CN109289298A - Utilize the method for the waste liquid production hydroxyacetic acid of CMC - Google Patents
Utilize the method for the waste liquid production hydroxyacetic acid of CMC Download PDFInfo
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- CN109289298A CN109289298A CN201810940828.3A CN201810940828A CN109289298A CN 109289298 A CN109289298 A CN 109289298A CN 201810940828 A CN201810940828 A CN 201810940828A CN 109289298 A CN109289298 A CN 109289298A
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- acid
- sodium
- rotating cylinder
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- waste liquid
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/02—Preparation of carboxylic acids or their salts, halides or anhydrides from salts of carboxylic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a kind of methods of waste liquid production hydroxyacetic acid using CMC, it includes following following steps: (1) evaporating CMC hydroxyl sodium acetate and sodium chloride waste liquid at 50-100 DEG C by MVR evaporator, moisture removal and sodium chloride are removed, the liquid of hydroxy acid sodium is obtained；(2) liquid of the hydroxy acid sodium obtained in step (1) matches addition acid with acid 1:2-3 according to the liquid of hydroxyl sodium acetate and is acidified, and obtains the hydroxyacetic acid containing sodium salt；The acid is hydrochloric acid or sulfuric acid；(3) the hydroxyacetic acid solution by obtained in step (2) containing sodium salt by centrifuge be centrifugated or directly it is static isolate sodium salt, obtain hydroxyacetic acid.Design rationally, is skillfully constructed, and produces hydroxyacetic acid using the hydroxy acid sodium in waste liquid, realizes the useless water reuse of CMC.
Description
Technical field
The present invention relates to chemical fields；More particularly to a kind of method of waste liquid production hydroxyacetic acid using CMC.
Background technique
The waste liquid of the hydroxy acid sodium containing by-product can be generated in CMC production process, previous waste liquid is all by sewage
Direct emission after reason, no utilization.
The purposes of hydroxyacetic acid: the cleaning of electronic component, electronics scaling powder；The raw material of organic synthesis can produce fiber dye
Toner, Colourate for leather, detergent, the ingredient of welding compound, varnish ingredient, copper erosion agent, adhesive, plating medicament, breaking petroleum emulsion
Agent and metal-chelator etc..It also is used as chemical analysis reagent.
Summary of the invention
A kind of method that the present invention proposes waste liquid production hydroxyacetic acid using CMC, design rationally, are skillfully constructed, utilize
Hydroxy acid sodium in waste liquid produces hydroxyacetic acid, realizes the useless water reuse of CMC.
Technical solution of the present invention:
A method of hydroxyacetic acid being produced using the waste liquid of CMC, it includes following following steps:
(1) CMC hydroxyl sodium acetate and sodium chloride waste liquid is evaporated by MVR evaporator at 50-100 DEG C, goes to remove water
Point and sodium chloride, obtain the liquid of hydroxy acid sodium.
(2) liquid of the hydroxy acid sodium obtained in step (1) is matched according to the liquid of hydroxyl sodium acetate with acid 1:2-3
It is acidified than acid is added, obtains the hydroxyacetic acid containing sodium salt；The acid is hydrochloric acid or sulfuric acid.
(3) the hydroxyacetic acid solution by obtained in step (2) containing sodium salt by centrifuge be centrifugated or directly it is quiet
Sodium salt is only isolated, hydroxyacetic acid is obtained.
Above-mentioned technical proposal is improved further and is refined, CMC is sodium carboxymethylcellulose, production technology: is made
It uses chloroethene acid starting material to carry out etherification reaction production sodium carboxymethylcellulose as etherifying agent and alkali cellulose, and generates contain simultaneously
Hydroxy acid sodium and sodium chloride waste liquid.
Above-mentioned technical proposal is improved further and is refined, it is former to generate hydroxy acid sodium and sodium chloride reaction
Reason: ClCH2COOH+2NaOH→HOCH2COONa +NaCl+H2O。
Above-mentioned technical proposal is improved further and is refined, the hydrochloric acid described in step (2) need to carry out dripping under liquid
Add.
Above-mentioned technical proposal is improved further and is refined, in step (3) the quality of the hydroxy acid sodium
Index:
Appearance: light brown clear liquid；Acid content: and hydrochloric acid machine, >=14%；Hydroxyacetic acid content: COD, 300,000 ± 20,000
mg/L。
Above-mentioned technical proposal is improved further and is refined, sulfuric acid the reaction principle in step (2): is added:
2HOCH2COONa+H2SO4→2HOCH2COOH+Na2SO4；Or hydrochloric acid: HOCH is added2COONa+HCl→HOCH2COOH+NaCl。
A kind of solid-liquid separation centrifuge, which is characterized in that it include pedestal, shell, rotating cylinder, screw mechanism, first motor,
Second motor；Shell is set on the base, and enclosure interior is provided with accommodating chamber, is equipped with opening, accommodating chamber at the top of accommodating chamber
Room bottom is equipped with liquid outlet；Rotating cylinder is vertically arranged in accommodating chamber, and rotating cylinder inner vertical is provided with split cavity, split cavity
The closing of top opening bottom, cylinder sidewall are evenly arranged with several through-holes passed through for liquid, and through-hole is connected to accommodating chamber and divides
From chamber, screw mechanism includes turntable, bracket and helical blade, and turntable is horizontally disposed and is coaxially disposed with rotating cylinder, and turntable is logical
Bearing is crossed to be mounted at shell nozzle, bracket is located at below turntable and extends in rotating cylinder from turntable bottom, helical blade with turn
Disk coaxial arrangement and rack-mount, helical blade is located in rotating cylinder and it is far from turntable axis place straight line one end and rotating cylinder
Inner wall clearance fit, turntable inside are equipped with cavity, and cavity top is provided with feed inlet and bottom is provided with discharge port；First motor
It is drivingly connected with rotating cylinder for driving rotating cylinder to rotate around its shaft, the second motor is connect with screw mechanism for driving screw machine
Structure is rotated around rotating cylinder shaft.
When centrifugation, material to be separated passes through turntable cloth into rotating cylinder, by the high speed rotation of rotating cylinder, material to be separated
Liquid phase is thrown away by mesh, and the solid phase of material to be separated is attached to rotating cylinder inwall, while screw mechanism is rotated rotating cylinder inwall
Solid-phase material strikes off, and realization is rapidly and efficiently separated by solid-liquid separation.Pass through the spiral scraper type vertical centrifugal machine of above-mentioned optimization design, structure
Design is reasonable, on the one hand, in separation of solid and liquid process, helical blade can strike off solid phase from rotating cylinder, on the other hand, wait divide
Entered in rotating cylinder from material by the cavity in turntable, so that material is to enter rotating cylinder with the speed that rotating cylinder is angled in the same direction
It is interior, to improve solid-liquid separation effect in rotating cylinder.
Above-mentioned technical proposal is improved further and is refined, screw mechanism turns to identical and screw mechanism with rotating cylinder
Revolving speed is less than rotating cylinder revolving speed.
Above-mentioned technical proposal is improved further and is refined, the centrifuge is above-mentioned consolidates in step (3)
Liquid separates centrifuge.
The invention has the advantages that design is rationally, it is skillfully constructed, produces hydroxyacetic acid using the hydroxy acid sodium in waste liquid, it is real
The existing useless water reuse of CMC.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of solid-liquid separation centrifuge proposed by the present invention.
1 shell of pedestal, 2 rotating cylinder, 3 turntable, 41 bracket, 43 helical blade 42 in figure.
Specific embodiment
A method of hydroxyacetic acid being produced using the waste liquid of CMC, it includes following following steps:
(1) CMC hydroxyl sodium acetate and sodium chloride waste liquid is evaporated by MVR evaporator at 50-100 DEG C, goes to remove water
Point and sodium chloride, obtain the liquid of hydroxy acid sodium.
(2) liquid of the hydroxy acid sodium obtained in step (1) according to hydroxyl sodium acetate liquid and hydrochloric acid 1:2-3
Proportion is added hydrochloric acid and is acidified, and obtains the hydroxyacetic acid containing sodium salt.
(3) the hydroxyacetic acid solution by obtained in step (2) containing sodium salt by centrifuge be centrifugated or directly it is quiet
Sodium salt is only isolated, hydroxyacetic acid is obtained.
CMC is sodium carboxymethylcellulose, production technology: use chloroethene acid starting material as etherifying agent and alkali cellulose into
Row etherification reaction produces sodium carboxymethylcellulose, and generates hydroxyl sodium acetate and sodium chloride waste liquid simultaneously.
Generate hydroxy acid sodium and sodium chloride reaction principle: ClCH2COOH+2NaOH→HOCH2COONa +NaCl
+H2O。
The hydrochloric acid described in step (2) need to carry out being added dropwise under liquid.
The quality index of hydroxy acid sodium described in step (3):
Appearance: light brown clear liquid；Acid content: and hydrochloric acid machine, >=14%；Hydroxyacetic acid content: COD, 300,000 ± 20,000
mg/L。
Reaction principle in step (2): HOCH2COONa+HCl→HOCH2COOH+NaCl。
Embodiment 2
On the basis of implementing 1, the liquid of the hydroxy acid sodium obtained in step (1) according to hydroxyl sodium acetate liquid with
Sulfuric acid 1:2-3 proportion is added sulfuric acid and is acidified, and obtains the hydroxyacetic acid containing sodium salt.
As described in Figure, a kind of solid-liquid separation centrifuge, which is characterized in that it includes pedestal 1, shell 2, rotating cylinder 3, screw machine
Structure, first motor, the second motor；Shell 2 is arranged on pedestal 1, and shell 2 is internally provided with accommodating chamber, accommodating chamber top
Equipped with opening, accommodating chamber bottom is equipped with liquid outlet；Rotating cylinder 3 is vertically arranged in accommodating chamber, and rotating cylinder inner vertical is provided with
Split cavity, the closing of split cavity top opening bottom, 3 side wall of rotating cylinder are evenly arranged with several through-holes passed through for liquid, lead to
Hole is connected to accommodating chamber and split cavity, screw mechanism include turntable 41, bracket 43 and helical blade 42, and 41 level of turntable is set
Set and be coaxially disposed with rotating cylinder 3, turntable 41 is mounted on 2 opening of shell by bearing, bracket 43 be located at below turntable 41 and from
41 bottom of turntable extends in rotating cylinder 3, and helical blade 42 and turntable 41 are coaxially disposed and are mounted on bracket 43, helical blade 42
In rotating cylinder 3 and it is far from straight line one end where turntable axis and 3 inner wall clearance fit of rotating cylinder, is equipped with sky inside turntable 41
Chamber, cavity top is provided with feed inlet and bottom is provided with discharge port；First motor and rotating cylinder 3 are drivingly connected for driving rotating cylinder
3 rotate around its shaft, and the second motor is connect for driving screw mechanism to rotate around rotating cylinder shaft with screw mechanism；Screw machine
Structure and rotating cylinder turn to identical and screw mechanism revolving speed less than rotating cylinder revolving speed.
Due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common of the art
For technical staff, without departing from the principle of the present invention, can also make it is several improve, retouching or variation, can also be with
Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination, or not improved by invention
Conception and technical scheme directly apply to other occasions, are regarded as protection scope of the present invention.
Claims (9)
1. a kind of method of the waste liquid production hydroxyacetic acid using CMC, it is characterised in that: it includes following following steps:
(1) CMC hydroxyl sodium acetate and sodium chloride waste liquid is evaporated by MVR evaporator at 50-100 DEG C, goes to remove water
Point and sodium chloride, obtain the liquid of hydroxy acid sodium；
(2) liquid of the hydroxy acid sodium obtained in step (1) adds according to liquid and acid the 1:2-3 proportion of hydroxyl sodium acetate
Enter acid to be acidified, obtains the hydroxyacetic acid containing sodium salt；The acid is hydrochloric acid or sulfuric acid；
(3) the hydroxyacetic acid solution by obtained in step (2) containing sodium salt passes through centrifuge centrifuge separation or directly static point
Sodium salt is separated out, hydroxyacetic acid is obtained.
2. a kind of method of waste liquid production hydroxyacetic acid using CMC according to claim 1, it is characterised in that: CMC
For sodium carboxymethylcellulose, production technology: chloroethene acid starting material is used to carry out etherification reaction as etherifying agent and alkali cellulose
Sodium carboxymethylcellulose is produced, and generates hydroxyl sodium acetate and sodium chloride waste liquid simultaneously.
3. a kind of method of waste liquid production hydroxyacetic acid using CMC according to claim 2, it is characterised in that: generate
Hydroxy acid sodium and sodium chloride reaction principle: ClCH2COOH+2NaOH → HOCH2COONa+NaCl+H2O.
4. a kind of method of waste liquid production hydroxyacetic acid using CMC according to claim 1, it is characterised in that: in step
Suddenly hydrochloric acid described in (2) need to carry out being added dropwise under liquid.
5. a kind of method of waste liquid production hydroxyacetic acid using CMC according to claim 1, it is characterised in that: in step
Suddenly the quality index of hydroxy acid sodium described in (3):
Appearance: light brown clear liquid；Acid content: and hydrochloric acid machine, >=14%；Hydroxyacetic acid content: COD, 300,000 ± 20,000
mg/L。
6. a kind of method of waste liquid production hydroxyacetic acid using CMC according to claim 1, it is characterised in that: in step
Suddenly sulfuric acid: 2HOCH2COONa+H2SO4 → 2HOCH2COOH+Na2SO4 the reaction principle in (2): is added；Or hydrochloric acid is added:
HOCH2COONa+HCl→HOCH2COOH+NaCl。
7. a kind of solid-liquid separation centrifuge, which is characterized in that it includes pedestal, shell, rotating cylinder, screw mechanism, first motor,
Two motors；Shell is set on the base, and enclosure interior is provided with accommodating chamber, is equipped with opening, accommodating chamber at the top of accommodating chamber
Bottom is equipped with liquid outlet；Rotating cylinder is vertically arranged in accommodating chamber, and rotating cylinder inner vertical is provided with split cavity, disengagement chamber ceiling
The closing of portion's open bottom, cylinder sidewall are evenly arranged with several through-holes passed through for liquid, through-hole be connected to accommodating chamber with separate
Chamber, screw mechanism include turntable, bracket and helical blade, and turntable is horizontally disposed and is coaxially disposed with rotating cylinder, and turntable passes through
Bearing is mounted at shell nozzle, and bracket is located at below turntable and extends in rotating cylinder from turntable bottom, helical blade and turntable
It is coaxially disposed and rack-mount, helical blade is located in rotating cylinder and it is far from turntable axis place straight line one end and rotating cylinder
Wall clearance fit, turntable inside are equipped with cavity, and cavity top is provided with feed inlet and bottom is provided with discharge port；First motor with
Rotating cylinder is drivingly connected for driving rotating cylinder to rotate around its shaft, and the second motor is connect with screw mechanism for driving screw mechanism
It is rotated around rotating cylinder shaft.
8. spiral scraper type vertical centrifugal machine according to claim 7, which is characterized in that screw mechanism turns to phase with rotating cylinder
Same and screw mechanism revolving speed is less than rotating cylinder revolving speed.
9. a kind of method of waste liquid production hydroxyacetic acid using CMC according to claim 1, which is characterized in that in step
Suddenly centrifuge described in (3) is solid-liquid separation centrifuge described in claim 7-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940828.3A CN109289298A (en) | 2018-08-17 | 2018-08-17 | Utilize the method for the waste liquid production hydroxyacetic acid of CMC |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940828.3A CN109289298A (en) | 2018-08-17 | 2018-08-17 | Utilize the method for the waste liquid production hydroxyacetic acid of CMC |
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| CN109289298A true CN109289298A (en) | 2019-02-01 |
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| CN201810940828.3A Pending CN109289298A (en) | 2018-08-17 | 2018-08-17 | Utilize the method for the waste liquid production hydroxyacetic acid of CMC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115072865A (en) * | 2022-06-28 | 2022-09-20 | 福建省恒创环保科技有限公司 | Biological denitrification composite carbon source for sewage treatment and application thereof |
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|---|---|---|---|---|
| CN102206014A (en) * | 2010-03-30 | 2011-10-05 | 中国科学院理化技术研究所 | Sodium carboxymethylcellulose (CMC) production waste water treatment and valuable ingredient comprehensive use process |
| CN102381782A (en) * | 2011-09-22 | 2012-03-21 | 江门市慧信净水材料有限公司 | Recovery treatment method for wastewater generated in production of carboxymethyl cellulose |
| CN104370312A (en) * | 2014-06-18 | 2015-02-25 | 江南大学 | Recycling processing technology for high-salt wastewater during carboxymethyl cellulose production |
| CN105880042A (en) * | 2016-05-09 | 2016-08-24 | 蚌埠市兴利离心机制造有限公司 | Spiral scraping type vertical centrifugal machine |
-
2018
- 2018-08-17 CN CN201810940828.3A patent/CN109289298A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206014A (en) * | 2010-03-30 | 2011-10-05 | 中国科学院理化技术研究所 | Sodium carboxymethylcellulose (CMC) production waste water treatment and valuable ingredient comprehensive use process |
| CN102381782A (en) * | 2011-09-22 | 2012-03-21 | 江门市慧信净水材料有限公司 | Recovery treatment method for wastewater generated in production of carboxymethyl cellulose |
| CN104370312A (en) * | 2014-06-18 | 2015-02-25 | 江南大学 | Recycling processing technology for high-salt wastewater during carboxymethyl cellulose production |
| CN105880042A (en) * | 2016-05-09 | 2016-08-24 | 蚌埠市兴利离心机制造有限公司 | Spiral scraping type vertical centrifugal machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115072865A (en) * | 2022-06-28 | 2022-09-20 | 福建省恒创环保科技有限公司 | Biological denitrification composite carbon source for sewage treatment and application thereof |
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Application publication date: 20190201 |