Method of producing ether-like product

专利摘要:
Organic esters, to be employed to make up lubricating compositions are disclosed, said esters being the products of the reaction between a diol and a triol, on the one hand, and a mixture of saturated monocarboxylic acids, on the other hand. The ratios of the diol to the triol (molarly) and the structure and number of carbon atoms of the saturated monocarboxylic acids are critical. Critical values are given, as well as examples of practical use; the viscosity and viscosity index properties of the novel esters out do those of the conventional esters to a degree.
公开号:SU858558A3
申请号:SU762434654
申请日:1976-12-10
公开日:1981-08-23
发明作者:Манчини Джузеппе；Импарато Луиджи；Берти Франко
申请人:Снампрогетти С.П.А. (Фирма)；
IPC主号:

专利说明:

one
The invention relates to an improvement in the process for producing an ether-like product that can be used in lubricating compositions for internal combustion engines.
There are various ether-like products derived from various acids and alcohols. Thus, an ester-based lubricating oil based on diisooctyl sebacate (DOS) or neopentyl esters of aliphatic acids, or pentaerythritol-based oil and fractions of normal fatty acids Su - C, or based on 2,2 dialkyl substituted alcohols and C 5 aliphatic acids are used. These esters are obtained by esterifying the corresponding acids and alcohols in the presence of an acidic catalyst 1.
However, these oils are characterized by a low pour point (-16) - (-39) C, flat in the viscous-temperature dependence, but do not have a high thermal stability. To increase the latter, aromatic esters are used, for which thermal stability is maintained up to 330 ° C.
The closest in technical essence to the present invention is a method for producing an ether-like product, by the interaction of two or more polyhydroxy compounds of the general formula
 CH, OK
GO
 CHjOH
where R is methyl or hydroxymethyl;
t5 Ra is methyl or ethyl;
with monocarboxylic acids of the general formula Rg-COOH, where "C is alkyl, and C.J (two or more acids), in the presence of an acid catalysis of the 2C torus at 110-240 ° C 2.
However, formed with the known
the way ether-like products have
viscosity 3.5-4.4 cSt at 98.9s, which
5 is insufficient for lubricants
oils for a specific purpose.
The purpose of the invention is to improve the quality of target ester-like products.
The goal is achieved in a manner in which the interaction of neopentylglycodone and trimethylolpropane with the acids of the general formulas Rtj-COOH I R -COOH II where R is alkyl
R - alkyl With - at a molar ratio of acids / 1: 11 2, 5-16 and a molar ratio of neopentyl glycol (NPG) and trimethylolpropane (TMP), equal to 0.125-0.389 in the presence of an acid catalyst, for example methanesulfonic acid at 110-240 C,
This allows an ether-like product with a higher viscosity of 98.9 s and a higher viscosity index (temperature coefficient of viscosity in relative units) to be obtained.
The proposed method is carried out as follows.
Example. For the reaction, 8.84 g (0.085 mol) of neopentyl glycol (NPG), 55.62 g (0.415 mol) of trimethylolpropane (TMP) with a molar ratio of NPG: TMP of 0.2049, 176 g (1.019 mol) of nonane acid (CQ) are used,
57.73 g (0.283 mol) of dodecanoic acid (.L 20.14 g (0.085 mol) of palmitic acid (C.,) and 7.30 g (0.028 mol) of stearic acid (C.g).
Heating of this mixture is carried out in a nitrogen atmosphere at a gradually increasing temperature from 120 to 210 ° C for 8 hours with the distillation of the reaction water in the presence of 1.5 g of methanesulfonic acid as an acidic catalyst. After the completion of the reaction, the residual water is distilled off in a nitrogen atmosphere and the desired product A is treated with alumina for final drying.
in tab. Figure 1 shows the conditions for preparing other products B-E from the corresponding acids and alcohols (for comparison, product G is given). Q In the table. 2 shows the physico-chemical characteristics of the resulting products AE. As can be seen from the data table. 2, ether-like products are obtained, having the best viscosity index and viscosity index.
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S a: ase Formula of the invention A method for preparing an ester-like product by esterifying neopenty glycol and trimethylolpropane with fatty acids at 110-24 ° C in the presence of methanesulfonic acid, characterized in that, in order to improve the quality of the target products, the acids of general formulas 1 and 11 -COOE R -COOH ,, 12 where R1 is alkyl R is alkyl C .. -C with a molar ratio of 1:11 acids of 2.5-16 and a molar ratio of neopentyl glycol and trimethylolpropane 0.125-0.389. Sources of information taken into account in the examination 1. USSR author's certificate 525663, cl. C 07 C 69/76, 1974. 2. Italian patent number 991051, l. C 10 M 1/26, published 30.07.75 (prototype).

权利要求:
Claims (1)
[1]
Claim
A method of producing an ether-like product by esterification of neopentyl glycol and trimethylolpropane with fatty acids at 110-240 ° C in the presence of methanesulfonic acid, characterized in that, in order to improve the quality of the target products, compounds of the general formulas 1 and 11 ^ -COOH are used as acids
R is COOH ,, where R1 is alkyl C -C ₉ ;
R ² is alkyl-C ^ y with a molar ratio of acids 1:11 = 2.5-16 and a molar ratio of neopentyl glycol and trimethylolpropane, 0.125-0.389.

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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IT30195/75A|IT1050335B|1975-12-11|1975-12-11|ORGANIC ESTERS TO BE USED IN LUBRICANT COMPOSITIONS|

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