product, the sponge is essentially a sponge, but it has the characteristics of latex, and is superior to latex, and has no irritation smell of latex; the latex sponge is soft, odorless and comfortable, which can meet the parallel demand of people for sponge and latex, and can completely replace sponge and latex. As that foam density of the latex sponge of the invention can be about 40D, a large amount of raw materials are saved, and the density of the finished latex is at least 70D.

The invention relates to an alkyl benzoic acid resin manufacturing method, mainly comprising the following steps: material preparation: dividing the raw materials into two systems: category A and category B, wherein the category A comprises benzene olefin, and R1, R2 and R3 bases of the olefin are alkenes or alkanes with 1-5 carbon atoms, the category B comprises an acids system, comprising propenoic acid, trans-butenedioic acid, cis-butenedioicacid, maleic anhydride, trans-2-butenoic acid, cinnamic acid, trans,trans-2,4-hexadienoic acid and aconitic acid, and taking one or more than one of the components as raw materials; heating: adding the raw materials in a reacting furnace for being heated, wherein the temperature can reach 10-200 DEG C, and the pressure of a reactor is one atmospheric pressure or more than one atmospheric pressure; polymerization: carrying out polymerization reaction of the raw materials in the reactor; and formation: granulating the polymerized resin into particles or sheets by a granulator, or directly cooling the resin into blocks.