A composition, method and applications thereof

a technology of composition and method, applied in the field of organic chemistry, can solve the problems of frequent decoking and deterioration of coil metal of the reactor, and stop the production of ethylene and other industrial products, and achieve the effect of reducing coke deposition

Inactive Publication Date: 2018-07-26
RELIANCE INDUSTRIES LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Despite the efforts employed in the previously, there is still a need for a commercially feasible and inexpensive composition and method to reduce coke deposition on the reactor walls (surface coke) and spalled coke formation during pyrolysis of hydrocarbons to produce light olefins. However, the instant invention overcomes the above mentioned drawbacks through the aspects described herein below.

Problems solved by technology

The inherent problem associated with the material of construction (MOC) of inner surface of reactors / cracker coil units is their tendency to promote the coke formation as the side reaction from thermal cracking leads to undesirable product.
As a result during the decoking process, the production of ethylene and other industrial products is stopped for considerable time and also, frequent decoking deteriorates coil metal of the reactor.
The major challenge experienced in steam cracking is reduction of coke deposition in the radiant section and transfer line exchangers (TLE).

Method used

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  • A composition, method and applications thereof
  • A composition, method and applications thereof
  • A composition, method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

on Cracking with Water as Steam and without Employing the Composition of the Present Disclosure (Control Run)

[0079]An experimental run (R-405) is carried out in a bench scale cracker having a cracker coil made of Incoloy 800HT and using naphtha as the feed. The coil outlet temperature is maintained at a temperature of about 825° C. and steam dilution is at a ratio of about 0.32. The corresponding residence time is around 0.5 seconds. The feed olefin content is found to be about 1.94%. Blank run is carried out using distilled water for steam for a time period of about 48 hours. The surface coke deposited on the surface of thermowell is recorded as 0.26 g at the end of 48 hour run when the furnace is opened after cooling. The reproducibility of the run is tested by repeating the run under same conditions.

example 2

on Cracking with Plant Steam Condensate as Water without Employing the Composition of the Present Disclosure (Control Run)

[0080]An experimental run (R-408) is carried out under the same conditions as the blank run described in example 1, except that the plant steam condensate obtained from quench water comprised of caustic (NaOH), which is being added for pH adjustment in place of water. The blank run is carried out for about 48 hours and the surface coke deposited in presence of caustic is found to be about 0.293 g same range as that of the base runs (Example 1). The quantity of spalled coke from the reactor is found to be 13.28 g. This data is considered as bench mark in assessing the composition of the present disclosure for coke reduction estimation.

example 3

on Cracking in Presence of the Composition of the Present Disclosure

[0081]An experimental test run (R-412) is carried out under the same conditions as the blank run described in example 1, wherein along with the plant steam condensate the composition of the present disclosure is introduced, by dissolving the composition in plant steam condensate at a concentration of about 4 ppmw, wherein calcium acetate is about 65 wt % and potassium carbonate is about 35 wt %. The concentration of the composition is maintained at 4 ppmw throughout the 48 h run of the experiment. The amount of surface coke that is formed during the reaction is found to be much lesser than the runs in Examples 1 and 2 above, and is found to be 0.115 g, as disclosed in FIG. 2. The amount of surface coke that is formed during the reaction comprising the composition of the present disclosure is reduced by about 60% when compared to benchmark base run performed in Example 2 and as described in FIG. 3. The amount of spal...

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Abstract

The instant disclosure relates to a composition comprising potassium carbonate and calcium acetate, optionally along with sulfur containing compound. The composition of the present disclosure reduces coke formation during hydrocarbon cracking, particularly reduces surface coke and spalled coke during hydrocarbon cracking when compared to hydrocarbon cracking without the said composition. The disclosure further relates to a method for reducing formation and/or deposition of coke during pyrolysis or cracking of hydrocarbons.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a national stage filing of PCT Patent Application No. PCT / IB2016 / 054175, filed on Jul. 13, 2016, and entitled “A COMPOSITION, METHOD AND APPLICATIONS THEREOF,” which claims priority to Indian patent application serial number 2656 / MUM / 2015, filed on Jul. 14, 2015, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to the field of organic chemistry, particularly steam cracking of hydrocarbons. The disclosure relates to a composition comprising inorganic salts including but not limiting to Group IA and Group 2A metallic salts, respectively. The composition of the present disclosure is employed for reducing formation and / or deposition of coke in the systems employed for high temperature processing or cracking of hydrocarbons. The present disclosure also relates to addition of a composition comprising inorganic salts including but not limiting to Grou...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10G9/16C10G9/36C10G75/04
CPCC10G9/16C10G9/36C10G75/04C10G2300/4075
Inventor GARIMELLA, PADMAVATHISHARMA, SUMEET KUMARSHARMA, NAGESHJASRA, RAKSH VIRJAIN, LAXMILAL
Owner RELIANCE INDUSTRIES LIMITED
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