Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing high-purity aluminum sulfate by using waste catalyst to co-produce polysilicon ferric aluminum sulfate

A technology of polysilicon ferric sulfate and waste catalyst, which is applied in the direction of aluminum sulfate, chemical instruments and methods, aluminum silicate, etc., can solve problems such as the dissolution of heavy metal ions and aluminum ions, achieve high dissolution rate, low environmental pollution, and reduce production cost effect

Active Publication Date: 2021-09-17
山东聚杰环保科技有限公司
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also uses the acid hydrolysis method to directly acidify the metal components in the spent catalyst, which easily leads to the risk of dissolution of heavy metal ions and aluminum ions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing high-purity aluminum sulfate by using waste catalyst to co-produce polysilicon ferric aluminum sulfate
  • Method for preparing high-purity aluminum sulfate by using waste catalyst to co-produce polysilicon ferric aluminum sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Put 480ml of 15% sodium hydroxide solution and 100g of FCC waste catalyst in a closed autoclave, set the stirring speed at 850rpm, heat up with electric heating, maintain the reaction temperature at 130°C, the reaction pressure at 0.3MPa, and the reaction time for 4h. The heat is transferred to a titanium rod filter, and forced to press to obtain an aluminosilicate solution.

[0066] (2) Transfer the aluminosilicate solution to a three-necked flask, install a condenser, connect a water circulation vacuum pump, and concentrate the aluminosilicate in a vacuum; the concentration temperature is 75°C, the vacuum degree is -0.08MPa, and the concentration end point is an alkali concentration of 220g / L (in Na 2 O meter).

[0067] (3) At an initial temperature of 82°C, 63.9g of aluminum hydroxide seeds and 2.2g of crystallization aid sodium stearate were thrown into the concentrated aluminosilicate solution to promote the decomposition of sodium aluminate; the stirring spee...

Embodiment 2

[0073] (1) Put 760ml of 10% sodium hydroxide solution and 100g of FCC waste catalyst in a closed autoclave, set the stirring speed at 600rpm, heat up with electric heating, maintain the reaction temperature at 135°C, the reaction pressure at 0.35MPa, and the reaction time for 5h. The heat is transferred to a titanium rod filter, and forced to press to obtain an aluminosilicate solution.

[0074] (2) Transfer the aluminosilicate solution to a three-necked flask, install a condenser, connect a water circulation vacuum pump, and concentrate the aluminosilicate in a vacuum; the concentration temperature is 68°C, the vacuum degree is -0.08MPa, and the concentration end point is an alkali concentration of 180g / L (in Na 2 O meter).

[0075] (3) At an initial temperature of 90°C, throw 94.5g of aluminum hydroxide seeds and 1.89g of crystallization aid sodium stearate into the concentrated aluminosilicate solution to promote the decomposition of sodium aluminate; stirring speed 100rpm...

Embodiment 3

[0081] (1) Put 345ml 20% sodium hydroxide solution and 100g FCC waste catalyst in a closed autoclave, set the stirring speed at 1000rpm, heat up by electric heating, maintain the reaction temperature at 95°C, the reaction pressure at 0.2MPa, and the reaction time for 3h. The heat is transferred to a titanium rod filter, and forced to press to obtain an aluminosilicate solution.

[0082] (2) Transfer the aluminosilicate solution to a three-necked flask, install a condenser, connect a water circulation vacuum pump, and concentrate the aluminosilicate in a vacuum; the concentration temperature is 80°C, the vacuum degree is -0.08MPa, and the concentration end point is an alkali concentration of 240g / L (in Na 2 O meter).

[0083] (3) At an initial temperature of 85°C, throw 31.3g of aluminum hydroxide seeds and 1.56g of crystallization aid sodium stearate into the concentrated aluminosilicate solution to promote the decomposition of sodium aluminate; the stirring speed is 200rpm, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of comprehensive utilization of solid hazardous waste and flocculant production, and in particular relates to a method for preparing high-purity aluminum sulfate by using waste catalysts to co-produce polysilicon ferric aluminum sulfate. Sodium hydroxide is reacted with spent FCC catalyst at elevated temperature and pressure, and aluminosilicate is obtained by filtration; the aluminosilicate is concentrated in vacuum; aluminum hydroxide seeds and crystallization aids are added to the aluminosilicate, the Filtrate to obtain solid aluminum hydroxide and dealuminated mother liquor; obtain solid aluminum hydroxide and sulfuric acid to prepare liquid aluminum sulfate; neutralize liquid aluminum sulfate and concentrate in vacuo, cool and crystallize to obtain aluminum sulfate; drop ferric sulfate solution and sulfuric acid into dealuminated mother liquor , adjust the pH of the reaction system to 0.8-1.7, and ripen to obtain liquid polysilicon ferric aluminum sulfate. In addition to further reducing the production cost, the co-production of polysilicon ferric aluminum sulfate in the present invention also reduces the amount of waste residue and waste water, which is a low-cost, Al 2 o 3 A production technology with high dissolution rate, high purity of the obtained product and little environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of solid hazardous waste and flocculant production, and in particular relates to a method for preparing high-purity aluminum sulfate by using waste catalysts to co-produce polysilicon ferric aluminum sulfate. Background technique [0002] Aluminum sulfate is a kind of inorganic compound with good water solubility, and its properties are white orthorhombic crystalline powder. Chemical formula: Al 2 (SO 4 ) 3 , Aluminum sulfate is used as a precipitant for rosin glue and wax emulsion in the paper industry, as a flocculant in water treatment, as an internal retention agent for foam fire extinguishers, as a raw material for making alum and aluminum white, as a decolorizing and deodorizing agent for petroleum , Raw materials of certain medicines, etc. In terms of its production scale, it ranks third in my country after Glauber's salt and sodium silicate. The first major use of al...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/74C01F7/06C01F7/14C01B33/26
CPCC01B33/26C01F7/0693C01F7/14C01F7/743C01P2006/80
Inventor 王文泽梁之举王居亮
Owner 山东聚杰环保科技有限公司