DE2407158B2 - PETROL DISTILLATE FUELS OR FUEL - Google Patents

Description

The idea is based on petroleum distillate fuel or propellant 2-ethylhexyl ester in a weight ratio of 1: 1 To provide substances that have a viscosity of 900 to 950 cst due to the inven- tive 60% solution. Appropriate additives larger amounts of separable The corresponding solutions of the individual Polymeridungsbaren Paraffins can contain without sate have viscosities from 2000 to 1500 cst. the The range of application at low temperatures can thus be significantly reduced is restricted. This makes it possible to pump and handle more easily without the need for a user dung of cleavage processes by ordinary distillation The object of the invention is based on the following

lation from crude oils illustrates a larger proportion of medium examples to win distillates.

Suitable petroleum distillate fuels or fuels io example

are those that are produced by distillation from crude oils of various origins and are known as gas oils, a heating oil EL from crude oil from Saudi Arabian ProDiesel oils or light heating oil. You have venience with a boiling range from 220 to 350 ⁰ C «in a boiling range from 120 to 400 ⁰ C. Suitable and a CFPP-Wrt (DIN 51428) of -16 ³ C will have distillates z. B. Pour points from -5 to ^{-30 0} C. 15 a copolymer of ethylene and ethyl-2-hexyl-

The petroleum distillate fuel or propellants entacrylate with 55 mol percent 2-ethylhexyl acrylate (1) with hold oil-soluble copolymers of ethylene and a molecular weight of 3850 as well as a mixed fatty acid vinyl ester with a molecular weight of polymer from ethylene and vinyl acetate with 45 mol 500 to 8000 as well as oil-soluble copolymers of percent vinyl acetate (II) and a molecular weight of ethylene and acrylic acid alkyl esters with a Mole- ao of 3600 in the kular weight of 500 to 10 000 given in the table below. The two mixed quantities and ratios added and the polymerized there are obtained together in amounts from 0.001 to shown results. 0.1 percent by weight. Preferably is
their content from 0.005 to 0.02 percent by weight.
Copolymers of ethylene and fatty acid vinyl esters as Table I and copolymers of ethylene and acrylic acid alkyl esters are in a weight ratio of
1:10 to 10: 1, especially in a weight ratio
from 1: 3 to 3: 1, applied.

It is preferred to use oil-soluble copolymers 3 ° of ethylene and vinyl esters with fatty acids from 1 to 8 carbon atoms, especially 2 to 4 carbon atoms. The content of fatty acid vinyl esters is advantageously 40 to 60 mol percent. The preferred range of molecular weight is 2,000 to 35 8000. Copolymers of ethylene and vinyl acetate, the 40 to Contain 60 mole percent vinyl acetate and have a molecular weight of 3000 to 5000.

Preferred oil-soluble copolymers made from Ethy- 40
len and acrylic acid alkyl esters are those which acrylic esters with alkanols of 2 to 20, in particular 4 to 12
Contain carbon atoms. In the preferred
Copolymers are acrylic acid alkyl esters in men- Man uses the heating agent described in Example 1 and contains 40 to 60 mol percent. Advantageously 45 oil, but if the polymers I listed there are used, the polymers have a molecular weight of and II individually in the following table from -3000 to 5000. The amounts given are of particular technical importance and are derived from a polymer of ethylene and 45 to 60 Mole percent CFPP values. Acrylic acid-2-ethylhexyl ester with a molecular weight of 3000 to 5000 obtained. 50

The indicated molecular weights are determined by the osmometric method. Table II.

Suitable oil-soluble copolymers of ethylene Amount of polymers CFPP value

and fatty acid vinyl esters or acrylic acid alkyl esters by weight to weight ratio

you get z. B. according to procedures as they are from the 55 ^percent

German patents 11 62 630 and 12 50 188 are known. 0.01

The mixtures of the polymers are in the 0.01
Usually as 40 to 60 percent by weight solutions in 0.025
Hydrocarbons, such as heavy gasoline, heavy plateau 60 0.025
format, handled and the petroleum distillates in the
mentioned amounts added. The mixtures of the
The above-mentioned polymers in solution are advantageous insofar as they have a reduced viscosity compared to the same as in the example. For example, the polymers I and II described there have been mixed with a mixture of a copolymer. The more detailed results can be found in the table below for ethylene and vinyl acetate as well as ethylene and acrylic.

lot
Weight
percent Polymers
Weight ratio CFPP value 0.01 80 parts I.
20 TeUe II -30 ° C 0.01 70 parts I.
30 parts II -25 ^ C 0.01 60 parts I.
40 parts II -28 ⁰ C 0.025 70 parts I.
30 parts II -26 ⁰ C Comparative example

I. game 2 -18 ° C. II -20 ° C. I. -19 ° C. II -23 ° C. at

Table III

lot
Weight percent

Polymer weight ratio

0.01

0.01

70 parts I 30 parts II

60 parts I 40 TeU II

CFPP value

-13 ° C

-20 ⁰ C

in the amounts specified in the table below and receives the CFPP values described there.

Table IV

lot

Weight percent

Polymer

CFPP value

0.01
0.01

I II

-10 ⁰ C -1O ⁰ C

Comparative example

From the comparative experiments it can be seen that distillates which are a mixture of the polymers I and II contain a much wider application than the application range described in Example 2 at low temperatures Diesel oil, however, uses polymers 1 and II individually 15 those which contain the polymers individually.

Claims (1)

40 to 100 percent by weight solutions in which they Claim: be handled, have very high viscosities, so that the dosage poses considerable difficulties Petroleum distillate fuels with a rides. For example, a 60% solution of a boiling range from 120 to 400 ⁰ C, with 5 polymer of ethylene and 60 Moiprozent 40 MoI the fuel or fuel and from 0.001 to 0.1 percent overall vinyl acetate at 20 ° C a viscosity by weight percent of a mixture of 2000 cst, while a copolymer of 60 mol- a) an oil-soluble copolymer of ethylene percent ethylene and 40 mol percent acrylic acid gel and fatty acid vinyl esters with a methyl methyl ester of the same concentration has a gross weight of 500 to 8000 and »V.skos.tat of 1500 cst. After all, they are suitable b) a copolymer of öUöslichen Äthy- "called polymers not in the same way for len acrylic acid alkyl esters with a Mo ^oils _and various origins example, suitable lekulargewicht 500-10000 ^SLCH the copolymer of ethylene and 2-Athylhexyl- acrylate for paraffin-rich oils from Iran or Kuwait, in a weight ratio of 1:10 to 10: 1. 15 while the effectiveness with paraffin-rich agents distillates from Libyan oil are insufficient or negligibly small. It is also known from BE-PS 7 24 570 which The pour points of crude oils and shale oils due to the addition of small amounts of copolymers The subject of the invention is to reduce petroleum distillate ethylene and long-chain substituted ethylenes (e.g. fuels or propellants with an improved _{ratio of C 20} -Cjj-methacrylates). The cold at low temperatures. required quantities are 0.02 to 0.05 weight So-called middle distillates, such as gas oils, diesel oils, percent of the oil to be stabilized for an auxiliary © of the heating oils as obtained by distillation from petroleum 25 for the treatment of mass products such as minerals However, depending on the origin of the crude oil, oils have to be used for economic purposes different levels of paraffins. Still too high at lows. Temperatures, as they are especially in winter or It was therefore the technical task to Turkish regions and high altitudes occur, petroleum distillate fuels are available Paraffin crystals precipitate, 30 which are similar to stick earth wax even with small contents Products, asphalt conglomerate point depressants at low temperature none ten and the like. This will show the fluidity of the earth precipitates, especially when Oil distillate fuels have a considerable influence on relatively high proportions of excretable pregnant. In the case of diesel oil, this leads to containing paraffins. The subject of the invention is petroleum distillate or non-uniform supply of fuel to fuels with a boiling range from the combustion units, such as engines or 120 to 400 ⁰ C, consisting of the fuel or fuel. Propulsion jet engines. Faults in the substance and 0.001 to 0.1 percent by weight of a Ge heating oil can also occur in winter if such a mixture is used Decisions caused by low temperatures up _{4 "a) dnem öUöslichen} copolymer of ethylene occurred. But also the demand for middle _{desüllates and} vinyl acid ester with a molecular by pipelines over long distances it is _{not possible to get from 5QQ} ^ _{& m and} In winter they are affected by the precipitation of paraffin stalls _b) ^ _oil-soluble copolymers of ethylene. _{d Acrylic acid alkyl esters} £ _{with a} molecular Attempts have already been made to add 45 to the _{weight of 500} to 10,000
called pour point of such middle distillates reduce the disadvantageous phenomena in the weight ratio 1:10 to 10: 1.
The so improved petroleum distillate fuel or limited use even at low temperatures - fuels have excellent cold stability, to ensure. For this purpose, condensers were used so that they can also be used at low and extreme temperatures cation products from chlorinated paraffins and naph conditions can be used without restriction, thalin is used (see US Pat. No. 2,189,924). To a This also applies if relatively high proportions of However, to be sufficiently successful, the distillates need relatively excretable paraffins large amounts of such condensation products are present. In the ordinary distillation of be turned. In addition, the aim is to use 55 crude oils, i. H. without the use of cleavage processes, By eliminating chlorinated hydrocarbons as much as possible, only a limited amount of consumption is obtained Corrosive gases that arise during combustion, bar distillates with a tolerable proportion of to avoid. excretable paraffins. By application It is also already known that oil-soluble copolymers from cleavage processes make it possible to increase the proportion of ethylene with fatty acid vinyl esters to the pour point of middle distillates. However, this requires the use of degradation (cf. DT-PS 1162 630). significant investment. With the increasing use of copolymers of ethylene and acrylic acid in crude oil, efforts are being made, and esters have already been used in a higher proportion for the same purpose with ordinary distillation (cf. DT-PS 12 50 188). To gain the effectiveness of middle distillates. Up to now, however, this has not been possible for these polymers, in particular in the case of applications, since extensive distillation of small amounts has not yet proven to be technically sufficient as a considerable enrichment in excretable quantities. In addition, paraffins have entered the middle distillates,
the said polymers have the disadvantage that the invention is the general invention