78results about How to "Lower distillation temperature" patented technology

The present invention relates to a method for preparing an organic compound, in particular to a method for preparing an organic phosphate nucleator, which includes the following steps: phosphorylation reaction, hydrolyzation and salification. Since the solvent for the phosphorylation reaction adopts halogenated hydrocarbon instead of benzene series compounds, which is cheap, the cost can be reduced, and since the yield of the organic phosphate synthesized with the halogenated hydrocarbon used as the solvent is higher, the yield of the final product, the organic phosphate, is greatly increased. Moreover, since the solvent does not adopt the benzene series compounds, toxicity is low, non-burning operation is safe, environment can be protected, recycling is convenient, and the diaryl-substituted organophosphate metal salt used as nucleator prepared by the method has obvious effect in the improvement of the processing property of resin.

The invention discloses an extraction method of navel orange peel essential oil. The extraction method comprises the following steps: (1) preparation of crude navel orange peel essential oil: crushing navel orange peels, mixing with water, carrying out enzymolysis by virtue of compound enzyme formed by pectinase and cellulase so as to obtain enzymolysis mixed liquid, carrying out enzyme deactivation on the enzymolysis mixed liquid, extracting essential oil by virtue of microwave-assisted supercritical CO2 fluid extracting instrument, injecting extracting liquid into a separator to separate CO2, and rectifying a separated product, so as to obtain the crude navel orange peel essential oil; and (2) terpene removal treatment of the crude navel orange peel essential oil: putting the crude navel orange peel essential oil obtained in the step (1) into a reaction kettle of a molecular distillation instrument, carrying out molecular distillation, and collecting a distillation residue, so as to obtain the navel orange peel essential oil. The extraction method of the navel orange peel essential oil has the advantages of rapidness, high efficiency, yield and essential oil content, stable quality and the like.

The invention discloses extraction equipment for fragrant plant essential oil and headspace volatile. The extraction equipment comprises an alembic, a condenser I, an oil-water separator, an adsorber, a liquid pump and a rectifying tower, wherein a material steaming basket is arranged inside the alembic; the condenser I is connected with the alembic; the oil-water separator is connected with a liquid delivery pipe at the bottom of the condenser I; the adsorber is connected with the top of the condenser I; the bottom of the adsorber is connected with a headspace volatile elution gathering tank; the top of the headspace volatile elution gathering tank is connected with a vacuum system and the top of an organic solvent gathering tank; a feed port of the liquid pump is connected with a discharge port of the headspace volatile elution gathering tank through a valve; a discharge port of the liquid pump is connected with a feed port of the rectifying tower and the top of the adsorber by valves. The extraction equipment disclosed by the invention not only can well recycle the headspace volatile, but also has the advantages of high oil extraction rate, low energy dissipation, simple operation, low equipment cost and the like, the extraction equipment can easily realize industrialized production, has very good social and economical benefit.

The invention discloses a method for preparing lactide by a catalytic method under reduced pressure, which is characterized by comprising the following steps: firstly, removing free water in lactic acid at a temperature is 75-90 DEG C and at a vacuum degree of 0.080-0.090 MPa for 1-2 hours; secondly, adding a catalyst and a surfactant, wherein the catalyst consists of zinc oxide with a reactant mass percentage of 0.5-1 percent and stannous octoate with a reactant volume ratio of 0.5-1 percent, the surfactant is Tween 80 with a reactant volume ratio of 0.5-1 percent or sodium dodecyl sulfate with a reactant mass percentage of 0.5-1 percent ; thirdly, at a vacuum degree of 0.080-0.090 MPa and a temperature of 125-135 DEG C, removing combined water and reacting for 5 hours; and fourthly, agitating and raising the temperature to 165-200 DEG C, distilling and collecting the lactide with a crude production rate of 83-91 percent. The method has the beneficial effects that the distillation temperature of the lactide in the lactide preparation process can be reduced, the energy consumption is reduced, the by-product quantity generated at high temperature is reduced, the preparation production rate of the lactide is further improved, and the production cost is reduced.

The invention discloses a navel orange peel essential oil extracting method, which comprises the following steps: (1) crude navel orange peel essential oil preparation: smashing navel orange peel, putting into an extraction kettle of a microwave-ultrasonic wave synergistic extractor, adding an extracting solvent to perform microwave-ultrasonic wave synergistic extraction, filtering extract liquor and rectifying filtrate to obtain crude navel orange peel essential oil; (2) terpene removing treatment of the crude navel orange peel essential oil: putting the crude navel orange peel essential oil obtained in the step (1) into a reaction kettle of molecular distillation apparatus, performing molecular distillation and collecting distillation residues to obtain navel orange peel essential oil. The navel orange peel essential oil extracting method has the advantages of quickness, high efficiency, high yield, high essential oil content, stable quality and the like.

The invention relates to an integral disposal process of acid copper chloride etching waste liquid. The integral disposal process comprises the process steps of (1) recovering hydrochloric acid; adding acid etching waste liquid into concentrated sulfuric acid; performing distillation recovery at the pressure of -0.05MPa and the temperature of 80 to 90 DEG C; (2) recovering ammonium sulphate; filtering a concentration solution; cooling filtering liquid to separate out ammonium sulphate crystals; (3) recovering electro deposited copper or copper sulphate; concentrating filter residue after the solution is filtered; selecting the final product according to the market conditions of the electro deposited copper and the copper sulphate in the market; (4) then, recovering ammonium sulphate. The process provided by the invention has the advantages that the operation is flexible; the consumption of alkali is greatly reduced; the production cost is reduced.

The invention relates to a recovery system for reclaimed lubricating distillate oil. The recovery system comprises a primarily processing system, an atmospheric distillation system and a reduced pressure distillation system, wherein the primarily processing system comprises a stirring kettle and filter pressing equipment; the atmospheric distillation system comprises an atmospheric distillation still, an atmospheric condenser and a low-boiling point distillate oil temporary storage tank; the reduced pressure distillation system comprises a reduced pressure distillation still, a molten salt furnace pipe, a reduced pressure condenser, a vacuum pump, a liquid seal device and a distillate oil temporary storage tank; the reduced pressure distillation still is communicated with the atmospheric distillation still through a pipeline; the molten salt furnace pipe is arranged in the reduced pressure distillation still; the reduced pressure condenser is arranged above the reduced pressure distillation still; the vacuum pump is connected with the reduced pressure condenser; the liquid seal device is arranged below the reduced pressure condenser; and the distillate oil temporary storage tank is arranged below the liquid seal device. The invention also relates to a recovery processing method for the reclaimed lubricating distillate oil. Due to the adoption of the recovery system and the recovery processing method, the reclaimed lubricating distillate oil has good color, high purity, high recovery utilization ratio and safe and convenient operation and can replace basic lubricating oil.

The invention discloses a Melaleuca alternifolia cheel essential oil extracting method and relates to the field of tea tree essential oil producing and processing. The method comprises the following steps that raw materials are collected; impunity removal and drying are conducted; smashing is conducted; an organic solvent is added after ultrasonic treatment; distillation is conducted; cooling is conducted; oil water separation is conducted to obtain the tea tree essential oil. The tea tree essential oil has the advantages of being high in purity, free of residual toxic and harmful solvents, simple in technology, and suitable for mass production and utilization.

The invention relates to a resin short path distiller and a resin distillation process. The distiller comprises a feed opening 1, a resin liquid distribution ring 2, a molecule evaporation surface 3, a turpentine tray 4 and an outlet 5, a rosin outlet 6, a heating jacket 8, a molecule evaporation tube consisting of a vacuum interface 10 and a flange 11, and a molecule cooler consisting of a waterinlet 12, a water outlet 13, a tooth-shaped corrugated molecule cooling surface 14, a flange 15 and a seal bottom. The evaporation surface is preheated to 130DEG C to 140DEG C, and vacuumized to 50Pato 100Pa; after cooling liquid is injected into the cooler, the pre-heated resin liquid is put into the resin liquid distribution ring; the resin liquid is distributed into a liquid membrane which flows downwards along the molecule evaporation surface and is heated by the evaporation surface, so that molecule distillation is carried out; turpentine molecules escape from the liquid surface and arecooled by the molecule cooling surface into turpentine which flows down to the tray and flows into a storage tank P1 from the outlet 5; and the rest rosin of the liquid membrane flows into a storage tank P2 from the outlet, and the distillation process lasts for 10s to 15s. The resin distillation process provided by the invention is simple and easy to operate, saves above 70 percents of heat compared with a distillation process, so that the color of the rosin is lighter.

The invention relates to a negative-pressure ammonia distillation tower and an ammonia distillation method. The negative-pressure ammonia distillation tower comprises a tower main body, a skirt, a tar outlet, a manhole, an ammonia distillation wastewater outlet, a conduction oil inlet, a conduction oil outlet, a reboiler, a full-flow baffle plate, a communicating pipe, a tray, an alkali liquor inlet, a raw material ammonia water inlet, an ammonia dephlegmator, a cooling water inlet, a cooling water outlet and an ammonia vapor outlet. The negative-pressure ammonia distillation tower is characterized in that the reboiler is arranged in the tower main body, the ammonia dephlegmator is arranged at the upper part of the tower main body, the raw material ammonia water inlet is located at the upper part of the tower main body, the alkali liquor inlet is located at the middle part of the tower main body, ammonia distillation wastewater in the downcommer of the bottommost tray is guided into the bottom layer of the tower by use of the communicating pipe, and the full-flow baffle plate is arranged at the bottom layer of the tower main body. The negative-pressure ammonia distillation tower has the advantages that the ammonia distillation tower works under negative pressure so that the solution boiling point is low and the distillation temperature can be reduced, and therefore, the energy consumption is reduced, besides, the anticorrosion process is optimized, the medium corrosion problem is solved and the material cost is saved, and furthermore, the reboiler is integrated in the ammonia distillation tower so that the ammonia distillation process can be simplified and the loss in the process can be reduced.

The invention discloses a vacuum distillation device for precision part cleaning liquid. A heating jacket is fixed at the outer side of the lower part of a distillation retort; an entrance of the heating jacket is connected with an exit of a heat conduction oil circulation pump by means of a pipeline; an entrance of the heat conduction oil circulation pump is connected with an exit of a heat conduction oil heater by means of a pipeline; an entrance of the heat conduction oil heater is connected with an exit of the heating jacket by means of a pipeline; a gas outlet of the distillation retort is connected with an entrance of a condenser by means of a communicating pipe; a bottom liquid outlet of the condenser is connected with a cleaning liquid storage tank; a vacuum pipe is installed on the side wall of the upper part of the cleaning liquid storage tank; a liquid inlet of the distillation retort is connected with an outlet of a filter by means of a pipeline; an inlet of the filter is connected with a cleaning liquid inlet pipe; a bottom residue outlet pipe of the distillation retort is connected with an entrance of a residue tank. The vacuum distillation device for the precision part cleaning liquid has the advantages of being clean, environmentally friendly and good in safety, and can effectively improve the economic benefit of an enterprise.

The invention provides a synthesis method of isoeugenol. The method comprises the following steps: adding ground cloves powder to a potassium hydroxide solution which is 1mol/L in concentration and ethanol, and keeping under an ultrasonic condition at 100-130 DEG C for 1-2 hours to obtain a decomposition solution; stirring and mixing the decomposition solution with methylbenzene, heating and distilling under a vacuum state, controlling distilling and heating temperature at 50-90 DEG C, controlling temperature of a distillation gas volatilization outlet at 35-45 DEG C, and condensing and collecting distillation gas through a condenser to obtain low boiling point impurities; continuing to distill rest filtrate after removing the low boiling point impurities, controlling distilling and heating temperature at 100-120 DEG C, controlling temperature of the distillation gas volatilization outlet at 90-105 DEG C, and condensing and collecting the distillation gas through the condenser to obtain the isoeugenol. The synthesis method disclosed by the invention is light in environmental pollution, more simple to operate and quite low in production cost; moreover, content of trans-isoeugenol can achieve more than 95% in the isoeugenol.

The invention provides a production process of tricyclazole, and belongs to the field of pesticide production. The method solves the problems that the utilization rate of formic acid is low in the prior art; the production process of tricyclazole comprises the following steps of S01, putting 30-35% of reaction formic acid into 4-methyl-2-hydrazino benzothiazole, heating to 105-110 DEG C and performing reflux reaction for 2-5h; and S02, after reflux reaction is ended, carrying out reduced pressure distillation, evaporating out and recovering formic acid, wherein the temperature of reduced pressure distillation is 130-160 DEG C; dropwise adding water into the reduced pressure distillation residue, wherein the dropwise adding speed is 30 drops/min to 60 drops/min; carrying out cooling and crystallizing after dropping, wherein the temperature of the cooling crystallization is minus 10 DEG C to 40 DEG C; performing filtering, and then drying on filter cake obtained by filtering at 50-100 DEG C to obtain a tricyrazole crude product; and carrying out refining on the tricyrazole crude product obtained in the step S02 by an ethyl acetate-ethyl alcohol mixed solvent to obtain refined tricyclazole. The method disclosed by the invention is high in yield of the tricyclazole.

The invention relates to a preparation method and applications of an agilawood-type tobacco essence. The preparation method comprises following steps: agilawood is crushed, and is subjected to ethanoldissolving, ultrasonic cell crushing, heat backflow extraction, filtering, reduced pressure concentration, and molecular distillation; wherein in the step of molecular distillation, three stage fractionation is adopted to prepare two kinds of agilawood essence oil including a second stage separated product agilawood essence oil and a third stage separated product agilawood essence oil. The agilawood-type tobacco essence comprises 0.1 to 3 parts of the second stage separated product agilawood essence oil, 2 to 7 parts of the third stage separated product agilawood essence oil, 0.05 to 3 partsof cedar oil, 1 to 10 parts of tobacco extract, 35 to 60 parts of ethanol, and 35 to 45 parts of propylene glycol. The cigarette product containing the agilawood-type tobacco essence possesses elegantagilawood fragrance, is mellow and thick in flavor, sweet aroma is enhanced, and throat comfortableness is improved.

The invention relates to the technical field of glycolic acid purification, and discloses a glycolic acid purification method, a glycolic acid crystal and application thereof. The method comprises the following steps of: (1) concentrating a glycollic acid aqueous solution of which the concentration is lower than 70wt% into a 70-90wt% glycollic acid aqueous solution by molecular distillation; and (2) crystallizing the 70-90wt% glycollic acid aqueous solution obtained in the step (1), and carrying out solid-liquid separation to obtain a glycollic acid crystal and a glycollic acid mother solution. The purity of the glycollic acid crystal obtained by the method provided by the invention is as high as 99.9 wt%, and the polymer content is less than 0.1 wt%. The glycollic acid crystal obtained by the method is applied to the fields of organic synthesis, medicines and cosmetics.

The invention relates to the field of preparation of high-purity hexachlorodisilane, in particular to a process for preparing high-purity hexachlorodisilane. According to the method, sorbitol is adopted to replace chelate resin to adsorb metal impurities, nitrogen is added in the purification process for accompanying as inert gas for protection and rectification, the introduced nitrogen mainly hasthe effects of reducing the distillation temperature and enhancing stirring of liquid in the tower kettle to prevent local overheating of the liquid in the kettle, therefore hexachlorodisilane is prevented from being heated to deteriorate. The process is high in rectification efficiency and low in process cost.

The invention discloses biological diesel fuel polymolecular distillation process, comprising the following steps: putting the biological diesel fuel into first grade molecular distillation device, evaporating water and air, putting the distillate into container, then putting the materials without being distilled into second grade distillation device; the putting the materials into container; putting the material without being distilled into gathering tank, or putting them into next grade distillation device; after n grades distilling, putting the valid combination into container, and putting the refuse into gathering tank. The distillation number of steps is between 2 and 6.