49results about How to "Reduce coke rate" patented technology

The invention discloses a method of needle coke raw material by using delay coking technique to treat FCC slurry oil and conventional coking raw material. The method comprises: introducing FCC slurry oil with low temperature into a delay coking tower from the upper part inside the tower, leading the introduced FCC slurry oil to be contacted with high temperature oil gas generated by the conventional coking raw material which is introduced into the tower from the bottom and treated by high temperature decomposition, and reacting under the condition of delay coking; and separating the generated oil gas in a coking fractionating tower, and obtaining the needle coke raw material. In the method, as the FCC slurry oil enters into the coking tower at the lower temperature, the decomposition temperature of the conventional coking raw material is lowered, the high temperature decomposition time of the raw material is shortened, the occurrence of secondary reaction is reduced, green coke rate is reduced, the stable operation cycle of a signal tower is prolonged, and light components which have high reaction activity and are not beneficial to producing the needle coke, heavy components with high polymerization activity, and a great deal of impurities such as catalyst powder, heavy metal and the like can be removed. The obtained needle coke has high yield and good properties.

The invention discloses a method for suspended bed hydrocracking of heavy oil, wherein the method comprises the steps: mixing a low-quality heavy oil suspended bed hydrogenation catalyst and low-quality heavy oil evenly, then allowing the mixture to enter a suspended bed hydrogenation reactor, wherein the catalyst includes a zinc oxide powder and an ore component powder; and heating up to a reaction temperature, and carrying out a hydrogenation reaction, wherein the temperature of the hydrogenation reaction is 320-500 DEG C, the reaction pressure is 5-20 MPa, the reaction time is 0.5-4 h, thehydrogen and oil volume ratio is 100-2000 and the space velocity is 0.2-4.0 h<-1>. The technological method has strong adaptability to raw materials, can effectively reduce gas phase yield, and has the advantages of high conversion rate of the low-quality heavy oil, low coking yield, high desulfurization rate and good activity.

The invention discloses a creamy iron-based catalyst, its preparation method and application. The method comprises the steps of: (1) preparing a ferrous sulfate solution; (2) when the auxiliary agent contains SiO2 and / or Al2O3, adding a silicon source and / or an aluminum source to the ferrous sulfate solution, and adding a precipitation agent Carry out co-precipitation to obtain a precipitated slurry; (3) wash the precipitated slurry with water, and filter to obtain a filter cake; (4) obtain the creamy iron-based catalyst according to the following 1) or 2): 1) filter the Cake and solvent oil or a mixture of solvent oil and dispersant are mixed to obtain a mixture, and the mixture is crushed by mechanical stirring; the crushed material is sheared to obtain a creamy iron-based catalyst; the shearing process is accompanied by a dehydration process ; 2) When the auxiliary agent contains MgO and / or CaO, proceed according to the following a) or b). The emulsifiable oil catalyst system of the present invention is stable in state, does not delaminate during storage, and can be stored continuously for more than three months without deterioration, so it is very suitable for large-scale industrial use.

The invention discloses a method for producing needle coke by adopting the technique combining delay coking and kettle-type coking. The method comprises: when treating the conventional coking raw material by using the delay coking technique, introducing FCC slurry oil into a delay coking tower from the upper part inside the tower at the low temperature, and obtaining needle coke raw material by fractionating high temperature oil gas obtained by the reaction; and then, treating the needle coke raw material by using the kettle-type coking technique, and obtaining high quality needle coke. In the method, as the FCC slurry oil is injected into the coking tower at the lower temperature, the decomposition temperature of the conventional coking raw material is lowered, the high temperature decomposition time of the raw material is shortened, the occurrence of secondary reaction is reduced, green coke rate is reduced, the stable operation cycle of a signal tower is prolonged, and light components which have high reaction activity and are not beneficial to producing the needle coke, heavy components with high polymerization activity, and a great deal of impurities such as catalyst powder, heavy metal and the like can be removed. The obtained needle coke has high yield and good quality.

A low-quality heavy oil suspension bed hydrogenation catalyst and its preparation and use method, in particular to a low-quality heavy oil suspension bed hydrogenation solid powder catalyst with sub-molten salt activated bauxite ore powder as a carrier and its preparation and use method . It is characterized in that the catalyst uses activated bauxite ore powder as a carrier, and one or several transition metals in VIB and VIII groups are loaded on it. The low-quality heavy oil hydrogenation catalyst prepared by the present invention has high catalytic activity and low coke formation rate for the hydrogenation and upgrading of low-quality heavy oil, and the source of raw materials is wide and the price is low, which can greatly reduce the preparation cost of the catalyst and hydrogenation The operating cost of the process has broad application prospects.

The invention discloses a suspended bed hydrocracking catalyst for inferior heavy oil and a preparation method of the catalyst. The catalyst comprises zinc oxide powder, vulcanized kaolin powder and vulcanized iron-containing ore powder, wherein the content of the vulcanized kaolin powder is 15.0-60.0 wt%, the content of the vulcanized iron-containing ore powder is 15.0-55.0 wt%, the content of zinc oxide powder is 15.0-50.0 wt%, and the kaolin powder, the iron-containing ore powder and the zinc oxide are mixed dryly. The catalyst has low coke rate, high desulfurization rate, strong resistanceto impurities such as sulfur, metal, nitrogen, carbon residues and the like, and is used for the suspended bed hydrocracking reaction of the inferior heavy oil.

The invention discloses a hydrocracking catalyst for a vacuum residue suspension bed and a preparation method and a use method thereof. The hydrocracking catalyst for the vacuum residue suspension bed is prepared by the following step of: selecting iron pyrite of which the mass percentage content of iron is 40-50 percent for serving as a raw material. The hydrocracking catalyst for the vacuum residue suspension bed is prepared from a cheap iron pyrite raw material, and has the advantages of wide raw material source and simple treatment and preparation processes; the coke yield is low and the fraction yield is high under a low pressure condition; generated coke can suspend in liquefaction oil without being attached to the inner wall of a high-pressure electromagnetic stirring reaction kettle, so that blockage of a reactor and a pipeline in an industrial device is prevented; hydrogenation lightening is performed on vacuum residues through a two-section reaction, the temperature is controlled stably, the phenomenon of violent temperature rise in a hydrogenation lightening process of vacuum residues is avoided, and the coke yield is further suppressed; and a foundation is laid for the industrialization of a vacuum residue suspension bed hydrocracking technology.

The invention discloses a method of processing highly-acidic crude oil through the delayed coking process; the method includes that the low temperature highly-acidic crude oil is fed from the middle-lower part and the high temperature low-acidic coking raw material is fed from the bottom; the high temperature oil gas generated by the high temperature cracking of the low-acidic coking raw materialis mixed with the low temperature highly-acidic crude oil so that the highly-acidic crude oil is enabled to realize the purpose of the deacidification through the pyrolysis deacidification under hightemperature; meanwhile, the cracking temperature of the low-acidic coking raw material is lowered; the high temperature cracking time of the conventional raw materials; thereby, the coking yield is reduced and the stable operation period of the single tower is prolonged; besides, the preheating temperature of the highly-acidic crude oil can avoid the strong corrosion stage of the acid; the corrosion on the heating device caused by the acid can be reduced or avoided when the temperature is even lower than the corrosion temperature.