IL28438A - Process and composition for preserving aqueous systems - Google Patents
Process and composition for preserving aqueous systemsInfo
- Publication number
- IL28438A IL28438A IL28438A IL2843867A IL28438A IL 28438 A IL28438 A IL 28438A IL 28438 A IL28438 A IL 28438A IL 2843867 A IL2843867 A IL 2843867A IL 28438 A IL28438 A IL 28438A
- Authority
- IL
- Israel
- Prior art keywords
- oil
- composition
- water
- water used
- aqueous systems
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 9
- 239000003921 oil Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 4
- 239000010730 cutting oil Substances 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 2
- 241000195493 Cryptophyta Species 0.000 claims 1
- 241000233866 Fungi Species 0.000 claims 1
- SKDNDVDHYMEGNJ-VURMDHGXSA-N [(e)-2-bromo-2-nitroethenyl]benzene Chemical compound [O-][N+](=O)C(\Br)=C/C1=CC=CC=C1 SKDNDVDHYMEGNJ-VURMDHGXSA-N 0.000 claims 1
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- HTSGKJQDMSTCGS-UHFFFAOYSA-N 1,4-bis(4-chlorophenyl)-2-(4-methylphenyl)sulfonylbutane-1,4-dione Chemical compound C1=CC(C)=CC=C1S(=O)(=O)C(C(=O)C=1C=CC(Cl)=CC=1)CC(=O)C1=CC=C(Cl)C=C1 HTSGKJQDMSTCGS-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- LCALQRGCGSVXMU-UHFFFAOYSA-N 1,2-dibromo-3-(2-nitroethyl)benzene Chemical compound [O-][N+](=O)CCC1=CC=CC(Br)=C1Br LCALQRGCGSVXMU-UHFFFAOYSA-N 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 238000009631 Broth culture Methods 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 241000607598 Vibrio Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000031709 bromination Effects 0.000 description 1
- 238000005893 bromination reaction Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- SPQUPNFNFAQPOF-UHFFFAOYSA-L dipotassium;pyridine;carbonate Chemical compound [K+].[K+].[O-]C([O-])=O.C1=CC=NC=C1 SPQUPNFNFAQPOF-UHFFFAOYSA-L 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000013207 serial dilution Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/23—Organic compounds containing nitrogen containing at least one nitrogen-to-oxygen bond, e.g. nitro-compounds, nitrates, nitrites
- C10L1/231—Organic compounds containing nitrogen containing at least one nitrogen-to-oxygen bond, e.g. nitro-compounds, nitrates, nitrites nitro compounds; nitrates; nitrites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
- C07C205/08—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to acyclic carbon atoms
- C07C205/09—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to acyclic carbon atoms of an unsaturated carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
- C07C205/11—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/27—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups
- C07C205/32—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups bound to acyclic carbon atoms and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G32/00—Refining of hydrocarbon oils by electric or magnetic means, by irradiation, or by using microorganisms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/30—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms containing a nitrogen-to-oxygen bond
- C10M133/32—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms containing a nitrogen-to-oxygen bond containing a nitro group
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/061—Carbides; Hydrides; Nitrides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/16—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/18—Ammonia
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/20—Containing nitrogen-to-oxygen bonds
- C10M2215/202—Containing nitrogen-to-oxygen bonds containing nitro groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
- C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Paper (AREA)
- Lubricants (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Description
Process and composition for preserving aqueous systems GIE SOCIETE 26980 may be pre ared by atlng and then dehydrdbrominating Bromination is accomplished by adding an equimolar tity of bromine to dissolved in a suitable solvent such as chloroform at temperatures from to reflux temperature with agitation periods of minutes to four To form the resulting dibromo nitroethyl benzene is dehydrobrominated in suitable such as chloroform or by the addition o a dehydrohalogenating agent such as pyridine potassium carbonate at ambient to reflux It has been found that is in against a broad spectrum microorganisms which attack Examples of some of these microorganisms both in acid and basic and in the presence of substantial amounts of nonionic may be used by adding it to the compositions in any suitable For the incorporation can be effected either during the preparation of the composition ot after the sition has been When oil is present in the aqueous may be dissolved initially the oil phase preparation of the final product or may be added directly to the finished concentration of test was concentration of required for complete inhibition of Aeruginosa cutting oil Week 1 2 4 Example 2 Sulphate reducing bacteria have been of concern regarding flood water operations employed in secondary oil organisms produce quantities of hydrogen sulphide from the metabolism of sulphate which results in sufficient ferric sulphide formatio in sand strata to reduce flow rates of styrene inhibits ferric sulphide by vibrio desulfuricans at concentration of 50 or Example Microbial development in fuel oil systems sludge formation in the aqueous phase at bottom tanks has been of concern to the petroleum Gram negative bacteria in particular have bee held responsible in addition are know as hydrocarbon bacteria leading to hydrocarbon The prevention of the development of aeruginosa in two phase system was demonstrated by incorporating compound II in the Serial dilutions of the oil were then made to give descending concentrations of the compound in Aliquots of containing the were then added to 20 ml medium 5 Samples were inoculated with drop of a 000 distilled water dilution of a 24 hour broth culture of Observations were made at the end of 20 days incubation at by streaking the aqueous phase onto the surface of Glucose Extract Agar plates containing zoiium All controls yielded isolation of the test or No samples containing compound II permitted survival of the The range of concentration tested was from to in the insufficientOCRQuality
Claims (3)
1. ·■ A composition of matter resistant to spoilage by the action of bacteria, fungi and algae, which comprises a water-containing metabolizable composition which is an oil/water system, process water used in pulp and paper manufacture> or flood water used in secondary oil recovery methods and from 0.0001 to 0.05$ by weight of β-bromo-p-nitroetyrene·
2. A composition as claimed In Claim 1 , wherein the oil/water system is a cutting oil or fuel oil,
3. * A composition as claimed in Claim 1 or 2 substantially as described with reference to. any of the Examples. 4· The process of combatting spoilage of an aqueous meta bolizable composition which is an oil/water system, process water used in pulp or paper manufacture, or flood water used in secondary oil recovery methods , which comprises incorporating in such composition from 0·0001 to 0.Q5# by weight of β-bromo-β-nitrostyrene. 5* A process as claimed in Claim 4, wherein the oil/wate system is a cutting oil or fuel oil. 6- A process as claimed in Claim 4 or 5» substantially as described with reference t PARTNERS PC;MZ
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57384566A | 1966-08-22 | 1966-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IL28438A true IL28438A (en) | 1971-10-20 |
Family
ID=24293621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL28438A IL28438A (en) | 1966-08-22 | 1967-08-02 | Process and composition for preserving aqueous systems |
Country Status (12)
| Country | Link |
|---|---|
| BE (1) | BE702570A (en) |
| BR (1) | BR6752159D0 (en) |
| CA (1) | CA933091A (en) |
| CH (1) | CH491823A (en) |
| DE (1) | DE1642038C3 (en) |
| DK (1) | DK126304B (en) |
| ES (1) | ES344293A1 (en) |
| GB (1) | GB1195709A (en) |
| IL (1) | IL28438A (en) |
| IT (1) | IT1044755B (en) |
| NL (1) | NL6711499A (en) |
| SE (1) | SE333040B (en) |
-
1967
- 1967-08-02 CA CA996903A patent/CA933091A/en not_active Expired
- 1967-08-02 IL IL28438A patent/IL28438A/en unknown
- 1967-08-03 CH CH1098367A patent/CH491823A/en not_active IP Right Cessation
- 1967-08-08 GB GB36352/67A patent/GB1195709A/en not_active Expired
- 1967-08-11 BE BE702570D patent/BE702570A/xx not_active IP Right Cessation
- 1967-08-17 BR BR152159/67A patent/BR6752159D0/en unknown
- 1967-08-18 DE DE1642038A patent/DE1642038C3/en not_active Expired
- 1967-08-21 ES ES344293A patent/ES344293A1/en not_active Expired
- 1967-08-21 NL NL6711499A patent/NL6711499A/xx unknown
- 1967-08-22 DK DK424167AA patent/DK126304B/en not_active IP Right Cessation
- 1967-08-22 IT IT19691/67A patent/IT1044755B/en active
- 1967-08-22 SE SE11741/67A patent/SE333040B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1642038A1 (en) | 1971-04-22 |
| SE333040B (en) | 1971-03-01 |
| GB1195709A (en) | 1970-06-24 |
| BE702570A (en) | 1968-02-12 |
| NL6711499A (en) | 1968-02-23 |
| DE1642038B2 (en) | 1979-01-04 |
| DE1642038C3 (en) | 1979-08-30 |
| ES344293A1 (en) | 1968-10-01 |
| CH491823A (en) | 1970-06-15 |
| IT1044755B (en) | 1980-04-21 |
| BR6752159D0 (en) | 1973-09-18 |
| CA933091A (en) | 1973-09-04 |
| DK126304B (en) | 1973-07-02 |
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