CN100361952C - Method for preparing methyl formate from formate recovered from epoxy soybean oil waste water - Google Patents
Method for preparing methyl formate from formate recovered from epoxy soybean oil waste water Download PDFInfo
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- CN100361952C CN100361952C CNB2006100491174A CN200610049117A CN100361952C CN 100361952 C CN100361952 C CN 100361952C CN B2006100491174 A CNB2006100491174 A CN B2006100491174A CN 200610049117 A CN200610049117 A CN 200610049117A CN 100361952 C CN100361952 C CN 100361952C
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- 239000002351 wastewater Substances 0.000 title claims abstract description 51
- 235000012424 soybean oil Nutrition 0.000 title claims abstract description 34
- 239000003549 soybean oil Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000004593 Epoxy Substances 0.000 title claims description 28
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 title abstract description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 title description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 150
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims abstract description 119
- 235000019253 formic acid Nutrition 0.000 claims abstract description 60
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003921 oil Substances 0.000 claims abstract description 18
- 235000019198 oils Nutrition 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000009833 condensation Methods 0.000 claims description 20
- 230000005494 condensation Effects 0.000 claims description 20
- 239000000498 cooling water Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 239000004519 grease Substances 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000003054 catalyst Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 238000004821 distillation Methods 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract 2
- 239000000047 product Substances 0.000 abstract 2
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 11
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 10
- 239000002994 raw material Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000032050 esterification Effects 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- 150000002632 lipids Chemical class 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006735 epoxidation reaction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NHILTLCHCJZAHV-UHFFFAOYSA-N C(O)(O)=O.CNC=O Chemical compound C(O)(O)=O.CNC=O NHILTLCHCJZAHV-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- 101000713575 Homo sapiens Tubulin beta-3 chain Proteins 0.000 description 1
- 101000713585 Homo sapiens Tubulin beta-4A chain Proteins 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- SCKXCAADGDQQCS-UHFFFAOYSA-N Performic acid Chemical compound OOC=O SCKXCAADGDQQCS-UHFFFAOYSA-N 0.000 description 1
- 102100036790 Tubulin beta-3 chain Human genes 0.000 description 1
- 102100036788 Tubulin beta-4A chain Human genes 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000006315 carbonylation Effects 0.000 description 1
- 238000005810 carbonylation reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- WBJINCZRORDGAQ-UHFFFAOYSA-N ethyl formate Chemical compound CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- CXHHBNMLPJOKQD-UHFFFAOYSA-M methyl carbonate Chemical compound COC([O-])=O CXHHBNMLPJOKQD-UHFFFAOYSA-M 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- -1 sterilant Substances 0.000 description 1
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Abstract
The present invention discloses a method for preparing methyl formate by recovering formic acid from the wastewater of epoxidized soybean oil, which belongs to a technology of resource recovery in wastewater treatment. The present invention provides the scheme that the effluent wastewater of formic acid from the production of epoxidized soybean oil is added to an oil to separating groove with a sloping plate to separate most of epoxidized soybean oil drops and precipitates; the upper oil drops are recovered as products, lower precipitates are discharged, and the wastewater is made to enter a reactor; reaction temperature and the addition quantity of a catalyst are controlled; methanol is dropped in the reactor, and kettle top steam is recovered by condensing to obtain mixed liquid of methyl formate, methanol, formic acid and water; the mixed liquid is made to enter a rectifying tower for further distillation so as to obtain a product of methyl formate. The preparation method achieves the wastewater recovery of the formic acid of epoxidized soybean oil, and the recovery economic benefits are obvious. Because the preparation method recovers and uses resource in wastewater treatment, the pollutant concentration of wastewater is greatly reduced, and the economic benefits are increased.
Description
Technical field
The invention belongs to a kind of processing method that reclaims resource in waste water treatment, specifically is the method for preparation, rectifying methyl-formiate from the formic acid wastewater of epoxy soybean oil production discharging.
Background technology
The production of epoxy soybean oil is that to adopt refined soybean oil, formic acid, hydrogen peroxide be raw material, under given conditions, makes the soybean oil epoxidation generate epoxy soybean oil.In process of production, formic acid plays instrumentality in whole epoxy reaction system, and its concentration has taken place significantly to change, and drops to about 8% by original 85%.By analyzing, the waste water index is: pH3.5～4, and colourless, contain lipid 500mg/L, formic acid is about 8%, hydrogen peroxide about 0.9% and a small amount of peroxyformic acid, the on average about 20000mg/L of COD.The acid-bearing wastewater of high COD like this lacks corresponding Technology of Sewage on the one hand, and on the other hand, processing cost is high, and business burden is heavy.So, must look for another way, reclaim the formic acid in the waste water, realize resource utilization, to reduce cost of sewage disposal.
Methyl-formiate has another name called formic acid methyl ester, is current C
1One of focus of chemical developer is as C
1The middle tie of chemistry more and more comes into one's own.From methyl-formiate, can prepare formic acid, acetic acid, ethylene glycol, aceticanhydride, methyl propionate, methyl acrylate, methyl glycolate, N, a series of a feast for the eyes derived product such as dinethylformamide (DMF), N-methylformamide carbonic acid, methylcarbonate, methyl alcohol, DL-glycine.On agricultural, its useful as pesticides, sterilant, agent for tobacco treatment, fruit siccative etc.Since the nineties, the scientific research personnel finds that again methyl-formiate can replace petroleum chemicals MTBE, makes gasoline high-octane rating additive.Therefore, the methyl-formiate range of application is wide, and market outlet is better.
The synthesis technique of methyl-formiate mainly contains: the formic acid esterification method; Methanol carbonylation; The methanol dehydrogenation method; (4) formaldehyde dimerization method; Carbonic acid gas and methyl alcohol hydrogenation condensation method; 6 kinds of synthetic gas direct synthesis techniques etc.
The present invention proposes the method for preparation, rectifying methyl-formiate from the formic acid wastewater of epoxy soybean oil production discharging, and its purpose is to reclaim resource from sewage disposal, utilize resource, greatly reduces the concentration of pollutent in the sewage, increases economic efficiency.
Summary of the invention
Contain the formic acid of 5%-15% from the formic acid wastewater of epoxy soybean oil production discharging, can add methyl alcohol, make methyl alcohol and formic acid directly carry out esterification, thereby reach the purpose that turns waste into wealth, reaction formula is:
HCOOH+CH
3OH→HCOOCH
3+H
2O
The scheme that the present invention proposes is: excluding most of epoxy soybean oil oil droplet and throw out in the formic acid wastewater adding inclined plate grease groove of epoxy soybean oil production discharging, the upper strata oil droplet reclaims as product, the discharging of lower sediment thing, and waste water enters in the reactor; The dosage of control reaction temperature and catalyzer drips methyl alcohol, and top steam is reclaimed in condensation must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid; Mixed solution enters the further distillation of rectifying tower and obtains formic ether product.This production method realizes the recovery of epoxy soybean oil formic acid, reclaims remarkable in economical benefits.
Method of the present invention comprises the steps:
(1) will produce in the formic acid wastewater adding inclined plate grease groove of epoxy soybean oil discharging, and exclude most of epoxy soybean oil oil droplet and throw out, the upper strata oil droplet reclaims as product, and sediment discharge, waste water enter in the reactor;
(2) control reaction temperature is 30～60 ℃, the vitriol oil with 98% is as catalyzer, the dosage of catalyzer is 0.2～5% of a wastewater volume, under agitation condition, drip methyl alcohol, with molar concentration meter methyl alcohol addition is 1～3 times of amount of formic acid in the waste water, top steam is reclaimed in condensation, must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid;
(3) with batch fractionating tower with the row evaporation again of step (2) gained methyl-formiate, methyl alcohol, formic acid, water mixed liquid, with the steam of cooling water condensation gas phase temperature between 30～60 ℃, collect phlegma, methyl-formiate content promptly reclaims as product greater than 98.5% in the phlegma that mensuration is collected;
(4) with the steam of cooling water condensation gas phase temperature between 80～90 ℃, and collect phlegma, methanol content promptly is back to step (2) greater than 60% in the phlegma that mensuration is collected.
Description of drawings
Fig. 1 is a methyl-formiate method waste water reclamation main technique schema.
Embodiment
Below the water quality of formic acid wastewater of the used epoxy soybean oil production of three routine embodiment discharging as shown in table 1:
Table 1 waste water quality
| Title | Concentration |
| Formic acid | 5～15％ |
| Hydrogen peroxide | 0.9％ |
| Lipid | 500mg/L |
| CODcr | 20000mg/L |
| pH | 3.5～4 |
| Color | Colourless |
Embodiment one:
The raw material waste water of 1 ton of water quality as described in Table 1 is added in the inclined plate grease groove (hydraulic detention time 1h), exclude 99% epoxy soybean oil oil droplet, the upper strata oil droplet reclaims as product, and sediment discharge, waste water enter in the reactor; The dosage (0.2～1%) of control reaction temperature (30 ℃) and 98% concentrated sulfuric acid catalyst, stir and to drip methyl alcohol (is 1.5 times of amount of formic acid in the waste water with molar concentration meter methyl alcohol addition) down, top steam is reclaimed in condensation must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid; With batch fractionating tower with the row evaporation again of gained methyl-formiate, methyl alcohol, formic acid, water mixed liquid, with the steam of cooling water condensation gas phase temperature between 30-33 ℃, and the collection phlegma, in the phlegma of measure collecting methyl-formiate content greater than 99.5%, the rate of recovery of formic acid＞90%; With the steam of cooling water condensation gas phase temperature between 80-85 ℃, and collect phlegma, methanol content is disregarded reaction consumes, the rate of recovery of excessive methanol＞90% greater than 80% in the phlegma that mensuration is collected.
In the entire treatment process, discharge 0.8 ton of waste water (formic acid＜1%, methyl alcohol＜1%, CODcr＜5000mg/L).
Embodiment two:
The raw material waste water of 1 ton of water quality as described in Table 1 is added in the inclined plate grease groove (hydraulic detention time 3h), exclude 99.5% epoxy soybean oil oil droplet, the upper strata oil droplet reclaims as product, and sediment discharge, waste water enter in the reactor; The dosage (1～3%) of control reaction temperature (40 ℃) and 98% concentrated sulfuric acid catalyst, stir and to drip methyl alcohol (is 3 times of amount of formic acid in the waste water with molar concentration meter methyl alcohol addition) down, top steam is reclaimed in condensation must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid; With batch fractionating tower with the row evaporation again of gained methyl-formiate, methyl alcohol, formic acid, water mixed liquid, with the steam of cooling water condensation gas phase temperature between 30-35 ℃, and the collection phlegma, in the phlegma of measure collecting methyl-formiate content greater than 99%, the rate of recovery of formic acid＞92%; With the steam of cooling water condensation gas phase temperature between 85-90 ℃, and collect phlegma, methanol content is disregarded reaction consumes, the rate of recovery of excessive methanol＞95% greater than 85% in the phlegma that mensuration is collected.
In the entire treatment process, discharge 0.8 ton of waste water (formic acid＜0.8%, methyl alcohol＜0.5%, CODcr＜3500mg/L).
Embodiment three:
The raw material waste water of 1 ton of water quality as described in Table 1 is added in the inclined plate grease groove (hydraulic detention time 3h), exclude 99.5% epoxy soybean oil oil droplet, the upper strata oil droplet reclaims as product, and sediment discharge, waste water enter in the reactor; The dosage (4～5%) of control reaction temperature (60 ℃) and 98% concentrated sulfuric acid catalyst, stir and to drip methyl alcohol (is 2.5 times of amount of formic acid in the waste water with molar concentration meter methyl alcohol addition) down, top steam is reclaimed in condensation must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid; With batch fractionating tower with the row evaporation again of gained methyl-formiate, methyl alcohol, formic acid, water mixed liquid, with the steam of cooling water condensation gas phase temperature between 30-60 ℃, and the collection phlegma, in the phlegma of measure collecting methyl-formiate content greater than 98.5%, the rate of recovery of formic acid＞95%; With the steam of cooling water condensation gas phase temperature between 80-90 ℃, and collect phlegma, methanol content is disregarded reaction consumes, the rate of recovery of excessive methanol＞97% greater than 60% in the phlegma that mensuration is collected.
In the entire treatment process, discharge 0.8 ton of waste water (formic acid＜0.5%, methyl alcohol＜0.5%, CODcr＜2500mg/L).
Engineering construction example: 20000t/a epoxy soybean oil formic acid wastewater reuse project
It is raw material that refined soybean oil, formic acid, hydrogen peroxide are adopted in the production of certain factory's epoxy soybean oil, and epoxidation 8h gets the epoxy soybean oil production in reactor.This factory produces epoxy soybean oil 15000t per year, and discharging contains calculates waste water 20000t/a (on average about 70t/d), and water quality is: pH3.5, and colourless, contain lipid 800mg/L, formic acid 8-12%, hydrogen peroxide are about 1.0%, the on average about 20000mg/L of COD.
1. technical process
Certain 20000t/a epoxy soybean oil formic acid wastewater reuse project as shown in Figure 1.
1.1 the pre-treatment of waste water
Use 4t/h, the water pump of 30m lift pumps into the formic acid wastewater (formic acid concn is 8%) of epoxy soybean oil production discharging in the inclined plate grease groove (hydraulic detention time 2h), excludes 99% epoxy soybean oil oil droplet, and the upper strata oil droplet reclaims as product, sediment discharge, waste water enters in the reactor.
1.2 esterification
The dosage (2.5%) of control reaction temperature (50 ℃) and 98% concentrated sulfuric acid catalyst, stir and to drip methyl alcohol (is 2.0 times of amount of formic acid in the waste water with molar concentration meter methyl alcohol addition) down, top steam is reclaimed in condensation must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid;
1.3 rectifying
With batch fractionating tower with the row evaporation again of gained methyl-formiate, methyl alcohol, formic acid, water mixed liquid, with the steam of cooling water condensation gas phase temperature between 30-50 ℃, and the collection phlegma, in the phlegma of measure collecting methyl-formiate content greater than 99%, the rate of recovery of formic acid＞92%; With the steam of cooling water condensation gas phase temperature between 85-90 ℃, and collect phlegma, methanol content is disregarded reaction consumes, the rate of recovery of excessive methanol＞96% greater than 82% in the phlegma that mensuration is collected.
In the entire treatment process, the average water quality of waste discharge is: formic acid＜0.8%, methyl alcohol＜0.5%, CODcr＜3500mg/L.
2. equipment
Required major equipment sees Table 2.About 500,000 yuan of facility investment, floor space 100m
2
Table 2 methyl-formiate technology major equipment table look-up
| Sequence number | Device name | Specification | Quantity | Remarks |
| 1 | The inclined plate grease groove | 1 | PVC | |
| 2 | Esterifying kettle | 10t | 1 | Liner enamel |
| 3 | Topping still | Φ500 | 1 | SS |
| 4 | Rectifying tower | Φ500 | 1 | SS |
| 5 | The packing still | 3m 3 | 1 | SS |
| 6 | Water pump | 2 | SS |
3. cost keeping
1t contains 8% formic acid wastewater calcium formiate method processing cost and saw Table for 3 (containing formic acid 8% waste water to reclaim 1 ton).
Table 3 methyl-formiate processing wastewater processing cost and income statement
| Sequence number | Project | Consumption | The amount of money (unit) |
| 1 | Methyl alcohol * | 56kg | -320 |
| 2 | Electricity | 30 degree | -60 |
| 3 | Steam consumption | 0.6t | -138 |
| 4 | Packing | -100 | |
| 5 | Wage and welfare | -20 | |
| 6 | Depreciation | -20 | |
| Processing cost adds up to | -658 | ||
| Reclaim methyl-formiate | 70kg | 1040 | |
| Handle income | 382 |
*: in the reaction, the rate of recovery of excessive methanol is calculated by 90%.
As shown in Table 3, the waste water of 20000t/a its to reclaim economic direct benefit be 3,820,000 yuan, save nearly 2,000,000 yuan of cost of sewage disposal simultaneously, can be enterprise and bring 5,820,000 yuan of direct economic benefits, the remarkable in economical benefits of this method.
Claims (1)
1. reclaim the method that formic acid is produced methyl-formiate from epoxy soybean oil waste water, the content of described formic acid in epoxy soybean oil waste water is 5～15%, it is characterized in that following step:
(1) will produce in the waste water adding inclined plate grease groove that contains 5～15% formic acid of epoxy soybean oil discharging, and exclude most of epoxy soybean oil oil droplet and throw out, the upper strata oil droplet reclaims as product, and sediment discharge, waste water enter in the reactor;
(2) control reaction temperature is 30～60 ℃, the vitriol oil with 98% is as catalyzer, the dosage of catalyzer is 0.2～5% of a wastewater volume, under agitation condition, drip methyl alcohol, with molar concentration meter methyl alcohol addition is 1～3 times of amount of formic acid in the waste water, top steam is reclaimed in condensation, must contain methyl-formiate, methyl alcohol, formic acid, water mixed liquid;
(3) with batch fractionating tower with the row evaporation again of step (2) gained methyl-formiate, methyl alcohol, formic acid, water mixed liquid, with the steam of cooling water condensation gas phase temperature between 30～60 ℃, collect phlegma, methyl-formiate content promptly reclaims as product greater than 98.5% in the phlegma that mensuration is collected;
(4) with the steam of cooling water condensation gas phase temperature between 80～90 ℃, and collect phlegma, methanol content promptly is back to step (2) greater than 60% in the phlegma that mensuration is collected.
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|---|---|---|---|
| CNB2006100491174A CN100361952C (en) | 2006-01-17 | 2006-01-17 | Method for preparing methyl formate from formate recovered from epoxy soybean oil waste water |
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| CN103360231A (en) * | 2012-03-28 | 2013-10-23 | 江苏卡特新能源有限公司 | Method for extracting formic acid from sewage from production of epoxy biological plasticizer |
| CN106478630B (en) * | 2016-10-10 | 2019-05-17 | 湖北省宏源药业科技股份有限公司 | Method for treating waste liquid in guanine preparation process |
| CN106495174B (en) * | 2016-12-02 | 2018-08-07 | 中科院广州能源所盱眙凹土研发中心 | Attapulgite wet method bisgallic acid activation method |
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Non-Patent Citations (2)
| Title |
|---|
| 无溶剂法快速制备环氧大豆油的研究. 高广颖等.化学工程师，第2期. 2001 * |
| 环氧脂肪酸酯类增塑剂生产废水综合利用的探讨. 张建伟.中国油脂，第19卷第2期. 1994 * |
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