45results about How to "Reduce reaction temperature rise" patented technology

The invention discloses an animal and vegetable oil-catalytic diesel oil combined hydrogenation method. The animal and vegetable oil-catalytic diesel oil combined hydrogenation method comprises following steps: countercurrent contact of animal and vegetable oil with hydrogen is carried out in a hydrogenation heterogeneous reactor, and hydrofinishing and condensation point reduction reaction are carried out; an obtained liquid effluent is mixed with catalytically cracked diesel oil, an obtained mixture is delivered into a hydrogen mixing tank for hydrogen mixing, and then is delivered into a liquid phase hydrogenation reactor for hydrofinishing; a part of obtained hydrofined diesel oil is cycled to a lower catalyst bed layer of the hydrogenation heterogeneous reactor. On the one hand, hydrogenation heterogeneous condensation point reduction of the animal and vegetable oil is capable of increasing hydrogen dissolving amount of the liquid phase hydrogenation reactor, and on the other hand condensation point of the animal and vegetable oil is reduced, the animal and vegetable oil is high in cetane value, and combined hydrogenation of the animal and vegetable oil with catalytic diesel oil is capable of solving a problem that the cetane value is too low. The animal and vegetable oil-catalytic diesel oil combined hydrogenation method is capable of widening raw material sources for refinery diesel oil production, and also providing a method for processing of low-quality catalytic diesel oil.

The invention relates to a method for epoxidation of cumene hydroperoxide and propylene, which mainly solves the problem of high reaction temperature rise in the prior art and the need for relatively high propylene and isopropyl hydroperoxide in order to maintain high reaction efficiency. The question of the molar ratio of benzene. The present invention enters the reaction zone by adopting raw materials cumene hydroperoxide and propylene liquid phase, and the total molar ratio of propylene and cumene hydroperoxide is 15-160°C at the epoxidation reaction temperature and 1.0-12.0MPa pressure. Under the condition of 2 to 30, the raw material is contacted with Ti-silicon dioxide catalyst to carry out epoxidation reaction to generate propylene oxide; wherein, the technical scheme that the epoxidation reaction product containing propylene oxide is partially recycled to the entrance of the reaction zone is better This problem has been completely solved, and it can be used in the industrial production of propylene oxide from cumene hydroperoxide and propylene epoxidation.

The invention discloses a method for producing an ethylene cracking material through liquefied gas hydrogenation. The method is characterized in that liquefied gas and hydrogen pass through a hydrogenation reactor through a cocurrent flowing mode, then are contacted with a hydrogenation catalyst under hydrogenation technical condition and subjected to a reaction; the hydrogenation reactor comprises more than two reaction segments, and according to a contact sequence with a reaction material, the activity of the catalyst in a downstream reaction segment is higher than the activity of the catalyst in an upstream reaction segment. The method reduces the relative average reaction speed at an entrance of a catalyst bed layer, changes problem of large relative average reaction speed at the entrance of the catalyst bed layer, a difference of the average reaction speed of each segment of the catalyst bed layer is greatly reduced, and the relative average reaction speed of each segment of the catalyst bed layer is more uniform.

The invention relates to an efficient heat-integrated method for preparing hydrocarbon from methanol by adopting a moving bed. The method comprises a hydrocarbon synthesis step, a separation step and an after-treatment step, wherein in the hydrocarbon synthesis step, two reactors which are connected with each other in series are adopted; reaction products of a plurality of reactors are utilized to perform heat-exchange heating on reaction raw materials and low-carbon-hydrogen containing recycle gas produced in the separation step, so that the recycle gas is returned to different feeding positions of the hydrocarbon synthesis step as quenching gas or raw material supplementing gas of the hydrocarbon synthesis step; the raw material methanol is utilized to perform scrubbing-absorption on C1-C4 light components generated in the separation step, and returned for being fed and converted, so that the methanol is transformed into high value-added stable light hydrocarbon comprising mixed aromatic hydrocarbons. According to the method, the refining control on a reaction process is improved through inter-stage heat exchange of reaction prdocuts, so that the materials are effectively utilized and thermally integrated among processing processes, and the environmental pollution is reduced while the product yield is increased and the energy consumption is reduced.

The invention discloses a plant and animal oil and catalytic diesel oil associated hydrogenation process. The method is as follows: plant and animal oil is mixed with hydrogen, and then the mixture enters into a hydrogenation isomerization reactor for hydrogenfinishing and isomerized condensation point reduction reactions; a reaction effluent enters into a hot high-pressure separator for separation, a hot high pressure liquid separation phase is mixed with catalytic cracking diesel oil, then the mixture enters into a hydrogen mixing tank for hydrogen mixing, and then the mixture enters into a liquid phase hydrogenation reactor for the hydrogenfinishing reaction, and part of the hydrogenfinished diesel oil is cycled to a lower catalyst bed layer of the hydrogenation isomerization reactor. After hydrogenation isomerization condensation point reduction of the plant and animal oil, on one hand, the hydrogen dissolving amount of the liquid phase hydrogenation reactor can be improved, the condensation point is reduced, and the plant and animal oil has a high cetane number, and can make up for the shortage of a deficient cetane number of catalytic diesel oil by catalytic associated hydrogenation. The method broadens the sources of raw materials for diesel oil production of a refinery plant, and provides a way out for processing of poor-quality catalytic diesel oil.

The present invention discloses a method for producing an ethylene cracking material through dry gas hydrogenation. According to the method, olefin-containing dry gas and optional supplemented hydrogen enter a fixed bed hydrogenation reactor in a co-current flow manner, and contact a hydrogenation catalyst under a hydrogenation process condition, a reaction is performed, and the obtained reaction products are separated to obtain the dry gas having the saturated olefin; and the hydrogenation reactor comprises four reaction sections, and according to the sequence of the contact between the material and the catalyst, the law of the hydrogenation activity metal contents in the catalysts in each reaction section is the low content, the high content, the low content and the high content. According to the present invention, with the method, the relatively average reaction rate of the inlet section of the catalyst bed layer is reduced, the problem that the relatively average reaction rate of the inlet section of the catalyst bed layer is high is solved, the difference among the average reaction rates of each section of the bed layer is substantially reduced, and the relatively average reaction rates of each section are uniform; and with the method, the deep oxygen removal can be ensured.