Method for producing high grade low condensation diesel oil from distillate oil
A distillate oil, high-quality technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problem that the activity of the hydrofining catalyst is difficult to be fully utilized, the temperature difference of the reaction temperature of the pour point depressing catalyst bed is large, and the temperature drop It is impossible to achieve synchronous deactivation of coagulation catalysts, etc., to achieve the effects of small reaction temperature difference, good activity and selectivity, and good product properties
Active Publication Date: 2006-05-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
This method has the following disadvantages: (1) the activity of the hydrorefining catalyst is difficult to be brought into full play; (2) the reaction temperature is high, the yield of diesel oil is low, and the deactivation speed of the catalyst is fast; (3) the deactivation rate of the catalyst is high; The temperature difference of the reaction temperature is large, and the upper temperature is high, resulting in excessive cracking of the oil, so that the selectivity of the depressing catalyst cannot be fully exerted, and at the same time, it is impossible to achieve simultaneous deactivation of the deactivating catalyst
(4) Although the patent uses anti-NH 3 and H 2 S catalyst with better performance, but NH 3 and H 2 The influence of S on the performance of the pour point depressing catalyst is still relatively large
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[0016] The hydrofinishing reaction zone of the present invention can adopt conventional hydrofinishing catalyst, with gamma-Al 2 o 3 or contain a small amount of SiO 2 γ-Al 2 o 3 As a carrier, the catalyst active component is a VIB group component and a VIII group component in the periodic table of elements, preferably W (or Mo) and Ni are active metal components. Based on the weight percentage of the catalyst, if WO 3 (or MoO 3 ) content of 15-30%, NiO 4-12%, the effect is better. The brief process of the preparation of the hydrorefining catalyst can be as follows: spray and immerse the pre-prepared alumina or a small amount of SiO2 with an aqueous solution containing the catalytically active metal component. 2 alumina carrier, then dried and calcined.
[0017] Conventional hydrodepreciation catalysts can be used in the hydrodepreciation section, with ZSM molecular sieve and γ-Al 2 o 3 or contain a small amount of SiO 2 γ-Al 2 o 3 Together as a carrier, the active...
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The invention discloses the method of producing the high grade diesel oil by distillate oil. The method comprises the hydrofining reaction area, on the top of which there is flash zone and on the bottom of which there is hydrodewaxing zone, and hydrodewaxing area which is injected hot hydrogen gas at the bottom. The method comprises the following characteristics: the method making the temperature of hydrofining reaction area lower, making the differential temperature of hydrodewaxing area smaller, making full use of the hydrogenation activity of refined catalyst and selectivity of pour point depression catalyst, slowing the inactivation speed of catalyst, and improving the productivity of diesel oil and production quality.
Description
technical field [0001] The invention relates to a method for producing diesel oil, in particular to a method for producing high-quality low-condensation diesel oil from inferior distillate oil. Background technique [0002] At present, the common method of processing low-quality distillate oil is hydrofining. This process has low investment and mature technology. It is an important means to improve the quality of oil products. It has been widely used in industry. The commonly used hydrofining catalyst is γ-Al 2 o 3 as carrier matrix, containing MoO 3 (or WO 3 ) 10-25% (weight), NiO (or CoO) 3-5% (weight). However, this process has the disadvantage that it cannot effectively reduce the freezing point of diesel oil to produce low-condensation high-quality diesel oil. [0003] However, the hydrogen decondensation process can make use of the unique pores and appropriate acidic centers of the molecular sieve catalyst under the condition of hydrogen, at a certain temperature a...
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Inventor 李永泰孟祥兰张宝香高鹏
Owner CHINA PETROLEUM & CHEM CORP