SU478055A1 - The method of obtaining synthetic lubricating oil - Google Patents

Description

The invention relates to a process for the preparation of synthetic lubricating oil. A known method for producing synthetic lubricating oil by esterifying with neopentyl polyols with isostatic acids, for example, dialkyl monocarboxylic acids. Oils obtained in a known manner are characterized by high temperature setting (-32 and -ZO s) and cannot be used as the basis of aviation lubricating oils. In order to obtain a thermostable synthetic lubricating oil with a low pour point and improved lubricating properties, it is proposed to use a mixture of d-alkyl and 0 (, d-dialkyl monocarboxylic acids with 5 0 -2 O carbon atoms. Mono-carboxylic acids with esterification of neopentyl polyols preferably desiccated through chlorohydrin 0 (-alkyl-, O, CA-dialkyl monocarboxylic. Acids, followed by isolation of the product. When direct esterification of neopentyl polyol with d-branched acids in the presence of In the known esterification catalysts, the yield of the target product does not exceed 4O%, which is 2 times lower than in the esterification with acid chlorides. d -Al-, a, C (-dalkylmoiocarboxylic acids are obtained by telomerizing ethylene with lower monocarbonsic acids. Two fractions of acids. The 1 fraction of fraction () contains about 6% of the Gl-alkyl monocarboxylic acids; they contain one substituent C or C in the O position. The remainder of the -01 01 dialkyl monocarboxylic acid fraction. The higher fraction (s, -C,) mainly consists of J. J. X b / Qf, Q (- dialkyl monozharboxylic acids, one of the substituents is butyl, and the other) S-S The composition of acids obtained by the telomerization of ethylene with propionic acid with is presented in Table. 1.1

Table 1

Characteristics of the fractions used

Table 2 "-branched acids are presented in table 2. The presence in the composition of 0 (- branched 1 acid with tertiary and quaternary carbon atoms of the gas is J Juice heat stable lubricating oils with required viscosity and thermal properties .. Lubricant, which is co-oil. Neopentyl polyols and ethers (X-alkyl, I d , with (-dialkylmonocarboxylic acids, o5 gives a number of advantages in comparison with the known oils: they are thermally stable up to 225, they are characterized by low pour point and good lubricating properties. Example. The flask is loaded with methyl acetate (TMP), heating are added dropwise to 50 ° C and added dropwise with stirring; the acidic fractions of the C-C acids. The reaction temperature is gradually increased to 90-1 ° C. t. The released hydrogen is released through water with an indicator Nitrogen is used to blow off traces of nitrogen., ..., ..., -.-...., 9 The reaction is considered complete if the inicator remains neutral. Next, the reaction product is neutralized with a 3% alkaline solution G1, washed with water and dried. After distilling off the light portion of the product in vacuum at a residual pressure of 1-2 mm Hg. Art. the residue, which is the desired product, is purified with a mixture of adsorbents (alumina and coal), taken in an amount of 3% per load. Oil yield 84.7 wt. % Example 2. Analogously to example 1 .oolve neopentylglycol estericahshee nepentylglycol (NPG) lubricating oils with an acid fraction Oil yield 72.5 wt. % Example 3. Analogously to Example 1, pentaerythritol ester is synthesized. (PET) and fractions of acids C.-C. Output i 11 1UI oil 86.0 weight. % The physical and chemical characteristics of the oils are given in table. 3

G-CD CJ CD CO GTRedit a preliminary assessment of the thermal stability and lubricity of the proposed lubricants. Thermogravimetric to "Ustag- / s method

Lubricating properties are assessed on a four-ball friction machine by a complex method, which involves the determination of individual lubricating ability psazazateli: load capacity, characterized by a load, vyztayuschaya

teasers (P); extreme pressure properties, ha3

Table 4

measured by a scoring factor (K) and anti-wear properties characterized by a wear coefficient (K). Test

"ZOR is conducted at a speed of 1500 rpm on balls with a diameter of 12.7 mm, made of steel SH-15 at 2 ° C. The results are presented in Table. five.

T a b e c i 5. The stability of lubricating oils to thermal effects. It is shown that oils on the basis of NPG and UMP are stable up to 225 ° С, and on the basis of:

.12

The given data witnessed the goal of lowering the freezing temperature.

Satisfactory lubricating properties and improving the lubricating properties of oil,

oils as Monsarbonic acids used by the invention of atoms of the invention.

Claims (2)

1, a process for the preparation of a synthetic material and the fact that neopentyl polyol of sub-lubricating oil, by reaction, interacts with an eopentyl polyol chloride with Monsjarbons ' s acid d-alkyl- and a, C (-dalkyl monocarbonates, characterized by the output acids. 478055 . a mixture of 01 -alkyl and 0 d-dialkylmono5-carboxylic acids with 5-20 carbon 2. The method according to p. 1, about tl and h