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A method of treating fluorine-containing wastewater by using a catalytic cracking balancer

A catalytic cracking and balancing agent technology, applied in chemical instruments and methods, multi-stage water treatment, water/sewage treatment, etc., to achieve the effects of reducing wastewater treatment costs, reducing dosage and expenses, and enriching pore structure

Active Publication Date: 2017-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above various methods are difficult to be effectively applied to the F of molecular sieve production enterprises. - , SO 4 2- and Al 3+ and Si 4+ Fluoride removal treatment of waste water with high content of fluoride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The composition of FCC balancer is: Al 2 o 3 The content is 59% by weight, SiO 2 The content of is 32.6% by weight, other components such as P 2 o 5 、Na 2 O, MgO, K 2 The total content of O etc. is 8.4% by weight, and the specific surface area is 210m 2 / g, the pore volume is 0.35ml / g.

[0063] Weigh 3g of FCC balancer and add it to 200mL of fluorine-containing wastewater with different concentrations, at a speed of 150r min -1 , stirred at room temperature (25°C) for 90 minutes, stood still for 20 minutes, took a sample to measure the fluoride ion in the water, and calculated F - The static adsorption capacity (adsorbed fluorine concentration × water sample volume / balancer mass) and F - The adsorption rate and the treatment effect of FCC balancer on different concentrations of fluorine-containing solutions are shown in Table 1.

[0064] Table 1

[0065] f - Content (mg·L -1 )

[0066] From the results in Table 1 above, it can be seen that when...

Embodiment 2

[0068] This example is used to illustrate the method provided by the present invention for treating fluorine-containing wastewater by using a catalytic cracking balancer.

[0069] Production workshop water: F - Content: 1853.2mg / L; SO 4 2- Content: 21638mg / L; phosphorus content: 109.7mg / L; aluminum content: 2750mg / L; pH: 4.1.

[0070] The FCC balancer is the same as in Example 1.

[0071] Weigh 300mL of the above-mentioned fluorine-containing wastewater, use NaOH aqueous solution to adjust the pH of the wastewater to 7.0, and stir for 15 minutes;

[0072] Then, add the PAM of 2mg / L waste water and the aluminum sulfate coagulant of 150mg / L waste water in the waste water that described pH value is adjusted, mix and carry out coagulation reaction, settle down 90min, get the first supernatant, this upper F in serum - Content: 51.2mg / L;

[0073] Under stirring, add FCC balancing agent to the separated 200mL first supernatant, the dosage is 3g (equivalent to 15g / L wastewater),...

Embodiment 3

[0078] This example is used to illustrate the method provided by the present invention for treating fluorine-containing wastewater by using a catalytic cracking balancer.

[0079] Molecular sieve production of fluorine-containing wastewater: F - Content: 520mg / L; SO 4 2- Content: 5657mg / L; phosphorus content: 35.4mg / L, aluminum content: 1650mg / L; pH: 3.95.

[0080] The FCC balancer is the same as in Example 1.

[0081] Weigh 1L of fluorine-containing wastewater, use NaOH solution to adjust the pH of the wastewater to 7.0, and stir for 15 minutes;

[0082] Then, add PAM of 5 mg / L waste water and 100 mg / L aluminum sulfate coagulant in the waste water of described pH value adjustment, mix uniformly and carry out coagulation aiding reaction, settle for 90min, obtain the first supernatant, this supernatant Middle F - Content 48.3mg / L;

[0083] Under stirring, add FCC balancing agent to the separated 200mL first supernatant, the dosage is 5g (equivalent to 25g / L wastewater), m...

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Abstract

The invention discloses a method for treating fluoride wastewater with a fluid catalytic cracking equilibrium catalyst. The fluoride wastewater contains F<->, SO4<2-> and Al<3+>. The treatment method of the fluoride wastewater comprises the steps that a pH (potential of hydrogen) value of the fluoride wastewater is adjusted to be no less than 5; F<-> is subjected to a neutralization precipitation reaction; the fluoride wastewater subjected to the neutralization precipitation reaction is contacted with a coagulant; solid-liquid separation is performed; first sludge and a first liquid phase are obtained; the obtained first liquid phase is contacted with the fluid catalytic cracking equilibrium catalyst; the solid-liquid separation is performed; and the treated wastewater is obtained. The method can effectively remove fluorine in the fluoride wastewater with higher F<->, SO4<2-> and Al<3+> content.

Description

technical field [0001] The invention relates to a treatment method for fluorine-containing wastewater, in particular to a treatment method for effectively removing fluorine from fluorine-containing wastewater produced in the production process of molecular sieves by using a catalytic cracking balancer. Background technique [0002] Phosphorus-containing skeleton silicon-rich ultra-stable Y molecular sieve (PSRY molecular sieve) is a new type of skeleton silicon-rich molecular sieve prepared by NaY molecular sieve through hydrothermal roasting and complex acid dealumination of silicon. It is prepared with PSRY molecular sieve as the main active component Fluid catalytic cracking (FCC) catalyst has the characteristics of good coke selectivity, high gasoline octane number, strong heavy oil cracking ability, and high diesel yield. After successful industrial trial production, FCC with PSRY molecular sieve as the main active component The catalyst has been used in many heavy oil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/14
CPCC02F1/28C02F1/5236C02F1/56C02F1/583C02F1/66C02F9/00C02F2101/101C02F2101/14C02F2301/08
Inventor 马欣桑军强
Owner CHINA PETROLEUM & CHEM CORP
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