53 results about "Glycerine acetate" patented technology

The invention provides a method for preparing acetin. The method comprises that: in the presence of alkali catalyst, grease reacts with acetate, and acetin and fatty acid ester are collected. The method has the advantages of: (1), producing the acetin directly by using the grease and the acetate, generating little side reaction, achieving high product quality and widely used by products; 2, avoiding using acetic acid and acid catalyst, solving the problem of serious corrosion existing in the conventional process and lowering requirements on equipment material and operation and maintenance costs; and 3, enlarging the application range of methyl acetate.

A preparation method of conjugated linoleic acid glycerides comprises the following steps: (1) C1-4 sodium alcoholate/potassium alcoholate is taken as a catalyst, linoleic acid short-chain alcohol ester is prepared to be conjugated linoleic acid short-chain alcohol ester through inversion reaction for 1-8 hours at 90-150 DEG C, and the using amount of the catalyst is 1.5-8.0% of weight of the linoleic acid short-chain alcohol ester; (2) sodium methylate/potassium methylate and sodium ethoxide/potassium ethoxide are taken as catalysts, the conjugated linoleic acid short-chain alcohol ester and acetoglyceride with mole ratio being 3:1-3.5:1 are reacted for 3-10 hours at 100 DEG C and 170 DEG C to prepare the conjugated linoleic acid glycerides, and the using amount of the catalysts is 0.8-10% of the weight of acetoglyceride. According to the preparation method, the natural resources are utilized sufficiently, an organic solvent is not needed in the main reaction; the esterification rate of conjugated oil acid is more than 99%; the reaction time is short, and the postprocessing simple; the triglyceride content of the conjugated linoleic acid glycerides is more than 90%, and the acid value of the conjugated linoleic acid glycerides is under 1.0mgKOH/g; and the conjugated linoleic acid glycerides is free from extraneous odor, good in taste and light in color, and the optimal Gar is less than or equal to 1.0.

The invention discloses a fishy flavor agent for a feed and a preparation method of the fishy flavor agent. The fishy flavor agent contains the following perfume materials in percentage by weight: 0.5-2% of glycine betaine, 1-3% of trimethylamine, 0.1-2% of 2-methyl-3-sulfydrylfuran, 0.1-1% of pyrrolidine, 0.1-1% of piperidine, 0.1-2% of phenylethylamine, 0.01-1% of 2-acetylpyridine, 0.1-1% of furanone, 1-3% of ethyl maltol, 1-3% of 2-acetylpyrazine, 1-3% of 2,3,5-trimethylpyrazine, 0.01-2% of 3-methylthiopropanal, 30-70% of fishy smell reactants and 10-60% of glycerol triacetate. The fishy flavor agent is prepared by carrying out enzymolysis on animal wastes, then adding reducing sugars to carry out Maillard reaction, and then, adding artificial synthetic essence to blend. The fishy flavor agent has the advantages that the animal wastes are reasonably utilized, the preparation process is simple, and the product is strong in fragrance, stable and easy to store.

The invention discloses sodium silicate-bonded sand for casting and a hardening method thereof, and relates to the technical fields of casting modeling technology and sodium silicate modification. Thesodium silicate-bonded sand for casting comprises the following components: crude sand, sodium silicate, a hardening accelerator and/or a modifier and/or ester, wherein the hardening accelerator is one or more of salt, acid and alcohol; the modifier is one or more of phosphate, aluminate and a hydrophobic agent; and the ester comprises one or more of organic acid ester such as glyceryl diacetate,glyceryl triacetate, glyceryl acetate and the like as well as inorganic acid ester such as dimethyl carbonate, propylene carbonate, glycerol carbonate and the like. By adding the hardening accelerator and the modifier, the amount of the sodium silicate added is reduced, the hardening speed of the sodium silicate-bonded sand is accelerated, the sand mold moisture resistance is improved, and the sand mold collapsibility is improved.

The invention provides a preparation method of a biological binary composite adsorbent in a glycerol triacetate refinement process, and aims at overcoming the deficiencies of relatively poor selectivity, easiness in saturation, non-ideal subsequent refinement effect, high use cost and the like due to adoption of single active carbon as an adsorbent for removing residual organic matters in a subsequent process of glycerol triacetate in the prior art. According to the method, the surface of active carbon is grafted and coated with cyclodextrin, so that the content of oxygen-containing groups on the surface of active carbon is increased, the characteristics of active carbon are added, and active carbon can form an inclusion compound and a molecular assembly system together with a large quantity of organic and inorganic molecules under the Van der Waals' force, the hydrophobic interaction force, the effect of matching between molecules of subjective and objective bodies and the like; the enveloping effect of selective combination is commonly known as the molecular identification, and finally a high-efficiency elution effect is achieved.

The invention discloses a cigarette filter rod loaded with nano chitosan. The cigarette filter rod is characterized in that the cigarette filter rod can effectively reduce the content of lead, cadmium, nickel, arsenic, chromium, selenium and other heavy metal in the smoke of a cigarette, and the reducing effect on the three kinds of heavy metal of the lead, the nickel and the selenium is especially obvious. A preparation method of the cigarette filter rod loaded with the nano chitosan is characterized in that firstly, the nano chitosan is scattered into filter rod plasticizer glycerol triacetate, nano chitosan/glycerol triacetate dispersion liquid is formed, and then in the forming process of the filter rod, the dispersion liquid is used as filter plasticizer to be sprayed on a cellulose acetate tow to form the filter rod. The nano chitosan carried by the glycerol triacetate is evenly sprayed on the cellulose acetate tow.

The invention relates to an organic/inorganic composition for consolidating quicksand and a preparation method thereof. The organic/inorganic composition comprises the following components: a component A, which comprises hydroxyethyl acrylate, acrylamide, N,N-methylene bisacrylamide, triethanolamine, glycerol triacetate and water; and a component B, which comprises water glass, an initiator, water and an emulsifier. The preparation method comprises the following steps: preparation of a composition A: dissolving acrylamide and N,N-methylene bisacrylamide into water, adding hydroxyethyl acrylate, triethanolamine and glycerol triacetate into the water after acrylamide and N,N-methylene bisacrylamide are completely dissolved, and uniformly stirring to obtain the composition A; preparation of the composition B: dissolving an initiator and an emulsifier in water to form a mixture dissolving solution, and adding the mixture dissolving solution into water glass to obtain the composition B; and mixing the composition A and the composition B through a grouting machine at the temperature of 10-25 DEG C and then injecting into quicksand. The mixture solution is forcibly diffused, permeated, reacted and solidified, and then the quicksand can be consolidated. The composition is nontoxic or is low in toxicity.

The invention belongs to the technical field of cement grinding aid preparation, and particularly relates to a method for preparing a cement grinding aid from a leachate. The method comprises the following steps: S1, adding activated carbon into the landfill leachate, adsorbing peculiar smell in the landfill leachate, decolorizing at the same time, and filtering the activated carbon through a filter screen after no peculiar smell exists in the landfill leachate; S2, adding a treating agent into the landfill leachate, stirring to form a flocculation precipitate, and filtering the flocculation precipitate; S3, adjusting the pH value of the landfill leachate to 9-11 to obtain a modified landfill leachate; and S4, adding the modified landfill leachate, triethanolamine, glycerol triacetate, propylene glycol, triisopropanolamine, sodium silicate and molasses into water, and stirring and mixing to obtain the cement grinding aid. The landfill leachate is used as a main raw material to replace heavy alcohol in the cement grinding aid, and the addition amount of the heavy alcohol is reduced, so that the cost of the cement grinding aid is greatly reduced.

The invention belongs to the technical field of curing agents, and particularly relates to a method for preparing a water glass self-hardening sand curing agent from glycerol diacetate. A stirring tank used in the method comprises a tank body, a feeding hole in the upper portion of the tank body and a discharging hole in the lower portion of the tank body, wherein a motor is fixedly arranged in the middle of the upper end of the tank body, the output end of the motor is in transmission connection with a first rotating shaft, the first rotating shaft penetrates through the upper end of the tank body, extends into the inner cavity of the tank body and is rotationally connected with the bottom of the inner cavity of the tank body, and a plurality of groups of crankshafts are arranged on the first rotating shaft at intervals. Through the arrangement of the crankshaft, the connecting rod and the hydraulic cylinder, materials flowing in a rotating mode in the tank body can be disturbed, impact dispersion is achieved, the stirring effect is improved, the materials on the inner layer and the outer layer of the tank body are moved to the inner side, and mixing of the materials on the inner layer and the outer layer is accelerated, so that the materials are mixed more sufficiently and are better in uniformity.

The invention relates to chitosan, in particular to a chitosan solution resistant to irradiation degradation and an irradiation sterilization method thereof, and belongs to the technical field of biological material processing. The invention discloses a chitosan solution resistant to irradiation degradation, and the solution is characterized in that the solution comprises the following components in percentage by mass: 0.5%-2% of chitosan, 0.25%-1% of glacial acetic acid, 4%-6% of glycerol, 3%-4% of n-butyl alcohol, 0.6%-1% of propylene glycol, and the balance of water. The glycerol, the n-butyl alcohol and the propylene glycol are added into the chitosan solution, so the degradation of chitosan in the irradiation process of the chitosan solution can be reduced, the stability of the chitosan solution is improved, and the film-forming and bacterium-blocking effects of the chitosan solution are improved.

The invention relates to a simple preparation method of honeycomb porous carbon with a high specific surface area. The preparation method comprises the following steps: mixing zinc acetate with glycerol for reaction to obtain an organic complex containing glycerol acetate and zinc glyceroxide; and calcining and cracking the organic complex precipitate containing glycerol acetate and glycerozinc athigh temperature to remove the soft template glycerol acetate, cleaning with dilute acid to remove zinc oxide, and collecting to obtain the honeycomb porous carbon. The method is novel in thought andsimple and convenient to operate, the preparation of the honeycomb porous carbon with the high specific surface area is controllably prepared by an in-situ dual-template strategy through a simple one-step method, and the obtained porous carbon is high in specific surface area and relatively uniform in pore structure.

The invention discloses an energy-saving and environment-friendly furan resin casting alcohol-based curing agent which is different from a sulfonic acid curing agent, and methanol, sulfuric acid, propylene carbonate and glycerol acetate are adopted in the preparation process. Higher environmental protection standards can be reached in actual production and application, the curing effect of the furan resin casting adhesive is better, the amount of waste water is reduced, and the body health of workers is effectively protected. The curing agent well solves the problems that an existing sulfonic acid curing agent is long in preparation time, a large amount of waste water is generated, benzene substance residues exist, and the production efficiency and the environment-friendly requirement are not ideal.

The invention discloses a tobacco essence extraction or preparation method which comprises the following steps: S1, crushing tobacco, and putting the crushed tobacco into an extraction container; S2, adding ethanol into the crushed tobacco obtained in the step S1 for extraction; S3, performing precipitating and filtering to obtain a first extracting solution and a first solid substance; S4, adding glycerol triacetate into the first solid matter in the step S3 for a reaction; S5, performing precipitating and filtering to obtain a second extracting solution and a second solid substance; S6, adding diethyl ether into the second solid matter in the step S5 for a reaction; S7, performing precipitating and filtering to obtain a third extracting solution; S8, mixing the first extracting solution, the second extracting solution and the third extracting solution; and S9, performing vacuum compression to obtain the tobacco essence. According to the method, through multiple times of extraction, the spices in the tobacco can be fully extracted, the extraction rate is high, and the process is easy to operate.