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

Process for preparing calcium acetate snow thawing agent

A technology of snow melting agent and calcium acetate, which is applied in the fields of carboxylate preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high cost, acetic acid pollution, long process flow, etc., and reduce the manufacturing cost. , the effect of cost reduction

Inactive Publication Date: 2006-04-12
CHANGCHUN JIACHEN ENVIRONMENT PROTECTING EQUIP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a preparation method of calcium acetate deicing agent to solve the disadvantages of high cost and long process flow in the current preparation method of calcium acetate, and solve the problem of acetic acid pollution in furfural wastewater

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Include the following steps:

[0011] 1. Wastewater neutralization: The tower bottom wastewater generated in furfural production passes through a fluidized bed made of limestone, and the contact time is 1 hour to neutralize the wastewater to a pH value of 7;

[0012] 2. Concentration of raffinate: after neutralizing the waste water with a pH value of 7, it enters the double-effect evaporation system to evaporate the water in the waste water, and the raffinate is concentrated. When the solid content of the concentrated liquid is 40%, it is discharged;

[0013] 3. Adsorption filtration: move the raffinate discharged in step 2 into the reaction kettle, add 10% powdered activated carbon by weight, heat and boil for 1 hour, absorb, centrifuge with a centrifuge, and filter at a speed of 1800 / min;

[0014] 4. Dry the filtrate: dry the filtered liquid in step 3 to separate out white calcium acetate.

Embodiment 2

[0016] Include the following steps:

[0017] 1. Wastewater neutralization: The tower bottom wastewater generated in furfural production passes through a fluidized bed made of limestone, and the contact time is 1.3 hours to neutralize the wastewater to a pH value of 7.5;

[0018] 2. Concentration of the raffinate: the neutralized waste water with a pH value of 7.5 enters the double-effect evaporation system to evaporate the water in the waste water, and the raffinate is concentrated. When the solid content of the concentrated liquid is 40%, it is discharged;

[0019] 3. Adsorption filtration: move the raffinate discharged in step 2 into the reaction kettle, add 12% powdered activated carbon by weight, heat and boil for 1 hour, absorb, centrifuge with a centrifuge, and filter at a speed of 1860 / min;

[0020] 4. Dry the filtrate: dry the filtered liquid in step 3 to separate out white calcium acetate.

Embodiment 3

[0022] Include the following steps:

[0023] 1. Wastewater neutralization: The tower bottom wastewater generated in furfural production passes through a fluidized bed made of limestone, and the contact time is 1.5 hours to neutralize the wastewater to a pH value of 8;

[0024] 2. Concentration of the raffinate: the neutralized waste water with a pH value of 8 enters the double-effect evaporation system to evaporate the water in the waste water, and the raffinate is concentrated. When the solid content of the concentrated liquid is 40%, it is discharged;

[0025] 3. Adsorption filtration: move the raffinate discharged in step 2 into the reaction kettle, add 15% powdered activated carbon by weight, heat and boil for 1 hour, absorb, centrifuge with a centrifuge, and filter at a speed of 1900 / min;

[0026] 4. Dry the filtrate: dry the filtered liquid in step 3 to separate out white calcium acetate.

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 calcium acetate snow thawing agent is prepared through the following steps: neutralizing waste water from bottom of furfural producing tower in one fluidized bed comprising limestone to pH 7-8; concentrating the residual liquid in a double-effect evaporating system to evaporate water; adsorbing the residual liquid inside a reactor with powdered active carbon, centrifuging and filtering; and stoving to separate white calcium acetate. The present invention has the advantages of utilizing the waste water resource from furfural production, reducing pollution and low production cost.

Description

technical field [0001] The invention belongs to a preparation method of deicing agent, in particular to a preparation method of calcium acetate. Background technique [0002] In winter in the north, a large amount of deicing agents are needed to melt the snow on the roads. At present, many deicing agents have the disadvantages of polluting the environment, poor snow melting effect, and slow snow melting speed. Among various deicing agents, calcium acetate is the better one, which has low environmental pollution and good deicing effect. Calcium acetate is usually prepared by reacting acetic acid with limestone or reacting with calcium oxide and calcium hydroxide. The disadvantages of this method are high cost and long process flow. At the same time, it also increases the expenditure on snowmelt in winter cities. The production of furfural by deep processing of corn cobs began in the 1930s and was introduced in my country in the 1950s. The overall development began in the la...

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): C09K3/18C02F1/00C02F1/04C02F1/28C02F1/66C02F9/00C07C51/41
CPCC09K3/185C02F2101/366C02F1/385C02F1/66C02F1/048C02F2103/36C02F1/001C07C51/41C02F1/283C02F9/00C02F1/38
Inventor 于广军朱果逸张书义寇艳秋
Owner CHANGCHUN JIACHEN ENVIRONMENT PROTECTING EQUIP