Modified zeolite molecular sieve as well as preparation method and application thereof

A zeolite molecular sieve and molecular sieve technology, applied in the field of petroleum exploration, can solve the problems of large diffusion resistance, difficulty in escaping, and long retention time, and achieve the effects of simple operation, increased micropore size, and high purity

Active Publication Date: 2019-02-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The retention time of 17αhopane in 22R configuration is relatively longer than that of 22S 17αhopane because it is easier to enter the interior of molecular sieves, and 17αhopane, norhopane and 17βhopane, which lack long chains, are also hindered in molecular sieves. Relatively difficult to elute, they are incompletely eluted by isooctane together with 17αhopane of 22R
However, for the enrichment targets whose size is larger than the pore size, on the one hand, it is difficult to enter the pores, and on the other hand, after adsorption in the pores, the diffusion resistance is relatively large, and it is not easy to escape, which leads to certain types of commercial molecular sieves being sensitive to certain compounds. Enrichment effect is not good (Zhang Yu, Wang Hongguo, and Song Lijuan, Progress in Synthesis of Microporous-Mesopore Composite Molecular Sieves. Chemical Science and Technology, 2010(03): p.60-64.)

Method used

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  • Modified zeolite molecular sieve as well as preparation method and application thereof
  • Modified zeolite molecular sieve as well as preparation method and application thereof
  • Modified zeolite molecular sieve as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment firstly provides a kind of zeolite molecular sieve, and it is prepared through the following steps:

[0051] Take 5g of 13X molecular sieve, add it to 80mL oxalic acid ethanol solution with a concentration of 0.1mol / L, stir at 50°C for 2h at 20rpm, then filter with suction, wash until neutral, activate at 450°C for 8h, and Cool in a desiccator for later use.

[0052] This embodiment also provides a method for enriching hopane in geological samples, such as figure 1 As shown, it specifically includes the following steps:

[0053] Preparation of saturated hydrocarbon components

[0054] The bitumen A sample or petroleum sample obtained by extracting rock samples is separated by silica gel column or silica gel / alumina column chromatography to obtain saturated hydrocarbon components; the saturated hydrocarbon components are blown to dryness with nitrogen at room temperature and weighed.

[0055] Molecular Sieve Chromatographic Column Adsorption of Hopanes...

Embodiment 2

[0067] In this example, the isothermal adsorption test was carried out on unmodified 13X molecular sieve, 13X molecular sieve modified with oxalic acid for 2 hours, and 13X molecular sieve modified with oxalic acid for 8 hours. The average pore size of the molecular sieve increased from 0.6685nm unmodified to modified 0.9200nm for 8 hours. Depend on Figure 3a , Figure 3b , Figure 3c , Figure 4a , Figure 4b , Figure 4c , Figure 5a , Figure 5b ,and Figure 5c It can be seen that the modified molecular sieve retains the original structural features of the molecular sieve, and the pores of the modified molecular sieve can be enlarged as required.

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Abstract

The invention provides a modified zeolite molecular sieve as well as a preparation method and application thereof. The modified zeolite molecular sieve is obtained through modification treatment on anX type molecular sieve, wherein the modification treatment refers to the modification on the X type molecular sieve in an organic acid alcoholic solution. The zeolite molecular sieve provided by theinvention can be used as an adsorption agent for hopance in a geological sample, and is used for enriching the hopance in the geological sample. The zeolite molecular sieve can be subjected to effective and controllable modification according to requirements.

Description

technical field [0001] The invention relates to an enrichment method, in particular to a method for enriching hopane in geological samples, and belongs to the technical field of petroleum exploration. Background technique [0002] As an important inorganic material, molecular sieves are widely used as catalysts, adsorbents, ion exchangers and new functional materials. The International Union of Pure and Applied Chemistry (IUPAC) divides molecular sieves into three categories according to the pore size: micropores (<2nm), mesoporous (2-50nm) and macropores (>50nm). Due to the shape selectivity and different pore sizes of molecular sieves, different compounds or even molecules of different configurations of the same compound may behave differently in molecular sieves, so that the separation of monomeric compounds can be achieved without significant isotope fractionation effect. [0003] Microporous molecular sieves have been used for the separation and enrichment of spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01D15/08B01J20/30
CPCB01D15/08B01J20/186
Inventor 方玙黄凌魏彩云胡国艺帅燕华苏劲张文龙
Owner PETROCHINA CO LTD
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