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Method for preparing paraffin hydrocarbon shape-selective isomerization catalyst

A catalyst and isomerization technology, which is applied in the field of preparation of paraffin hydrocarbon type-selective isomerization catalysts, can solve the problems of low activity and selectivity, weak catalyst acidity, and easy cracking

Active Publication Date: 2016-04-27
SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned materials have acid centers with moderate strength and pore structures that match wax molecules, and have obvious space restrictions on multi-branched isomers, they can all cause isomerization reactions of paraffins to a certain extent, but due to In the process of catalyst preparation, most of the acidic centers will be covered, and the obtained catalyst is weak in acidity, low in activity and selectivity. In addition, the stability of the catalyst is closely related to its acidity, and the catalyst with strong acidity is resistant to sulfur and nitrogen poisoning. Strong ability and good stability, but it is also more prone to side reactions such as cracking

Method used

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  • Method for preparing paraffin hydrocarbon shape-selective isomerization catalyst
  • Method for preparing paraffin hydrocarbon shape-selective isomerization catalyst
  • Method for preparing paraffin hydrocarbon shape-selective isomerization catalyst

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Dissolve chloroplatinic acid containing 0.3 grams of platinum in 6 grams of water, fully mix 10 grams of 200-mesh cellulose with the above solution, and dry the mixture at 80°C for 6 hours to obtain platinum-loaded cellulose.

[0028] (2) 45 grams of ZSM-22, 72 grams of aluminum hydroxide dry rubber powder (SB produced by Condean, Germany, 76% on a dry basis), the platinum-loaded cellulose prepared in step (1), and 50 ml of cellulose with a concentration of 0.2M The nitric acid solution and 30ml of water are fully mixed and kneaded to make it into a paste-like plastic, and a cylindrical strip with a diameter of 1.5mm is formed on an extruder, and the cylindrical strip is dried at 110°C for 8 hours, and then roasted at 650°C for 4 hours in an air atmosphere Get a catalyst. The pore volume of the catalyst with a pore diameter of 1-10nm accounts for 7.4% of the total pore volume, and the pore volume of 100-1000nm accounts for 46.6% of the total pore volume.

Embodiment 2~8

[0030] With embodiment 1, difference is that the kind and consumption of various substances are adjusted in each step, and the composition of catalyst is different, and each embodiment catalyst number is respectively E-2~E-8, and evaluation condition is the same as embodiment 1, The pore-forming dosage and catalyst composition used in the catalysts of each embodiment are shown in Table 2, and the evaluation results are shown in Table 3.

Embodiment 9

[0036] E1~E8 and C1~C2 were evaluated for catalyst performance, and the evaluation conditions were as follows: take 10ml of catalyst, dilute it with 10ml of quartz sand, fill it into a fixed-bed micro-continuous reactor, and evaluate its catalytic activity. Before the evaluation, under the conditions of pressure 1MPa and temperature 200°C, pure hydrogen was introduced at a rate of 800 gas volume ratio (the volume ratio of the gas entering to the loading volume of the catalyst), and the temperature was raised to 320°C for 4 hours. Carry out catalyst activation; Then, under constant pressure and temperature, the molar ratio of hydrogen to hydrocarbon is adjusted to 4, and the volume space velocity is 1.0h -1 Enter the raw materials shown in Table 1, carry out catalyst activity evaluation, get the product of reacting for 4 hours and analyze, the composition of catalyst is shown in Table 2, and the evaluation results are shown in Table 3.

[0037] Table 2 The amount of pore formin...

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Abstract

The invention discloses a method for preparing a paraffin hydrocarbon shape-selective isomerization catalyst. The method comprises the following steps: 1) active ingredients are loaded to a macropore pore-forming agent, then the active ingredients are dried to obtain a modified pore-forming agent; and 2) a TON-type small grain molecular sieve, a refractory oxide, the modified pore-forming agent, a peptizing agent and water are mixed, a mixture is shaped, dried, and calcinated to obtain the catalyst product. The method has the advantages of simple process flow and low cost, and the catalyst product used in a paraffin hydrocarbon shape-selective hydrocarbon reaction has the characteristics of high target product yield and low pour point.

Description

technical field [0001] The invention relates to a preparation method of a paraffin hydrocarbon type-selective isomerization catalyst. Background technique [0002] Waxy raw oils, especially heavy distillate oils derived from paraffin-based crude oils, contain more waxes, have higher freezing points, and poor low-temperature fluidity. During storage, transportation, and use, the oil will Thickening, even solidification, thereby blocking the oil pipeline and interrupting the oil supply to the engine to cause engine failure. At present, there are many methods to solve various problems caused by solidification of waxy heavy distillate oil, and the main method is dewaxing, including solvent dewaxing, catalytic dewaxing and isomerization dewaxing. [0003] Solvent dewaxing is to use the solubility of wax in solvent to remove it. The disadvantage of this method is that it is difficult to choose solvent, waste a lot of organic solvent, it is harmful to human body and pollute the en...

Claims

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Application Information

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IPC IPC(8): B01J29/74B01J35/10C10G45/64C10M177/00
Inventor 刘全杰徐会青贾立明王伟
Owner SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEM
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