32 results about "4-Heptanone" patented technology

The invention discloses a plated film paint system. The plated film paint system comprises a transparent UV priming paint, a transparent UV intermediate coat used for coating a clad layer, a colored paint, and a transparent UV finishing coat; the transparent UV intermediate coat comprises, by weight, 20 to 50% of polyurethane acrylate, 5 to 10% of hydroxy acrylic resin, 10 to 20% of acetic ester,10 to 20% of butyl acetate, 10 to 20% of 2,6-Dimethyl-4-heptanone, and 0.5 to 3% of an auxiliary agent, wherein the molecular weight of the hydroxy acrylic resin is larger than 50000. The plated filmpaint system is adopted in preparation of the plastic part with metal effect coating, laser carving is carried out after coating of all the coats, the transparent UV finishing coat and the colored paint layer are removed via calcinations, clad layer metal effect is achieved. Compared with the prior art, the technology possesses following advantages: technology process is simple, production efficiency is increased, paint layer clunging force is high, and color change is not caused after laser carving.

The present invention provides an adhesive composition for use in bonding a polymeric fitting to an olefin-containing component of an article used in medical applications. The adhesive composition according to the invention includes an adhesive polymer system dissolved in a solvent system. The solvent system includes an organic solvent having a solubility parameter within the range of from about 7.5 to about 10 (cal/cm3)½. Subsequent to forming a bond between the polymeric fitting and the olefin-containing component, the adhesive composition can meet the requirements for USP Class VI materials. In a preferred embodiment of the invention, the adhesive composition includes a low shear mixture of an adhesive polymer system including an atactic polypropylene and a low density polyethylene that is dissolved in a solvent system including a blend of d-limonene and a ketone selected from the group consisting of 4-heptanone and cyclohexanone. The adhesive composition can be used, for example, to bond polymeric fittings made of materials such as, but not limited to, acrylic, polycarbonate, polyvinyl chloride, polyolefin, acrylonitrile butadiene-styrene, and polyester, to olefin-containing components of articles used in medical applications such as, but not limited to, tubing.

The invention discloses a preparation method of pyrrolizidine-9-acetic acid hydrochloride, comprising the following chemical reactions: 1) preparing 1,7-bi-p-nitryl benzenesulfonate -4-heptanone as a raw material according to the prior art for reacting with ammonium chloride and ammonia to generate pyrrolizidine-chlorate; 2) reacting the pyrrolizidine-chlorate with sodium cyanoacetate to generate pyrrolizidine-9-acetonitrile; and 3) allowing the pyrrolizidine-9-acetonitrile with concentrated hydrochloric acid to generate the pyrrolizidine-9-acetic acid hydrochloride. By adopting a chemical synthesis method, the preparation method of the invention greatly simplifies preparation flow, shortens reaction time and effectively lowers production cost; and the pyrrolizidine-9-acetic acid hydrochloride prepared by the preparation method has high yield and good quality, thus meeting the need of industrialized production.

The present invention discloses a heat treatment PAG water base quenching medium stabilizer, which comprises the following components, by weight, 1-10 parts of a foam breaking polysiloxane solution, 1-12 parts of 2,6-dimethyl-4-heptanone, 1-15 parts of alkenyl succinic acid-zinc naphthenate, 1-5 parts of barium sulfonate, and 1-8 parts of polyethylene glycol. The heat treatment PAG water base quenching medium stabilizer is mainly used for a water base quenching medium adopting polyaleneglycol (PAG) as a main component, wherein an addition amount is 0.1-2% of a weight of a PAG aqueous solution. The invention further discloses uses of the heat treatment PAG water base quenching medium stabilizer.

Methods, systems and catalysts for converting an alcohol containing feedstock to an upgraded material in a single catalyst bed wherein a feedstock is fed to a catalyst under preselected conditions to obtain an intermediate; and condensing the intermediate through an aldol condensation reaction to yield a product containing an upgraded material. In one instance the feedstock includes ethanol, the catalyst is a mixed metal oxide catalyst and the upgraded material is typically a C₅+ ketone(s) or alcohol(s), such as 2-pentanone, 2-heptanone, 4-heptanone and 2-nonanone.

The invention relates to a high-fillibility high-rubbing property primer and a preparation method thereof. The method comprises the following steps: according to parts by weight, adding 20-40 parts of modified acrylic resin A, 10-20 parts of modified acrylic resin B, 2-4 parts of wetting dispersant, 10-15 parts of nano talcum powder, 5-10 parts of superfine barium sulfate, 0.2-0.5 parts of carbon black, 0.5-1 part of anti-settling agent, 5-15 parts of xylene, 5-10 parts of n-butyl acetate and 5-10 parts of dimethyl-4-heptanone respectively in a vat in sequence, and stirring for 30min at 600-800r/min, then putting into a grinder to grind to a fineness below 10 micrometers and discharging, and finally adding 0.2-0.5 parts of fluorocarbon-modified polyacrylic acid flatting agent and stirring for 30min at 600-800r/min. Compared with the prior art, the primer has the advantages of excellent adhesive force on various PP+GF (propene polymer and glass fiber), great easiness in polishing, excellent recoatability, suitability for various finishing coats and the like.

The invention relates to a preparation method of a 7A-pyrrolizidine-acetonitrile. Gamma-butyrolactone as raw material is subjected to nucleophilic substitution reaction, acid hydrolysis cyclization reaction and nucleophilic addition decarboxylation reaction for preparing the 7A-pyrrolizidine acetonitrile. The method is characterized in that a transition intermediate CMP-1 is subjected to separation and purification to substitute a carbon chain constructed by a parent nuclear provided by 1,7-dichloro-4-heptanone. The method has easy purification and high yield, and the intermediate is stable and easy to save and transfer. An inorganic ammonium salt ammonium acetate is used as a source of ammonia to substitute the ammonia widely used in a traditional process, so as to prepared product with high purity under mild conditions (GC>99%). The method avoids the disadvantages of high energy consumption (frozen reaction), long time consumption and low quality product (need to distillation, and the product purity between 98-99%) in a traditional process. The production process uses low-priced and easily available raw materials in each step, does not use toxic organic solvents, has easy post-treatment, produces few "three wastes" and is green and environment-friendly.

The invention discloses a catalyst for synthesizing 2,6-dimethyl-4-heptanone and a preparation method for the catalyst. The catalyst consists of following three parts in percentage by weight: 0.05-1.5 percent of an active component target, 0.2-8 percent of an auxiliary neodymium Nd and the balance of a composite carrier ZrO2-Al2O3; the weight of the composite carrier is used as a reference, ZrO2 accounts for 10-90 percent. The preparation method comprises the following steps: (1) dipping the composite carrier ZrO2-Al2O3 in a soluble salt solution of Nd, and performing solid-liquid separation, drying and calcining; (2) adding the carrier obtained in the step (1) into a soluble salt solution of Pd, adjusting the pH value to 3-4, dipping, drying and calcining to obtain the product. The catalyst disclosed by the invention has the characteristics that the raw material acetone conversion rate is high, and the product, 2,6-dimethyl-4-heptanone, is high in selectivity.

The invention provides a heterogeneous azeotropic distillation method for separating a 2-pentanone, 4-heptanone, water and carbon dioxide mixture. The method comprises the following steps: feeding a 2-pentanone, 4-heptanone, water and carbon dioxide raw material into a left half side of a partitioned water tower from an inlet of a raw material to be separated, carrying out gas-liquid separation, discharging a gas phase from a gas phase outlet, feeding into a condenser, and separating a condensed liquid by using a gas-liquid-liquid separator so as to obtain a carbon dioxide enriched gas phase,a ketone enriched phase and a water enriched phase, backflowing the ketone enriched phase into the left half side of the partitioned wall tower, backflowing the water enriched phase into a right halfside of the partitioned wall tower, extracting so as to obtain a carbon dioxide enriched gas, carrying out release, feeding the ketone enriched phase into the tower kettle of a distillation tower so as to obtain a 4-heptanone product, condensing a gas phase discharged from the top of the distillation tower by using a distillation tower condenser, backflowing a part of the gas phase into the distillation tower, and collecting the other part as a 2-pentanone product. The method has the advantages of being good in separation effect, and the investment expense and the mounting space can be greatlyreduced and saved.

The invention discloses a preparation method of 5-methyl-2-heptylene-4-one. The preparation method comprises the following steps of using gamma-butyrolactone as raw material, and reacting with sec-butylmagnesium bromide, so as to obtain a 2-sec-butyl-2-hydroxytetrahydrofuran intermediate; dewatering, so as to obtain a 5-sec-butyl-2,3-dihydrofuran intermediate; catalyzing, and opening loop, so as to obtain 1-hydroxyl-5-methyl-4-heptanone; dewatering, and shifting double bonds, so as to obtain a product of 5-methyl-2-heptylene-4-one. The preparation method has the advantages that the used gamma-butyrolactone and sec-butyl bromide are commodity products, so that the obtaining of reaction raw materials is easy, and the cost of raw materials is low; in addition, the chemical metering for oxidization reaction is avoided, the pollution is little, the operation is simple, the purity of the product is high, and the preparation method is suitable for industrial production.

The invention relates to a method for preparing ketone compounds. A reaction is carried out at normal pressure in a two-stage fixed bed reactor, a first-stage catalyst is CeO2, a reaction temperatureis 300-450 DEG C, a raw material is acetic acid, and a feeding mass space velocity of the raw material is 0.1-1.0 h<-1>. Acetone is generated after the acetic acid is subjected to a ketonization reaction in the first stage, and then a second-stage reaction is carried out. A second-stage catalyst is CeO2-SnO2, a reaction temperature is 350-450 DEG C, a raw material is ethanol, and a feeding mass space velocity of the raw material is 0.1-1.0 h<-1>. 2-pentanone and 4-heptanone are prepared through dehydrogenation and an Aldol condensation reaction in the second stage. The method is characterizedin that CeO2 and a cerium-based composite oxide are used as catalysts, and the catalyst is simple to prepare and has good stability. The ketone compounds are generated by efficiently catalyzing aceticacid and ethanol through a two-stage method, the conversion rate is up to 35% (based on the total carbon number), and the total selectivity of the ketone compounds can reach 99%, wherein the selectivity of 2-pentanone is 85%, and the selectivity of 4-heptanone is 15%. In the process, acetic acid and ethanol are taken as raw materials, the raw material source is wide, and a potential industrial application prospect is achieved.

The objective of the invention is to provide a titanium dioxide added waterborne acrylic paint with high weather resistance and capabilities of insulating and preserving heat and a preparation method thereof. The waterborne acrylic paint comprises acrylic resin, a dispersant, a wetting agent, a film forming agent, an antifoaming agent, a filling material and a solvent, wherein the film forming agent comprises amino resin; the antifoaming agent comprises 4-heptanone fluoride; and the filling material comprises rutile type titanium dioxide. The preparation method comprises the following steps: S1, predispersing the acrylic resin, the dispersant, the wetting agent, the filling material and the solvent so as to obtain a predispersed system; and S2, subjecting a predispersed system obtained in the step S1 to grinding treatment, then adding the film forming agent, the antifoaming agent and the solvent into the predispersed system in sequence, and carrying out uniform mixing under stirring so as to obtain the titanium dioxide added waterborne acrylic paint. According to the invention, after coating of the waterborne acrylic paint provided by the invention, infrared ray can be effectively reflected, so the temperature of the waterborne acrylic paint is lower than the temperature of a material; and cooling devices like an air conditioner are not needed for cooling even in solar terms with a high temperature, so the purpose of saving energy is achieved.

The invention relates to the technical field of compound synthesis, and particularly relates to a preparation method of a compound with hazel characteristic aroma. The preparation method comprises the steps of: reacting 2-butanone and phosphorus tribromide under proper conditions to obtain an intermediate product A, then adding magnesium powder and iodine, reacting under proper conditions to obtain an intermediate product B, and then reacting in the presence of Dess-Martin oxidant to obtain the compound with hazel characteristic aroma, wherein analysis proves that the compound is higher purity 5-methyl-4-heptanone. The compound with hazel characteristic aroma obtained by the preparation method provided by the invention is pure and natural in aroma.

The present invention is directed to a novel compound, 2-mercapto-5-methyl-4-heptanone, a process of augmenting, enhancing or imparting taste to a material selected from the group consisting of a foodstuff, a chewing gum, a medicinal product, and toothpaste comprising the step of incorporating an olfactory acceptable amount of 2-mercapto-5-methyl-4-heptanone, and a process of improving, enhancing or modifying a fragrance formulation through the addition of an olfactory acceptable amount of 2-mercapto-5-methyl-4-heptanone.