47 results about "Mole ratio" patented technology

The application provides a hydrogen arsenide reaction kettle feeding control method and device, equipment and storage medium, and belongs to the technical field of hydrogen arsenide reaction. The method comprises the following steps: determining an initial feeding mode of raw materials in the initial stage of reaction based on the volume of the reaction kettle and an expected reaction molar ratio; the raw materials comprise zinc arsenide and dilute sulfuric acid; the expected reaction molar ratio is an expected molar ratio between the zinc arsenide and the dilute sulfuric acid; in response to a pressure change rate in the reaction kettle being less than a preset change rate value, switching the initial feeding mode to a uniform feeding mode of the raw materials in the middle stage of reaction; and in response to a generation rate of hydrogen arsenide being lower than a preset generation rate value, switching the uniform feeding mode to a final feeding mode of the raw materials in the late stage of reaction. The hydrogen arsenide reaction kettle feeding control method and device, equipment and storage medium provided by the application can accurately grasp the feeding time and feeding speed of the reaction kettle.

A method for manufacturing solketal ((2,2-Dimethyl-1,3-dioxolan-4-yl)methanol) includes: (1) milling starting reagents, including at least: glycerol, a catalyst selected from a hard Lewis acid including at least one transition metal, and acetone, the molar ratio (glycerol):(acetone) being less than or equal to 0.8; preferably less than or equal to 0.7, at an ambient temperature greater than or equal to 50° C., preferably greater than or equal to 56° C., in a three-dimensional microbead mill in a liquid phase for a residence time less than or equal to 15 minutes, preferably less than or equal to 10 minutes, and in particular less than or equal to 5 minutes; (2) recovering, as output from the mill, a final composition including solketal and, where appropriate, one or more sub-products corresponding to the starting reagents that have not reacted and / or to 1,3-O-isopropylidene-glycerol, and (3) optionally, separating the solketal from the one or more sub-products.

An one component (1K) composition comprising: a) thermally-expandable thermoplastic microspheres; b) at least one epoxide compound; c) at least one compound which provides at least two amine hydrogens reactive toward epoxide groups; and, d) at least one accelerator, wherein the composition is characterized by a molar ratio of epoxide-reactive groups to epoxide groups from 0.6:1 to 1.2:1, preferably from 0.95: 1 to 1.1:1. The present disclosure envisages the use of this one component (1K) composition in providing an adhesive within a bonded structure upon curing of said composition under conditions in which the constituent microspheres retain their capacity to thermally expand.

The invention relates to the technical field of analytical chemistry and hydrometallurgy, in particular to a method for measuring coordination number of organic acid and RE < 3 + > by using a molar ratio method. The method comprises the following steps: S1, preparing a plurality of organic acid solutions of CY with different concentrations, preparing a RE3 + solution of CM, mixing the organic acid solutions and the RE3 + solution in an isovolumetric manner, adjusting the pH value, and carrying out a complexation reaction; s2, carrying out ultraviolet spectrophotometric measurement, determining the maximum absorption wavelength, and determining the absorbance A of the solutions after the complexation reaction under the maximum absorption wavelength; s3, drawing by taking the molar ratio n = [CY] / [CM] as a horizontal coordinate and the absorbance A as a vertical coordinate, and finding out an interval in which the absorbance linearly rises along with the increase of n and an interval in which the absorbance reaches a platform or the slope is obviously changed; linear fitting is conducted on the data points of the two intervals, two straight lines are obtained, and the value of an abscissa n corresponding to the intersection point of the two straight lines is the coordination ratio of the complex. The method is reliable in result, low in cost, easy to popularize, convenient and fast.

Provided is a method for producing an alkane, which performs a reaction at a relatively low reaction temperature and reaction pressure, suppresses carbon reduction with respect to an alcohol, and has excellent conversion rate and selectivity. A method for producing an alkane from an alcohol having 8-24 carbon atoms, said method comprising: a step in which the alcohol having 8-24 carbon atoms and hydrogen are reacted in the presence of a zeolite catalyst and a noble metal from Group 8-10 of the periodic table under the conditions of a reaction temperature of 160 DEG C or higher and a hydrogen pressure of 3 MPa or less in terms of gauge pressure; the zeolite catalyst is of an H-beta type or an H-ZSM-5 type, and the molar ratio (SiO2 / Al2O3) of silica (SiO2) to alumina (Al2O3) is 20-35.

A two component (2K) composition comprising: a first component comprising: a) at least one epoxide compound; and, a second component comprising: b) at least one compound which provides at least one epoxide-reactive group; c) at least one accelerator, wherein the composition further comprises: d) at least one particulate liquid-absorbent polymer, and wherein the composition is characterized by a molar ratio of epoxide groups to epoxide-reactive groups (ER) of from 0.6:1 to 1.2:1, for example from 0.9:1 to 1.1:1.

This application relates to a fluid water-in-oil emulsion comprising: A) at least one polyester, which is a reaction product of the following components (i), (ii) and (iii): (i) at least one polyglycerol-3; (ii) at least one dimer acid; and (iii) at least one fatty monocarboxylic acid having 8 to 30 carbon atoms, wherein the reacting components (i), (ii) and (iii) are in a molar ratio of 1 mole of polyglycerol-3, 0.5 to 1 mole of dimer acid, and 0.1 to less than 2.0 moles of fatty monocarboxylic acid; B) at least one continuous oil phase comprising: 1) at least one volatile hydrocarbon oil; and 2) optionally at least one non-volatile oil; and C) at least one aqueous phase dispersed in the oil phase, wherein the liquid component of the aqueous phase accounts for at least 50% by weight of the total weight of the composition; and D) At least one nonionic surfactant with an HLB of less than 8.0, the chemical structure of which is generated by the reaction of at least one polyhydroxystearic acid and / or at least one polyricinoleic acid with a polyol containing at least two alcohol functional groups; the weight ratio of nonionic surfactant D) to polyester A) is greater than or equal to 0.9 and preferably greater than or equal to 1.0.

The present invention is composition comprising a mixture of a mica and a TR-DRR resin, where each R is independently phenyl or methyl, wherein the mole-to-mole ratio of DRR units to TR units is in the range of from 30:70 to 80:20; and wherein the weight-to-weight ratio of mica to the TR-DRR resin is in the range of 20:80 to 80:20. The composition of the present invention is useful as a coating for a substrate, wherein the coating exhibits good adhesion, and crack-resistance when subjected to high temperatures for several weeks.

The application discloses a method for regulating bubble size in a high-temperature molten salt bubbling tower, comprising the following steps: according to the diameter range of the target bubble required by the bubbling tower, a single-hole bubbling experimental device is built by selecting a bubble distributor with a corresponding characteristic aperture; according to the component of the molten salt required by the bubbling tower, a database of the relationship between the molar ratio of each chemical component of the molten salt and the physical properties is established; in the single-hole bubbling experimental device, a regulation mode is selected according to the size of the characteristic aperture of the bubble distributor, the adjustable range of the bubble diameter is adjusted to the diameter range of the target bubble required by the bubbling tower; and the obtained regulation mode is applied to the bubbling tower; the application can reveal a comprehensive solution of the synergistic mechanism among multiple parameters, so as to realize accurate and predictable control of the bubble size from microns to millimeters, and solve the technical problems from laboratory research to industrial device amplification.

The invention provides an SCM-44 molecular sieve as well as a preparation method and application thereof. The chemical composition of the SCM-44 molecular sieve is xSiO2.y GeO2, the molar ratio of SiO2 to GeO2 is x / y, x / y is larger than or equal to 40, and preferably x / y is larger than or equal to 50. The framework of the SCM-44 molecular sieve contains an Si element and other optional elements, and the SCM-44 molecular sieve has flaky morphology, high specific surface area, large micropore volume and excellent adsorption and catalytic performance.

This inorganic compound includes M, O, and F, in which M is one or more kinds of transition metal elements, when defining a molar ratio of O as “b” and defining a molar ratio of F as “c”, (b / c) is 0.60 or more and 2.30 or less, and a half-value width of a diffraction peak of a (110) plane obtained by X-ray diffraction analysis is 0.60° or less. Also, the inorganic compound includes M, O, and F, in which M is one or more kinds of transition metal elements, when defining a molar ratio of O as “b” and defining a molar ratio of F as “c”, (b / c) is 1.50 or less, and a half-value width of a diffraction peak of a (110) plane obtained by X-ray diffraction analysis is 0.45° or more.

A calcine containing γ-2CaO·SiO2, characterized in that it satisfies the following conditions of a) to c). a) C' / S' (molar ratio) represented by {[CaO]-4[Fe2O3]} / [SiO2] is 1.90 to 2.10. b) Fe2O3 / Al2O3 (molar ratio) is 0.90 to 1.10. c) Fe2O3 is 20.00 mass% or less.

The application discloses a phosphorus-modified beta molecular sieve, characterized in that, after being treated under the condition of 800 DEG C, 17 hours and 100% water vapor atmosphere, the beta molecular sieve has the following characteristics: 29 The molar ratio of silica / alumina of the framework measured by Si MAS NMR is ≤40, 31 The ratio of the characteristic peak area of the chemical shift-17±3 resonance signal to the characteristic peak area of the chemical shift-30±5 resonance signal measured by P MAS NMR is ≥0.70.

The invention discloses an alicyclic low polycarbonate and application and a preparation method thereof, and the preparation method comprises the following steps: adding an alicyclic binary hydroxyl compound and a carbonation reagent into a reaction kettle, carrying out condensation polymerization on the system under the action of a mixed catalyst, and continuously removing reaction byproducts; in the reaction process, the alicyclic low polycarbonate is obtained by controlling the feeding molar ratio of reactants, the reaction time and the type proportion of the mixed catalyst, and the molar ratio of the alicyclic binary hydroxyl compound to the carbonation reagent is (0.98-1.05): 1; the reaction time is 3-6 hours; the ratio of the mixed catalyst is (2-4): 1. According to the invention, the molecular weight is stably controlled within the optimal optical function range of 900-1800 in the low polycarbonate range, and the molecular weight is stable, the molecular weight distribution is controllable and the repeatability among batches is good through the synergistic effect of the feed ratio, the reaction time and the type proportion of the mixed catalyst.

Provided is an inexpensive oxygen storage material having an excellent oxygen release performance at low temperature. One aspect of the present disclosure relates to a composite oxide having a composition represented by a general formula Ce2-w-x′AwA′x′B1-y′-zB′y′B″zO6-w / 2-x′-y′ / 2-z. In the formula, A is one or more elements selected from rare-earth metal elements excluding Ce, A′ is one or more elements selected from alkaline earth metal elements, B is one or more elements selected from the group consisting of Ti and Group 14 elements, B′ is one or more elements selected from the group consisting of Group 13 elements, B″ is one or more elements selected from the group consisting of Group 12 elements, 2−w−x′, w, x′, 1−y′−z, y′, z, and 6−w / 2−x′−y′ / 2−z are mole ratios of Ce, A, A′, B, B′, B″, and O, respectively when B+B′+B″ is assumed to be 1, w, x′, y′, and z satisfy 0≤w<2, 0≤x′<0.5, 0≤y′≤1, 0≤z≤0.5, respectively, and w+x′ satisfies 0≤w+x′<2, and y′+z satisfies 0≤y′+z≤1.

A method for producing a Guerbet alcohol in which a starting material alcohol having 8-22 carbon atoms is reacted in the presence of a catalyst (A) containing a first component and a second component, the molar ratio of the second component to the first component, i.e., second component / first component, being 0.0001-0.005. A first component: copper; the second component is one element selected from the group consisting of Groups 9 to 13 belonging to cycles 4 to 6 of the periodic table and not copper.

To provide a recycling method for separating and recovering a material part (a1) from a treating object (a) which is a composite material composed of at least one or more chemical parts (a2) and at least one or more material parts (a2).SOLUTION: By adjusting the molar ratio X / Y to 0.002 or more and the molar ratio Z / Y to 0.3 or more and 30 or less in the treatment liquid containing the catalyst (b), the nucleophilic agent (c), and the solvent (d) (where X+Y+Z=100 when the respective molar fractions are Xmol%, Ymol%, and Zmol%), the urethane bond contained in the treatment target (a) can be decomposed at a temperature lower than that in the related art, particularly at a temperature of lower than 100°C, and the material part (a2) remaining without being decomposed can be separated and recovered.SELECTED DRAWING: Figure 1

The application provides a process parameter determination method of a hydrogen-based reducing gas preparation process based on carbon precipitation control, which comprises the following steps: calculating the degrees of freedom of a hydrogen-based reducing gas preparation process system under a critical carbon precipitation balance condition; determining a physical quantity parameter that can be independently changed and has a strength property in the hydrogen-based reducing gas preparation process system according to the degrees of freedom under the critical carbon precipitation balance condition, and obtaining a balance gas phase composition function under the critical carbon precipitation balance condition; drawing an H-C-O two-dimensional graph with the mole ratio of H and C as the ordinate and the mole ratio between O and C as the abscissa; using the balance gas phase composition function to represent the O / C mol ratio and the H / C mol ratio in the hydrogen-based reducing gas preparation process system, and obtaining a drawing calculation formula of a critical carbon precipitation point in the H-C-O two-dimensional graph; assigning values to the physical quantity parameters, drawing a critical carbon precipitation curve in the H-C-O two-dimensional graph according to the drawing calculation formula of the critical carbon precipitation point based on the assigned physical quantity parameters, and determining the process parameters of the hydrogen-based reducing gas preparation process based on carbon precipitation control according to the critical carbon precipitation curve.

This invention relates to the field of catalyst technology, and discloses an iron-based catalyst, its preparation method, and its application. The catalyst has the structure shown in the following formula: FeA a M b Q c O x Wherein, A is Cu and / or Zr; M is selected from at least one Group IIA metal element; Q is selected from at least one lanthanide element; a, b, and c are the molar ratios of A, M, and Q to Fe, respectively, where a = 0.1–0.6; b = 0.1–0.4; c = 0.05–0.2; and x is the total number of oxygen atoms required to satisfy the valence of each element in the active component. The iron-based catalyst, through the specific combination of active metal components and their contents, exhibits high CO conversion rate and low-carbon olefin selectivity.

The present disclosure relates to a particle having a core-shell structure, wherein the core comprises a perovskite compound CsPbX3, and the shell comprises Csn-1PbnX3n+12− and at least one organic ammonium cation R1R2R3R4N+, wherein n is 1 or 2; R1 is selected from the group consisting of optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substituted arylalkyl, and optionally substituted heteroaryl; R2, R3, and R4 are each independently selected from the group consisting of —H, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substituted arylalkyl, and optionally substituted heteroaryl; and X is a halide. The present disclosure also relates to a method of passivating a perovskite compound CsPbX3, the method comprising the step of: adding an organic ammonium halide R1R2R3R4NY to the CsPbX3 at a molar ratio of R1R2R3R4NY:CsPbX3 of about 500:1 to about 60000:1 to form a mixture, wherein R1 is selected from the group consisting of optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substituted arylalkyl, and optionally substituted heteroaryl; R2, R3, and R4 are each independently selected from the group consisting of —H, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substituted arylalkyl, and optionally substituted heteroaryl; and X and Y are independently a halide.

The present invention relates to a beta zeolite having excellent catalytic activity and hydrothermal durability, and a method for manufacturing the same. A beta zeolite having a total alkali metal content of 0.5 mass% or less, an SDA content of 4.0 mass% or less, a molar ratio of silica to alumina of 20-35 inclusive, and a ratio of a high intensity of a peak having a peak top at 3735 + / -10 cm-1 to a high intensity of a peak having a peak top at 1860 + / -10 cm-1 in an IR spectrum of 1.90 or less.

The application provides a strong-acid FAU type molecular sieve and a preparation method thereof. The preparation method comprises the following steps: carrying out isomorphous substitution reaction on a FAU type molecular sieve containing a metal element Zr in a skeleton and gaseous SiCl4 at a mass ratio of 0.1-20:1, and then obtaining a high-silicon-aluminum ratio FAU type molecular sieve through calcination; the reaction temperature of the isomorphous substitution reaction is 200-600 DEG C; and the molar ratio of ZrO2 to Al2O3 in the FAU type molecular sieve containing the metal element Zr in the skeleton is 0.01-10.0. The technical scheme provided by the application realizes a substantial increase in the strong-acid content of the FAU type molecular sieve through the isomorphous substitution of the FAU type molecular sieve containing the metal element Zr in the skeleton and the gaseous SiCl4 and then the calcination, and the prepared FAU type molecular sieve also has high crystallinity and a high skeleton silicon-aluminum ratio.

A subject matter of the invention is a catalyst comprising a support and an active phase consisting of nickel, molybdenum and tungsten, and phosphorus, the nickel content, measured in the NiO form, is between 3% and 4% by weight; the molybdenum content, measured in the MoO3 form, is between 2% and 4% by weight; the tungsten content, measured in the WO3 form, is between 34% and 40% by weight; the phosphorus content, measured in the P2O5 form, is between 3% and 4% by weight, with respect to the total weight of the catalyst; the WO3 / MoO3 molar ratio is between 5.3 and 12.4 mol / mol, the NiO / (WO3+MoO3) molar ratio is between 0.20 and 0.33 mol / mol and the P2O5 / (WO3+MoO3) molar ratio is between 0.21 and 0.34 mol / mol. The invention also relates to its method of preparation and to its use in hydrotreating and / or hydrocracking.

The present invention relates to a process of preparation of a compound having formula (I):wherein R1 and R2 represent, independently of each other, an alkyl, a cycloalkyl or an aryl group, said alkyl, cycloalkyl or aryl group being optionally substituted;said process comprising a step i) of reacting:a compound A selected from the group consisting of: trioxane, polyoxymethylene deprived of hydroxyl end groups;a compound of formula (II):anda perfluorosulfonic acid;wherein step i) is carried out at a temperature T1 of at least 50° C., wherein the molar ratio of compound of formula (II): compound A ranges from 1:1 to 1.2:1.

A calcine containing γ-2CaO·SiO2, characterized in that it satisfies the following conditions of a) and b). a) C' / S' (molar ratio) represented by {[CaO]-2([Al2O3]+[Fe2O3])} / {[SiO2]-([Al2O3]-[Fe2O3])} is 1.90 to 2.10. b) Al2O3 is 25.00% by mass or less.

The invention provides a catalyst for preparing methanol through carbon dioxide hydrogenation and a preparation method and application thereof. The catalyst comprises the following components: a composite metal oxide and a spinel compound (ZnO-Cu) Mn2O4. RE containing rare earth, the molar ratio of the rare earth element to the manganese element in the rare earth-containing spinel compound is 0.001-0.1, the molar ratio of the copper element to the manganese element is 0.1-1, and the molar ratio of the zinc element to the copper element is 0.1-1; the molar ratio of a copper element to a zinc element to an aluminum element to a zirconium element to a rare earth element in the composite metal oxide is 1: (0.3-1): (0.01-0.1): (0.01-0.1): (0.001-0.1); the molar ratio of the manganese element in the spinel compound to the copper element in the composite metal oxide is (1: 9)-(9: 1). The catalyst provided by the invention significantly improves the conversion efficiency of carbon dioxide and the selectivity of methanol.

The invention discloses a preparation method of 1, 2-hexanediol, which comprises the following steps: mixing epoxyhexane with water for reaction to prepare 1, 2-hexanediol; wherein the molar ratio of the water to the epoxyhexane is marked as R; the reaction temperature is recorded as T, DEG C; the stirring rotating speed is recorded as N, rpm; the relation of R, T and N is controlled to meet the following formula (1): N is greater than or equal to 2129.5-33.36 T1 / 2-35.65 R (1). According to the method, 1, 2-hexanediol is prepared only through non-catalytic hydration of epoxyhexane and water, the problems that in a traditional production process, the stability of a catalyst is poor, the number of product impurities is large, or product separation is difficult and the product quality is poor due to solvent extraction are solved, and the method is suitable for industrial production.

This invention discloses an alicyclic oligomeric carbonate, its uses, and a preparation method. The preparation method includes the following steps: adding an alicyclic dihydroxy compound and a carbonate esterifying agent to a reaction vessel, and causing a polycondensation reaction in the system under the action of a mixed catalyst, while continuously removing reaction byproducts; during the reaction, the alicyclic oligomeric carbonate is obtained by controlling the molar ratio of the reactants, the reaction time, and the ratio of the mixed catalysts, wherein the molar ratio of the alicyclic dihydroxy compound to the carbonate esterifying agent is 0.98–1.05:1; the reaction time is 3–6 hours; and the ratio of the mixed catalysts is 2–4:1. This invention achieves stable molecular weight control within the optimal optical function range of 900–1800 in oligomeric carbonates. Through the synergistic effect of the feed ratio, reaction time, and the ratio of the mixed catalysts, stable molecular weight, controllable molecular weight distribution, and good batch-to-batch reproducibility are achieved.

The application discloses a high-entropy carbide-high-entropy boride composite ceramic precursor and a preparation method of a composite nanometer ceramic powder, the precursor comprises B elements and C elements and at least four of Ti, Zr, Hf, V, Nb, Ta, Mo and W elements, and the mole number of each metal element accounts for 5-35% of the total mole number of the metal of the precursor; the precursor can generate the high-entropy carbide-high-entropy boride composite ceramic nanometer powder after cracking under vacuum or under normal pressure in inert atmosphere protection. The high-entropy carbide-high-entropy boride nanometer ceramic powder of the application has the following characteristics: each element is uniformly distributed at a molecular level, the average particle size of the nanometer powder is not more than 500 nm, the content of O impurities is not more than 1 wt%, the mole ratio of the B element and the C element in the nanometer powder is 1:19-38:1, and the nanometer powder further contains at least four of Ti, Zr, Hf, V, Nb, Ta, Mo and W metal elements.

The present application belongs to the technical field of chemical data prediction, and more specifically, the present application relates to a fine chemical product purity data prediction method based on deep learning, which comprises: calculating the life damage factor at each time based on historical performance data, the life damage factor being positively correlated with the current cumulative running time at the time and the total number of regenerations, and being negatively correlated with the rated initial maximum life value; calculating the physical correction index at a time, the physical correction index being positively correlated with the life damage factor, and being negatively correlated with the platinum load, the palladium load and the aluminum-titanium molar ratio; inputting real-time working condition parameters into a pre-trained deep learning model for feedforward calculation to obtain the target prediction purity value at the corresponding time; and based on the target prediction purity value and the physical correction index, the prediction purity value at the corresponding time is calculated, effectively improving the accuracy of the product purity data prediction result.