Patent application number | Description | Published |
20080261802 | Cracking Catalyst and a Preparation Process for the Same - The present invention provides a cracking catalyst, containing a rare-earth Y-zeolite and a support, which is characterized in that the rare-earth content in crystal lattice of the rare-earth Y-zeolite is 4-15 wt % of RE | 10-23-2008 |
20080314799 | Catalytic Conversion Method Of Increasing The Yield Of Lower Olefin - A catalytic conversion process for increasing the light olefin yields, which comprises bringing a hydrocarbon oil feedstock into contact with a catalytic conversion catalyst in a catalytic conversion reactor including one or more reaction zones to carry out the reaction, wherein the hydrocarbon oil feedstock is subjected to the catalytic conversion reaction in the presence of an inhibitor; and separating the reactant vapor optionally containing the inhibitor from the coke deposited catalyst, wherein a target product containing ethylene and propylene is obtained by separating the reactant vapor, and the coke deposited catalyst is stripped and regenerated for recycle use by being returned to the reactor. The process can weaken the further converting reaction of produced light olefins such as ethylene and propylene to 50-70% of the original level by injecting the inhibitor; thereby it can increase the yields of the target products. When vacuum gas oil is used as the feedstock, the yield of ethylene is as high as 8.73 wt % and that of propylene is as high as 29.30 wt %, increasing by 14.4% and 26.6% respectively comparing to those obtained without the inhibitor being injected. | 12-25-2008 |
20100076227 | FLUIDIZED CATALYTIC PROCESS FOR PRODUCTION OF DIMETHYL ETHER FROM METHANOL - The present invention provides a fluidized catalytic process for production of dimethyl ether from methanol, wherein said process is carried out in a reactor in which the catalyst is in a fluidized state. Said process comprises the following steps of (1) feeding the methanol feedstock via two or more locations selected from the bottom, lower part, middle part and upper part of the reactor, contacting with the catalyst for preparation of dimethyl ether by methanol dehydration, carrying out the reaction of preparing dimethyl ether by methanol dehydration to obtain the reaction stream, separating said reaction stream to obtain a coked catalyst and a crude product primarily containing the target product, i.e. dimethyl ether; (2) totally or partially feeding the coked catalyst obtained in step (1) into a regenerator in a continuous or batch manner for regeneration via coke-burning, the regenerated catalyst being directly recycled to step (1) after being totally or partially cooled. | 03-25-2010 |
20110065963 | PROCESS FOR PRODUCING DIMETHYL ETHER FROM METHANOL - Disclosed is a process for producing dimethyl ether from methanol, which is characterized in that the absorbing liquid used in said absorbing column is the bottom liquid of DME-fractionating column and/or bottom waste water of the methanol-recovering column. Said process can significantly reduce energy consumption of the apparatus. | 03-17-2011 |
20130006028 | CATALYTIC CRACKING APPARATUS AND PROCESS - The present invention discloses catalytic cracking apparatus and process, which are useful for catalytic cracking of heavy oils with a high heavy oil conversion, a high propylene yield and low dry gas and coke yields. | 01-03-2013 |
20130126609 | ELECTRONIC TICKET STORAGE APPARATUS AND ELECTRONIC TICKET CHECKING SYSTEM AND METHOD - Disclosed are an electronic ticket storage apparatus and an electronic ticket checking system and method. The electronic ticket checking method comprises: associating in advance basic electronic ticket information with preset additional information of the electronic tickets; during a first checking, modifying the additional information of the electronic tickets according to the basic information of the electronic tickets; and during a second checking, performing checking of the electronic tickets by checking the modified additional information of the electronic tickets. | 05-23-2013 |
20140036253 | METHOD AND SYSTEM FOR IMPROVING PRECISION OF ELEMENT MEASUREMENT BASED ON LASER-INDUCED BREAKDOWN SPECTROSCOPY - The present invention provides a method and a system for improving the precision of element measurement based on laser-induced breakdown spectroscopy. The method comprises: press-forming a sample to be measured with a tablet press; making a hole on or immediately above a surface of the press formed sample; forming a layer of aerosol immediately above the surface of the sample to be measured with the components thereof completely identical to those of the sample to be measured; testing the sample to be measured by using a laser-induced breakdown spectroscopic system, so as to obtain the intensities of the characteristic spectral lines of a target element in the sample to be measured; and determining the concentration of the target element in the sample to be measured according to a calibration curve of the target element in prearranged calibration samples. | 02-06-2014 |
20150244764 | METHOD AND DEVICE FOR ACCESSING A WEBSITE - A method for use in a router, includes: obtaining a destination web address and destination post content; generating a post request in accordance with the destination post content; sending the post request to the destination web address; receiving a return message returned from the destination web address in accordance with the post request; judging whether the received return message is a predetermined return message; and if the received return message is not the predetermined return message, continuing to send the post request to the destination web address until the received return message is the predetermined return message. | 08-27-2015 |