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Mg-Al hydrotalcite-like compound catalyst for treating residual oil and extra heavy oil material and preparation method of Mg-Al hydrotalcite-like compound catalyst

A hydrotalcite and catalyst technology, applied in the field of Mg-Al hydrotalcite catalyst and its preparation, can solve problems such as difficulty and achieve the effects of strong hydrothermal resistance, high liquid yield, and realization of resource value

Inactive Publication Date: 2017-09-01
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned catalysts are difficult to be used in pure residual oil feed with aromatics content and colloid content of about 35% and carbon residue as high as 15%.

Method used

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  • Mg-Al hydrotalcite-like compound catalyst for treating residual oil and extra heavy oil material and preparation method of Mg-Al hydrotalcite-like compound catalyst
  • Mg-Al hydrotalcite-like compound catalyst for treating residual oil and extra heavy oil material and preparation method of Mg-Al hydrotalcite-like compound catalyst
  • Mg-Al hydrotalcite-like compound catalyst for treating residual oil and extra heavy oil material and preparation method of Mg-Al hydrotalcite-like compound catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1, co-precipitation method prepares Mg-Al hydrotalcites

[0077] (1) Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is formulated as an aqueous solution at a Mg / Al molar ratio of 3:1.

[0078] (2) Weigh a certain amount of Na 2 CO 3 and NaOH dissolved in deionized water to form a mixed solution, where n(CO 3 2- ) / n(A1 3+ )=2, n(NaOH) / n(Mg 2+ +Al 3+ )=2, n refers to the number of moles.

[0079] (3) Pour the above two solutions into deionized water evenly, keep the temperature at 70° C., stir vigorously, and keep the pH at 11.

[0080] (4) Continue aging at 70° C. for 16 hours, filter and wash until the pH value is 7.

[0081] (5) Dry at 80°C for 12 hours to obtain the Mg-Al hydrotalcite-like material.

[0082] (6) Pour 75g of aluminum sol and 25g of kaolin into a 1000ml beaker to mix, add 500g of deionized water to make a slurry, and stir evenly; then slowly and uninterruptedly pour 36ml of 34% nitric acid, continue to stir for 1 hour, and then sta...

Embodiment 2

[0085] Embodiment 2, preparation of Mg-Al hydrotalcites by hydrothermal method

[0086] Steps (1)-(3), (6)-(8) are the same as in Example 1, except that:

[0087] (4) Crystallize the reaction slurry obtained above in a high-pressure reactor at a temperature of 115° C. for 24 hours, filter and wash until the pH value is 7.

[0088] (5) Dry at 80°C for 12 hours to obtain Mg-Al hydrotalcite-like material.

[0089] The catalyst obtained in this example is designated as Cat-II.

Embodiment 3

[0090] Embodiment 3, the Cat-1 catalyst prepared by embodiment 1 is used to treat Daria vacuum residue

[0091] The basic properties of Daria vacuum residue are shown in Table 1.

[0092] Table 1 Daria Vacuum Residue

[0093]

[0094]

[0095] Proceed as follows:

[0096] Use dry gas to lift the vacuum residue, and carry out catalytic cracking in the riser reactor, where the temperature is 525°C, the ratio of agent to oil is 5, and the pressure is 0.2Mpa. Then, the oil and gas in the spent catalyst are stripped through the stripping section, and the oil and gas are separated from the spent catalyst in a settler to obtain the spent catalyst and reaction oil and gas.

[0097] The catalyst to be regenerated enters the regenerator through the inclined pipe to be regenerated. The regeneration gas is a mixture of water vapor and air (the volume ratio of the two is 1:5.5), the temperature is 880 ° C, and the pressure is 0.3 MPa. The regenerated catalyst is regenerated The in...

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Abstract

The invention discloses an Mg-Al hydrotalcite-like compound catalyst for treating residual oil and extra heavy oil material and a preparation method of the Mg-Al hydrotalcite-like compound catalyst. The preparation method of the catalyst comprises the following steps: preparing a mixed aqueous solution of magnesium nitrate and aluminum nitrate; preparing an alkaline aqueous solution of sodium carbonate and sodium hydroxide; moreover, adding the mixed aqueous solution and the alkaline aqueous solution into water, stirring under the condition of keeping the pH value to be 9 to 12, and then performing preparation to obtain an Mg-Al hydrotalcite-like material; mixing the Mg-Al hydrotalcite-like material with size of clay and a binding agent, and sequentially performing spray drying and calcination, so as to obtain the Mg-Al hydrotalcite-like compound catalyst. The Mg-Al hydrotalcite-like compound catalyst can be directly used for the production of high quality gasoline and diesel oil through conventional catalytic cracking, is high in water-heat resistance, can be applied to a one-step method diesel oil preparation technology or the production of chemical products, such as olefin or arene, and realizes the maximum utilization of the resource value, moreover, synthesis gas with the H / C ratio being approximately 1 is prepared from a mixture of vapour and water as regeneration gas by adopting a vaporization and regeneration technology.

Description

technical field [0001] The invention relates to a Mg-Al hydrotalcite catalyst used for treating residual oil and super heavy oil raw materials and a preparation method thereof, belonging to the technical field of oil refining and chemical industry. Background technique [0002] With the depletion of light oil resources worldwide, the trend of heavy crude oil in the world has made refineries increasingly desire to convert heavy residue oil into light, high-priced products. [0003] In my country, catalytic cracking has become the most important petroleum secondary processing method due to its flexible operation, high light oil yield, and low investment and operating costs. It can process vacuum wax oil and part of vacuum residue. At present, acidic molecular sieve catalysts are mostly used in conventional catalytic cracking, and the feed is usually a mixture of vacuum gas oil and vacuum residue, of which the vacuum residue is only 20-30%, and it is impossible to directly proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/10B01J27/236C10G11/02
CPCB01J23/007B01J23/02C10G11/02C10G2300/70
Inventor 吴青吴晶晶
Owner CHINA NAT OFFSHORE OIL CORP
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