59results about How to "Increase the number of applications" patented technology

A printing mask has protrusions having through holes defined therein for printing a solder paste on lands on a printed circuit board. The protrusions serve to increase the amount of solder paste filled in the through holes.

The invention discloses a synthetic process for an amino aromatic hydrocarbon compound. The process comprises the following steps: pre-preparing reaction solutions -1 and -2 by using an aromatic hydrocarbon compound (I), concentrated sulphuric acid and concentrated nitric acid, respectively pumping the solutions in a micro reactor, heating to react, cooling the reaction liquid, and pos-treating to obtain a nitryl aromatic hydrocarbon compound (II); mixing the nitryl aromatic hydrocarbon compound (II), a catalyst and a solvent as a reaction solution -3; respectively pumping the reaction solution -3 and hydrogen into the micro reactor, heating to react, cooling the reaction liquid and post-treating to obtain the amino aromatic hydrocarbon compound (III). The process disclosed by the invention is less in use level of nitric acid, convenient to concentrate and apply waste acid; in the nitrification reaction process, the heat release is little, and the nitration product nitryl aromatic hydrocarbon compound (II) is quickly transferred. The reaction phenomenon is stable without intense heat release and even material punching of a common kettle nitration reaction, so that the safety of nitration reaction is improved; the process is easy to realize industrialization, simple to operate and high in industrial safety degree and meets the environmental requirements.

The invention belongs to the technical field of fine chemical engineering, and relates to a method for preparing 3,4-dichloroaniline from 3,4-dichloronitrobenzene through high-selectivity catalytic hydrogenation. With 3,4-dichloronitrobenzene as raw material and in the presence of a Pt catalyst, 3,4-dichloroaniline is prepared through a catalytic hydrogenation reaction under the pressure of 1.0 MPa-3.0 MPa and at the temperature of 75-120 DEG C. With adoption of the method, the conversion rate of 3,4-dichloronitrobenzene is 100%, the selectivity of 3,4-dichloroaniline is greater than 99.6%, and the dechlorination rate is less than 0.20%. The Pt catalyst is safe to use, and has stable catalytic activity and high selectivity; a dechlorination inhibitor is not required to be added; through introduction of Fe2O3 into the Pt catalyst, a dechlorination phenomenon can be effectively inhibited, and the corrosion of dechlorination to a reaction container during reduction is reduced; and the method is not added with a solvent, overcomes the defect of the addition of the solvent, avoids the problems of pollution of the solvent to the environment and solvent recovery, reduces equipment investment, and reduces production costs.

A post-processing apparatus for performing post-processing on a sheet having an image formed thereon, the post-processing at least including case bookbinding by using paste, the apparatus including: a paste applicator having a paste application member and configured to supply paste to coat a back of a sheet bundle with the paste; a pressurization member for pressing a cover onto the back of the sheet bundle with the paste coated thereon; and a controller configured to receive information relating to a cover gutter setting on the sheet bundle and to perform control over the paste applicator and the pressurization member, the controller being configured to cause, in a guttered cover setting, the paste to overflow in a larger amount from the back of the sheet bundle toward a gutter than an amount of overflow in a non-guttered cover setting based on the information relating to the cover gutter setting.

The invention discloses a preparation method of adiponitrile, the preparation method comprises the steps of first hydrocyanation reaction, isomerization reaction and second hydrocyanation reaction, and the preparation method adopts a porous polymer-nickel catalyst to replace a traditional homogeneous catalyst for reaction. The catalyst can be recycled in a reaction system through simple separation, the catalyst separation and recovery steps are simplified, the catalyst recycling frequency is greatly increased, the catalyst cost is reduced, and industrial production is easier to realize.

An electronic circuit board is formed by a pattern forming step for forming a conductive pattern of an electronic circuit board by applying a metal colloid solution on a base material by an inkjet method and a coagulant application step for applying a coagulant solution at least on the conductive pattern by a deposition method.

The invention discloses a multimedia information processing system and a multimedia information processing method, and belongs to the technical field of electronics. The multimedia information processing system comprises an image collecting and generating device, a voice receiving and broadcasting device and a FingerQ platform, wherein the image collecting and generating device is used for obtaining a person image; the voice receiving and broadcasting device is used for receiving voice information related to the person image; the image collecting and generating device is also used for determining whether the person image is a person image which is already stored in the FingerQ platform or not, enabling the voice information to be matched with the person image if not and storing the voice information and the image information in the FingerQ platform; the image collecting and generating device is also used for starting an authentication registration page, sending request information for inviting a connection mode to a second mobile terminal of a second user corresponding to the person image, enabling the second user to register in the authentication registration page and adding application functions of the FingerQ platform by the second mobile terminal after the second user registers. According to the multimedia information processing system disclosed by the invention, the business contact function of the user can be greatly convenient, and convenience is provided for the user to use.

The invention discloses a method for preparing diacetyl ethylene diamine. The method includes the following steps: a. a catalyst and a dehydrating agent are added into an acetic acid and mixed evenly with the acetic acid; b. the temperature is controlled to be between 25 and 80 DEG C and the ethylene diamine is dropped in the acetic acid solvent obtained in the step a, wherein the molar ratio between the ethylene diamine and the acetic acid is 1:2 to 2.5; c. the mixed liquid is stirred and heated for reflux and the temperature is preserved for one hour and then dehydrated; and d. a dehydratedreagent is cooled to 25 DEG C and is extracted and filtered after solids are precipitated; a filtrate is recycled; an obtained solid is dried to obtain the diacetyl ethylene diamine. The process of the method is simple; the manufacturing cost is low and the product quality is good; and the permeation rate of the mother liquid decolorized by reducing agents is enhanced dramatically, thus being capable of increasing the application times and reducing the manufacturing cost.

The invention relates to the technical field of catalysts, and particularly discloses a regeneration method of a hydrogenation catalyst used for preparing an aromatic amine antioxidant. The method adopts a solvent having better solubility for macromolecular organic substances (polyanilines) which block catalyst pore channels as a hot detergent, and realizes the effects of cleaning coking and unblocking the pore channels; and the washed catalyst is further subjected to hydrothermal treatment to reconstitute weakly-acidic sites (mainly based on phenolic hydroxyl groups) on the carbon surface toeffectively restore acid catalytic performance of a ketoamine condensation reaction. The method provided by the invention has the characteristics of simple operation, mild conditions, environmental protection and high efficiency, the method does not destroy a structure of a carbon carrier and a loading state of active metal nanoparticles while unblocking the pore structure of the catalyst and reconstituting the acidic sites, and the treatment method is highly compatible with the characteristics of a ketoamine reductive amination reaction, and can effectively restore the activity of the catalyst.

The invention belongs to the technical field of synthesis of 4, 4-(hexafluoroisopropenyl) diphthalic anhydride, in particular to a synthesis method of 4, 4-(hexafluoroisopropenyl) diphthalic anhydride. The synthesis method has the advantages of easy separation of intermediate products, high yield, less waste and good economic benefit, and a mixed solvent of isobutanol and butyl acetate is adoptedto reduce the solubility of the product, facilitate the separation of the product and increase the yield. Besides, the Pd/C catalyst is pretreated, a proper amount of sulfide is added for pretreatment, the sulfur poisoning resistance of the catalyst is improved, the service life of the catalyst is prolonged, and the application frequency of the catalyst is increased; because nitro compounds contain trace amount of sulfides such as sulfuric acid and like, catalyst is easily poisoned. In the step 2, an alumina-silica gel catalyst is added so that 2, 2-bis (3-amino-4-hydroxyphenyl) molecules canbe adsorbed on the surface of the catalyst in a flat shape, hydroxyl is closer to the surface of the catalyst, and the amination reaction of hydroxyl is facilitated; in the step 4, a small amount of urea is added in the cyanolysis reaction to prevent diazonium salt from being oxidized, becoming tar and other side reactions.