111 results about "Alpha-terpineol" patented technology

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention discloses a terpilenol production reaction kettle with an alarm function, and relates to the technical field of alarm devices. The terpilenol production reaction kettle with the alarm function comprises a reaction kettle body and a temperature control alarm device. According to the terpilenol production reaction kettle with the alarm function, stirring blades can rotate along a rotating pipe in a reciprocating mode while rotating along with a rotating shaft, the stirring efficiency can be higher, the stirring effect can be better, a temperature sensor can rotate along with the stirring blades and move up and down, and the temperature sensor is more stable. The detection of the raw material temperature is more accurate and reliable; when the temperature of the materials is detected to be too high, an alarm can be given in time through the alarm, cooling liquid can enter the stirring blades to be rapidly cooled, and when subsequent materials are produced, the cooling liquid absorbing heat can be used for preheating the materials, so that waste heat can be recycled, and more energy conservation and environmental protection are achieved.

The invention discloses an attractant for citrus fruit flies, wherein the components thereof are as follows by mass percentage: (a) d-limonene content is 20-40%; (b) geranyl acetate content is 20-40%; (c) α-terpineol content is 20-40%; and (d) tert-butylphenol content is 5-20%. By using the invention, adult citrus fruit flies in a surrounding area of ​​about 1.5 mu can be lured and killed, large-scale spraying of chemical pesticides can be reduced, and the monitoring and prevention and control effects of citrus fruit flies can be significantly enhanced.

The invention discloses a low-rank coal composite flotation reagent and a preparation method and application thereof, and belongs to the technical field of coal flotation of mineral processing. The agent specifically comprises a composite collecting agent and a composite foaming agent, and the composite collecting agent comprises kerosene, n-dodecane, oleic acid, dimer acid, sodium stearate, terpilenol, diethyl phthalate, alkylphenol ethoxylates, span-80, trioctyl phosphate and 2-ethylhexanol. The composite foaming agent is prepared from the following components: terpilenol, terpenic oil, sec-octyl alcohol and sodium alpha-olefin sulfonate. Compared with a traditional single flotation reagent combination, the composite flotation reagent has a remarkable effect in fine coal flotation, and particularly when coal with the particle size smaller than 0.5 mm is treated, the flotation efficiency, the clean coal yield and the combustible body recovery rate can be effectively improved. More importantly, the medicament is stable at normal temperature, the layering phenomenon is avoided, the long-term effectiveness is ensured, and the medicament has extremely high industrial application potential.

The invention provides an essence with a jasmine tea flavor. Comprising leaf alcohol, linalool, phenethyl alcohol, alpha-amyl cinnamic aldehyde, hexanal, benzyl acetate, jasmine absolute oil, neroli oil, leaf alcohol acetate, indole, geraniol, geranyl acetate, linalyl acetate, methyl dihydrojasmonate, farnerol, alpha terpilenol, damascenone B, ionone B, benzyl acetate, benzyl alcohol, leaf alcohol benzoate and ethyl maltol. The compound is one or more of methyl anthranilate, methyl benzoate and methyl salicylate. The jasmine tea beverage food added with the jasmine tea flavor essence disclosed by the invention can effectively modify and improve the flavor of the jasmine tea beverage, increase the tea fragrance and flower fragrance of the jasmine tea beverage, and enable the fragrance and taste to be richer and fuller.

The invention provides a method for regulating and controlling aroma of grape fruits through an exogenous plant growth regulator, which comprises the following steps of: spraying three exogenous plant hormones, namely methyl jasmonate, phenylalanine and strigolactones, on 'Hanxiangmi' grape fruits with strong rose aroma, and analyzing the aroma composition and content of the treated grape fruits. The result shows that the rose fragrance intensity of the'Hanxiangmi 'grapes is enhanced after the jasmonic acid methyl ester treatment; after strigolactones treatment, components such as alpha-terpilenol, beta-ionone, nonanoic acid, geraniol and the like in grape fruits are prominent, so that the treated grapes are converted into mixed fragrance type grapes with flower fragrance, fruit fragrance and grass fragrance, and the fragrance layers are rich; and the treatment effect of phenylalanine is not obvious. The invention provides a reference for the research of strigolactone in fruit quality.

The invention discloses a high-stability MEMS hydrogen sensor and a preparation method thereof. The high-stability MEMS hydrogen sensor is a semiconductor resistance type hydrogen sensor based on a metal oxide gas sensitive coating and sequentially comprises a silicon nitride supporting layer, a Pt / Ti heating electrode, a sensing electrode, a silicon nitride isolating layer and a metal oxide gas sensitive film from bottom to top. The metal oxides are high-purity antimony doped tin dioxide, tetraamino palladium nitrate and tetraammineplatinum nitrate. The preparation method comprises the following steps: mixing high-purity antimony-doped tin dioxide powder, tetraamino palladium nitrate powder and tetraammineplatinum nitrate powder, preparing gas-sensitive slurry from a mixed solution of terpilenol, diethylene glycol butyl ether acetate, ethyl cellulose, dibutyl phthalate and dioctyl phthalate, dispensing the gas-sensitive slurry on a central interdigital electrode area of an MEMS chip, and performing vacuum drying to obtain the gas-sensitive MEMS chip. And performing vacuum standing and slow heating to obtain the sensor. The sensor is low in detection lower limit and stable in resolution ratio after high-humidity aging.

The invention discloses a green production process for synthesizing 1, 8-terpineol and preparing perfume-grade terpilenol by dehydrating the 1, 8-terpineol, which comprises the steps of hydration reaction, centrifugal separation, acid water recovery, by-product recovery, dehydration reaction and secondary distillation. Wherein the turpentine hydration reaction conditions are as follows: a catalyst is composed of alpha-hydroxy acid and phosphoric acid or boric acid, intermittent stirring is performed at room temperature, the reaction is performed for 2-15 days, an IBC ton barrel can be adopted as a reaction tank, and the mass yield of terpin hydrate is greater than 100%. Citric acid or tartaric acid is adopted to catalyze the dehydration reaction of terpineol hydrate, and the selectivity of terpineol can reach 91% or above. Compared with a traditional process, the method has the advantages that the catalyst is low in corrosivity and does not need an enamel reaction kettle; the reaction is carried out at room temperature, and no cooling equipment is needed; centrifuging to obtain terpin hydrate crystals without alkali neutralization; acid water is easy to recycle, and almost no wastewater is discharged; an IBC barrel is used as a reactor, so that the equipment investment is low.

The invention belongs to the technical field of slurry, and relates to application of beryllium oxide in slurry development. The invention provides application of beryllium oxide in slurry development, the slurry comprises glass powder and a carrier, and a preparation method of the carrier comprises the following steps: mixing beryllium oxide and an additive according to a mass ratio of 1: (1.5-2), and blending in a mixer for 2-6 hours to obtain the carrier; the additive is prepared from polyamide, isooctyl alcohol, polydimethylsiloxane and terpilenol. Due to the interaction and synergistic effect of the components, the slurry can still keep stable performance under extreme conditions, and can resist corrosion of corrosive substances, so that the stability and reliability of electronic devices are improved.

The present invention discloses a fermentation method for Antrodia camphorata mycelium and an auxiliary composition for fermentation of Antrodia camphorata. The method provided by the present invention comprises the following steps: S1. subjecting an Antrodia camphorata strain to liquid fermentation for 60-120 hours; S2. adding precursors to the fermented Antrodia camphorata strain liquid fermentation broth, and continuing the fermentation for more than 120 hours to obtain Antrodia camphorata mycelium; the precursors being coenzyme Q0, p-hydroxybenzoic acid, linalool, and α-terpineol, and the fermentation broth after adding the precursors having a coenzyme Q0 content of 100-500 mg / L, a p-hydroxybenzoic acid content of 20-300 mg / L, a linalool content of 0.1-0.5 mg / L, and an α-terpineol content of 0.3-0.7 mg / L. This method adds precursor substances of specific composition and concentration to the liquid fermentation broth of Antrodia cinnamomea at a certain time and combines them with each other, which is beneficial to the secondary metabolism of Antrodia cinnamomea and promotes the synthesis of triterpenoid compounds, thereby increasing the yield. Compared with the existing technology, the yield of triterpenoid compounds produced by Antrodia cinnamomea mycelium is increased, the culture cycle is shortened, and it is more suitable for large-scale production.

The application discloses a preparation method of a low-TCR low-cost ceramic heating tube, and comprises the following steps: (1) preparing an organic carrier: 60 parts by weight of terpineol, 20 parts by weight of ethyl cellulose, 10 parts by weight of a binder and 10 parts by weight of diethylene glycol acetate are placed into a magnetic stirrer and uniformly dissolved and mixed; (2) weighing metal powder: Mo: 50-70 parts by weight; Re: 20-30 parts by weight; Mn: 0-5 parts by weight; Cr: 10-15 parts by weight; by adopting Mo, Re, Mn and Cr in a specific ratio as the metal powder, the traditional mode of adopting metal ruthenium powder or a mixture of metal ruthenium powder and other common metal powder is replaced, the prices of Mo, Re, Mn and Cr are low, so that the preparation cost of the ceramic heating tube is effectively reduced, the purpose of low TCR is achieved, and the scale production is facilitated; meanwhile, the ceramic heating tube prepared by adopting the application has higher overall bending strength, and can better meet the use requirement.

The invention relates to the technical field of non-ferrous metal beneficiation, in particular to a flotation reagent composition for recycling micro-fine particle copper sulfide from copper oxide acid leaching residues and a beneficiation method of the flotation reagent composition. The flotation reagent composition for recovering copper sulfide from copper oxide acid leaching residues is characterized by comprising a collecting agent, a hydrophobic agglomeration agent and a foaming agent, and the collecting agent is ethyl thioacetate; the hydrophobic agglomeration agent is prepared from octadecyl triethoxy silane and kerosene; and the foaming agent is selected from terpilenol, methyl isobutyl carbinol or sec-octanol. The ethyl thioacetate serving as a collecting agent is stable in chemical property in an acid environment, weak in gangue mineral collecting capacity and good in selectivity in the copper sulfide mineral flotation process, and therefore the grade and the recovery rate of obtained copper sulfide concentrate are higher.

The invention discloses a sealing glass film and a preparation method and application thereof. The preparation method comprises the following steps: mixing polyvinyl butyral and ethanol and ball milling them to obtain a mixed slurry; pouring the mixed slurry into a tape casting machine; preparing a layer of PVB film on a PET release film tape; mixing glass powder, a dispersant and a solvent and ball milling them; the solvent is one or more of terpineol, diethylene glycol monobutyl ether and alcohol ester twelve; when D 50 =10μm-12μm, add a binder and a plasticizer, ball mill, vacuum degassing, obtain a casting slurry, cast the casting slurry on a PET release film with a PVB film, dry and demold, and obtain a sealing glass film. The preparation method of the invention has simple process and strong universality. The prepared sealing glass film can achieve high-strength sealing of ceramic parts, has good airtightness, and is easy to store.

The invention discloses a novel organic carrier for photovoltaic silver paste, the novel organic carrier comprises a solid substance and a solvent, the solid substance accounts for 10-40% of the total mass of the organic carrier, the solvent accounts for 60-90% of the organic carrier, the solid substance comprises polymethyl ethylene carbonate and ethyl cellulose, and the solvent accounts for 10-30% of the total mass of the organic carrier. The solvent comprises one or more of terpilenol, butyl carbitol and ethylene glycol butyl ether acetate. Compared with the prior art, the organic carrier can achieve high fine line resolution and good printing screen passing performance, after high-temperature rapid sintering, the residual carbon content is extremely low and is in the ppm level, and great benefits are brought to the performance of the photovoltaic silver paste.

1. The name of the design product: packaging box (4-terpineol eye pad). 2. The use of the design product: packaging box for packaging eye pad. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.

The application discloses a hole transport layer precursor solution, a battery component and a preparation method thereof, a perovskite solar cell and an electric device, and belongs to the technical field of solar cells. The hole transport layer precursor solution comprises a self-assembled monolayer material and a composite solvent; the composite solvent comprises a phosphate ester solvent, an alcohol ether solvent, an alcohol solvent and a terpineol; the boiling point of the phosphate ester solvent is 190 DEG C-240 DEG C; the boiling point of the alcohol ether solvent is 210 DEG C-250 DEG C; and the boiling point of the alcohol solvent is 70 DEG C-90 DEG C. The hole transport layer precursor solution has improved stability and storability, improves the flexibility of a production process of a perovskite component prepared by the hole transport layer precursor solution, improves the batch stability and efficiency of the perovskite component, and meets the demand of large-area processing.

The invention provides a super-hydrophobic emulsion, a super-hydrophobic self-cleaning coating, a preparation method of the super-hydrophobic emulsion and the super-hydrophobic self-cleaning coating and an insulator composite structure. The preparation method of the super-hydrophobic emulsion comprises the following steps: uniformly mixing an HPMC solution, terpilenol and a SiO2 dispersion liquid to obtain the super-hydrophobic emulsion, wherein the mass ratio of the HPMC to the terpilenol to the SiO2 is (3-7): (60-90): (20-90). The silicon dioxide super-hydrophobic coating is prepared by adopting an efficient fluoride-free method, so that anti-icing application of the surface of a power transmission line insulator is facilitated. The water contact angle of the coating can reach 161 degrees, the sliding angle is smaller than 1 degree, in an anti-icing performance test, the freezing starting time of liquid drops is effectively delayed compared with that of a common surface, and the surface icing amount of the super-hydrophobic coating is reduced by 53.6% compared with that of the common surface. The coating provided by the invention has good corrosion resistance and low temperature resistance, has good anti-icing performance when being applied to the surface of the insulator, and can keep a stable structure.

The present invention relates to the use of citrus volatiles to repel the Pardosa pseudoannulata, and belongs to the technical field of spider repellents. The present invention provides the use of citrus volatiles to repel the Pardosa pseudoannulata. Based on this use, the present invention also provides the use of citrus volatiles to prepare a Pardosa pseudoannulata repellent, the use of the citrus volatile α-terpineol to repel the Pardosa pseudoannulata, and the use of the citrus volatile α-terpineol to prepare a Pardosa pseudoannulata repellent. The present invention utilizes α-terpineol, which has a repellent effect on the Pardosa pseudoannulata, to develop a spider repellent, which has great development potential and is of great significance.

The utility model discloses a fractionating device for preparing dihydroterpilenol, which belongs to the technical field of dihydroterpilenol preparation and comprises a protective box, a gas collecting mechanism is arranged on the side of the protective box, a distillation retort is arranged at the bottom of an inner cavity of the protective box, a sealing cover is sleeved on the top of the distillation retort, a cover lifting column is fixedly connected to the top surface of the sealing cover, and a gas collecting mechanism is arranged on the gas collecting mechanism. The top end of the cover lifting column is movably connected to the top of the protection box in a sleeving mode and fixedly connected with a lifting plate, and two supporting frames are fixedly connected to the side face of the protection box. According to the automatic sealing cover opening and closing device, the supporting frame, the lead screw, the lifting plate, the supporting column, the lifting plate, the cover lifting column and the servo motor are used in cooperation, the lead screw is driven by the servo motor to rotate, the lifting plate and the cover lifting column can drive the sealing cover to move up and down through cooperation between the lead screw and the lifting plate, and therefore the sealing cover can be automatically opened and closed; the convenience of opening and closing the sealing cover is ensured, and the practicability is better.

The application relates to the technical field of ammonia gas sensors, and discloses a preparation method of a laser-induced graphene-based ammonia gas sensor, which adopts the following technical scheme: a preparation method of a laser-induced graphene-based ammonia gas sensor, comprising the following steps: S1, laser direct writing is performed on the surface of a polyimide film through a laser engraving device to form a set of interdigital electrode patterns on the surface of the polyimide film; S2, a gas-sensitive material is prepared, the gas-sensitive material is mixed and ground with terpineol and glass beads, and then the mixed gas-sensitive material is coated on the treated polyimide film; and S3, the polyimide film obtained in the step S2 is aged at 60-70 DEG C to obtain a flexible ammonia gas sensor. The flexible substrate with interdigital electrodes can be prepared in a low-cost manner.

Provided are compositions comprising terpene mixtures consisting of 1000-4500 ppm myrcene, 1000-4000 ppm terpineol, 1000-5500 ppm caryophyllene and 1000-45000 ppm nerolidol; 1000-4500 ppm alpha-pinene, 1000-4000 ppm sabinene, 1000-4000 ppm limonene, 500-4000 ppm borneol and 1000-4500 ppm caryophyllene; 1000-4500 ppm alpha-pinene, 1000-4000 ppm linalool, 1000-4000 ppm terpineol, 1000-4000 ppm borneol, 1000-4500 ppm caryophyllene and 1000-4000 ppm nerolidol; 1000-4000 ppm myrcene, 500-5000 ppm linalool, 1000-4500 ppm caryophyllene and 500-4500 ppm nerolidol; or 1000-5500 ppm alpha-pinene, 1000-4000 ppm limonene, 500-4000 ppm linalool and 1000-4500 ppm caryophyllene, and uses in therapy.

This invention provides an aqueous dewaxing reagent comprising the following components by weight percentage: 0.3-6% surfactant and 0.5-3% composite penetration enhancer, with the balance being water. The composite penetration enhancer is composed of limonene and terpineol, wherein the mass of terpineol is not less than 10% of the total mass of the composite penetration enhancer. The preparation method involves mixing the surfactant, composite penetration enhancer, and water. This invention utilizes a composite penetration enhancer composed of limonene and terpineol, which significantly improves dewaxing speed, reduces temperature dependence, widens the operating temperature window, reduces tissue damage, provides better protection against antigens, and is beneficial for IHC staining.

This invention discloses a low-temperature resistant composite flotation reagent for coal preparation and its preparation method, specifically relating to the field of flotation technology. The reagent is formed by emulsification of a composite collector, a composite frother, and an aqueous phase. The composite collector contains kerosene, n-dodecane, oleic acid, dimer acid, surfactant components, and low-temperature stabilizing components. The composite frother contains terpineol, pine oil, sec-octanol, and sodium α-olefin sulfonate, etc. Through compounding and synergistic effects, high-speed shear emulsification, and high-pressure homogenization, the obtained reagent exhibits good dispersibility and stability at -5 to 15°C, and can improve the flotation efficiency, clean coal yield, and combustible gas recovery rate of fine coal slime and high-ash, difficult-to-separate coal slime without heating the coal slurry.

A reaction device for preparing terpineol from limonene and a synthesis method thereof are provided. The reaction device is provided with an evaporator, a reactor, a condenser, a catalyst basket, a steam riser and a siphon. The evaporator is provided with a raw material inlet and a discharge outlet. The upper portion of the evaporator is connected with the upper portion of the reactor through the steam riser. The condenser is arranged at the top of the reactor. The catalyst basket is arranged in the reactor. The siphon is connected with the reactor and the evaporator respectively. The evaporator is heated. The raw material, water and solvent are evaporated through the steam riser and condensed in the condenser. The condensed liquid is reacted with the catalyst. When the liquid level in the reactor is higher than the height of the siphon, the liquid in the reactor is returned to the evaporator by the pressure difference. The raw material, water and solvent in the evaporator are continuously evaporated and reacted. The process is repeated. After the reaction is completed, the heating is stopped, the discharge outlet is opened, the discharged material is separated by rectification, and terpineol is obtained. The reaction synthesis of terpineol from limonene is easy for subsequent rectification and separation, the reaction time is short, and the process is simple.

The present invention relates to the technical field of deodorant, disclose a kind of plant deodorant and preparation method thereof, its raw material includes 10-20 parts of plant essential oil, 1-3 parts of pinene, 1-3 parts of sabinene, 1-3 parts of linalool, 1-3 parts of myrcene, 1-3 parts of α-terpineol, 5-8 parts of polyethylene glycol monooleate, 2-5 parts of preservative, 5-10 parts of core-shell nano microspheres, 70-80 parts of deionized water by weight; the core-shell nano microspheres are prepared by using nano zinc oxide particles as core layer and trivalent iron ions as shell layer. In the present invention, plant deodorant not only contains active ingredients reacting with odor molecules, but also converts malodorous substances into odorless substances, effectively improves deodorization efficiency, and purifies the environment; and the compounding of plant essential oil and spices makes the fragrance more fresh and natural, and can also improve the persistence of fragrance retention, and achieve the effect of efficient and rapid deodorization.

The invention relates to bacillus velezensis JT-14 with high yield of terpene flavor components as well as a screening method and application of the bacillus velezensis JT-14, and belongs to the technical field of microorganisms and fermentation. The preservation time of the bacillus velezensis JT-14 with high yield of terpene flavor components is June 26, 2025, the preservation unit is Guangdong Microbial Culture Collection Center, and the preservation number is GDMCC 66597. The bacillus velezensis JT-14 screened by the invention has good safety, and can generate monoterpenoid substances (alpha-terpilenol, linalool, citronellol, carveol and the like) with flower fragrance, elecampane and faint scent and sesquiterpenoid substances (alpha-panaxene, cubene, elemol and gamma-apigene) with herbal fragrance in a substrate fermentation experiment. When the bacillus velezensis JT-14 is applied to tobacco leaf fermentation, the aroma of the aroma raw material obtained through fermentation can be integrally improved, and the aroma is softer.

The invention provides a method for preparing an ultrathin electrolyte film through natural deposition, and belongs to the technical field of fuel cells. The method comprises the steps that a reaction solution containing YSZ powder, ethyl cellulose and terpilenol is prepared, polyvinylpyrrolidone is added to obtain a coating solution, the coating solution is subjected to ball milling to obtain a uniform deposition solution, a novel substrate with a fixed-size frame is prepared based on an anode substrate, ultrasonic dispersion work is conducted in advance, and the novel substrate with the fixed-size frame is prepared. The deposition liquid is applied to the prepared novel substrate, the coating layer is naturally volatilized and deposited under specific conditions, the electrolyte layer and the substrate are dried, warm isostatic pressing is carried out, and finally a blank with the deposited ultrathin electrolyte layer is obtained through press burning. The method has the advantages of simple process, low cost, large-scale production and the like, and the prepared ultrathin electrolyte film has high density, excellent chemical stability and good electrochemical performance and is suitable for the field of fuel cells.

The invention discloses ohmic contact modified thick-film copper paste adaptive to spinel ceramics and a preparation method of the ohmic contact modified thick-film copper paste. The ohmic contact modified thick-film copper paste comprises 80-85 wt% of high-purity copper powder, 0.5-1 wt% of an interface modifier, 4-7 wt% of a bonding aid, 0.3-0.8 wt% of a grain refiner, 0.2-0.5 wt% of an antioxidant aid and 12-15 wt% of a carrier. The preparation method comprises the following steps: drying in a high-temperature vacuum environment; weighing all the materials except the carrier, adding 4wt% of terpilenol, and stirring and mixing to obtain mixed powder; adding the terpilenol and the ethyl cellulose in the remaining proportion into the mixed powder, stirring and dispersing, and grinding for three times; after grinding is completed, terpilenol is added, and the viscosity of the copper paste is adjusted; the copper slurry is filtered, and large-particle impurities and aggregates are removed; and defoaming the copper paste to obtain the modified thick-film copper paste. The method has the advantages that the interface modifier provides excellent ohmic contact performance; the sintered copper paste is high in density, low in porosity, stable in sheet resistance and large in through-flow density, and is obviously superior to the traditional copper paste; the grain refiner avoids structural failure, and the long-term working reliability is improved; sn powder and copper form an alloy, so that the service life is prolonged.

This application discloses a method for preparing dihydroterpineol, relating to the field of terpene fragrance synthesis technology. The method comprises the following steps: Step 1, material preparation: α-terpineol, solvent, catalyst, hydrogen, and co-catalyst are prepared for use; Step 2, pretreatment: 90-100 parts of α-terpineol are mixed with 75-80 parts of solvent and stirred once until homogeneous, then 0.08-0.1 parts of co-catalyst are added and mixed again until homogeneous to obtain a stock solution; Step 3, continuous hydrogenation: The stock solution is pumped into a fixed-bed reactor filled with catalyst, while hydrogen is introduced and the temperature is controlled at 80-90℃ for continuous feeding and discharging to obtain a reaction solution; Step 4, distillation purification: The reaction solution is distilled to obtain dihydroterpineol; wherein the catalyst is a Pd-Mn-La / modified HZSM-5 catalyst. This application, by controlling the temperature at 80-90℃ for the preparation of dihydroterpineol, effectively improves product purity and yield, reduces preparation difficulty, and lowers production costs.

The invention discloses a compound fructose additive for an aroma compound in tobacco, the compound fructose additive for the aroma compound in the tobacco comprises fructose and a faint scent aroma compound, and the mass ratio of the fructose to the faint scent aroma compound is 1: (0.00008-0.0125). The faint scent aroma compound is selected from at least one of anethole, dihydroactinidiolide, alpha-terpilenol, ethyl acetoacetate, methyl salicylate, transcis-2, 6-nonadienal, hexanol, leaf alcohol, phenethyl alcohol and phenylacetaldehyde. According to the compound fructose additive for the aroma compound in the tobacco, taste perception is influenced by aroma, the sweetening effect can be achieved only on the premise that the dosage of sugar is reduced, the effect of improving the taste comfort can be achieved, and the compound fructose additive has guiding significance for studying that different aroma notes influence different sweetening effects and is worthy of popularization and application. And a new strategy is provided for the food industry.