CN113582564A - Method for processing suspension obtained in production of epoxy chloropropane by glycerol method - Google Patents
Method for processing suspension obtained in production of epoxy chloropropane by glycerol method Download PDFInfo
- Publication number
- CN113582564A CN113582564A CN202111040613.4A CN202111040613A CN113582564A CN 113582564 A CN113582564 A CN 113582564A CN 202111040613 A CN202111040613 A CN 202111040613A CN 113582564 A CN113582564 A CN 113582564A
- Authority
- CN
- China
- Prior art keywords
- filter
- filter cake
- weight
- cake
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a treatment method of a suspension obtained in the production of epichlorohydrin by a glycerol method. By adopting a conventional cement production process, the granular lime mud obtained by the treatment method can be used for producing cement meeting the national existing portland cement standard, and the granular lime mud is recycled, so that waste is changed into valuable, and the environmental protection is facilitated; the treatment method has simple process, simple and convenient operation and easy realization of industrialization.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of comprehensive utilization of industrial solid waste resources, and particularly relates to a method for treating suspension obtained during production of epichlorohydrin by a glycerol method.
[ background of the invention ]
The industrial solid waste mainly refers to mining waste rock, solid waste slag after combustion, unqualified raw material tailings discharged in the industrial production process and solid waste generated in the smelting or chemical production process.
With the development of industry in China, the generated solid wastes show a trend of rising year by year, most of the solid wastes can only be simply stacked or buried due to lack of reasonable utilization of industrial solid waste resources, and the stacking of the solid wastes not only causes pollution to the natural ecological environment, but also occupies a large amount of land resources.
Two ways are generally available for the resource utilization of industrial solid wastes, and firstly, the use amount of industrial raw materials is reduced by upgrading a novel production technology, so that the production of the industrial solid wastes is reduced; and secondly, a recycling technology with higher economic benefit and utilization rate is developed.
In order to solve the problem of treatment of the existing solid waste, the inventor finally completes the invention through a large number of experiments and researches.
[ summary of the invention ]
[ problem to be solved ]
The invention aims to provide a method for treating a suspension obtained in the production of epichlorohydrin by a glycerol method.
[ solution ]
The invention is realized by the following technical scheme.
The invention relates to a method for processing suspension obtained in the production of epoxy chloropropane by a glycerol method.
The processing method comprises the following processing steps:
A. filter pressing treatment
Conveying the turbid liquid obtained in the production of epoxy chloropropane by a glycerol method into a filter press at the pressure of 5-6 kg/m2Performing first filter pressing under the condition of (1) to obtain clear liquid and filter cakes, and evaporating and drying the clear liquid to obtain calcium chlorideThe filter cake is repeatedly washed with tap water on site under the condition of filter pressing until the content of chloride ions in the washing liquid is 0.5-1.0% by weight, and then the washing is finished under the pressure of 20-25 kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake;
B. crushing and drying
And C, crushing the secondary filter pressing filter cake obtained in the step B by using a crusher, conveying the crushed material into a dryer, and drying for 60-120 min at the temperature of 150-180 ℃ to obtain granular lime slag which is used for producing portland cement by using a portland cement production process.
According to a preferred embodiment of the present invention, in step A, the suspension comprises 0.5-2.0% by weight of water-insoluble substances and 12-20% by weight of calcium chloride solution, wherein the water-insoluble substances comprise calcium carbonate, trace silicates and unreacted Ca (OH) which are not dissolved in the suspension2Solids and small amounts of oxides of iron, magnesium, and aluminum.
According to another preferred embodiment of the invention, in the step A, the water content of the filter cake obtained by the first pressure filtration is 70-80% of the total weight of the filter cake.
According to another preferred embodiment of the invention, the ratio of the first filter cake pressed in kilograms to the tap water in liters is 1: 3 to 6.
According to another preferred embodiment of the present invention, in step a, the water content of the secondary filter press cake is 32 to 38% by weight based on the total weight of the filter cake.
According to another preferred embodiment of the present invention, in step a, the filter press is a plate and frame filter press, a membrane press filter press or a chamber filter press.
According to another preferred embodiment of the present invention, in the step B, the secondary filter press cake is crushed to a particle size of 30 to 40mm using a crusher.
According to another preferred embodiment of the present invention, in step B, the dryer is a disc dryer or a hollow blade dryer.
According to another preferred embodiment of the invention, in the step B, the particle size of the granular lime mud is 1-5 mm.
According to another preferred embodiment of the invention, in step B, the particulate lime mud contains 0.2 to 0.5% by weight of water based on the weight of the lime mud, as well as calcium carbonate, silicates, calcium chloride and other small amounts of inorganic substances.
The present invention will be described in more detail below.
The invention relates to a method for processing suspension obtained in the production of epoxy chloropropane by a glycerol method.
The processing method comprises the following processing steps:
A. filter pressing treatment
Conveying the turbid liquid obtained in the production of epoxy chloropropane by a glycerol method into a filter press at the pressure of 5-6 kg/m2The first filter pressing is carried out under the condition of (1) to obtain clear liquid and filter cakes. Evaporating and drying the clear liquid to obtain calcium chloride, repeatedly washing the filter cake with tap water on site under the condition of filter pressing of the filter cake until the content of chloride ions in the washing liquid is 0.5-1.0% by weight, and then finishing washing under the pressure of 20-25 kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake;
a suspension is produced in the cyclization step of epichlorohydrin production by the glycerol process. The cyclization step is as follows: the mixed solution of dichloropropanol is dehydrochlorinated and cyclized in a reactive distillation tower under the alkaline environment to generate epichlorohydrin, and then the epichlorohydrin is stripped by steam. The alkaline environment is formed by Ca (OH)2Emulsion or NaOH solution. Generation of CaCl from alkali participating in dehydrochlorination reaction2Or NaCl. Ca (OH)2The emulsion contains calcium carbonate brought in by lime, traces of silicates and unreacted Ca (OH) which is not dissolved in the suspension2Solids and small amounts of oxides of iron, magnesium, and aluminum also enter the suspension.
According to the invention, in the step A, the suspension consists of 0.5-2.0% of water-insoluble substances and 12-20% of calcium chloride solution by weight of the suspension. The water-insoluble substance isBrought in by the lime raw material, mainly calcium carbonate, traces of silicates and unreacted and undissolved Ca (OH)2Solids and small amounts of oxides of iron, magnesium, and aluminum.
According to the invention, the suspension is subjected to a pressure of 5-6 kg/m in a filter press2The first filter pressing is carried out under the condition of (1), and the water content of the obtained filter cake is 70-80% of the total weight of the filter cake. If the water content of the obtained filter cake is higher than 80%, the material is not easy to form, and the solid is easy to fall off during washing; if the water content of the obtained filter cake is lower than 70%, the filter cake is too dense, water is not easy to enter a deep layer during washing, and insufficient washing is caused, so that the water content of the filter cake obtained by the first filter pressing is controlled to be 70-80% by weight, preferably 72-78%.
The filter cake obtained in the step A is washed by tap water, and the main purpose is to elute and remove calcium chloride contained in the filter cake so as to control the content of calcium chloride in the lime mud, so that on one hand, the content of chloride ions in cement can be controlled, and on the other hand, the influence on the subsequent grinding effect caused by the moisture absorption and the moisture regain of the dried particle lime mud in the step B can be avoided.
According to the invention, when the filter cake obtained in step a is washed with tap water, the ratio of the first filter cake pressed in kilograms to the tap water in liters is 1: 3 to 6. If the ratio of the filter cake obtained by the first filter pressing to tap water is more than 1: 3, the water consumption is too large, the cost is high, and the method is not economical; if the ratio of the filter cake obtained by the first filter pressing to tap water is less than 1: 6, the residual amount of calcium chloride is large, so that the content of chloride ions in the product exceeds the standard; thus, the ratio of the first press cake to tap water was 1: 3 to 6 are suitable, preferably 1: 4-5;
according to the invention, the water content of the secondary filter pressing filter cake is 32-38% of the total weight of the filter cake. If the water content of the secondary filter pressing filter cake is lower than 32%, the difficulty of the existing filter pressing technology is high or the generated investment cost is high; if the water content of the filter cake of the secondary filter pressing is higher than 38 percent, the drying energy consumption is increased, which is not economical; therefore, the water content of the secondary filter pressing filter cake is reasonable to be 32-38%, and preferably 34-36%;
the filter press used in the present invention is a plate and frame filter press, a membrane press filter or a chamber filter press, which are commercially available at present, and examples thereof include a plate and frame filter press sold under the trade name quick-open filter press by Shanghai Daizhang filtration facility Co., Ltd, a membrane press filter sold under the trade name membrane filter press by Jianhua group Filter Co., Ltd, Zhejiang, and a chamber filter press sold under the trade name 800 chamber filter press by Hangzhou Zhengji filtration facility Co., Ltd.
B. Crushing and drying
And C, crushing the secondary filter pressing filter cake obtained in the step B by using a crusher, conveying the crushed material into a dryer, and drying for 60-120 min at the temperature of 150-180 ℃ to obtain granular lime slag which is used for producing portland cement by using a portland cement production process.
According to the invention, the secondary filter pressing filter cake is crushed to the granularity of 30-40 mm by using a crusher. If the granularity of the crushed secondary filter-pressing filter cake is less than 30mm, the influence on the drying effect is small, the requirement on crushing equipment is high, and the investment cost is increased; if the granularity of the crushed secondary filter-pressing filter cake is more than 40mm, the material is not easy to convey and disperse in a dryer; accordingly, it is appropriate that the particle size of the crushed secondary filter cake is 30 to 40mm, preferably 32 to 37 mm.
The crusher used in the present invention is a pair roller crusher or a double tooth crusher, which are both products currently marketed, such as a crusher sold under the trade name of a pair roller crusher by sidereal heavy equipment limited of zheng zhou city or a crusher sold under the trade name of a double tooth roller crusher by yanto hua heavy industry ltd.
According to the invention, the crushed material is dried in a dryer at a temperature of 150-180 ℃ for 60-120 min to obtain the granular lime mud. When the drying time is 60-120 min, if the drying temperature of the crushed material is lower than 150 ℃, the moisture in the material is not easy to evaporate and remove; if the drying temperature of the crushed materials is higher than 180 ℃, the drying effect is not obviously changed, but the operation cost is obviously increased; therefore, the drying temperature of the crushed materials is preferably 150-180 ℃, and preferably 158-172 ℃;
when the drying temperature is 150-180 ℃, if the drying time of the crushed materials is shorter than 60min, the moisture content of the materials is not obviously reduced; if the drying time of the crushed material is longer than 120min, the moisture content of the material is not obviously reduced, but the energy consumption is obviously increased; therefore, the drying time of the crushed material is suitably 60-120 min, preferably 76-102 min;
the dryer used in the present invention is a disc dryer or a hollow blade dryer, which are currently commercially available products, such as a product sold under the trade name of a disc closed-cycle dryer by Jiangsu Kouchi drying engineering Co., Ltd, and a product sold under the trade name of a KJG series hollow blade dryer by Chang Tai drying technology Co., Ltd.
The particle size of the granular lime mud is 1-5 mm by caliper measurement. If the particle size of the granular lime mud is less than 1mm, dust raising is large in the drying process, so that the cleaning period of dust removing equipment is shortened, and the stable operation of the device is not facilitated; if the particle size of the granular lime mud is larger than 5mm, the particle size is too large, and the wrapped water is not easy to dry, so that the water content of the dried material is too high, and the production of portland cement is unqualified; therefore, it is reasonable that the particle size of the particulate lime mud is 1 to 5mm, preferably 2 to 4 mm.
According to the detection of a drying weight loss measurement method, the particle lime mud contains 0.2-0.5% of water by weight of the lime mud, and the balance of calcium carbonate, silicate, calcium chloride and other small inorganic substances.
The cement which meets the national existing portland cement standard can be produced by mixing the granular lime mud with various materials for producing cement clinker, gypsum, slag and the like by adopting a conventional cement production process and then grinding by using a grinding mill.
[ advantageous effects ]
The invention has the beneficial effects that: by adopting the method, the water insoluble substances in the suspension obtained in the production of the epichlorohydrin by the glycerol method are treated into the granular lime mud, and the lime mud can be used for producing cement, so that the lime mud is recycled, and the waste is changed into valuable, thereby being beneficial to environmental protection; the invention has simple process flow, simple and convenient operation and easy realization of industrialization, and the particle lime mud processed by the invention can be used for producing cement which meets the national existing portland cement standard.
[ detailed description ] embodiments
The invention will be better understood from the following examples.
Example 1: treatment of suspension obtained during production of epichlorohydrin by glycerol method
The implementation steps of this example are as follows:
A. first filter pressing
This example uses a suspension obtained in the production of epichlorohydrin by the glycerol process, consisting of 2.0% by weight of water-insoluble substance and 18% by weight of calcium chloride solution, said suspension being fed to a plate and frame filter press sold under the name quick-open filter press by Shanghai Daizong Filter Equipment Ltd, at a pressure of 5kg/m2The first press filtration is carried out under the conditions of (1) to obtain a clear solution and a filter cake with the water content accounting for 80 percent of the total weight. And (3) evaporating and drying the clear solution to produce calcium chloride, wherein the filter cake is subjected to first filter pressing according to kilogram to liter to tap water ratio of 1: 3 repeated washing in situ with tap water until the chloride ion content of the washing liquor is 0.8% by weight, followed by washing at a pressure of 25kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake, wherein the water content of the secondary filter pressing filter cake is 38 percent of the total weight of the filter cake;
B. crushing and drying
And C, crushing the secondary filter pressing filter cake obtained in the step B to the particle size of 30-40 mm by using a crusher sold by Zhengzhou province heavy equipment Limited company under the trade name of a double-roll crusher, conveying the crushed material to a disc type dryer sold by Jiangsu Kouchui drying engineering Limited company under the trade name of a disc type closed cycle dryer, and drying for 120min at the temperature of 150 ℃ to obtain granular lime mud with the particle size of 1-5 mm, wherein the granular lime mud contains 0.2% of water, calcium carbonate, silicate, calcium chloride and other small amount of inorganic substances based on the weight of the lime mud. The tests were carried out on Portland cement with a strength rating of 42.5 according to the standard GB 175-2007 Universal Portland Cement, and the test results are shown in Table 1. At the same time, tests were also carried out using 42.5 portland cement with no incorporation of the present lime-clinker cement, and the results of these tests are shown in table 1. The test result shows that the cement which meets the national existing portland cement standard can be produced from the granular lime mud obtained by the embodiment by adopting the conventional cement production process.
Example 2: treatment of suspension obtained during production of epichlorohydrin by glycerol method
The implementation steps of this example are as follows:
A. first filter pressing
This example used a suspension obtained in the production of epichlorohydrin by the glycerol process, which consisted of 0.5% by weight of water-insoluble matter and 12% by weight of calcium chloride solution, and which was fed to a membrane press filter sold under the trade name membrane press by Jianghua group filters, Inc., Zhejiang, at a pressure of 6kg/m2The first press filtration is carried out under the conditions of (1) to obtain a clear solution and a filter cake with the water content accounting for 70 percent of the total weight. And (3) evaporating and drying the clear solution to produce calcium chloride, wherein the filter cake is subjected to first filter pressing according to kilogram to liter to tap water ratio of 1: 4 repeated washing in situ with tap water until the chloride ion content of the washing liquor is 0.5% by weight, followed by washing at a pressure of 20kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake, wherein the water content of the secondary filter pressing filter cake is 32 percent of the total weight of the filter cake;
B. crushing and drying
And C, crushing the secondary filter pressing filter cake obtained in the step B to the granularity of 30-40 mm by using a crusher sold by Shandonghua machine, heavy industry Co., Ltd under the trade name of a double-geared roller crusher, conveying the crushed material to a hollow blade dryer sold by Changzhou Longtai drying technology Co., Ltd under the trade name of a KJG series hollow blade dryer, and drying for 100min at the temperature of 160 ℃ to obtain granular lime mud with the particle size of 1-5 mm, wherein the granular lime mud contains 0.4% of water, calcium carbonate, silicate, calcium chloride and other small inorganic substances by weight of the lime mud. The tests were carried out on Portland cement with a strength rating of 42.5 according to the standard GB 175-2007 Universal Portland Cement, and the test results are shown in Table 1. The test result shows that the cement which meets the national existing portland cement standard can be produced from the granular lime mud obtained by the embodiment by adopting the conventional cement production process.
Example 3: treatment of suspension obtained during production of epichlorohydrin by glycerol method
The implementation steps of this example are as follows:
A. first filter pressing
This example uses a suspension obtained in the production of epichlorohydrin by the glycerol process, consisting of 1.0% by weight of water-insoluble substance and 15% by weight of calcium chloride solution, said suspension being fed to a chamber filter press sold under the name 800 chamber filter press by Hangzhou Zhengji Filter installations Ltd, at a pressure of 5kg/m2The first pressure filtration was carried out under the conditions described above, obtaining a clear solution and a filter cake with a moisture content of 74% by total weight. And (3) evaporating and drying the clear solution to produce calcium chloride, wherein the filter cake is subjected to first filter pressing according to kilogram to liter to tap water ratio of 1: 5 repeated washing in situ with tap water until the chloride ion content of the washing liquor is 0.6% by weight, followed by a pressure of 22kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake, wherein the water content of the secondary filter pressing filter cake is 35 percent of the total weight of the filter cake;
B. crushing and drying
And C, crushing the secondary filter pressing filter cake obtained in the step B to the granularity of 30-40 mm by using a crusher sold by Zhenzhou Daizhong heavy equipment Limited company under the trade name of a double-roller crusher, conveying the crushed material to a disc type dryer sold by Jiangsu Yicheng drying engineering Limited company under the trade name of a disc type closed-loop circulation dryer, and drying for 80min at the temperature of 170 ℃ to obtain granular lime mud with the grain diameter of 1-5 mm, wherein the granular lime mud contains 0.3% of water, calcium carbonate, silicate, calcium chloride and other small amount of inorganic substances based on the weight of the lime mud. The tests were carried out on Portland cement with a strength rating of 42.5 according to the standard GB 175-2007 Universal Portland Cement, and the test results are shown in Table 1. The test result shows that the cement which meets the national existing portland cement standard can be produced from the granular lime mud obtained by the embodiment by adopting the conventional cement production process.
Example 4: treatment of suspension obtained during production of epichlorohydrin by glycerol method
The implementation steps of this example are as follows:
A. first filter pressing
This example uses a suspension obtained in the production of epichlorohydrin by the glycerol process, consisting of 1.5% by weight of water-insoluble substance and 20% by weight of calcium chloride solution, said suspension being fed to a plate and frame filter press sold under the name quick-open filter press by Shanghai Daizong Filter installation Ltd, at a pressure of 6kg/m2The first pressure filtration was carried out under the conditions of (1) to obtain a clear solution and a filter cake having a moisture content of 77% by total weight. And (3) evaporating and drying the clear solution to produce calcium chloride, wherein the filter cake is subjected to first filter pressing according to kilogram to liter to tap water ratio of 1: 6 repeated washing in situ with tap water until the chloride ion content of the washing liquor is 1.0% by weight, followed by washing under a pressure of 24kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake, wherein the water content of the secondary filter pressing filter cake is 36 percent of the total weight of the filter cake;
B. crushing and drying
And B, crushing the secondary filter pressing filter cake obtained in the step B to the granularity of 30-40 mm by using a crusher sold by Shandonghua machine, heavy industry Co., Ltd under the trade name of a double-geared roller crusher, conveying the crushed material to a disc type dryer sold by Jiangsu Yicheng drying engineering Co., Ltd under the trade name of a disc type closed-loop circulation dryer, and drying for 60min at the temperature of 180 ℃ to obtain granular lime mud with the grain diameter of 1-5 mm, wherein the granular lime mud contains 0.5% of water, calcium carbonate, silicate, calcium chloride and other small amount of inorganic matters based on the weight of the lime mud. The tests were carried out on Portland cement with a strength rating of 42.5 according to the standard GB 175-2007 Universal Portland Cement, and the test results are shown in Table 1.
Table 1: EXAMPLES 1-4 Properties of Portland Cement produced from particulate lime sludge
The test results in table 1 show that the particulate lime mud processed by the method of the present invention can produce cement meeting the national current portland cement standards using conventional cement production processes.
Claims (10)
1. A treatment method of a suspension obtained in the production of epichlorohydrin by a glycerol method is characterized by comprising the following treatment steps:
A. filter pressing treatment
Conveying the turbid liquid obtained in the production of epoxy chloropropane by a glycerol method into a filter press at the pressure of 5-6 kg/m2Performing first filter pressing under the condition of (1) to obtain clear liquid and filter cakes; evaporating and drying the clear liquid to obtain calcium chloride, repeatedly washing the filter cake with tap water on site under the condition of filter pressing of the filter cake until the content of chloride ions in the washing liquid is 0.5-1.0% by weight, and then finishing washing under the pressure of 20-25 kg/m2Carrying out secondary filter pressing under the condition of (1) to obtain a secondary filter pressing filter cake;
B. crushing and drying
And C, crushing the secondary filter pressing filter cake obtained in the step B by using a crusher, conveying the crushed material into a dryer, and drying for 60-120 min at the temperature of 150-180 ℃ to obtain granular lime slag which is used for producing portland cement by using a portland cement production process.
2. The method according to claim 1, wherein in step A, the suspension comprises 0.5-2.0% by weight of water-insoluble substances and 12-20% by weight of calcium chloride solution, wherein the water-insoluble substances comprise calcium carbonate, trace silicate and Ca (OH) which are not reacted and dissolved in the suspension2Solids and small amounts of oxides of iron, magnesium, and aluminum.
3. The treatment method according to claim 1, wherein in the step A, the water content of the filter cake obtained by the first pressure filtration is 70-80% of the total weight of the filter cake.
4. The process according to claim 1, wherein the ratio of the first filter-press cake in kilograms to the tap water in liters is 1: 3 to 6.
5. The process of claim 1, wherein in step a, the water content of the secondary filter press cake is 32 to 38% by weight based on the total weight of the filter cake.
6. The process of claim 1, wherein in step A, the filter press is a plate and frame filter press, a membrane press filter press or a chamber filter press.
7. The treatment method according to claim 1, wherein in the step B, the secondary filter press cake is crushed to a particle size of 30 to 40mm by using a crusher.
8. The process of claim 1, wherein in step B, the dryer is a disc dryer or a hollow blade dryer.
9. The treatment method according to claim 1, wherein in step B, the particle size of the particulate lime mud is 1 to 5 mm.
10. A treatment process according to claim 1, characterized in that in step B, the particulate lime mud contains 0.2-0.5% by weight of lime mud of water, as well as calcium carbonate, silicates, calcium chloride and other minor inorganics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111040613.4A CN113582564A (en) | 2021-09-06 | 2021-09-06 | Method for processing suspension obtained in production of epoxy chloropropane by glycerol method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111040613.4A CN113582564A (en) | 2021-09-06 | 2021-09-06 | Method for processing suspension obtained in production of epoxy chloropropane by glycerol method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113582564A true CN113582564A (en) | 2021-11-02 |
Family
ID=78241404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111040613.4A Pending CN113582564A (en) | 2021-09-06 | 2021-09-06 | Method for processing suspension obtained in production of epoxy chloropropane by glycerol method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113582564A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009263338A (en) * | 2008-03-12 | 2009-11-12 | Daiso Co Ltd | Novel manufacturing method of epichlorohydrin |
| CN102617514A (en) * | 2012-03-09 | 2012-08-01 | 常州大学 | Clean process for using glycerin to synthesize epichlorohydrin |
| CN107032382A (en) * | 2017-04-11 | 2017-08-11 | 宁波环洋新材料股份有限公司 | A kind of nano-calcium carbonate and preparation method thereof |
| CN111718688A (en) * | 2020-07-30 | 2020-09-29 | 宁波环洋新材料股份有限公司 | Environment-friendly snow-melting agent and production method thereof |
-
2021
- 2021-09-06 CN CN202111040613.4A patent/CN113582564A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009263338A (en) * | 2008-03-12 | 2009-11-12 | Daiso Co Ltd | Novel manufacturing method of epichlorohydrin |
| CN102617514A (en) * | 2012-03-09 | 2012-08-01 | 常州大学 | Clean process for using glycerin to synthesize epichlorohydrin |
| CN107032382A (en) * | 2017-04-11 | 2017-08-11 | 宁波环洋新材料股份有限公司 | A kind of nano-calcium carbonate and preparation method thereof |
| CN111718688A (en) * | 2020-07-30 | 2020-09-29 | 宁波环洋新材料股份有限公司 | Environment-friendly snow-melting agent and production method thereof |
Non-Patent Citations (2)
| Title |
|---|
| BELL, BM等: ""Glycerin as a Renewable Feedstock forEpichlorohydrin Production. The GTE Process"", 《CLEAN-SOIL AIR WATER》 * |
| 马海龙等: "环氧氯丙烷废水处理新工艺的研究", 《山东化工》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101391794B (en) | Novel method for preparing light calcium carbonate by recovering solid white slime through alkaline pulping | |
| CN109775743B (en) | Method for extracting pure calcium fluoride from calcium fluoride sludge | |
| CN109650429B (en) | Carbide slag recycling treatment process | |
| CN101367589A (en) | Reutilization process for painting and coating pigment pf paper mill | |
| CN106566925A (en) | Method for achieving acid mixing, curing and leaching of vanadium through stone coal vanadium ore | |
| CN102827313A (en) | Method for coproducing acid-phase-process synthesized chlorinated polyethylene and glycerol-process synthesized epoxy chloropropane | |
| CN113816633A (en) | Method for preparing high-quality building gypsum by using phosphogypsum | |
| CN111018376A (en) | Household garbage incineration fly ash washing dechlorinating device and tail water discharging method | |
| CN111994937B (en) | Method for recycling calcium fluoride from fluorine-containing sludge | |
| CN109133028A (en) | A method of electrolytic cell waste cathode carbon block recycling is disposed with alkaline process | |
| CN108295808A (en) | A kind for the treatment of agent for papermaking wastewater | |
| CN102627435B (en) | Paper pulp waste residue steam-pressing brick and preparation method thereof | |
| CN113582564A (en) | Method for processing suspension obtained in production of epoxy chloropropane by glycerol method | |
| CN102816248B (en) | Dry type cassava starch extraction process | |
| CN106747482A (en) | A kind of method that utilization percolate prepares thinning type ceramic additive | |
| CN207347180U (en) | A kind of system comprehensively utilized to Aluminum sludge | |
| CN217555963U (en) | Comprehensive treatment device for ammonia-soda process alkaline residue waste liquid | |
| CN102795701A (en) | Method for treating acidic waste water from titanium dioxide preparation by sulfuric acid method | |
| CN103964660B (en) | The acid wastewater treatment of acid-base neutralisation precipitator method process iron content produces the recovery process of mud | |
| CN102653403A (en) | Process method for preparing calcium carbide by recycling calcium carbide slag | |
| CN108675380A (en) | A kind of preparation method of dyeing waste water cleanser | |
| CN102241409A (en) | Preparation method of cesium carbonate | |
| CN111689509B (en) | Device and method for preparing micro-powder calcium carbonate by using carbide slag | |
| CN1410352A (en) | Comprehensive utilization method of converting chromium slag totally into light magnesium carbonate and fine iron breeze | |
| CN204685645U (en) | The treating apparatus of waste cathode carbon block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |