BE336823A - - Google Patents
Info
- Publication number
- BE336823A BE336823A BE336823DA BE336823A BE 336823 A BE336823 A BE 336823A BE 336823D A BE336823D A BE 336823DA BE 336823 A BE336823 A BE 336823A
- Authority
- BE
- Belgium
- Prior art keywords
- precipitate
- washing
- water
- treated
- filtering
- Prior art date
Links
- 239000003925 fat Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 210000002268 Wool Anatomy 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000015450 Tilia cordata Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 235000010755 mineral Nutrition 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 239000000344 soap Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 238000010908 decantation Methods 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 238000004821 distillation Methods 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000009830 intercalation Methods 0.000 claims 1
- 230000002687 intercalation Effects 0.000 claims 1
- 239000001187 sodium carbonate Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 239000003643 water by type Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 description 4
- 230000001264 neutralization Effects 0.000 description 4
- 238000005273 aeration Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L cacl2 Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 235000005824 corn Nutrition 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001376 precipitating Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B11/00—Recovery or refining of other fatty substances, e.g. lanolin or waxes
- C11B11/005—Lanolin; Woolfat
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Description
<Desc/Clms Page number 1>
"Procédé d'extraction et de raffinage des matières grasses conte- nues dans les eaux résiduaires de lavage des corps, tels que la laine, et d'obtention d'eau pure pouvant 'être réemployée pour le @ lavage".
@ La présente invention a pour objet un procédé d'extraction, et de raffinage des matières grasses contenues dans les eaux résidu-
EMI1.1
t,i:.'ei3 de lavage des corp.3 oonteaant des matières grasses, et notam- ment la laine, ainsi que d'obtention d'eau pure pouvant 'être réem- ployée dans le lavage.
' Ces eaux résiduaires, qu'elles aient ou non subi un traitement préalable, par exemple par aération ou barattage ou par essorage, en vue d'une première extraction de la matière grasse, (graisse neutre de suint, par exemple), contiennent des matières grasses, et les impuretés organiques et inorganiques avec des savons solu - bles et insolubles.
Elles sont traitées jusqu'ici, soit en vue de leur" épuration, soit dans le but d'en extraire les matières y contenues,'par des précipitants divers : acides minéraux, sulfate d'alumine, chlorure de calcium, chaux, etc... et on obtient par filtrage ou par décanta-
<Desc/Clms Page number 2>
tion un précipité qui renferme les cors gras, savons ou acides gras, impuretés diverses, organiques et autres . Le filtrat est une eau fortement dégrossie, mais renfermant encore en dissolution des sels correspondants du ou des précipitants employés, en même temps que l'excès de ceux-ci, et des impuretés la rendant impropre, soit. au rejet dans les cours d'eau, soit à son réemploi dans le lavage.
Dans certains cas, le précipité est pressé avec ou sans ajou- te de vapeur, ce. qui fait filtrer les huiles ou graisses y conte-. nues. Nais ce procédé présente le grand inconvénient de n'extraire qu'une partie des matières grasses, les impuretés mécaniques en re- tenant une très notable proportion.
Suivant d'autres procédés, la matière grasse est extraite du précipité par des dissolvants appropriés, mais ces méthodes sont coûteuses et à faible rendement.
Dans le procédé de l'invention, le précipité est soumis.à la distillation dans un courant de vapeur surchauffée ou non, soit à feu vif, soit dans le vide, ce qui permet d'en recueillir directe- ment les matières grasses dans un état de grande pureté, les rési- dus minéraux restant dans le fond de la cornue..
Les eaux dégrossies (eaux séparées du précipité) sont traitées suivant le.s précipitants employés, soit quand on a employé l'acide sulfurique,par de la chaux suivie de carbonate de soude (avec fil- tration ou décantation entre les deux traitements), soit'quand on a employé le sulfate d'alumine, par le carbonate de soude seul. Après filtrage sur du coke suivi de sable, les eaux ainsi traitées peu- vent 'être réemployées au lavage, étant dans un état parfait d'adou- cissement et de clarification.
Cette méthode s'adopte notamment fort utilement dans le cas des eaux résiduaires de lavage - spécialement de la laine - qui ont déjà subi un premier traitement d'extraction de graisse neutre par une des méthodes connues, telles que : essorage, aération, etc....
Ces procédés n'extraient qu'une partie de la graisse neutre et don-' nent une eau retenant toutes les autres matières, en même temps que le réglant de la graisse neutre.
<Desc / Clms Page number 1>
"A method of extracting and refining the fats contained in waste water from washing bodies, such as wool, and obtaining pure water which can be reused for washing".
@ The present invention relates to a process for extracting and refining the fats contained in the waste water.
EMI1.1
t, i:. 'ei3 for washing bodies containing fats, and in particular wool, as well as obtaining pure water which can be reused in washing.
'This wastewater, whether or not it has undergone prior treatment, for example by aeration or churning or by dewatering, with a view to a first extraction of the fat, (neutral grease grease, for example), contain fatty matter, and organic and inorganic impurities with soluble and insoluble soaps.
They have so far been treated, either with a view to their "purification, or with the aim of extracting therefrom the materials contained therein, by various precipitants: mineral acids, alumina sulphate, calcium chloride, lime, etc." .. and one obtains by filtering or by settling
<Desc / Clms Page number 2>
tion a precipitate which contains fatty corns, soaps or fatty acids, various impurities, organic and others. The filtrate is a highly coarse water, but still containing in solution the corresponding salts of the precipitating agent (s) employed, at the same time as the excess thereof, and impurities making it unsuitable, ie. discharge into watercourses, or its reuse in washing.
In some cases, the precipitate is pressed with or without the addition of steam. which filters the oils or fats contained therein. naked. However, this process has the great drawback of extracting only a part of the fat, the mechanical impurities while retaining a very significant proportion.
According to other methods, the fat is extracted from the precipitate by suitable solvents, but these methods are expensive and in low yield.
In the process of the invention, the precipitate is subjected to distillation in a stream of superheated or non-superheated steam, either over high heat or in vacuum, which makes it possible to collect the fat directly from it in a tank. state of high purity, the mineral residues remaining in the bottom of the retort.
The coarse water (water separated from the precipitate) is treated according to the precipitants used, either when sulfuric acid has been used, with lime followed by soda ash (with filtration or decantation between the two treatments), or 'when alumina sulphate has been used, by carbonate of soda alone. After filtering through coke followed by sand, the water thus treated can be reused in washing, being in a perfect state of softening and clarification.
This method is particularly useful in the case of washing wastewater - especially wool - which has already undergone a first neutral fat extraction treatment by one of the known methods, such as: spinning, aeration, etc. ...
These methods extract only a portion of the neutral fat and provide water retaining all other material, along with setting it neutral fat.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE336823A true BE336823A (en) |
Family
ID=15043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE336823D BE336823A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE336823A (en) |
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0
- BE BE336823D patent/BE336823A/fr unknown
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