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Measuring method of catalytic cracking slurry solid content

A technology of catalytic cracking oil slurry and measurement method, which is applied in the field of determination of solid content (toluene insoluble matter) of catalytic cracking oil slurry, can solve the problems of reduced stability and precision, small particle size, and low content of solid particles, and achieves The loss of solid phase is reduced, the stability is increased, and the effect of low precision is solved

Inactive Publication Date: 2013-07-10
济宁矿业集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The low content of solid particles in the oil slurry, small particle size, density difference with the liquid phase, and complex dispersion and aggregation rules between solid particles reduce the stability and accuracy of the weight measurement results of the solid content, especially when the oil slurry system When the viscosity is low, the repeatability and reproducibility of the determination method are poor, and it is difficult to meet the stable and accurate requirements of the analysis method.

Method used

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  • Measuring method of catalytic cracking slurry solid content
  • Measuring method of catalytic cracking slurry solid content
  • Measuring method of catalytic cracking slurry solid content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Without any treatment to the oil slurry in the 500ml beaker, take 30g of oil slurry into three 250ml beakers, dilute with 160ml diesel oil, and filter with slow quantitative filter paper to measure the solid content.

[0031] The operating conditions and test results are shown in Table 1, and the test data required to calculate the solid content by the formula are shown in Table 2. From the measurement results, with the deepening of the sampling position, the solid content of the oil slurry increases continuously. According to the 3.576g / L in the beaker 1 and the 3.814g / L in the beaker 3, the oil slurry has obvious natural settlement. And the relative error is large.

Embodiment 2

[0033] The oil slurry in the 500ml beaker was stirred at a constant temperature of 50-60°C for more than 10 minutes, and then the steps were the same as in Example 1, and the solid content of the oil slurry in the three beakers was measured.

[0034] The operating conditions and test results are shown in Table 1, and the test data required to calculate the solid content by the formula are shown in Table 2. From the results of solid content determination, the solid phase distribution of the oil slurry after stirring is relatively uniform, with an average value of 3.940g / L, which is closer to the carbonization burning value, and the average error is small, only 0.56%.

Embodiment 3

[0036] The steps were the same as those in Example 2, the diluent was the same volume of analytically pure toluene, and then the solid content of the oil slurry in different beakers was measured.

[0037] The operating conditions and test results are shown in Table 1, and the test data required to calculate the solid content by the formula are shown in Table 2. From the solid content determination results, it can be seen that the average solid content of the oil slurry is 2.487g / L, which is significantly lower than the carbonization and ignition value of the solid content of the oil slurry, and the maximum relative error is as high as 5.83%, and the stability is poor.

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Abstract

The invention relates to a measuring method of the catalytic cracking slurry solid content. The measuring method comprises the following steps of: preheating, stirring and sampling the slurry, adding certain amount of preheated diluent in the slurry and uniformly stirring; carrying out vacuum filtration on the mixed oil sample, and filtering out undissolved substances on a piece of filter paper; extracting the filtered filter paper by using toluene till an extracting solution is colourless; and carrying out vacuum drying, cooling and weighing on the filter paper after extracting, and figuring out the solid content in the tested slurry according to the mass variation of the filter paper. The measuring method of the catalytic cracking slurry solid content provided by the invention realizes the purpose of stably and accurately measuring the solid content of slurry, and solves the problems of low precision and poor stability in actual measurement of the catalytic cracking slurry solid content, thus providing technical support for purification and utilization of slurry and monitoring on safe and stable operation of a catalytic cracking unit.

Description

technical field [0001] The invention relates to a chemical analysis and testing method, in particular to a method for measuring the solid content (toluene insoluble matter) of catalytic cracking oil slurry. Background technique [0002] Catalytic cracking slurry is an important by-product of secondary processing catalytic cracking, containing a large amount of short side chain condensed aromatic hydrocarbon components (>50%), and is an excellent raw material for the production of high value-added chemical products such as needle coke and carbon fiber. The oil slurry often contains 2-6g / L of solid particles (mainly catalyst powder and coke powder), which seriously affects the utilization depth and breadth of the catalytic cracking oil slurry. Therefore, the oil slurry needs to be purified. The stable and accurate determination of the solid content (toluene insoluble matter) in the oil slurry is the basis for the purification and effective utilization of the oil slurry, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
Inventor 魏忠勋郭爱军赵波郑尊建沐宝泉王宗贤
Owner 济宁矿业集团有限公司
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