62results about How to "Solve the problem of not being able to operate stably for a long period of time" patented technology

The invention relates to a hydrogenation method for producing a motor fuel from biological grease. The method comprises the following steps: 1, allowing hydrogen and raw oil which comprises one or more of biological grease to go through at least two hydrogenation reactors under hydrogenation operation conditions: allowing the raw oil and hydrogen to firstly go through a low temperature operation hydrogenation reactor and then go through a high temperature operation hydrogenation reactor, wherein the active component of a hydrogenation catalyst in a reaction state comprises one or several of W, Mo, Ni and Co; 2, separating a hydrogenation effluent into a gas phase which is circularly used and a liquid phase which enters a fractionating tower; and 3, supplying a sulfur-containing substance to reaction materials to maintain the content of hydrogen sulfide in the circulation gas. Compared with the prior art, the method of the invention can effectively improve the storage stability of the biological grease as fuel oil and also can effectively prolong the stability of a hydrogenation device.

The invention relates to a hydrogenation method for producing high-quality low-condensation-point diesel oil. The hydrogenation method comprises the steps that firstly, under the condition of hydrogenation, biolipid and recycle hydrogen are mixed and pass through a hydrotreating reaction zone, the gas obtained by separating a hydrotreating generated material flow is recycled, the liquid obtained by separation, the raw diesel oil and the recycle hydrogen are mixed and pass through a hydrofining reaction zone and then enter a hydro-upgrading reaction zone at least comprising hydrogenation catalysts with isomerization performance, and the liquid obtained by separating a hydro-upgrading generated material flow is continuously fractionated, thus obtaining naphtha and low-condensation-point diesel oil products, wherein in the reaction state, the hydrogenation active components of the hydrogenation catalysts used in the hydrotreating reaction zone are one or more of W, Mo, Ni and Co in the sulfuration state. Compared with the prior art, the method has the advantages that not only can the storage stability of the biolipid as fuel oil be effectively improved but also the high-quality low-condensation-point clean diesel oil can be directly produced.

The present invention relates to a hydrogenation method for producing a high quality motor fuel by biolipid. The method comprises that: one or a plurality of materials in the biolipid are adopted as raw material oil; under a hydrogenation operating condition, the raw material oil and hydrogen gas pass through at least two hydrogenation reactors, wherein the raw material oil and the hydrogen gas firstly pass through the low temperature operation hydrogenation reactor, and then pass through the high temperature operation hydrogenation reactor; under the reaction state, the active component of a hydrogenation catalyst is reduced into the reduced-state Pt and/or the reduced-state Pd; the hydrogenated effluent is separated into a gas phase and a liquid phase, wherein the gas phase is recycled, and the liquid phase enters a fractionating tower; the liquid phase is fractionated in the fractionating tower to obtain naphtha, diesel oil and unconverted oil, wherein the partial diesel oil and/or the partial unconverted oil circularly returns to the reaction system. Compared to the prior art, with the method of the present invention, the storage stability of the biolipid can be effectively improved when the biolipid is adopted as the fuel oil, the stability of the hydrogenation device can be effectively prolonged, and the industrial application value of the biolipid hydrogenation technology can be improved.

The invention relates to a two-stage hydrogenation method for producing a high quality low freezing point motor fuel from a biological oil. The method is characterized in that a biological oil raw material and hydrogen pass through a first stage hydrogenation reaction zone containing at least two hydrogenation reactors, wherein the mixture passes through a low temperature operation reactor, and then passes through a high temperature operation reactor; the hydrogen-rich gas is recycled at the first stage; the liquid enters a second stage hydrogenation modification reaction zone; the sub-hydrogen gas after hydrogenation modification is recycled at the second stage; the liquid product is subjected to fractionation to obtain naphtha and a low freezing point diesel oil; and under a reaction state, active components of the hydrogenation catalyst used at the first stage are reduction state Pt and/or Pd, and active components of the hydrogenation catalyst used at the second stage are one or a plurality of materials selected from sulfurization state W, Mo, Ni and Co. Compared to the method in the prior art, the method of the present invention has the following advantages that: a low freezing point motor fuel can be produced, activity stability of the catalyst can be ensured, and stable and long period device operation can be ensured.

The invention relates to a hydrogenation method for producing motor fuel from biological oil. The hydrogenation method for producing motor fuel from biological oil is characterized in that at least one biological oil is utilized as raw oil; the raw oil and hydrogen orderly pass through a hydrotreatment reactor running at a low temperature and a hydrotreatment reactor running at a high temperature at least under hydrogenation operation conditions; under reaction conditions, active ingredients of a hydrotreatment catalyst comprise one or more of reduced W, Mo, Ni and Co; hydrogenated effluent is separated into a gas phase and a liquid phase; the gas phase is recycled and the liquid phase is fed into a fractionating tower; naphtha, diesel oil and unconverted oil are obtained in the fractionating tower; and a part of the diesel oil and/or a part of the unconverted oil are circulated to a reaction system. Compared with the prior art, the hydrogenation method for producing motor fuel from biological oil can effectively improve storage stability of biological oil as fuel oil and effectively prolong hydrogenation device stability.

The present invention relates to a two-stage hydrogenation method for producing a low freezing point motor fuel. The method is characterized in that a biological oil raw material and hydrogen pass through a first stage hydrogenation reaction zone containing at least two hydrogenation reactors, wherein the mixture passes through a low temperature operation reactor, and then passes through a high temperature operation reactor; the hydrogen-rich gas is recycled at the first stage; the liquid enters a second stage hydrogenation modification reaction zone; the sub-hydrogen gas after hydrogenation modification is recycled at the second stage; the liquid product is subjected to fractionation to obtain naphtha and a low freezing point diesel oil; and under a reaction state, active components of the hydrogenation catalyst used at the first stage are one or a plurality of materials selected from sulfurization state W, Mo, Ni and Co, and active components of the hydrogenation catalyst used at the second stage are one or a plurality of materials selected from reduction state W, Mo, Ni and Co. Compared to the method in the prior art, the method of the present invention has the following advantages that: a low freezing point motor fuel can be produced, activity stability of the catalyst can be ensured, and stable and long period device operation can be ensured.

The present invention relates to a two-stage hydrogenation method for producing a high quality low freezing point motor fuel. The method is characterized in that a biological oil is adopted as a raw material oil; under a hydrogenation condition, the raw material oil and hydrogen are mixed, and pass through a first stage hydrogenation reaction zone; the stream generated from hydrogenation is separated to obtain hydrogen-rich gas; the hydrogen-rich gas is recycled at the first stage; the separated liquid enters a second stage hydrogenation modification reaction zone; the sub-hydrogen gas separated from the oil generated through second stage hydrogenation is recycled at the second stage; and the separated liquid product is subjected to fractionation to obtain naphtha and a low freezing point diesel oil, wherein hydrogenation activity components of the hydrogenation catalyst used at the first stage are one or a plurality of materials selected from sulfurization state W, Mo, Ni and Co and hydrogenation activity components of the hydrogenation catalyst used at the second stage are reduction state Pt and/or Pd under a reaction state. Compared to the method in the prior art, the two-stage hydrogenation method of the present invention has the following characteristics that: the low freezing point motor fuel can be produced, activity stability of the catalyst can be ensured, and stable and long period device operation can be ensured.

The invention discloses a conversion method of heavy and residual oil suspension bed hydrogenation. The method comprises the steps as follows: a feeding flow containing hydrogen and heavy and residual oil passes through a honeycomb-shaped or similar structure integrated reactor of a hydrogenation catalyst; the linear speed of liquid and gas in a hollow tower is controlled and a taylor flow is formed in the structural integrated reactor; and as the gas and the liquid are uniformly distributed in each passage, better gas-liquid distribution can be formed, the catalytic efficiency of the reactor can be greatly improved, and the running period can be effectively prolonged.

The invention discloses a method for hydrodeoxygenation of vegetable oil. The method comprises the following steps: (1) biological oil enters a thermal high-pressure separator to be in contact with acatalyst 1 filled in the thermal high-pressure separator to perform olefin saturation and shallow hydrodeoxygenation reaction; (2) a gas-phase effluent at the top of the thermal high-pressure separator can be recycled as supplementary hydrogen, a liquid-phase effluent enters a fractionating tower, and gasoline, diesel oil and unconverted oil are obtained through separation; and (3) the unconvertedoil and hydrogen are mixed to enter a hydro-upgrading reactor to carry out deep hydrodeoxygenation reaction and isomery pour point depression, and an effluent enters the thermal high-pressure separator. The method can ensure the activity stability of the catalyst and the long-period stable operation of the device while producing the low-condensation-point diesel oil blending component, and has the advantages of low production cost and simple operation.

The present invention relates to a two-stage hydrogenation method for producing a low freezing point motor fuel from a biological oil. The method is characterized in that a biological oil is adopted as a raw material oil; under a hydrogenation condition, the raw material oil and hydrogen are mixed, and pass through a first stage hydrogenation reaction zone; hydrogen-rich gas separated from a stream generated through hydrogenation is recycled at the first stage; the separated liquid enters a second stage hydrogenation modification reaction zone; and sub-hydrogen gas separated from the oil generated through second stage hydrogenation is recycled at the second stage, and the separated liquid product is subjected to fractionation to obtain naphtha and a low freezing point motor fuel, wherein hydrogenation activity components of the hydrogenation catalyst used at the first stage are one or a plurality of materials selected from reduction state W, Mo, Ni and Co, and hydrogenation activity components of the hydrogenation catalyst used at the second stage are one or a plurality of materials selected from sulfurization state W, Mo, Ni and Co under a reaction state. Compared with the method in the prior art, the method of the present invention has the following advantages that: a low freezing point motor fuel can be produced, activity stability of the catalyst can be ensured, and stable and long period device operation can be ensured.