SU732359A1 - Method of producing fillers and plastifiers for rubber and caoutchou - Google Patents

Description

This invention relates to a process for the synthesis of petroleum aromatic fillers and plasticizers of rubber and rubber. The most promising petroleum fillers and plasticizers for rubber and rubber are viscous (with a viscosity of 30-5O) when aromatic oils are used. They use small PN-6 extracts for the selective purification of deasphalted tar, which are byproducts of motor industry oils. Due to the lack of resources of extracts, which meet the technical requirements of GOST on PN-6, the production of low-viscosity aroma filler and plasticizer with high viscosity is an important task. There are known methods for producing aromatic oil fillers and plasticizers from a mixture of extracts of selective purification by vacuum concentration. So, using as raw material extracts of selective purification of distillate oil fraction by vacuum distillation, low-viscosity fillers and plasticizers are obtained; l or, using deasphalted tar extract, viscous residual fillers and plasticizers are obtained by vacuum concentration. iesins by vacuum concentration of crude oil h. According to this, a mixture of extracts for the purification of oil distillate and deasphalted tar, taken in a ratio from 1: 3 to 3: 2, is used as a raw material for vacuum concentration. As a target product, a concentrate-viscous filler and a plasticizer and a distillate are obtained - a low-viscosity filler and plasticizer of rubber and rubber. Significant disadvantages of the process are low yield of viscous filler and plasticizer - no more than 55-60%.

raw materials and low aromatization, as evidenced by low density, high content of paraffinone naphthenic hydrocarbons and high aniline point,

The purpose of the invention is to increase the output and quality of target products.

This goal is achieved by the fact that in the method of obtaining fillers and plasticizers by vacuum concentrations of crude oil, the latter use a mixture of a secondary extract for the selective purification of deasphalted tar and an extract or a secondary extract for the selective distillation, taken in an O ratio, 5-4: 1. Secondary extracts are by-products of motor oil production.

The mixture of extracts is heated in a tube furnace to 36 ° -4 ° C and is fed to a vacuum column for concentration. The residual pressure of the top of the column is less than 100 mm Hg. Art. As a viscous filler and plasticizer from the bottom of the column, the remainder of the vacuum concentration is removed. The boiling point of the residue 46 ° -48d ° C. The quality of the filler and plasticizer regulate the change in the ratio of secondary extracts and the depth of concentration.

To simultaneously obtain a viscous and low-viscous filler and a plasticizer, and thereby increase the yield of the target products, lay down the distillate fraction. The start of boiling of the distillate fraction is from 40 ° -420 ° C and higher, which is determined by the required viscosity. The end of the boiling point is determined by the beginning of the boiling point of the concentrate — the desired product.

Example 1. A mixture consisting of 2 parts of a secondary extract of selectable purification by phenol deasphalted gurron and one part of a secondary extract of selective purification of oil distillation with phenol, into a vacuum unit.

Cube capacity 2SO ml. The head fraction is taken at a residual pressure of 1, 0 mm Hg, Art. and 22 ° C, its consumption is 7%. Then, in the temperature range 220–25 ° C, a distillate fraction — a low-viscosity filler and a plasticizer — is taken. At atmospheric pressure, the boiling range of the distillate fraction is 42 ° -46 ° C. Its yield is 15% based on raw materials. At the same time, a concentrate is obtained with a boiling point of 460 ° C. Its yield on raw materials is 78%. The properties of the raw material, concentrate and distillate fraction, as well as the properties of the known aromatic filler and plasticizers are given in Table. one.

Selection 2. A mixture consisting of 4 parts of a secondary extract and a selective. Phenol cleaning of deasphalted tar and 1 part of the extract for selective purification of oil distillate, in an amount of 100 g are loaded into a cube of a vacuum laboratory unit. The head fraction is taken at a residual pressure of 1.5 mm Hg. Art. and 225 C. Its output is 4-5% for raw materials. Further in the interval

at temperatures of 225-253 ° С, the distillate fraction is taken away - a low-viscosity filler and a plasticizer. Boiling points of the distillate fraction at atmospheric

pressure 423-457 ° C. Its output is 10% of raw materials. At the same time, a concentrate with a boiling point of 457 ° C is obtained in the residue, its yield is 85% for raw materials. The properties of the feedstock, the concentrate and the distillate fraction are given in table. 2

Tabliya2

Example 3. A mixture consisting of 1 part of a secondary extract of selective purification with phenol of deasphalted tar and 2 parts of an extract of purification with phenol of oil distillate 45 tons, in an amount of 100n. load into the cube of the vacuum laboratory setup. Head fraction - low viscosity filler

and the plasticizer is taken at a residual pressure of 4 mm RT. Art. and 318 C. Its output is 55% by weight. for raw materials. At the same time, a concentrate of a viscous filler and a plasticizer with a boiling point of 49 ° C is obtained in the residue. Its yield on the raw material is 45%. The properties of the raw material, concentrate and distillate are given in table. 3

The yield of products, wt.%

Capacity at, g / cm

Viscosity at eat

Aniline point, C

Group composition, weight,% paraffin-naf4555

Oh, 9710,961

428.9

58,443,8

Claims (1)

The claims are characterized in that, in order to increase the yield and quality of the target products, a mixture of a secondary extract of selective refining of deasphalted tar ¹ and an extract or secondary extract of selective refining of oil distillate taken in a ratio of 0.5-4 is used as a crude oil: 1.