299 results about "Mass content" patented technology

The invention provides a neodymium iron boron sintered magnet and a preparation method and application thereof. The neodymium iron boron sintered magnet comprises the following components: R, wherein the mass content of R is 28-33wt%; r comprises Nd and Ce, and optionally comprises or does not comprise at least one of Pr, Dy, Tb, Ho and Gd; m, wherein the mass content of the M is 1.5-2.5 wt%; b, the mass content of the B is 0.95 to 1.05 wt%; the mass content of the Ti ranges from 0.1 wt% to 0.25 wt%; fe is the balance; in the neodymium iron boron sintered magnet, the mass content of Ce is 0.3-5 wt%. By accurately controlling the main alloy element components, the generation of a soft magnetic phase in main phase grains is avoided; and meanwhile, the element components of the auxiliary alloy are optimized, and the dosage ratio of the main alloy to the auxiliary alloy is adjusted, so that main phase grains are refined, a fine titanium-rich phase which is dispersed and distributed is formed in a grain boundary phase, and the magnetic performance of the product is improved.

The invention discloses a method for recovering high-quality germanium concentrate from scrapped glass optical fibers, and belongs to the technical field of rare metal recovery. Crushing and screening the scrapped glass optical fiber to obtain optical fiber powder; the optical fiber powder and NaOH or Na2CO3 are uniformly mixed, the molar ratio of NaSi to NaGe of the mixture is (3-6): 1, and roasting is conducted for 2-4 h at the temperature of 500-800 DEG C; mixing the roasted material with water according to a solid-to-liquid ratio of 1: (4-10), heating to 50-100 DEG C, stirring and dissolving to generate a leaching solution; after filtering, feeding the filtered clear liquid into a spraying device filled with adsorption resin from an inlet of the device at the temperature of 5-40 DEG C and the flow speed of 5-50mm / min; and feeding an inorganic acid desorption agent into a spraying device from an outlet of the device at the temperature of 50-80 DEG C and the flow speed of 10-100mm / min, collecting the desorbed liquid, and adding water which is 3-5 times of the theoretical hydrolysis amount to obtain the germanium concentrate. The method is simple in technological process, low in energy consumption and high in metal direct recovery rate, the germanium mass content of the enriched germanium concentrate is larger than 40%, the germanium recovery rate is larger than 92%, the main component obtained after germanium recovery is sodium silicate, and multiple benefits of resources, economy, environment and the like are achieved.

According to the polyisocyanate composition, the coating composition and the application, the polyisocyanate composition provided by the invention has relatively low viscosity, good cross-linking property and heat resistance; a coating film obtained on the basis of the polyisocyanate composition provided by the invention has comprehensive properties such as good glossiness, alcohol wiping resistance, appearance and the like. The polyisocyanate composition contains an isocyanurate group, the polyisocyanate composition contains a polymer A, a polymer B and a polymer C, the mass content of the polymer A in the polyisocyanate composition is a, the mass content of the polymer B in the polyisocyanate composition is b, the mass content of the polymer C in the polyisocyanate composition is c, and b / (a + c) is larger than or equal to 10 and smaller than or equal to 150; uV absorption peaks exist in a measurement spectrogram, obtained through gel permeation chromatography, of the polyisocyanate composition, the heights of the UV absorption peaks of the polymer A, the polymer B and the polymer C are x, y and z respectively in sequence, and y / (x + z) is larger than or equal to 0.1 and smaller than or equal to 10.

The invention discloses an anti-hydrodynamic-pressure cement-based plugging material for tunnel maintenance and a preparation method thereof. The anti-hydrodynamic-pressure cement-based plugging material comprises the following raw materials in percentage by mass: 40-60% of a cement material, 20-33% of fine aggregate, 5-9% of an admixture, 5-8% of an expanding agent, 6.5-9% of an accelerator, 0.5-0.80% of a water reducing agent and 0.5-1.2% of a tackifier, the total mass content is 100%; wherein the accelerator comprises a nucleating agent and aluminum sulfate, and the mass ratio of the nucleating agent to the aluminum sulfate is (0.2-0.4): (1.0-1.4). The prepared cement-based plugging material is short in setting time, high in bonding strength and excellent in micro-expansion dynamic water pressure resistance.

The invention discloses a core-shell type catalyst as well as a preparation method and application thereof. The catalyst takes a carrier as a core and an active component as a shell, the active component is noble metal and is selected from at least one of Pt, Ir, Rh, Ru and Pd; the mass content is 0.1-5%. The conversion rate of hexavalent uranium and the utilization rate of hydrazine can be increased, and the usage amount of precious metal is reduced. According to the method, hexavalent uranium can be reduced into a tetravalent uranium solution by using a liquid-phase reducing agent under an acidic condition, the conversion rate of the hexavalent uranium can reach 99% within 0.5 h in a stirred tank reactor, and the reaction in a fixed reactor has relatively high stability.

The invention belongs to the technical field of low-melting-point alloys, and provides a low-melting-point gallium-based liquid alloy and a preparation method and application thereof. The preparation raw materials of the gallium-based liquid alloy comprise gallium, indium, tin, zinc, bismuth, antimony, lead and rare earth metal with specific mass content. The rare earth metal comprises one or two of lanthanum, cerium and neodymium. A trace amount of one or two of lanthanum, cerium and neodymium is added into the gallium-based alloy, so that the purity of the alloy can be improved, the viscosity can be reduced, and the surface tension can be adjusted; by adjusting the formula of the alloy, the smelting time is shortened in the alloy smelting process stage, the efficiency is improved, the alloy cost is reduced, the alloy is more uniform macroscopically, the low-temperature stability of the alloy is further improved, and the alloy can be kept in a stable liquid state at the low temperature even 10 DEG C below zero and better meet the special climate requirements.

The invention discloses a low-cost ultra-thin ultra-deep drawing steel strip and a production method thereof, and belongs to the technical field of steelmaking, rolling and heat treatment, and the low-cost ultra-thin ultra-deep drawing steel strip comprises the following chemical components in percentage by mass: 0.015-0.035% of C, less than or equal to 0.03% of Si, 0.15-0.50% of Mn, less than or equal to 0.020% of P, less than or equal to 0.012% of S, less than or equal to 0.003% of T [O], less than or equal to 0.0035% of N, 0.0020-0.0035% of B, more than or equal to 0.004% of Al and the balance of Fe and inevitable impurities. Wherein the mass percentage content of B, N and Al meets the relational expression that B / N is 0.77-1.5, and Al is smaller than or equal to 20 (B-0. 77 N). The ultra-thin ultra-deep-drawing steel strip with the thickness of 0.20-0.30 mm can be produced, and the steel strip is excellent in forming performance, low in punching lug pressing rate, stable in performance and capable of being widely applied to battery shells, electronic elements, tinplate deep-drawing two-piece cans and the like.

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

The invention provides an anodic oxidation die-casting aluminum alloy and a preparation method thereof. The anodic oxidation die-casting aluminum alloy comprises the following elements of, by mass, 0.01%-1% of Mg element, 0.01%-2% of Zn element, 0.01%-2% of Si element, 0.01%-1% of Ni element, 0.2%-0.5% of Fe element, 1.6%-2.4% of Mn element, 0.1%-0.2% of Cu element, 0.02%-0.2% of Ti element, the total content of inevitable impurities smaller than or equal to 0.2%, and the balance Al element. Wherein the sum of the mass content of the Mg element and the mass content of the Zn element is 1-3%, the sum of the mass content of the Si element and the mass content of the Ni element is 0.1-2.5%, and the sum of the Fe element, the Si element and the Ni element is 0.1-3%. The aluminum alloy can be better used for producing thin-wall piece products with the thickness of 0.8-1.8 mm.

The invention relates to the technical field of water-soluble fertilizers, in particular to a high-magnesium medium-trace particle water-soluble fertilizer and a preparation method thereof. The invention discloses a high-magnesium medium-trace particle water-soluble fertilizer, which is prepared by carrying out spray granulation on granulation slurry in a granulator through a nozzle, the specific gravity of the granulation slurry is greater than or equal to 1.68 g / cm < 3 >, and the mass content of magnesium in the granulation slurry is greater than or equal to 2.0%; in the high-magnesium medium-trace particle water-soluble fertilizer, the mass content of magnesium is greater than or equal to 1.0%. Through the steps of neutralization treatment and filtration impurity removal, free acid and impurities which influence the product quality are effectively removed; by accurately controlling concentration and cooling conditions, the content of free water in the product is reduced, and the physical property of the product is improved; through granulation, the final product has better appearance roundness and stability.

The invention relates to a monitoring method for a preparation process of bis (fluorosulfonyl) imide metal salt and a preparation method. The monitoring method is used for monitoring the preparation process of synthesizing the bis (fluorosulfonyl) imide metal salt through double decomposition reaction of bis (fluorosulfonyl) imide and metal salt, and comprises the following steps: taking a real-time reaction solution sample of the double decomposition reaction; testing the real-time total mass content W2 of the free acid in the reaction solution sample and the real-time mass content W3 of the free acid HR in the reaction solution sample; according to the initial mass content W1 of the free acid in the imidodisulfuryl fluoride raw material, the real-time total mass content W2 of the free acid in the reaction solution sample and the mass content W3 of the free acid HR in the reaction solution sample, the percentage content X of the mass of the residual imidodisulfuryl fluoride in the reaction solution to the mass of the imidodisulfuryl fluoride raw material is obtained; and judging the preparation process of the bis (fluorosulfonyl) imide metal salt according to the X value. According to the method, the preparation process of the bis (fluorosulfonyl) imide metal salt can be effectively monitored.

The invention relates to the technical field of alloys, in particular to titanium alloy powder for selective laser melting and a preparation method and application of the titanium alloy powder. The content of V is 3.5%-4.5%; the content of Cr is 1.5%-2.5%; the content of Fe is 0.8%-1.5%; the content of Cu is 0.5%-1%; the content of B is 0.5%-1%; the content of other impurity elements is less than or equal to 0.35%; and the balance of Ti. The mass content ratio of Al to V is (1.3-1.5): 1; the mass content ratio of Cr to Fe is (2-3): 1. The titanium alloy powder is applied to preparation of titanium alloy parts through selective laser melting. The titanium alloy powder is low in cost and simple in preparation process, a titanium alloy part prepared from the titanium alloy powder has high strength and good plasticity at the same time, and the titanium alloy powder is suitable for industrial application.

The invention provides bio-based succinic acid as well as a preparation method and application thereof. The bio-based succinic acid comprises succinic acid, an N element, an S element and a P element, in the bio-based succinic acid, the mass content of an element N is 0.1-10 ppm, the mass content of an element S is 0.1-3 ppm, and the mass content of an element P is 0.1-10 ppm. The bio-based succinic acid provided by the invention contains N, S and P elements with specific contents, and the succinic acid is high in purity and low in impurity content. The bio-based succinic acid is applied to synthesis of chemical products such as polyester, 1, 4-butanediol, succinic anhydride, gamma-butyrolactone and tetrahydrofuran, side reactions can be effectively inhibited, target products with high yield and high purity are obtained, and the products have better hue and physical properties.

The invention relates to the field of preparation of catalytic cracking catalysts, and discloses a catalytic cracking catalyst as well as a preparation method and application thereof. The invention relates to a catalytic cracking catalyst. The catalyst comprises a molecular sieve, a binder and clay, based on the total mass of the catalyst, the mass content of the molecular sieve is 60-85%, the mass content of the clay is 5-20%, and the mass content of the binder is 10-35%; the mesoporous aperture of the catalyst is 3 to 50 nm; in the catalyst, the volume of mesopores with the pore diameter of 6-10 nm accounts for 8-30% of the total volume of the mesopores; in the catalyst, the volume of mesopores with the pore diameter of 30-35 nm accounts for 10-30% of the total volume of the mesopores. The catalyst has excellent catalytic performance, is applied to catalytic cracking reaction, especially naphtha catalytic cracking reaction, and has high conversion rate and low-carbon olefin yield.

The invention belongs to the field of plastic pipes, and discloses a chlorine-resistant polyethylene pipe and a preparation method thereof.The chlorine-resistant polyethylene pipe comprises a polyethylene resin layer serving as an outer layer and a modified graphene coating serving as an inner layer, and the modified graphene coating is a polyvinyl alcohol edge grafted modified graphene coating; and wherein at least a portion of the polyvinyl alcohol forms a crosslinked polyvinyl alcohol; in terms of the total mass of the modified graphene coating being 100%, the mass content of polyvinyl alcohol in the modified graphene coating is 3-30%, preferably 5-25%, and the mass content of graphene is 70-97%, preferably 75-95%. The modified graphene material is developed on the basis of a low-cost and easily-available graphite material through a graphene preparation technology with a simple process and controllable cost, and the modified graphene material is coated on the inner wall of the polyethylene pipe, so that the excellent chlorine resistance of the polyethylene pipe is realized.

A method for inverting true mass content of water ice in lunar soil using a lunar soil water molecule analyzer (LSWMA) includes: obtaining weight data of a lunar soil sample, temperature data of a sample receiving container that receives the lunar soil sample, and duration of a transfer process of the lunar soil sample; obtaining measurement data of total pressure of the water vapor; calculating a sublimation loss based on a sublimation rate and the duration of the transfer process, and estimating a relative sublimation loss rate; correcting the measurement data of the total pressure of the water and obtaining true pressure data of the water vapor; and calculating, based on the true pressure data of the water vapor, mass of the water vapor, and further calculating mass content of water ice in lunar soil.

This invention relates to the field of iron and steel smelting technology, and proposes a method for improving the sintering uniformity of sintering mixtures. The method includes: preparing a first mixture for laying on the lower layer of a sintering machine trolley, and a second mixture for laying on the upper layer thereon, wherein the mass percentage of the first mixture is higher than that of the second mixture, the mass content of fixed carbon in the first mixture is lower than that in the second mixture, and the mass percentage of limestone in the flux used in the first mixture is higher than that in the second mixture; the first mixture is firstly distributed at the head of the sintering machine, and then the second mixture is secondly distributed at the head of the sintering machine; after the distribution is completed, sintering is performed by suction ignition. This invention improves the uniformity of strength and yield between the upper and lower layers of sintered ore, and increases sintering production efficiency.

The present invention discloses a hydrocracking method for producing chemical raw materials. The method includes: (1) in the presence of hydrogen, a hydrocarbon oil raw material enters a first hydrocracking reaction zone to selectively crack the n-alkanes in the hydrocarbon oil raw material to obtain a first hydrocracking product; wherein, in the first hydrocracking product, the mass content of C7 + n-alkanes is controlled below 5.0%; (2) in the presence of hydrogen, the first hydrocracking product enters a second hydrocracking reaction zone to obtain a second hydrocracking product containing monocyclic cyclic hydrocarbons; (3) the second hydrocracking product is separated and fractionated to obtain a gas fraction, light naphtha, and heavy naphtha. When using the hydrocarbon oil as a raw material to produce chemical raw materials, this method can significantly improve the yield and quality of chemical raw materials.

Tooling for shaping a fibrous texture. The present invention relates to a tooling (1) for shaping a fibrous texture for gas-assisted consolidation, comprising a plurality of shaping blocks (10) having a plurality of gas supply orifices and intended to bear against the fibrous texture so as to shape it into the form of a part to be obtained, characterized in that the shaping blocks are made of ceramic and comprise at least silica in a mass content greater than or equal to 30%. Figure for the abstract: Fig. 3.

The application provides a method for detecting the content of sodium hypochlorite in chicken, and belongs to the technical field of quantitative detection. Terahertz spectrum testing is performed on a dried chicken sample to obtain the peak height of a sodium hypochlorite characteristic peak; then, according to a standard curve and the peak height of the sodium hypochlorite characteristic peak, the content of sodium hypochlorite in the chicken is obtained; the frequency of the sodium hypochlorite characteristic peak is 1.10 THz or 1.25 THz; and the standard curve is a fitting curve of the mass content of sodium hypochlorite in the chicken and the peak height of the sodium hypochlorite characteristic peak. Different molecules exhibit different absorption peaks in terahertz absorption spectrum, and the application detects the content of sodium hypochlorite in chicken by using a terahertz spectrum method, and obtains the content of sodium hypochlorite in chicken by using the fitting relationship between the peak height of the sodium hypochlorite absorption peak and the content of sodium hypochlorite. The method provided by the application is simple, and can quickly and accurately obtain the content of sodium hypochlorite in chicken.

This invention relates to the field of catalytic cracking catalyst preparation, and discloses a catalytic cracking catalyst, its preparation method, and its application. The catalytic cracking catalyst comprises a molecular sieve, a binder, and clay; based on the total mass of the catalyst, the mass content of the molecular sieve is 60-85%, the mass content of the clay is 5-20%, and the mass content of the binder is 10-35%; the mesopore size of the catalyst is 3-50 nm; in the catalyst, the volume of mesopores with a pore size of 6-10 nm accounts for 8-30% of the total mesopore volume; in the catalyst, the volume of mesopores with a pore size of 30-35 nm accounts for 10-30% of the total mesopore volume. This catalyst exhibits excellent catalytic performance and, when applied to catalytic cracking reactions, especially naphtha catalytic cracking reactions, demonstrates high conversion rates and low-carbon olefin yields.

The invention relates to a composite material as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The composite material provided by the invention comprises the following components in parts by weight: 10-70 parts of MS resin, 30-90 parts of SBC resin and 5-20 parts of AS resin, the mass content of methyl methacrylate in the MS resin is 20%-30%. The composite material has good bending resistance and can maintain relatively high transparency after being bent.

The present application relates to the technical field of solid lubricant, and particularly relates to a lubricant particle, which comprises a solid lubricant and a binder, the solid lubricant comprises natural graphite, molybdenum disulfide, hexagonal boron nitride and silicon dioxide; the mass content of the natural graphite is 5% to 20% based on the total mass of the solid lubricant, the mass content of the molybdenum disulfide is 5% to 20%, the mass content of the hexagonal boron nitride is 5% to 20%, and the mass content of the silicon dioxide is 40% to 85%. The lubricant particle of the present application can replace the existing powder solid lubricant to solve the problem that the powder solid lubricant is added into the metal binder, is dispersed and distributed in the carcass, hinders the combination of metal elements, and the lubricants are connected and bridged, further hindering the combination of metal elements.

The invention provides a method for determining the floating content of a binder of a negative plate and application. The method comprises the following steps: acquiring a first weight loss ratio a0 of a negative electrode material at a first position of the negative plate in a target temperature interval; adding the negative electrode material at the first position into a target solvent for reflux, and then filtering and drying to obtain a solid substance; obtaining a second weight loss ratio a1 of the solid substance in the target temperature interval; obtaining a third weight loss ratio x1 of the binder standard substance and a fourth weight loss ratio x3 of the thickener standard substance; obtaining a first actual mass content of the binder based on a0, a1, x1 and x3; and obtaining the floating content of the binder based on the first actual mass content and the designed mass content of the binder. According to the method for determining the floating content of the binder in the negative electrode plate, the actual content of the binder in the negative electrode material at any position in the negative electrode plate can be quantitatively analyzed, and then the floating content of the binder is obtained by combining the design content of the binder.

The present application belongs to the technical field of tribology, and provides a kind of lubricating oil system and its preparation method and application, oil-based super-slippery system.The lubricating oil system provided by the present application includes base oil and oil-soluble copper-based nanoparticle;The mass content of oil-soluble copper-based nanoparticle in the lubricating oil system is 0.01-5.0%.The oil-soluble copper-based nanoparticle in the lubricating oil system provided by the present application can improve the load capacity and anti-wear and friction-reducing performance of base oil as an additive;At the same time, under the action of frictional shear, the oil-soluble copper-based nanoparticle in the lubricating oil system provided by the present application can play a role in friction catalysis, promote the formation of high-performance carbon-based material, i.e., "the third body", in the friction interface and lubricating oil, thereby reducing the friction coefficient between polymer-metal pair to 10 ‑3 order of magnitude, and super-slippery phenomenon occurs, and the wear rate is at 10 ‑8 -10 ‑9 mm 3 / Nm level, reaching near-zero wear state.

The invention relates to the technical field of composite materials, and discloses a composition and a preparation method and application thereof, the composition comprises resin, conductive carbon black, a first antioxidant, a second antioxidant and a cross-linking agent; wherein the mass content of metal elements in the conductive carbon black is not more than 10 ppm; wherein the first antioxidant is 2, 4, 6-tri (3 ', 5'-di-tert-butyl-4 '-hydroxybenzyl) mesitylene and / or 1, 3, 5-tri (3, 5-di-tert-butyl-4'-hydroxybenzyl) isocyanuric acid, and the second antioxidant is 2, 4, 6-tri (3 ', 5'-di-tert-butyl-4 '-hydroxybenzyl) mesitylene. Wherein the second antioxidant is bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and / or pentaerythritol tetra (3-lauryl thiopropionate), and the second antioxidant is a mixture of the first antioxidant and the second antioxidant. As a semiconductive shielding material, the composition provided by the invention not only has excellent insulation yellowing resistance, but also has excellent mechanical property and conductivity, and ensures better application of the material in preparation of power cables.

Provided herein is an elastomeric matrix which includes poly(vinyl alcohol) (PVOH), at least two plasticizers none of which is water, and water. The combined mass ratio of plasticizers to PVOH is at least 2: 1; and the combined mass content of PVOH and plasticizers is at least 70 % by weight of the total weight of the matrix excluding water.

The invention provides a low-GI biscuit raw material composition which comprises the following components in parts by weight: 0.1-0.6 part of nanocrystallized bamboo fiber cell walls, the nanocrystallized bamboo fiber cell walls are extracted from bamboo green, are edible and have one-dimensional characteristics, the transverse size is below 100nm, the longitudinal size is above 1mu m, cellulose in the nanocrystallized bamboo fiber cell walls has the crystallinity of 80%-95%, and the grain size of the cellulose in the nanocrystallized bamboo fiber cell walls is 100 nm. The dispersion liquid of the nanocrystallized bamboo fiber cell walls in water has the viscosity of 200 Pas or above when the mass concentration of the dispersion liquid is 0.5%, 40-70 parts of low-gluten flour, 20-35 parts of whole wheat flour, 8-20 parts of grease selected from natural butter, coconut oil or non-hydrogenated vegetable butter and 10-25 parts of sugar substitutes, and the sugar substitutes comprise at least one of erythritol and maltitol; the total mass content of the dietary fibers is greater than or equal to 15%. The beverage has a high low-GI effect, a suitable taste and good crush resistance. Methods of making low GI biscuits and low GI biscuits are also provided.

The application provides a thermal infrared hyperspectral characteristic wave band selection method based on an improved particle swarm algorithm, and comprises the following steps: step 1, preparing a mixed salt ore sample, collecting a hyperspectral emissivity spectrum of the mixed salt ore sample, measuring the mass content percentage of each mixed salt mineral in the mixed salt ore sample as a data set for selecting a characteristic wave band and predicting a content; step 2, taking the data set in step 1 as input, and establishing a prediction model of a characteristic wave band combination of each substance in the mixed salt ore and corresponding content prediction based on the improved particle swarm algorithm; step 3, based on the prediction model in step 2, predicting the characteristic wave band combination of each substance in the unknown mixed salt ore and the corresponding content, collecting the content percentage of the mixed salt ore and verifying the result. The improved particle swarm algorithm does not need to artificially adjust the parameters of the algorithm, and the obtained wave band combination prediction result is stable.

The invention discloses a catalyst for preparing 1, 3-propylene glycol through glycerol hydrogenation and a preparation method and application of the catalyst. The catalyst comprises a carrier, an active component loaded on the carrier and an auxiliary, the active component is Pt, a phosphide of Pt and a phosphide of W, and the auxiliary agent is La or Ba; according to the weight ratio of 100%, the loading capacities of the Pt, the W, the phosphorus and the auxiliary agent are respectively as follows according to the mass content of the carrier: 1-4% of Pt, 3-15% of W, 0.1-5% of phosphorus and 0.1-0.8% of the auxiliary agent. The catalyst is high in stability, is suitable for hydrogenation production of 1, 3-propylene glycol from a glycerin aqueous solution, is high in product selectivity and yield, can reduce the components of the catalytic reaction, is mild in reaction conditions, meets the requirements of green chemical industry, and has great economic values and industrial application prospects.