37results about How to "Easy to select" patented technology

The invention relates to a catalyst for synthesizing diphenyl carbonate in phenol oxidative carbonylation as well as a preparation method and an application method of the catalyst. The catalyst comprises carrier rod-shaped nanometer CeO3 and an active component Pd compound, wherein the Pd compound is based on Pd, the weight ratio of the Pd to the CeO2 is 0.1: (10:100). The catalyst is used for synthesizing the diphenyl carbonate in the phenol oxidative carbonylation, solving the separation problem of a homogeneous Pd catalyst and overcoming the shortcomings that a conventional heterogeneous catalyst system is low in reaction rate and long in reaction time, and the like; meanwhile, by using the catalyst, the using amount of additives is reduced in the phenol oxidative carbonylation, only one additive is used, and the defects such as large using amount of the additives, multiple varieties, high difficulty in aftertreatment and high cost of a conventional reaction system are overcome. In addition, according to the method, the catalyst has relatively high activity all the time in the reaction process and can be repeatedly used.

The invention discloses a preparation method for a carbon-based catalyst of composite metal. The method comprises: firstly, impregnating activated carbon into water with a temperature of 40-60 DEG C, and adding an oxidant to carry out surface oxidization treatment for 18-24 hours; then, taking out and drying the activated carbon, putting the dried activated carbon into 20-40% of a complex solution to carry out reflux treatment for 4-6 hours; and finally, taking out the activated carbon and putting the activated carbon into a high-temperature furnace with a temperature of 800-1000 DEG C and pressure intensity of 0.2-0.4 MPa to fix for 4-8 hours to obtain a catalyst of fatty nitrile hydrogenation reaction. The preparation method has the beneficial effects that: the operation is simple, convenient and quick; the prepared catalyst is high in catalytic activity and very strong in selectivity; the preparation process is simple; the metal is easily recycled; the catalyst can be repeatedly utilized for many times; the use cost of the catalyst is greatly reduced; and the influence to the environment is reduced to a great extent.

The invention discloses a method for screening interface elements, an intelligent terminal and a storage medium. The method includes: initializing a window, creating a bitmap for saving data; adding interface elements to the newly created element list; receiving user selection operation, drawing a target graphic on the bitmap according to the selection operation; detecting all interface elements in the element table, marking interface elements with preset colors in the area of ​​the bitmap as selected, and adding to the newly created selected table. In the present invention, when the user needs it, the user draws the target graphic on the screen, and then the user can select multiple interface elements in the target graphic, and complete the selection of a large number of objects with as few operations as possible, which is convenient for the user to select some individuals from the group for The required operation improves the convenience of human-computer interaction.

The invention relates to a method for the oxidation of cyclohexane. The method comprises the step of enabling a liquid-phase mixture containing cyclohexane and hydrogen peroxide to contact a titanium-silicon molecular sieve under the oxidation reaction condition. The method is characterized in that the liquid-phase mixture further contains at least one alkali with the pKb being more than or equal to 4.5, and the molar ratio of the alkali to the hydrogen peroxide is (0.0001-0.1):1. The method provided by the invention is an environment-friendly synthesis process, is environment-friendly and is suitable for industrial production and application. In addition, the production process is easy to control, the catalytic oxidation activity is high, the selectivity of cyclohexanol is good, and the total selectivity of alcohol ketone is increased.

The invention discloses an intelligent TV (television) and a channel input method thereof based on a touch remote controller. The method comprises the following steps that: after the intelligent TV confirms that a channel input command is received, channel numbers with single bits, which are annularly arranged in sequence, are displayed; one of the displayed channel numbers is selected as a selected channel number with a single bit, and the selected channel number is displayed in highlight; and if the intelligent TV confirms that channel input is finished, a channel corresponding to the selected channel number is switched to. When a user requires to switch channels, a ring of annularly arranged channel numbers are displayed on a display screen, the finger of the user can slide on a touch panel of the touch remote controller to select a channel number in a sliding way; and compared with that of the prior art, the requirements on the operation precision and accuracy of the user are greatly reduced, so that the channel input operation of the user can be facilitated.

The invention provides a method for extracting limonin in lemon seeds by HPMC sedimentation assisted reversed micelles, and the method is used for extracting and preparing limonin in lemon grains or pieces of lemon grains. The method comprises the following steps: crushing raw materials; preparing a crude extracting solution; preparing a limonin primary extracting solution; preparing a reversed micelle extracting solution and a re-extraction water phase; performing pre-extraction on the reversed micelle extracting solution for the primary extracting solution, and separating out an upper-layerorganic phase; performing reversed extraction on the upper-layer organic phase through a reversed extraction water phase, and separating out a lower-layer water phase; hydrolyzing an acidic solution for the lower-layer water phase to prepare an acidolysis solution; and purifying the acidolysis solution to prepare limonin powder. The method for extracting limonin in lemon seeds by HPMC sedimentation assisted reversed micelles can sufficiently extract limonin in lemon peel residues, and is high in yield. The whole extracting method is simple in process, is low in cost, is beneficial for amplifying and performing industrial production; the method is simple and feasible, does not need a high-value complex apparatus, does not need professional training by a related operator, and is easily popularized.

The invention discloses an intelligent housing leasing system based on blockchain, which includes a data entry module, a data collection module, an access statistics module, a data analysis module, a transaction module, a transaction evaluation module, an investigation module, a database, a controller, a display module and post-rental management module; the present invention obtains the basic information of the house and the basic image of the house through the data entry module, the data acquisition module and the database, and accesses the statistics module to count the number of times the house has been checked and the time it has been checked within 10 days before the current time of the system , through the transaction module to count the transaction information within 10 days before the current time of the system, and through the investigation module to monitor the communication between the lessor and the user of the house at preset time intervals, and obtain the attention value of the house and the rented house in the corresponding area according to the relevant algorithm Attractive value, the price deviation of the house, the active credit value of the lessor of the house and the rental reference value of the house.