7results about How to "Guaranteed conversion rate" patented technology

The invention provides a primary acetylene gas production process, and relates to the technical field of acetylene gas production processes, and the primary acetylene gas production process comprises the following steps: firstly, carrying out on-line screening on a crushed raw material calcium carbide in a specially-made feeding bin, and executing at least three times of'vacuumizing-inert gas filling 'pressure pulse cycles, deeply removing air and moisture adsorbed in pores of the calcium carbide particles; then putting the purified calcium carbide into an acetylene generator provided with a temperature control jacket, and carrying out hydrolysis reaction in a low-temperature interval of 40-65 DEG C; in the reaction process, multi-stage rake teeth of a mechanical stirrer are used for providing strong shearing force to peel off a passivation layer on the surface of calcium carbide, and meanwhile, an external circulating spraying system is matched for eliminating the temperature gradient and local overheating in the reaction kettle. And side reactions such as acetylene polymerization, cracking and oxidation are obviously inhibited.

The application discloses a perovskite type medium-temperature desulfurizer and a preparation method and application thereof. The perovskite type medium-temperature desulfurizer comprises a carrier and an active component loaded on the carrier; the carrier is a perovskite type material; raw materials of the perovskite type material include metal salt A, tetra-n-butyl titanate and sodium hydroxide; raw materials of the active component are metal salt B, which is loaded on the perovskite carrier through an impregnation method; the metal salt B is selected from transition metal salt, and the mass percentage of the transition metal salt in the perovskite type material is 1% to 30%. The perovskite type medium-temperature desulfurizer prepared by the application has the best medium-temperature desulfurization effect, and the medium-temperature desulfurization effect can reach more than 99%.

The application relates to a commodity rearrangement method, device, equipment and storage medium. Main technical solutions comprise the following steps: obtaining a user request, searching according to the user request, and obtaining a plurality of matched commodities; inputting the plurality of matched commodities into an initial arrangement model to obtain a plurality of commodities to be rearranged; obtaining an initial arrangement score of each commodity to be rearranged, obtaining a sorting factor of each commodity to be rearranged according to the initial arrangement score, obtaining a preset bottoming factor, comparing each sorting factor with the preset bottoming factor, and selecting the maximum as a rearrangement factor of each commodity to be rearranged; performing a rearrangement operation on each commodity to be rearranged according to the rearrangement factor, and displaying the rearranged result to the user. The application adopts a dynamic truncation mode to disturb the original sorting scene at the least cost, achieves the effect of the least influence on the initial arrangement result, guarantees the click rate and conversion rate, and ensures that the rearranged commodities meet the demands of the user.

The invention relates to an organic catalyst for 2-heptanone synthesis reaction and a preparation method and application thereof.The organic catalyst is prepared from, by weight, 7-45 parts of active components, 0.1-2.5 parts of auxiliaries and 50-120 parts of carriers, the active components comprise the first active component and the second active component, the weight ratio of the first active component to the second active component is (60: 1)-(3: 1); wherein the first active component is one or more of iron oxide, tungsten oxide, molybdenum oxide, titanium oxide, chromium oxide, vanadium oxide, copper oxide, zinc oxide, nickel oxide, cobalt oxide and manganese oxide; and the second active component is one or more of lanthanum, cerium, indium, praseodymium, neodymium, gadolinium and holmium.

The utility model discloses an in-situ dehydration high-conversion-rate methanol synthesis system, and relates to the technical field of fuel synthesis equipment. In the in-situ dehydration high-conversion-rate methanol synthesis system, an inlet of a synthesis tower A and an inlet of a synthesis tower B are communicated with an outlet of a gas raw material supply assembly, so that gas raw materials required by reaction are input into the synthesis tower A and the synthesis tower B; an outlet of the synthesis tower A and an outlet of the synthesis tower B are communicated with an inlet of the methanol discharge assembly so as to discharge methanol; the first switch valve A is arranged between an inlet of the synthesis tower A and an outlet of the gas raw material supply assembly, and the second switch valve A is arranged between an outlet of the synthesis tower A and an inlet of the methanol discharge assembly; the first switch valve B is arranged between the inlet of the synthesis tower B and the outlet of the gas raw material supply assembly, and the second switch valve B is arranged between the outlet of the synthesis tower B and the inlet of the methanol discharge assembly. By using the methanol synthesis system, the conversion rate of methanol synthesis reaction can be increased.

This invention relates to the field of catalyst technology, providing a supported ruthenium-based catalyst, its preparation method, and its application. The supported ruthenium-based catalyst provided by this invention comprises a support and an active metal Ru; the active metal Ru is dispersed on the surface of the support in the form of elemental atom clusters and Ru oxide clusters; the elemental Ru atom clusters are dispersed around the Ru oxide clusters; the support is an oxygen-containing support. The supported ruthenium-based catalyst provided by this invention exhibits high hydrogenation selectivity and activity. When applied to the selective hydrogenation reduction reaction of 2,4-dinitroaniline, it can effectively improve the conversion rate of the reactants and the selectivity of the target product, 4-nitro-o-phenylenediamine. The preparation method provided by this invention is simple, easy to operate, and suitable for large-scale production.

This disclosure relates to a framework heteroatom titanium-silicon molecular sieve with hierarchical pores, its preparation method, and its application. The framework heteroatoms include titanium. The framework heteroatom titanium-silicon molecular sieve has the following characteristics: 29 Si MAS NMR characteristics: The peak area of ​​the peak at the chemical shift position of the framework heteroatom titanium-silicon molecular sieve at -103±1ppm is denoted as Q3; the peak area of ​​the peak at the chemical shift position of the framework heteroatom titanium-silicon molecular sieve at -113±1ppm is denoted as Q. 4‑1 The peak area of ​​the spectrum at the position with a chemical shift of -116±1ppm for the framework heteroatom titanium-silicon molecular sieve is denoted as Q. 4‑2 As defined in equation (1), X1 is any value between 0.02 and 0.35: X1 = Q3 / Q 4‑1 Equation (1); X2 is defined as any value between 0.10 and 0.60 as in Equation (2): X2 = Q3 / Q 4‑2 Formula (2). This molecular sieve has high catalytic activity and stability, and significantly improves the conversion rate of cyclohexanone oxime and the selectivity of caprolactam.