Isomerization dewaxing catalyst and its prepn.

A technology of isomerization dewaxing and catalyst, which is applied in petroleum wax recovery, petroleum industry, hydrocarbon oil treatment, etc., and can solve the problems of low activity and selectivity, weak catalyst acidity, etc.

Inactive Publication Date: 2003-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] U.S. Patents USP.No.5,833,837, 5,817,907, 5,990,371, and 5,135,638 all report the use of isomerization dewaxing technology to produce lubricating oil base oils, and the most used material is SAP0-11, because this molecular sieve has acid centers with moderate strength and The pore structure matches the wax molecule (one-dimensional non-intersecting 10-membered ring elliptical channel with a pore size of 0.39×0.64nm, which has obvious space restrictions for multi-branched isomers), but due to the , especially when the active metal component is loaded, most of the acid centers are covered, and the catalyst obtained is weaker in acidity, lower in activity and selectivity, as demonstrated in the examples

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present invention is not limited to the following examples. The synthesis of embodiment 1SAPO-11 molecular sieve

[0030] The SAPO-11 molecular sieve was synthesized according to the method reported in the existing literature. Mix 230 grams of 85w% orthophosphoric acid with 300 grams of deionized water, then add 410 grams of aluminum isopropoxide, stir until uniform, then add 208 grams of ethyl orthosilicate, 91 grams of diisopropylamine, and 78 grams of pyridine , 400 grams of n-hexanol and 420 grams of deionized water and fully stirred to obtain a gel.

[0031] The above gel was sealed in an autoclave lined with polytetrafluoroethylene, crystallized at a constant temperature of 190°C for 48 hours, and the solid obtained by filtering the product was washed with water, dried at 110°C for 4 hours, and then subjected to X-ray powder diffraction measurement. Table 1 column data.

[0032] Table 1Peak No. 2Theta(°) d-value 100×I / I 0 1 ...

Embodiment 2

[0033] X-ray diffraction measurement adopts Rigaku D / MAX-RA X-ray diffractometer, radiation source is copper target, graphite single crystal filter, operating tube voltage is 35KV, tube current is 30-50mA, scanning speed (2θ) is 4 degrees / points, the scanning range is 4 to 35 degrees. A kind of preparation method 1 of catalyst among the embodiment 2 present invention

[0034] (1) Get SAPO-11 molecular sieve 200g, pseudo-boehmite (dry basis 72w%) 900g and citric acid 30g and mix uniformly;

[0035] (2) Measure 270ml of water and 70ml of acetic acid and mix evenly, then add 210g of SB powder (70w% on a dry basis) to the mixed solution, stir for 20min, and prepare an adhesive;

[0036] (3) Fully knead the mixed powder obtained in step (1), the adhesive obtained in step (2) and an appropriate amount of water on a roller compactor to make it a paste-like plastic, and the extruded diameter on the extruder is 1.5 mm cylindrical bars;

[0037] (4) Dry the cylindrical bar obtained ...

Embodiment 3

[0039] (6) Take 150 grams of carrier Sa respectively 2 and Sb 2 , saturated impregnation with chloroplatinic acid solution, then dried at 110°C for 6 hours, and calcined at 480°C in air atmosphere for 4 hours to prepare comparative catalysts Ca containing 1.0w% Pt 2 and the inventive catalyst Cb containing 1.0w% Pt 2 , see Table 2 for properties. A kind of preparation method 2 of catalyst among the embodiment 3 present invention

[0040] (1) get SAPO-11 molecular sieve 425g, boehmite (dry basis 72w%) 590g and graphite powder 20g mix homogeneously;

[0041] (2) Measure 220ml of water and 60 grams of oxalic acid and stir to dissolve, then add 210g of SB powder (70w% on a dry basis) to the oxalic acid solution, stir for 20min, and prepare an adhesive;

[0042] (3) Fully knead the mixed powder obtained in step (1), the adhesive obtained in step (2) and an appropriate amount of water on a roller compactor to make it a paste-like plastic, and the extruded diameter on the extrude...

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Abstract

The present invention discloses one kind of isomerizing and dewaxing catalyst for lubricant oil production and its preparation. Specifically, SAPO-11 as acid component and organic matter are used tomodify prepared catalyst carrier and to protect the medium strength acid centers on the carrier, and the dried carrier is loaded with active metal component and high temperature roasted to release its protected acid centers and to produce the catalyst of the present invention. The catalyst is used for the isomerizing and dewaxing reaction of lubricant oil fraction in the presence of hydrogen, and has the advantages of high yield of lubricant oil base oil, low product pour point, high viscosity index and other advantages.

Description

1. Technical field [0001] The invention discloses a isomerization dewaxing catalyst for producing lubricating oil base oil and a preparation method thereof. The catalyst of the invention is used for the isomerization reaction of wax in lubricating oil fractions under the presence of hydrogen, and has the characteristics of high yield of lubricating oil base oil, low pour point, high viscosity index and the like. 2. Background technology [0002] The lubricating oil fraction contains a large amount of macromolecular linear or less branched alkanes (here called waxes) with higher melting point, so it has high pour point, low viscosity index and poor low temperature performance. Therefore, it is necessary to remove the high melting point wax. At present, the commonly used dewaxing methods mainly include solvent dewaxing, catalytic dewaxing and isomeric dewaxing. [0003] Solvent dewaxing is to use the solubility of wax in solvent to remove it. The disadvantage of this method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/02C10G73/02
Inventor 刘全杰杨军彭焱王伟
Owner CHINA PETROLEUM & CHEM CORP
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