US2563044A - Concurrent manufacture of sodium cyanate and fatty alcohols - Google Patents
Concurrent manufacture of sodium cyanate and fatty alcohols Download PDFInfo
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- US2563044A US2563044A US153480A US15348050A US2563044A US 2563044 A US2563044 A US 2563044A US 153480 A US153480 A US 153480A US 15348050 A US15348050 A US 15348050A US 2563044 A US2563044 A US 2563044A
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- Prior art keywords
- sodium
- alcohol
- weight
- parts
- fatty
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- ZVCDLGYNFYZZOK-UHFFFAOYSA-M sodium cyanate Chemical compound [Na]OC#N ZVCDLGYNFYZZOK-UHFFFAOYSA-M 0.000 title claims description 58
- 150000002191 fatty alcohols Chemical class 0.000 title claims description 48
- 238000004519 manufacturing process Methods 0.000 title description 23
- 239000011734 sodium Substances 0.000 claims description 80
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 79
- 229910052708 sodium Inorganic materials 0.000 claims description 79
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 61
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 60
- 238000000034 method Methods 0.000 claims description 38
- 239000004202 carbamide Substances 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 31
- 235000011187 glycerol Nutrition 0.000 claims description 30
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 20
- 239000003921 oil Substances 0.000 claims description 14
- 239000011541 reaction mixture Substances 0.000 claims description 12
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 11
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 239000003925 fat Substances 0.000 claims description 10
- 239000011369 resultant mixture Substances 0.000 claims description 3
- NOJNFULGOQGBKB-UHFFFAOYSA-M sodium;3-[3-tert-butylsulfanyl-1-[[4-(6-ethoxypyridin-3-yl)phenyl]methyl]-5-[(5-methylpyridin-2-yl)methoxy]indol-2-yl]-2,2-dimethylpropanoate Chemical compound [Na+].C1=NC(OCC)=CC=C1C(C=C1)=CC=C1CN1C2=CC=C(OCC=3N=CC(C)=CC=3)C=C2C(SC(C)(C)C)=C1CC(C)(C)C([O-])=O NOJNFULGOQGBKB-UHFFFAOYSA-M 0.000 claims 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 32
- 235000013877 carbamide Nutrition 0.000 description 32
- 150000001298 alcohols Chemical class 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 24
- 150000002148 esters Chemical class 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 15
- 239000008096 xylene Substances 0.000 description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 235000019198 oils Nutrition 0.000 description 12
- 230000009467 reduction Effects 0.000 description 12
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 10
- 238000010992 reflux Methods 0.000 description 10
- 235000014113 dietary fatty acids Nutrition 0.000 description 9
- 235000019197 fats Nutrition 0.000 description 9
- 229930195729 fatty acid Natural products 0.000 description 9
- 239000000194 fatty acid Substances 0.000 description 9
- 239000000344 soap Substances 0.000 description 9
- 150000004665 fatty acids Chemical class 0.000 description 8
- 150000002194 fatty esters Chemical class 0.000 description 8
- 159000000000 sodium salts Chemical class 0.000 description 8
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 7
- 239000000706 filtrate Substances 0.000 description 7
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 6
- -1 fatty acid esters Chemical class 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 150000003626 triacylglycerols Chemical class 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 4
- 239000003085 diluting agent Substances 0.000 description 4
- ALSTYHKOOCGGFT-KTKRTIGZSA-N (9Z)-octadecen-1-ol Chemical compound CCCCCCCC\C=C/CCCCCCCCO ALSTYHKOOCGGFT-KTKRTIGZSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 239000003518 caustics Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical compound CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229940055577 oleyl alcohol Drugs 0.000 description 3
- XMLQWXUVTXCDDL-UHFFFAOYSA-N oleyl alcohol Natural products CCCCCCC=CCCCCCCCCCCO XMLQWXUVTXCDDL-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 150000003388 sodium compounds Chemical class 0.000 description 3
- LIXWSNVLHFNXAJ-UHFFFAOYSA-N sodium;oxidoazaniumylidynemethane Chemical compound [Na+].[O-][N+]#[C-] LIXWSNVLHFNXAJ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 235000015278 beef Nutrition 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- NOPFSRXAKWQILS-UHFFFAOYSA-N docosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCO NOPFSRXAKWQILS-UHFFFAOYSA-N 0.000 description 2
- QYDYPVFESGNLHU-UHFFFAOYSA-N elaidic acid methyl ester Natural products CCCCCCCCC=CCCCCCCCC(=O)OC QYDYPVFESGNLHU-UHFFFAOYSA-N 0.000 description 2
- MVLVMROFTAUDAG-UHFFFAOYSA-N ethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC MVLVMROFTAUDAG-UHFFFAOYSA-N 0.000 description 2
- 235000021588 free fatty acids Nutrition 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- QSQLTHHMFHEFIY-UHFFFAOYSA-N methyl behenate Chemical compound CCCCCCCCCCCCCCCCCCCCCC(=O)OC QSQLTHHMFHEFIY-UHFFFAOYSA-N 0.000 description 2
- QYDYPVFESGNLHU-KHPPLWFESA-N methyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC QYDYPVFESGNLHU-KHPPLWFESA-N 0.000 description 2
- 229940073769 methyl oleate Drugs 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 239000003760 tallow Substances 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- SQSPRWMERUQXNE-UHFFFAOYSA-N Guanylurea Chemical compound NC(=N)NC(N)=O SQSPRWMERUQXNE-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BSSGROOCGJWOIR-UHFFFAOYSA-N [C-]#N.N#CO Chemical compound [C-]#N.N#CO BSSGROOCGJWOIR-UHFFFAOYSA-N 0.000 description 1
- DLOUKJZAAAKORG-UHFFFAOYSA-K [Na+].[Na+].[Na+].OCC(O)C([O-])=O.OCC(O)C([O-])=O.OCC(O)C([O-])=O Chemical compound [Na+].[Na+].[Na+].OCC(O)C([O-])=O.OCC(O)C([O-])=O.OCC(O)C([O-])=O DLOUKJZAAAKORG-UHFFFAOYSA-K 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- MASBWURJQFFLOO-UHFFFAOYSA-N ammeline Chemical compound NC1=NC(N)=NC(O)=N1 MASBWURJQFFLOO-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000332 continued effect Effects 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 239000002837 defoliant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229960000735 docosanol Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 239000003701 inert diluent Substances 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000002545 isoxazoles Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003219 pyrazolines Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- DUIOPKIIICUYRZ-UHFFFAOYSA-N semicarbazide Chemical compound NNC(N)=O DUIOPKIIICUYRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- YZHUMGUJCQRKBT-UHFFFAOYSA-M sodium chlorate Chemical compound [Na+].[O-]Cl(=O)=O YZHUMGUJCQRKBT-UHFFFAOYSA-M 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003509 tertiary alcohols Chemical class 0.000 description 1
- 230000036967 uncompetitive effect Effects 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
- C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
- C07C29/147—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/20—Thiocyanic acid; Salts thereof
Definitions
- This invention relates to a method of utilizing metallic sodium for the concurrent manufacture of sodium cyanate (or sodium cyanide, whichever is the more valuable commercially) and fatty alcohols without consumption of metallic sodium over and above that requisite for the production of either product alone by usual methods.
- sodium cyanide is manufactured by reacting metallic sodium, ammonia and carbon at a relatively elevated temperature.
- this cyanide is converted into sodium cyanate suitable for some specialized industrial uses, but traces of the highly poisonous cyanide are apt to be present, which disqualifies the product for many purposes, and further, the total cost of the product precludes its utilization for many purposes for which it is chemically suited.
- Fatty alcohols are at present produced in large commercial quantities by reduction of fatty acid esters and triglycerides with metallic sodium, with attendant degradation of the sodium to caustic soda.
- the present process may be regarded alternatively as a method of producing fatty alcohols without consumption of metallic sodium additional to that normally required for the manufacture of sodium compounds of the cyanate-cyanide type or as a method of manufacturing these sodium salts without using any more sodium than that required for the conven tional fatty alcohol process.
- this invention is predicated on the discovery and determination that the reacting power, propensity and utility of a given quota of metallic sodium may be twice employed in a single process to do the work and produce the products which now require double the consumption of metallic sodium.
- the present process produces first, a very pure sodium cyanate, which is devoid of even traces of the poisonous sodium cyanide, but which may be reduced, if desired, to the cyanide if the economic value of the latter is deemed greater than that of the sodium cyanate. While the cyanate, at present, is higher priced than the cyanide, this process produces sodium cyanate at a cost inherently below that of sodium cyanide. Actually, the value of the fatty alcohols which are concurrently produced permits further processing cf the sodium cyanate to sodium cyanide without a total cost which renders the cyanide so produced uncompetitive with cyanide now on the market. In short, the process of the present invention produces two valuable commercial commodities virtually at the price of either, regard- 2 less of the apportionment matter of bookkeeping.
- the process constitutes specific improvements in the method of producing fatty alcohols, in that the present sodium process of producing fatty alcohols inherently creates large quantities of caustic glycerine water which are of very limited industrial utility and value.
- the separation of caustic and glycerine water is very difficult.
- the only significant use for this solution is in the manufacture of soaps which of their values as a are essentially competitive with the chief outlet.
- these caustic glycerine water byproducts can be used only to manufacture fatty acid soaps by the soap kettle method which results in the production of four molecules of fatty acid soap for each molecule of fatty alcohol produced. Since fatty alcohols are usually sulfated for detergent use and so modified compete with fatty acid soaps, the normal production of fatty alcohols by sodium reduction is economically inflexible.
- the method of this invention avoids the production of a competitive by-product and in fact results in end products of approximately equal stature.
- the process of the present invention provides conspicuous advantages, the most dramatic of which is that a single atom of sodium is sequentially utilized to do the work which requires two atoms of sodium according to the methods precedent to this invention. Since metallic sodium is an expensive product which is particularly difficult to store, ship and handle without deterioration, the economic benefits of the present invention are substantial.
- this invention comprises reacting metallic sodium with esters in the presence of reducing alcohol to produce sodium alcoholates, then reacting the sodium alcoholates with urea to produce alcohols and sodium cy-' anate.
- the sodium cyanate may be reduced to sodium cyanide without elevating the cost of the cyanide to uneconomic proportions if the market value of the fatty alcohols be properly reflected in the accounting.
- the fatty esters employed in this process may be any of the animal and vegetable fats, oils and waxes which are produced by nature. Synthetic esters of the same type of structural formula may be used such as methyl oleate, ethyl stearate,
- esters may be described as the reaction products of the higher aliphatic carboxylic acids with monohydric or polyhydric alcohols.
- an individual fatty acid may be esteritied and used in this process if it is desirable to produce the corresponding individual fatty alcohol.
- the process involves initially reacting the ester with metallic sodium in the presence of reducing alcohol.
- This consideration also applies to the selection of the neutral diluent which is usually employed for protecting the sodium from the atmosphere during its introduction into the reaction and/or for thinning the viscosity of the reaction mixture.
- the alcohols are high boiling secondary alcohols such as sec-butyl alcohol, methyl butyl carbinol (methyl amyl alcohol), cyclohexanol (hexalin), etc., or such tertiary alcohols as tertbutyl and tert-amyl, and while the diluent may be the conventional toluene, I prefer to use the higher boiling point xylene.
- the sodium reduction is often carried out in an atmosphere of nitrogen.
- one molecule of the fatty tri-glyceride and six molecules of reducing alcohol are reacted with twelve atoms of sodium to produce three molecules of a sodium alcoholate of fatty alcohol, one molecule'of tri-sodium glycerate and six molecules of a sodium alcoholate of the reducing alcohol.
- a thinner or diluent of neutral type which does not enter into the reaction is usually employed and if desired an excess of reducing alcohol may be added to further thin the mixture after the reaction is completed.
- the inert diluent may be removed after the reduction is completed.
- the reaction mixture is heated with urea at a temperature of from 110 to 200 0., preferably above the melting point of urea, which is 133 C.
- urea a temperature of from 110 to 200 0., preferably above the melting point of urea, which is 133 C.
- the reaction initiates and proceeds even if no excess of alcohol is present to bring the urea into solution; that is, the urea may be reacted directly with the alcoholates resulting from a stoichiometrical mixture of the original reactants.
- the addition of urea results in the elimination of such particles and in the avoidance of dangers involved in the handling of solutions containing metallic sodium.
- This urea reaction produces sodium cyanate, which precipitates from the mixture; alcohols, including fatty alcohols and glycerine; and ammonia gas, which is drawn from the reaction chamber.
- this reaction is conducted under reflux conditions to prevent loss of alcohol and diluent.
- the speed of the urea, sodium alcoholate reaction is a function of temperature.
- the use of higher boiling reducing alcohols and xylene, e. g., permits this reflux to be conducted at efilcient temperatures. If necessary, pressure may be employed to raise the boiling points.
- alcoholates as used in the preceding paragraph and throughout this disclosure, I intend to comprehend the reaction products of metallic sodium with each of the chains of the original ester molecules, 1. e., sodium salts of the lower aliphatic alcohols such as methyl, ethyl, isopropyl and butyl, the sodium compounds formed in such reactions which have organic chain lengths corresponding to those of the higher fatty acids, and the compounds of sodium and polyhydric alcohols such as glycol and glycerine, depending upon the identity of the ester employed. Even though no solution of urea is constituted, still the alcoholates react with urea, and the sodium cyanate thus formed in the reaction is precipitated, so that the reaction goes substantially to completion.
- the sodium cyanate is separated from the alcohols after the completion of the reaction by filtration, centrifuging or the like, accompanied by washing of the precipitate with alcohol or other liquid which is solvent for the alcohols of the reaction mixture but not for the sodium cyanate.
- the next step of the process is the separation of the cyanate-free alcohols. If the fatty ester originally treated with the metallic sodium in the presence of the reducing alcohol is a synthetic ester of a fatty acid with a lower molecular weight alcohol then the corresponding alcohol may be topped off with the reducing alcohol by distillation, after which the fatty alcohols are themselves distilled, if desired, to improve their purity. If, on the other hand, natural fats or oils, that is, tri-glycerides are used as the starting material, as is recommended in view of their availability and lower price, the glycerine must be separated from the other alcohols, that is, the fatty alcohols and reducing alcohol. This is done by washing the alcoholic mixture with water.
- the stronger the glycerine water the less further refining it requires. While as much water as desired or convenient may be employed to wash out the glycerine, it is possible to eilect a good separation by the use of an amount of water for washing purposes which does not substantially exceed twice the weight of the glycerine contained in the mixture. Thus, a glycerine water is obtained which is of much higher strength than the glycerine water normally recovered from soap making.
- Sodium cyanate is a versatile reagent in inorganic and organic chemistry. It may be used in the synthesis of cyanuric acid, alkyl ureas, aryl ureas, semicarbazide, N,N-hydrazodicarbonamide, ammeline, guanylurea, substituted pyrazolines, substituted isoxazoles, substituted imidazoles, etc. It has widespread application in agriculture as a selective weed killer and as a defoliant e. g., for cotton. It is used in saltbaths for. the treatment of aluminum and magnesium alloys, in case-hardening of steel and may find use in the extraction of gold and silver from their ores.
- the sodium cyanate may be reduced to sodium cyanide, which at present enjoys a broader market than the sodium cyanate, without bringing the total cost of the sodium cyanide so produced to a figure above the cost of the production of sodium cyanide from metallic sodium by the conventional methods now in use.
- the reduction of sodium cyanate to sodium cyanide may be accomplished as follows;
- Example 1 666 parts by weight of beef tallow and 346 parts by weight of secondary butyl alcohol were dissolved in 600 parts by weight of xylene and added to a stirred suspension of 217 parts by weight of sodium in 860 parts by weight of xylene at 105-110 C. After the reduction was complete, 570 parts by weight of urea was added to the reaction mixture which was then boiled under gentle reflux for four hours with continual agitation. Ammonia was evolved during the reaction. At the conclusion of the reflux period the reaction mixture was cooled to 50-60 C., and the precipitated sodium cyanate was filteredofl.
- the filtrate was then separated into its component constituents of fatty alcohols, sec-butyl alcohol, xylene and glycerine by washing the glycerine out with three 200 parts by weight portions of water and then fractionating the water in- 450' parts by weight of cottonseed oil and 244 parts by weight of tertiary butyl alcohol were dissolved in 1300 parts by weight of toluene and slowly added to a stirred suspension of 152 parts by weight of finely divided sodium and another 1300 parts by weight of toluene at 100-110 C. After the reduction was complete, the toluene was distilled oil from the reaction mixture and was replaced with 2350 parts by weight of tertiary butyl alcohol. 400 parts by weight of urea was added.
- Example 3 666 parts by weight of beef tallow and 477 parts by weight of methyl isobutyl carbinol were dissolved in 600 parts by weightof xylene and added slowly to a stirred suspension of 217 parts by weight of sodium and 860 parts by weight of xylene at 105-110 C. After the reduction was complete 570 parts by weight of urea was added to the reaction mixture which was then boiled to gentle reflux for three hours with continual agitation. At the conclusion of the reflux period the reaction mixture was cooled to 50-60 C., and the separated sodium cyanate was filtered oil; the filtrate was then separated into its components as described in Example 1.
- the yield of fatty alcohol was 552 parts by weight representing a yield of 92.0% of theoretical; the yie of sodium cyanate (assaying 96.0% NaCNO) was 590 parts by weight, equivalent to 92.2% theoretical.
- Example 4 100 parts by weight of methyl oleate together with 73.5 parts by weight of methyl isobutyl carbinol was dissolved in 315 parts by weight of xylene and slowly added to a suspension of 33.1 parts by weight of finely divided molten sodium and another 33.1 parts by weight of xylene maintained at 125-130 C. After all the ester mixture had been added, the reaction was continued for an additional one-half hour when all sodium particles had all substantially disappeared. Urea (86.3 parts by weight) was slowly added at this point, and the reaction continued at gentle reflux for three to four hours, ammonia being evolved with the formation of sodium cyanate by the reaction of urea-with the alcoholates present. The mixture was allowed to cool to -100 C. and the precipitated sodium cyanate was filtered off, washed with methyl lsobutyl carbinol and dried. Solvent was removed from the filtrate by distillation and the crude oleyl alcohol remaining was vacuum distilled at 10-15 mm.
- the yield of crude oleyl alcohol was 86.0 parts by weight, of theory, while the yield of pure distilled oleyl alcohol was 75.5 parts by weight, 83.4% of theory; the sodium cyanate assayed 92 pure, weight yield being 91.6 parts by weight, 98% of theory.
- Example 5 Methyl behenate, 300 parts by weight, together with 178.7 parts by weight of methyl isobutyl carbinol were dissolved in 180 parts by weight of xylene and slowly added to 80.7 parts by weight molten and finely divided sodium in another 80.7
- the yield of pure distilled behenyl alcohol was 85.0% of theory (235 parts by weight), the yield of sodium cyanate was 98.5% of theory (224.5 parts by weight) and its purity was 92.7%.
- Example 7 Refined and vacuum dried sperm oil esters, 100 parts by weight, together with42.8 parts'by weight dry methyl iscbutyl carbinol and 125.2 parts by weight of xylene were slowly added to a suspension of 19.3 parts by weight of finely divided molten sodium is approximately 100 parts by weight of xylene, the temperature being maintained at 125-27 C. during the addition. "Reaction was conducted in an atmosphere of nitrogen. After all the ester mix had been added, the reaction was continued for an additional onehalf hour at 125-2'7 C. and all the Na had substantially disappeared. Dry urea (50.3 parts by weight) was slowly added at this point, temperature dropping to 120-22 C.
- thiourea may be employed following the sodium reduction with the resulting precipitate of sodium thio-
- the employment of fats and oils in this process of manufacturing sodium cyanate from metallic sodium and urea yields detergentforming materials, fatty alcohols, which are superior to and more valuable than the corresponding fatty acid soaps and also such use yields glycerine water of much higher strength than that usually obtained as a by-product of soap making, both at a cost not substantially above that of the conventional methods of producing either sodium cyanateor fatty alcohols.
- any specific fatty alcohol may be'prepared in conjunction with the manufacture of sodium cyanate.
- the process for the manufacture of sodium cyanate which comprises treating the reaction mixture obtained by the sodium reduction of fats and oils in the presence of an aliphatic alcohol containing the sodium salt of the aliphatic alcohol, the sodium salt of glycerine and the sodium salt of the fatty alcohol, with urea, whereby ammonia is evolved and sodium cyanate is formed, and separating said formed sodium cyanate from the resultant mixture containing aliphatic alcohol, glycerine and fatty alcohol.
- a method of utilizing sodium for the concurrent manufacture of sodium cyanate and fatty alcohol comprising reacting metallic sodium with fatty ester in the presence of reducing alcohol to produce sodium alcoholates, reacting said resulting sodium alcoholatss with urea to produce alcohols and sodium cyanate, and separating'the alcohols from the sodium cyanate.
- a method of utilizing sodium for the concurrent manufacture of, sodium cyanate and .fatty alcohol comprising reacting metallic sodium with fatty tri-glycerides in the presence of reducing alcohol to produce sodium alcoholates, reacting said resulting sodium al- .coholates with urea to produce alcohols and sodium-cyanate and separating the alcohols from the sodium cyanate.
- the method of producing sodium cyanate and fatty alcohol concurrently which comprises treating a mixture of reducing alcohol and fatty ester with metallic sodium to produce a mixture of sodium alcoholates, treating said mixture of sodium alcoholates with urea to produce sodium cyanate and alcohols, including the alcohol corresponding to the fatty component of the ester, .separating the sodium cyanate from the alcohols and separating thealcohols one from the others.
- the method of producing sodium cyanate and fatty alcohol jointly from fatty tri-glycerides, urea and metallic sodium comprising treating a mixture of fatty tri-glycerides and reducing alcohol with metallic sodium to produce a mixture of sodium alcoholates, reacting. said mixtureof sodium alcoholates with urea to produce sodium cyanate, glycerine and alcohols, including the alcohol corresponding to the fatty component of the tri-glyceride, separating the sodium cyanate from the alcoholsand glycerine and washing the mixture of alcohols and glycerine with water to remove the glycerine from the fatty alcohols.
- the concurrent manufacture of sodium cy- .'anate and fatty alcohol which comprises reacting metallic sodium with fatty ester in the presence of reducing alcohol to produce sodium alcoholates, reacting said mixture of sodium alcoholates with urea at a temperature of -200 C. to produce sodium cyanate and alcohols, in- .cluding the alcohol corresponding to the fatty component of the ester, separating the sodium cyanate from the alcohols, and separating the fatty alcohol from the remaining alcohols.
- the method of concurrently producing sodiurn cyanate and fatty alcohol which comprises treating a mixture or reducing alcohol and fatty ester with metallic sodium to produce a mixture of sodium alcoholates, reacting said mixture of sodium alcoholates with urea at a temperature above that of the melting point of urea to produce sodium cyanate and alcohols, including the alcohol corresponding to the fatty component the ester, separating the sodium cyanate from the alcohols and effecting the separation of the alcohols into two or more fractions.
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Description
Patented Aug. 7, 1951 CONCURRENT MANUFACTURE OF SODIUM I CYANATE AND FATTY ALCOHOLS Jonas Kamlet, New York, N. Y., assignor to Emery Industries, Inc., Cincinnati, Ohio, a corporation of Ohio No Drawing. Application April 1, 1950, Serial No. 153,480
9 Claims.
This invention relates to a method of utilizing metallic sodium for the concurrent manufacture of sodium cyanate (or sodium cyanide, whichever is the more valuable commercially) and fatty alcohols without consumption of metallic sodium over and above that requisite for the production of either product alone by usual methods. At the present time, sodium cyanide is manufactured by reacting metallic sodium, ammonia and carbon at a relatively elevated temperature. As a separate operation, some of this cyanide is converted into sodium cyanate suitable for some specialized industrial uses, but traces of the highly poisonous cyanide are apt to be present, which disqualifies the product for many purposes, and further, the total cost of the product precludes its utilization for many purposes for which it is chemically suited. Fatty alcohols are at present produced in large commercial quantities by reduction of fatty acid esters and triglycerides with metallic sodium, with attendant degradation of the sodium to caustic soda. The present process may be regarded alternatively as a method of producing fatty alcohols without consumption of metallic sodium additional to that normally required for the manufacture of sodium compounds of the cyanate-cyanide type or as a method of manufacturing these sodium salts without using any more sodium than that required for the conven tional fatty alcohol process.
Regarded from either point of view, this invention is predicated on the discovery and determination that the reacting power, propensity and utility of a given quota of metallic sodium may be twice employed in a single process to do the work and produce the products which now require double the consumption of metallic sodium.
The present process produces first, a very pure sodium cyanate, which is devoid of even traces of the poisonous sodium cyanide, but which may be reduced, if desired, to the cyanide if the economic value of the latter is deemed greater than that of the sodium cyanate. While the cyanate, at present, is higher priced than the cyanide, this process produces sodium cyanate at a cost inherently below that of sodium cyanide. Actually, the value of the fatty alcohols which are concurrently produced permits further processing cf the sodium cyanate to sodium cyanide without a total cost which renders the cyanide so produced uncompetitive with cyanide now on the market. In short, the process of the present invention produces two valuable commercial commodities virtually at the price of either, regard- 2 less of the apportionment matter of bookkeeping.
Apart from the advantage of the present process in the production of the specified sodium compounds, the process constitutes specific improvements in the method of producing fatty alcohols, in that the present sodium process of producing fatty alcohols inherently creates large quantities of caustic glycerine water which are of very limited industrial utility and value. The separation of caustic and glycerine water is very difficult. In fact the only significant use for this solution is in the manufacture of soaps which of their values as a are essentially competitive with the chief outlet.
for fatty alcohols, the detergent industry.
That is, these caustic glycerine water byproducts can be used only to manufacture fatty acid soaps by the soap kettle method which results in the production of four molecules of fatty acid soap for each molecule of fatty alcohol produced. Since fatty alcohols are usually sulfated for detergent use and so modified compete with fatty acid soaps, the normal production of fatty alcohols by sodium reduction is economically inflexible. The method of this invention avoids the production of a competitive by-product and in fact results in end products of approximately equal stature.
Thus, viewed from the point of production of fatty alcohols or sodium cyanate or cyanide, the process of the present invention provides conspicuous advantages, the most dramatic of which is that a single atom of sodium is sequentially utilized to do the work which requires two atoms of sodium according to the methods precedent to this invention. Since metallic sodium is an expensive product which is particularly difficult to store, ship and handle without deterioration, the economic benefits of the present invention are substantial.
In its broadest terms, this invention comprises reacting metallic sodium with esters in the presence of reducing alcohol to produce sodium alcoholates, then reacting the sodium alcoholates with urea to produce alcohols and sodium cy-' anate. If desired, the sodium cyanate may be reduced to sodium cyanide without elevating the cost of the cyanide to uneconomic proportions if the market value of the fatty alcohols be properly reflected in the accounting.
The fatty esters employed in this process may be any of the animal and vegetable fats, oils and waxes which are produced by nature. Synthetic esters of the same type of structural formula may be used such as methyl oleate, ethyl stearate,
3 butyl iaurate, etc. Such esters may be described as the reaction products of the higher aliphatic carboxylic acids with monohydric or polyhydric alcohols.
In general, it is believed to be desirable to use commercial fats and oils as the source of the fatty esters, but ester type waxes may also be used. Such fats and oils, however, must be very low in free fatty acid content to avoid wastage of expensive metallic sodium by the production of sodium soaps. If it is desired to use a cheaper grade of fat or oil, which is characterized by substantial free fatty acid content, then the fat or oil may be esterified, for instance with a monohydric alcohol, to produce a synthetic ester. Also, since techniques for segregating various discrete individual fatty acids are well-known, whereas corresponding techniques for segregating the corresponding alcohols have not yet been developed, an individual fatty acid may be esteritied and used in this process if it is desirable to produce the corresponding individual fatty alcohol.
The process involves initially reacting the ester with metallic sodium in the presence of reducing alcohol. This need be no difierent from the first step of the conventional process of manufacturing fatty alcohols by sodium reduction, but from the point of view of succeeding operations, it is desirable that the reducing alcohol be chosen in relation to its boiling point to provide a relatively high boiling point for the mixture resulting from the sodium reaction. That is, even though the reactivity of the reducing alcohol is an important factor, some activity may be sacrificed with a. view to promoting theurea reaction. This consideration also applies to the selection of the neutral diluent which is usually employed for protecting the sodium from the atmosphere during its introduction into the reaction and/or for thinning the viscosity of the reaction mixture. Preferably, the alcohols are high boiling secondary alcohols such as sec-butyl alcohol, methyl butyl carbinol (methyl amyl alcohol), cyclohexanol (hexalin), etc., or such tertiary alcohols as tertbutyl and tert-amyl, and while the diluent may be the conventional toluene, I prefer to use the higher boiling point xylene. As in Example 7, the sodium reduction is often carried out in an atmosphere of nitrogen.
In the first step of the process, utilizing natural fats as the ester, one molecule of the fatty tri-glyceride and six molecules of reducing alcohol are reacted with twelve atoms of sodium to produce three molecules of a sodium alcoholate of fatty alcohol, one molecule'of tri-sodium glycerate and six molecules of a sodium alcoholate of the reducing alcohol. As indicated, a thinner or diluent of neutral type which does not enter into the reaction is usually employed and if desired an excess of reducing alcohol may be added to further thin the mixture after the reaction is completed. Or, as indicated in Example 2, the inert diluent may be removed after the reduction is completed.
As a second step the reaction mixture is heated with urea at a temperature of from 110 to 200 0., preferably above the melting point of urea, which is 133 C. I have found that the reaction initiates and proceeds even if no excess of alcohol is present to bring the urea into solution; that is, the urea may be reacted directly with the alcoholates resulting from a stoichiometrical mixture of the original reactants. I have further found that, if any unreacted particles of sodium should remain in the reaction vessel, the addition of urea results in the elimination of such particles and in the avoidance of dangers involved in the handling of solutions containing metallic sodium. This urea reaction produces sodium cyanate, which precipitates from the mixture; alcohols, including fatty alcohols and glycerine; and ammonia gas, which is drawn from the reaction chamber. Preferably this reaction is conducted under reflux conditions to prevent loss of alcohol and diluent. I have found that the speed of the urea, sodium alcoholate reaction is a function of temperature. Thus, the use of higher boiling reducing alcohols and xylene, e. g., permits this reflux to be conducted at efilcient temperatures. If necessary, pressure may be employed to raise the boiling points.
By the term alcoholates as used in the preceding paragraph and throughout this disclosure, I intend to comprehend the reaction products of metallic sodium with each of the chains of the original ester molecules, 1. e., sodium salts of the lower aliphatic alcohols such as methyl, ethyl, isopropyl and butyl, the sodium compounds formed in such reactions which have organic chain lengths corresponding to those of the higher fatty acids, and the compounds of sodium and polyhydric alcohols such as glycol and glycerine, depending upon the identity of the ester employed. Even though no solution of urea is constituted, still the alcoholates react with urea, and the sodium cyanate thus formed in the reaction is precipitated, so that the reaction goes substantially to completion.
The sodium cyanate is separated from the alcohols after the completion of the reaction by filtration, centrifuging or the like, accompanied by washing of the precipitate with alcohol or other liquid which is solvent for the alcohols of the reaction mixture but not for the sodium cyanate.
The next step of the process is the separation of the cyanate-free alcohols. If the fatty ester originally treated with the metallic sodium in the presence of the reducing alcohol is a synthetic ester of a fatty acid with a lower molecular weight alcohol then the corresponding alcohol may be topped off with the reducing alcohol by distillation, after which the fatty alcohols are themselves distilled, if desired, to improve their purity. If, on the other hand, natural fats or oils, that is, tri-glycerides are used as the starting material, as is recommended in view of their availability and lower price, the glycerine must be separated from the other alcohols, that is, the fatty alcohols and reducing alcohol. This is done by washing the alcoholic mixture with water. Naturally, the stronger the glycerine water, the less further refining it requires. While as much water as desired or convenient may be employed to wash out the glycerine, it is possible to eilect a good separation by the use of an amount of water for washing purposes which does not substantially exceed twice the weight of the glycerine contained in the mixture. Thus, a glycerine water is obtained which is of much higher strength than the glycerine water normally recovered from soap making.
Sodium cyanate is a versatile reagent in inorganic and organic chemistry. It may be used in the synthesis of cyanuric acid, alkyl ureas, aryl ureas, semicarbazide, N,N-hydrazodicarbonamide, ammeline, guanylurea, substituted pyrazolines, substituted isoxazoles, substituted imidazoles, etc. It has widespread application in agriculture as a selective weed killer and as a defoliant e. g., for cotton. It is used in saltbaths for. the treatment of aluminum and magnesium alloys, in case-hardening of steel and may find use in the extraction of gold and silver from their ores. In view of the substantial value of fatty alcohols and glycerine, however, the sodium cyanate, if desired, may be reduced to sodium cyanide, which at present enjoys a broader market than the sodium cyanate, without bringing the total cost of the sodium cyanide so produced to a figure above the cost of the production of sodium cyanide from metallic sodium by the conventional methods now in use. The reduction of sodium cyanate to sodium cyanide may be accomplished as follows;
NaCNO+CO- NaCN+COz Example 1 666 parts by weight of beef tallow and 346 parts by weight of secondary butyl alcohol were dissolved in 600 parts by weight of xylene and added to a stirred suspension of 217 parts by weight of sodium in 860 parts by weight of xylene at 105-110 C. After the reduction was complete, 570 parts by weight of urea was added to the reaction mixture which was then boiled under gentle reflux for four hours with continual agitation. Ammonia was evolved during the reaction. At the conclusion of the reflux period the reaction mixture was cooled to 50-60 C., and the precipitated sodium cyanate was filteredofl. The filtrate was then separated into its component constituents of fatty alcohols, sec-butyl alcohol, xylene and glycerine by washing the glycerine out with three 200 parts by weight portions of water and then fractionating the water in- 450' parts by weight of cottonseed oil and 244 parts by weight of tertiary butyl alcohol were dissolved in 1300 parts by weight of toluene and slowly added to a stirred suspension of 152 parts by weight of finely divided sodium and another 1300 parts by weight of toluene at 100-110 C. After the reduction was complete, the toluene was distilled oil from the reaction mixture and was replaced with 2350 parts by weight of tertiary butyl alcohol. 400 parts by weight of urea was added. Then the reaction mixture was boiled under gentle reflux for three hours until the ammonia evolution ceased, the mixture was cooled somewhat, the precipitate of sodium cyanate was filtered oil and the components of the filtrate were separated as described in Example 1. The yield of fatty alcohols was 322.5 parts by weight, equivalent to 85.2% of theoretical; the yield-of sodium cyanate (assaying 96.2% NaCNO) was 395 parts by weight, equivalent to 88.2% of theoretical.
Example 3 666 parts by weight of beef tallow and 477 parts by weight of methyl isobutyl carbinol were dissolved in 600 parts by weightof xylene and added slowly to a stirred suspension of 217 parts by weight of sodium and 860 parts by weight of xylene at 105-110 C. After the reduction was complete 570 parts by weight of urea was added to the reaction mixture which was then boiled to gentle reflux for three hours with continual agitation. At the conclusion of the reflux period the reaction mixture was cooled to 50-60 C., and the separated sodium cyanate was filtered oil; the filtrate was then separated into its components as described in Example 1.
The yield of fatty alcohol was 552 parts by weight representing a yield of 92.0% of theoretical; the yie of sodium cyanate (assaying 96.0% NaCNO) was 590 parts by weight, equivalent to 92.2% theoretical.
Example 4 100 parts by weight of methyl oleate together with 73.5 parts by weight of methyl isobutyl carbinol was dissolved in 315 parts by weight of xylene and slowly added to a suspension of 33.1 parts by weight of finely divided molten sodium and another 33.1 parts by weight of xylene maintained at 125-130 C. After all the ester mixture had been added, the reaction was continued for an additional one-half hour when all sodium particles had all substantially disappeared. Urea (86.3 parts by weight) was slowly added at this point, and the reaction continued at gentle reflux for three to four hours, ammonia being evolved with the formation of sodium cyanate by the reaction of urea-with the alcoholates present. The mixture was allowed to cool to -100 C. and the precipitated sodium cyanate was filtered off, washed with methyl lsobutyl carbinol and dried. Solvent was removed from the filtrate by distillation and the crude oleyl alcohol remaining was vacuum distilled at 10-15 mm.
The yield of crude oleyl alcohol was 86.0 parts by weight, of theory, while the yield of pure distilled oleyl alcohol was 75.5 parts by weight, 83.4% of theory; the sodium cyanate assayed 92 pure, weight yield being 91.6 parts by weight, 98% of theory.
Example 5 Methyl behenate, 300 parts by weight, together with 178.7 parts by weight of methyl isobutyl carbinol were dissolved in 180 parts by weight of xylene and slowly added to 80.7 parts by weight molten and finely divided sodium in another 80.7
parts by weight xylene maintained at 125-l30 C.
The reaction was continued an additional onehalf hour after all the ester had been added, the sodium then being substantially all used up. Urea, 210.0 parts by weight, was then added slowly and refluxed from threeto four hours with the evolution of ammonia and the formation of a precipitate of sodium cyanate. The mixture was cooled slightly to 100-110 C. and the sodium cyanate was filtered ofi, washed and dried. Solvent was removed from the filtrate by distillation and the crude fatty alcohol was dis tilled at 10-l5 mm. vacuum.
The yield of pure distilled behenyl alcohol was 85.0% of theory (235 parts by weight), the yield of sodium cyanate was 98.5% of theory (224.5 parts by weight) and its purity was 92.7%.
Example 6.
Coconut oil, 100 parts by weight, and methyl isobutyl carbinol, 98 parts by weight, were dis solved in 98 parts by weight of xylene and slowly added to a suspension of 44.1 parts by weight of cyanate.
, sodium'in 4451' parts by weight of xylene, the
temperature being held at approximately 130 C. An additional one-half hour reaction time then was used, after completion ofthe addition ofthe coconut oil. Urea (115.0 parts by weight) was added to the reaction flask and the mixture was refluxed for four hours, ammonia being evolved and sodium cyanate was filtered off, washed with methyl isobutyl carbinol and dried. The filtrate was added to hot watergiving a separation into an upper layer of solvents and fatty alcohol and a lower layer of water and glycerine. The solvents were removed from the upper layer by distillation and the crude fatty alcohol remaining was vacuum distilled at -15 mm. The glycerine water layer was concentrated by evaporation of the water.
The yield'of crude alcohol was 86.9 parts by weight or 98.8% of theory with a yield' of 74.3
parts by weight of pure distilled alcohol, 84.5% of theory; the yield of glycerine was 11.6 parts by weight or 88% of theory; the weight yield of sodium cyanate (116 parts by weight) was 94% of theory and its purity was 93.5%. g
Example 7 Refined and vacuum dried sperm oil esters, 100 parts by weight, together with42.8 parts'by weight dry methyl iscbutyl carbinol and 125.2 parts by weight of xylene were slowly added to a suspension of 19.3 parts by weight of finely divided molten sodium is approximately 100 parts by weight of xylene, the temperature being maintained at 125-27 C. during the addition. "Reaction was conducted in an atmosphere of nitrogen. After all the ester mix had been added, the reaction was continued for an additional onehalf hour at 125-2'7 C. and all the Na had substantially disappeared. Dry urea (50.3 parts by weight) was slowly added at this point, temperature dropping to 120-22 C. Reaction was con tinued at reflux for four and one-half hours, temperature rising gradually to 140 C., ammonia being evolved. and sodium cyanate formed. Mixture was then cooled to 110-20 C. and the insolublesodium cyanate filtered off, washed with methyl isobutyl carbinol, and dried. Solvent was removed from the filtrate by distillation and the crude alcohol remaining vacuum distilled at 10-15 mm. Yield of crude alcohol (97.8 parts by weight) was 97.3% of theory. Yield of distilled pure alcohol was 85.8 parts by weight or 85.3% of theory. Weight yield of sodium cyanate was 52 parts by weight or 95.7%, purity (after slight further washing) being 95%.
As analternative to the use of urea, thiourea may be employed following the sodium reduction with the resulting precipitate of sodium thio- From the foregoing description, it is to be observed that the employment of fats and oils in this process of manufacturing sodium cyanate from metallic sodium and urea yields detergentforming materials, fatty alcohols, which are superior to and more valuable than the corresponding fatty acid soaps and also such use yields glycerine water of much higher strength than that usually obtained as a by-product of soap making, both at a cost not substantially above that of the conventional methods of producing either sodium cyanateor fatty alcohols. By employing the appropriate ester, any specific fatty alcohol may be'prepared in conjunction with the manufacture of sodium cyanate.
Having described my invention, I claimi .1. A process'for; the treatment of the reaction mixture obtained by the sodium reduction of fats and oils in the presence of an aliphatic alcohol; said mixture containing the sodium salt of the aliphatic alcohol, the sodium salt of glycerine and the sodium salt of the fatty alcohol; which comprises reacting said mixture with urea whereby ammonia is evolved and sodium cyanate is formed, separating said formed sodium cyanate from the'resultant mixture containin aliphatic alcohol, glycerine and fatty alcohol, and fractionating the latter mixture to recover the aliphatic alcohol, the glycerine and the fatty alcohol.
2. The process for the manufacture of sodium cyanate which comprises treating the reaction mixture obtained by the sodium reduction of fats and oils in the presence of an aliphatic alcohol containing the sodium salt of the aliphatic alcohol, the sodium salt of glycerine and the sodium salt of the fatty alcohol, with urea, whereby ammonia is evolved and sodium cyanate is formed, and separating said formed sodium cyanate from the resultant mixture containing aliphatic alcohol, glycerine and fatty alcohol.
3. A method of utilizing sodium for the concurrent manufacture of sodium cyanate and fatty alcohol, said method comprising reacting metallic sodium with fatty ester in the presence of reducing alcohol to produce sodium alcoholates, reacting said resulting sodium alcoholatss with urea to produce alcohols and sodium cyanate, and separating'the alcohols from the sodium cyanate.
4. A method of utilizing sodium for the concurrent manufacture of, sodium cyanate and .fatty alcohol, said method comprising reacting metallic sodium with fatty tri-glycerides in the presence of reducing alcohol to produce sodium alcoholates, reacting said resulting sodium al- .coholates with urea to produce alcohols and sodium-cyanate and separating the alcohols from the sodium cyanate.
5. The method of producing sodium cyanate and fatty alcohol concurrently which comprises treating a mixture of reducing alcohol and fatty ester with metallic sodium to produce a mixture of sodium alcoholates, treating said mixture of sodium alcoholates with urea to produce sodium cyanate and alcohols, including the alcohol corresponding to the fatty component of the ester, .separating the sodium cyanate from the alcohols and separating thealcohols one from the others.
6. The method of producing sodium cyanate and fatty alcohol jointly from fatty tri-glycerides, urea and metallic sodium, said method comprising treating a mixture of fatty tri-glycerides and reducing alcohol with metallic sodium to produce a mixture of sodium alcoholates, reacting. said mixtureof sodium alcoholates with urea to produce sodium cyanate, glycerine and alcohols, including the alcohol corresponding to the fatty component of the tri-glyceride, separating the sodium cyanate from the alcoholsand glycerine and washing the mixture of alcohols and glycerine with water to remove the glycerine from the fatty alcohols.
7. The concurrent manufacture of sodium cy- .'anate and fatty alcohol, which comprises reacting metallic sodium with fatty ester in the presence of reducing alcohol to produce sodium alcoholates, reacting said mixture of sodium alcoholates with urea at a temperature of -200 C. to produce sodium cyanate and alcohols, in- .cluding the alcohol corresponding to the fatty component of the ester, separating the sodium cyanate from the alcohols, and separating the fatty alcohol from the remaining alcohols.
8. The method of concurrently producing sodiurn cyanate and fatty alcohol which comprises treating a mixture or reducing alcohol and fatty ester with metallic sodium to produce a mixture of sodium alcoholates, reacting said mixture of sodium alcoholates with urea at a temperature above that of the melting point of urea to produce sodium cyanate and alcohols, including the alcohol corresponding to the fatty component the ester, separating the sodium cyanate from the alcohols and effecting the separation of the alcohols into two or more fractions.
9. A method of utilizing sodium for the concurrent manufacture of sodium cyanate and fatty alcohols which comprises reacting metallic sodium dispersed in an inert hydrocarbon with fatty ester in the presence of a reducing second- 10 ary alcohol to produce sodium alcohoiates, react ing the mixture containing said sodium alcoholates with urea at the reflux temperature or the mixture to produce alcohols and sodium cy= anate and separating the alcohols irom the sodl= um cyanate.
JONAS KA.
REFERENCES CITED The following references are of record in the I file of this patent:
UNITED STATES PATENTS
Claims (1)
1. A PROCESS FOR THE TREATMENT OF THE REACTION MIXTURE OBTAINED BY THE SODIUM REDUCTIONS OF FATS AND OILS IN THE PRESENCE OF AN ALIPHATIC ALCOHOL; SAID MIXTURE CONTAINING THE SODIUM SALT OF THE ALIPHATIC ALCOHOL, THE SODIUM SALT OF GLYCERINE AND THE SODIUM SALT OF THE FATTY ALCOHOL; WHICH COMPRISES REACTING SAID MIXTURE WITH UREA WHEREBY AMMONIA IS EVOLVED AND SODIUM CYANATE IS FORMED, SEPARATING SAID FORMED SODIUM CYANATE FROM THE RESULTANT MIXTURE CONTAINING ALIPHATIC ALCOHOL, GLYCERINE AND FATTY ALCOHOL, AND FRACTIONATING THE LATTER MIXTURE TO RECOVER THE ALIPHATIC ALCOHOL, THE GLYCERINE AND THE FATTY ALCOHOL.
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US2612527A (en) * | 1947-06-27 | 1952-09-30 | Anglaret Paul | Method of reduction of esters, etholides, glycerides |
US2729541A (en) * | 1953-03-24 | 1956-01-03 | Ethyl Corp | Preparation of metal cyanates |
US2819318A (en) * | 1953-12-02 | 1958-01-07 | Ethyl Corp | Alcohols derived from babassu oil |
US2865968A (en) * | 1955-05-06 | 1958-12-23 | Nat Distillers Chem Corp | Production of fatty alcohols |
US2889198A (en) * | 1956-10-01 | 1959-06-02 | Emery Industries Inc | Manufacture of cyanates |
US2915564A (en) * | 1955-04-15 | 1959-12-01 | Nat Distillers Chem Corp | Reduction of fatty acid esters to produce alcohols |
US4496529A (en) * | 1984-06-20 | 1985-01-29 | Olin Corporation | Preparation of metal cyanates from alkyl carbamates |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1915425A (en) * | 1929-04-10 | 1933-06-27 | Du Pont | Process for manufacture of cyanates |
DE597956C (en) * | 1929-04-11 | 1934-06-02 | Degussa | Process for the production of cyanate salts |
US2460969A (en) * | 1946-06-28 | 1949-02-08 | Innovations Chimiques Sinnova | Method for producing higher molecular alcohols |
-
1950
- 1950-04-01 US US153480A patent/US2563044A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1915425A (en) * | 1929-04-10 | 1933-06-27 | Du Pont | Process for manufacture of cyanates |
DE597956C (en) * | 1929-04-11 | 1934-06-02 | Degussa | Process for the production of cyanate salts |
US2460969A (en) * | 1946-06-28 | 1949-02-08 | Innovations Chimiques Sinnova | Method for producing higher molecular alcohols |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2612527A (en) * | 1947-06-27 | 1952-09-30 | Anglaret Paul | Method of reduction of esters, etholides, glycerides |
US2729541A (en) * | 1953-03-24 | 1956-01-03 | Ethyl Corp | Preparation of metal cyanates |
US2819318A (en) * | 1953-12-02 | 1958-01-07 | Ethyl Corp | Alcohols derived from babassu oil |
US2915564A (en) * | 1955-04-15 | 1959-12-01 | Nat Distillers Chem Corp | Reduction of fatty acid esters to produce alcohols |
US2865968A (en) * | 1955-05-06 | 1958-12-23 | Nat Distillers Chem Corp | Production of fatty alcohols |
US2889198A (en) * | 1956-10-01 | 1959-06-02 | Emery Industries Inc | Manufacture of cyanates |
US4496529A (en) * | 1984-06-20 | 1985-01-29 | Olin Corporation | Preparation of metal cyanates from alkyl carbamates |
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