The method of obtaining substituted in the nucleus monochloropropane aromatic hydrocarbons

 

(57) Abstract:

Use: in organic synthesis as polyproducts the invention is the product of f-crystals: N (R . R . R } where p is 1 to 3. Rees 6-p 1 2 3 g Gent 1: the corresponding hydrocarbon. Reagent 2: chlorine. Reaction conditions: liquid hydrogen chloride 90 - 40° C, pressure 1-60 ATM, the molar ratio of chlorine and hydrocarbon (02 - 1): 1. 1 table

 

Same patents:

FIELD: industrial organic synthesis.

SUBSTANCE: invention is dealing with production of chlorohydrocarbons exhibiting plasticizing properties in polymer compositions in production of synthetic building materials, varnishes and paints, artificial films and leathers, in rubber industry, and as fire-retardant additives in polymers. Process comprises chlorination of waste obtained in production of C14-C32 fraction by ethylene-α-olefin oligomerization. Chlorination is accomplished in two steps: addition chlorination at 35-55°C followed by substitution chlorination at 40-105°C. Chlorohydrocarbons thus obtained can, in particular, be used as secondary plasticizer in polyvinylchloride compositions.

EFFECT: reduced expenses due to using production waste.

4 tbl, 30 ex

FIELD: petrochemical and industrial organic synthesis.

SUBSTANCE: process comprises separating gaseous pyrolysis products to recover ethylene-containing fraction with 54-65% ethylene content and C3-C5-hydrocarbon fraction. Ethylene-containing fraction is subjected to liquid-phase catalytic chlorination. Gas phase of chlorination product is purified via adsorption and fed into furnace as fuel. C3-C5-Hydrocarbon fraction is subjected to exhaustive hydrogenation, hydrogenation product is combined with fresh raw material at weight ratio (0.05ч1):1 and sent to pyrolysis plant.

EFFECT: achieved integration of process, increased reliability thereof, and reduced expenses.

1 dwg, 1 tbl, 15 ex

FIELD: organic chemistry.

SUBSTANCE: 1,2-dichloroethane is obtained by liquid phase ethylene chlorination with discharging of reaction heat due to operation medium boiling. In claimed process nitrogen is added to chlorine and ethylene reagents. Ratio of chlorine volume consumption to nitrogen volume consumption is maintained as 1:1. Reaction is carried out at temperature lower than 1,2-dichloroethane boiling point, and discharging of reaction heat is carried out by evaporative cooling of operation medium in nitrogen.

EFFECT: process of increased selectivity; decreased yield of by-products.

1 tbl, 5 dwg

FIELD: chemical industry; designs of the bubble-type reactors for production of 1.2-dichloroethane.

SUBSTANCE: the invention is pertaining to the design of the bubble-type reactors for production of 1.2-dichloroethane by the method of the liquid-phase chlorination of ethylene with the reaction heat removal at boiling of the working medium. As the contact device the reactor uses two layers of the metallic nozzle. The liquid 1.2-dichloroethane is fed from above to the nozzle, into the space between the layers of the nozzle feed the gaseous chlorine with nitrogen, and under the lower layer of the nozzle feed the gaseous ethylene with nitrogen, that allows to reduce the diameter of the reactor in 1.5-2 times due to the increased effectiveness of stirring and formation of the developed contact surface of the phases. At that the heat of the reaction is removed by evaporation of 1.2-dichloroethane in nitrogen. At that the temperature of the liquid is maintained below the boiling temperature. The technical result of the invention is the increased selectivity of the process, reduction of the outlet of the by-products (the highest ethane chlorides) and the decreased overall dimensions of the reactor.

EFFECT: the invention ensures the increased selectivity of the process, reduction of the outlet of the by-products (the highest ethane chlorides) and the decreased overall dimensions of the reactor.

1 ex, 4 dwg

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of 1,2-dichloroethane by method of liquid-phase chlorination of ethylene. The process is carried out by direct feeding gaseous reagents chlorine and ethylene in liquid reaction medium of reactor. Before feeding into reactor chlorine and ethylene are heated preliminary in heat-exchangers to temperature equal to that of liquid in reactor. Method provides enhancing selectivity of process and reducing formation of by-side substances representing higher chlorine-derivatives of ethane.

EFFECT: improved method of synthesis.

4 dwg, 1 ex

FIELD: chemical technology.

SUBSTANCE: invention relates to a method for synthesis of 1,2-dichloroethane by method of liquid-phase chlorination of ethylene. Method involves maintaining the optimal ratio of heat eliminated based on evaporation and heat eliminated based on cooling a liquid medium in a heat exchanger in the process. One-sixth part of heat formed in reactor is eliminated based on evaporation of synthesized compound in boiling and 5/6 part of formed heat is eliminated based on circulation of liquid working medium in external heat exchanger. The temperature gradient in the reaction zone is maintained equal 52°C. Invention provides enhancing selectivity of process and reducing amount of by-side products of reaction (higher chlorine-derivate of ethane).

EFFECT: improved method of synthesis.

3 dwg, 1 ex

FIELD: industrial organic synthesis.

SUBSTANCE: invention relates to a process of liquid-phase chlorination of ethylene wherein reaction heat is removed by means of vaporization of reaction medium. Process is conducted at vacuum-mediated reduction of reaction medium boiling temperature below 60°C, vacuum being developed because of condensation of vapors formed in external condenser accompanied by removal of non-condensed gases by vacuum pump.

EFFECT: enhanced selectivity of process and decreased yield of by-products (higher chlorine derivatives of ethane).

4 dwg

FIELD: chemical industry.

SUBSTANCE: vacuum reactor comprises tower (1), distributors of chlorine (2) and ethylene (3), circulation pipe (5), perforated plates (6), condenser (7), pump (8), vacuum-pump (9), and hydraulic valve (10).

EFFECT: improved quality of the product.

4 dwg

FIELD: chemical industry; apparatuses for production of the chlorinated allyl.

SUBSTANCE: the invention presents the reactor for production of the chlorinated allyl intended for realization of the method of production of the chlorinated allyl by the direct gaseous phase chlorination of the propylene. The reactor includes the closed circuit of circulation of the reaction gases, the devices of injection of the source propylene and chlorine, the device of the forced circulation of the part of the reaction gases and the device of withdrawal of the other part of the reaction gases. At that the closed circuit of the reaction gases circulation forms the jet pump, which includes in series connected the reception chamber, the mixing chamber and the diffuser, and the pipe of the circulation circuit connecting the outlet of the diffuser with the appropriate inlet of the reception chamber of the injector and acting as the main reaction zone of the ideal displacement with the presence time of 0.7-0.9 s, in which the scatter of the temperatures does not exceed ±10°С. The reception chamber contains the nozzles used as the devices for injection of the source propylene and chlorine. The jet pump ensures fulfillment of the concerted functions: introduction of the streams of the source propylene and chlorine, which are the working injecting streams; the forced circulation pump with the repetition factor of 5-10 of the reaction gases stream, which is the injected stream; the high-velocity mixer and the preheater of the source reactants in the mixing chamber due to the strong turbulence during (0.01-0.04)s, which is formed by the combination of the nozzles of the injected gases at the arrangement of the nozzle/ nozzles of the chlorine coaxially to the main nozzle of the propylene arranged on the shaft of the mixing chamber. The technical result of the invention is, that the presented design of the reactor allows to increase the selectivity of the process of production of the chlorinated allyl.

EFFECT: the invention provides, that the presented design of the reactor allows to increase the selectivity of the process of production of the chlorinated allyl.

1 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to method of producing high purity 1,2-dichloroethane from dissolved chlorine and dissolved ethylene which are brought into contact with each other while using a liquid reaction medium excited for circulation, where the said medium essentially consists of 1,2-dichloroethane and a catalyst and at least passes through a vertical reaction zone which forms a loop, where both knees of the loop are joined by a gas separator lying above, from which the reaction product is tapped in gaseous and/or liquid form, characterised by that: at least 3 supply sections are located in the knee of the loop along which the liquid flows upwards; and each of these supply sections consists of a unit for supplying dissolved or gaseous ethylene located at the inlet of the section, and a unit for supplying dissolved chlorine located at the output of the section, and can also have static mixing devices. The invention also relates to a device for implementing the said method.

EFFECT: method is more cost-effective, enables increase of power without increasing outside dimensions of the reactor and simultaneous production of high purity dichloroethane.

3 cl, 1 dwg

FIELD: chemistry, in particular utilization of chlorine-containing waste.

SUBSTANCE: claimed method includes passing of organochlorine compound vapors blended with oxygen-containing reaction gaseous mixture through catalyst layer providing oxidation of starting organochlorine compounds. Said catalyst represents geometrically structured system from microfibers with length of 5-20 mum. Catalyst has active centers which are characterized by presence of absorption band in absorbed ammonia IR-spectrum with wave number ν = 1410-1440 cm-1; contains platinum group metal as active ingredient; and glass fiber carrier. Said carrier in NMR29Si-spectrum has lines with chemical shifts of -100±3 ppm (Q3-line) and -110±3 ppm (Q4-line) in integral intensity ratio of Q3/Q4 = 0.7-1.2; in IR-spectrum it has hydroxyl absorption band with wave number ν = 3620-1440 cm-1 and half-width of 65-75 cm-1; has specific surface, measured by BET using argon thermal absorption: SAr = 0.5-30 m2/g; surface area, measured by alkali titration: SNa = 10-250 m2/g, wherein SNa/SAr = 5-30.

EFFECT: selective oxidation of starting organochlorine compounds to safe and easily utilizing substances without toxic by-product formation.

3 cl, 4 ex

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