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 relates to a method for modifying the polarity of elastomer resin, which is characterized in that: the elastomer resin is subjected to melt grafting modification by using sorbic acid as a grafting agent on the premise that an initiator is not added. The method comprises the following steps of: putting the elastomer resin and the sorbic acid (2,4-hexadienoic acid) into processing equipment at one time, and uniformly mixing at the temperature of between 20 and 80 DEG C to obtain composite glue; and feeding the composite glue into reaction equipment, making the composite glue become a melt at the temperature of between 135 and 200 DEG C, maintaining reaction of various components in the melt for 5 to 60 minutes, discharging, and cooling to obtain the elastomer resin subjected to polarity grafting modification. The method effectively solves the problem that the elastomer resin is over-crosslinked easily by the conventional modification technology, and the obtained polarity grafting modification product has thermoplasticity and a bright application prospect in the field of thermoplastic elastomers.

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 specificity of 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 relates to a preparation method of γ-substituted hexadienoic acid, which is characterized in that: (1) at 10-40°C, add a solvent, a catalyst, and a catalyst assistant to a reaction vessel, stir, and introduce oxygen, and add 1-( 2-furyl)-1-alkylcarbinol, control catalyst: catalytic promoter: the molar ratio of 1-(2-furyl)-1-alkylcarbinol is 0.0001~5:0.0001~3:100, and the reaction temperature is 0~200℃, pressure 0.1~20MPa, reaction 1~74h; solvent is a mixture of water phase and organic phase with a volume ratio of 1:0.01~3, the water phase is a phosphate acid solution, and the organic phase is a reaction inert solvent , the catalyst is a palladium compound, and the catalytic assistant is an amine or a phosphine compound; (2) cooling the reaction vessel to room temperature, adding an organic solvent for extraction, and performing vacuum distillation on the organic phase. The invention has the advantages of avoiding technical and economic disadvantages in the existing synthetic route, simplifying the technological process, reducing consumption and emission, reducing energy consumption and cost, and being suitable for industrialized production with expanded production capacity.

The invention provides a preparation method of 2,4-hexadienoic acid, which comprises the following steps in sequence: using glacial acetic acid as a raw material, obtaining vinyl ketone through high-temperature cracking at 700-800°C; condensing the obtained vinyl ketone with β-methacrolein to obtain 2 , 4-hexadienoic acid polyester; depolymerize the obtained 2,4-hexadienoic acid polyester under the catalysis of a composite solid acid catalyst to obtain crude 2,4-hexadienoic acid, and obtain the product 2,4-hexadienoic acid after post-processing. The method completely hydrolyzes 2,4-hexadienoic acid polyester, improves the depolymerization yield of 2,4-hexadienoic acid polyester, and the single depolymerization yield reaches 90%, and the finished product yield is high, and the unreacted β-methylpropene Aldehyde, solvent and ethanol solution can be recycled, no salty waste water is generated, and clean production is truly realized.

The invention discloses a stretch-proof biodegradable plastic. The plastic is prepared from the following raw materials in parts by weight: 15-20 parts of acrylic resin, 30-40 parts of canna starch, 25-30 parts of bran powder, 55-65 parts of polytetrafluoroethylene, 20-25 parts of polytetramethylene ether glycol, 10-15 parts of dimethoxymethane, 10-15 parts of hexadienoic acid, 5-10 parts of zinc stearate, 5-8 parts of hyaluronic acid, 2-4 parts of triethanolamine, 1-2 parts of plasticizer and 1-3 parts of antioxidant. The plastic product prepared by the method has excellent stretching performance and can be easily degraded. Furthermore, the invention further discloses a corresponding preparation method.