WO1990009978A2 - Process for producing esters of (meth)acrylic acid - Google Patents
Process for producing esters of (meth)acrylic acid Download PDFInfo
- Publication number
- WO1990009978A2 WO1990009978A2 PCT/EP1990/000877 EP9000877W WO9009978A2 WO 1990009978 A2 WO1990009978 A2 WO 1990009978A2 EP 9000877 W EP9000877 W EP 9000877W WO 9009978 A2 WO9009978 A2 WO 9009978A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- meth
- fatty alcohols
- acrylic acid
- esters
- carbon atoms
- Prior art date
Links
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
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
-
- 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
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/88—Separation; Purification; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification of at least one compound
Definitions
- the invention relates to a process for the preparation of esters of (meth) acrylic acid with straight-chain, saturated or unsaturated, fatty alcohols containing 8 to 22 carbon toe.
- Esters of (Me h) acyic acid with straight-chain, saturated or unsaturated, fatty alcohols containing 8 to 22 carbon atoms are intermediate products for the production of poly (meth) acrylates, which in turn are used as coating compositions, lacquers, adhesives, binders for leather, paper and textiles and the like can be used.
- esters of the (meth) acrylic acid mentioned above particularly with regard to their color stability, the color stability being dependent in particular on the quality of the fatty alcohols having 8 to 22 carbon atoms from which the (meth) acrylic acid esters are prepared.
- the Hazen color number determined in the APHA method in accordance with DIN 53409 is used as a measure of the color stability, which results if the (meth) acrylic acid esters are damaged under defined conditions at elevated temperatures and in the presence of atmospheric oxygen. It has been shown that, for example, even a chemically pure cig fatty alcohol reacts with (meth) acrylic acid to give (meth) acrylic acid esters which have Hazen color numbers of over 500.
- U.S. Patent 3,642,915 relates to the purification of synthetic alcohols, especially oxo alcohols, by ozonation and subsequent hydrogenation, e.g. with sodium boranate. According to column 3, lines 71-75, olefinic double bonds are to be converted into CO compounds and the latter are then hydrogenated to the corresponding alcohols.
- the publication does not contain any reference to fatty alcohols of natural origin.
- U.S. Patent 3,860,520 relates to the cleaning of fatty alcohols from 6 to e.g. 30 carbon atoms by reacting them with borohydrides, especially sodium boranate.
- the fatty alcohols are Ziegler alcohols which contain isomerization products and diols as impurities (column 1, line 56 to column 2, line 9); However, these impurities, which are said to be responsible for the undesirable smell of the sulfonation products obtainable from the alcohols, do not occur in fatty alcohols of natural origin.
- GB-PS 2 072 656 relates to the purification of organic compounds by treatment with borohydrides, in particular sodium boranate, in the acidic pH range in the absence of water. Fatty acids are given as the only example of compounds to be cleaned.
- the invention is based on the knowledge that when using fatty alcohols with 8 to 22 carbon atoms, which were distilled over sodium boranate before the reaction with (meth) acrylic acid, (meth) acrylic acid esters can be obtained Hazen color numbers of less than 500, in particular less than 250, can be obtained.
- the invention is directed to a process for the preparation of esters of (meth) acrylic acid with straight-chain, saturated or unsaturated, fatty alcohols containing 8 to 22 carbon atoms, in which the fatty alcohols are distilled over sodium boranate, optionally under reduced pressure, and the so obtained, purified fatty alcohols reacted with (meth) acrylic acid.
- Typical fatty alcohols for use in the process of the invention are alkan-1-ols e.g. Octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol and docosanol, and also unsaturated fatty alcohols such as octadecenol, eicosenol and docosenol.
- Technical mixtures of the abovementioned alcohols can also be used.
- the above-mentioned fatty alcohols are distilled over sodium boranate, especially in the case of fatty alcohols with a longer alkyl chain, under reduced pressure, e.g. in water jet or oil pump vacuum. It may be expedient to carry out the distillation over sodium boranate at the same time under fractional conditions and to discard the occurring, usually small proportions of the pre- and post-product, i.e. to use only the main product for the production of the (meth) acrylic acid esters.
- the process of the invention is particularly suitable for the production of esters of (meth) acrylic acid with straight-chain, saturated fatty alcohols from the above list, which contain 12 to 18 carbon atoms.
- Saturated fatty alcohols including their technical mixtures, which are derived from fats and oils of vegetable and / or animal origin, e.g. can be obtained from coconut, sunflower, soybean, rapeseed, palm and palm kernel oil as well as from beef tallow and lard.
- fatty alcohols are mostly used in the form of their technical mixtures with other fatty alcohols.
- Typical examples of such fatty alcohols from natural fats and oils are caprylic, pelargonium, capric, lauryl, myristyl, cetyl, stearyl, arachidyl and behenyl alcohol.
- the fatty alcohols are distilled in the presence of 0.025 to 2, in particular 0.05 to 1,% by weight sodium boranate, based on fatty alcohol.
- the method of the invention is explained in more detail below on the basis of preferred exemplary embodiments.
- the starting material used was a commercially available C] _g fatty alcohol with a C-chain distribution determined by gas chromatography, Cig: 0.2%, Cig: 99.7% and C2 f j : 0.1% and an iodine number (IZ) of 0.2. a saponification number (VZ) of 0.3, an acid number (SZ) of 0.2 and a hydroxyl number (OHZ) of 205.7.
- Caster 203 0.4 0.2 35.1 g of the above-mentioned main distillation run and 14.4 g of methacrylic acid were placed in a glass cylinder with a height of 23.5 cm and an inner diameter of 30 mm and with 0.03 g of hydroquinone and then with 0.5 g of p -Toluenesulfonic acid added.
- An immersion tube was placed on the glass cylinder.
- the reaction mixture was heated to 113-117 ° C. in an oil bath for 4 h; 1.6 l of air per hour were blown through the reaction mixture during this period.
- the (meth) acrylic acid ester formed had a Hazen color number of 110; the determination of the Hazen color number is explained below.
- Example 1 was repeated, the fatty alcohol being distilled over 1% by weight of sodium boranate. The fractions obtained and their characteristics are shown in the following list:
- Hazen color number (main run): 200 Determination of the Hazen color number:
- Lamotte Chemical (Chestertown, Maryland, U.S.A.) was used to determine the Hazen color numbers in the range of more than 200.
- the cuvettes were called Lamotte B and were characterized by the following parameters: measuring volume 50 ml, height 23 cm, inner diameter 1.9 cm, wall thickness 1 mm.
- Hazen color numbers of less than 200 were determined in order to achieve a higher measurement accuracy in a device with the name Nessleriser from Lovibond.
- the layer height of the cuvettes was 113 mm.
- Hazen APHA color discs from Lovibond were used to determine the color values.
- Example 1 a) the commercially available cig fatty alcohol mentioned in Example 1 with the composition described in Example 1 and as there, but without sodium boranate, fractionally distilled;
- Example 2 b) the cig fatty alcohol described in Example 1, undistilled; c) 100 g of the cig fatty alcohol described in Example 1, washed once at 90 ° C. with 100 ml of 1% sodium hydrogen sulfite solution; after phase separation, the organic phase was washed 5 times with hot water and then dried over sodium sulfate.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3906108A DE3906108A1 (en) | 1989-02-27 | 1989-02-27 | METHOD FOR PRODUCING ESTERS OF (METH) ACRYLIC ACID |
DEP3906108.6 | 1989-02-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1990009978A2 true WO1990009978A2 (en) | 1990-09-07 |
WO1990009978A3 WO1990009978A3 (en) | 1990-11-15 |
Family
ID=6375041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1990/000877 WO1990009978A2 (en) | 1989-02-27 | 1990-02-19 | Process for producing esters of (meth)acrylic acid |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0460119A1 (en) |
DE (1) | DE3906108A1 (en) |
WO (1) | WO1990009978A2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3065258A (en) * | 1959-07-23 | 1962-11-20 | Exxon Research Engineering Co | Method of stabilizing alcohols with alkali metal aluminum hydrides |
US3860520A (en) * | 1967-08-22 | 1975-01-14 | Continental Oil Co | Odor reduction in alcohols |
-
1989
- 1989-02-27 DE DE3906108A patent/DE3906108A1/en not_active Withdrawn
-
1990
- 1990-02-19 EP EP90908510A patent/EP0460119A1/en not_active Withdrawn
- 1990-02-19 WO PCT/EP1990/000877 patent/WO1990009978A2/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3065258A (en) * | 1959-07-23 | 1962-11-20 | Exxon Research Engineering Co | Method of stabilizing alcohols with alkali metal aluminum hydrides |
US3860520A (en) * | 1967-08-22 | 1975-01-14 | Continental Oil Co | Odor reduction in alcohols |
Also Published As
Publication number | Publication date |
---|---|
WO1990009978A3 (en) | 1990-11-15 |
EP0460119A1 (en) | 1991-12-11 |
DE3906108A1 (en) | 1990-08-30 |
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