Naphtha hydroisomerization conversion method
A hydroisomerization and hydroisomerization technology, applied in chemical instruments and methods, petroleum industry, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high content of aromatic hydrocarbons, high energy consumption, The complex process and other problems can achieve the effect of low aromatics content, lower investment cost and simple process.
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specific Embodiment approach
[0051] The naphtha raw material 1 and the mixed gas 11 are introduced into the hydroisomerization reactor 3 to carry out the hydroisomerization reaction, and the hydroisomerization stream 4 obtained after the reaction enters the gas-liquid separation device 5 for separation, and obtains a rich Hydrogen gas 8, liquefied gas 7, and isomerized gasoline 6, among which, most of hydrogen-rich gas 8 is mixed with new hydrogen 2 as recycle gas 10 to form mixed gas 11 and enters hydroisomerization reactor 3, and a small part is used as dry gas 9 is used as a fuel gas delivery device, and liquefied gas 7 and isomerized gasoline 6 are used as product output devices.
[0052] The aforementioned naphtha hydroisomerization method provided by the present invention also has the following specific advantages:
[0053] The by-product liquefied gas rich in carbon four components can be separated by rectification or adsorption to obtain chemical products such as isobutane, n-butane and propane, a...
preparation example 1
[0056] This preparation example prepares 25.0% by weight of WO 3 -Amorphous silica-alumina and alumina composite support with 7.0% by weight of NiO (based on the total weight of the support, amorphous silica-alumina accounts for 70% by weight and alumina accounts for 30% by weight) hydroisomerization catalyst.
[0057] Weigh 140g amorphous silicon aluminum (SiO 2 Content 40% by weight), 60g aluminum oxide, 6g scallop powder, and they are ground and mixed evenly, add about 220ml concentration and be the dilute nitric acid solution of 2.7g / 100ml, stir into the jelly thing of uniform humidity, extrude on extruder into strips with a diameter of 2.0mm, dried at 120°C for 6h, heated at 3.0°C / min to 600°C, and roasted at a constant temperature of 3h in air atmosphere to make a hydroisomerization carrier, numbered as carrier 1 (wherein Alumina as γ-Al 2 o 3 ).
[0058] The nickel-tungsten metal element is impregnated on the carrier 1 by a saturated impregnation method. Firstly, t...
preparation example 2
[0060] This preparation example prepares 22.0% by weight of WO 3 β molecular sieve and alumina composite carrier with 4.5% by weight of NiO (based on the total weight of the carrier, β molecular sieve accounts for 55% by weight and alumina accounts for 45% by weight) hydroisomerization catalyst.
[0061] Catalyst 2 is prepared in a method similar to that of Preparation Example 1, wherein the SiO of the β molecular sieve 2 / Al 2 o 3 The molar ratio was 45.8.
[0062] The number of the hydroisomerization catalyst obtained in this preparation example is Catalyst 2, and its properties are shown in Table 1.
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