1. A process of producing an ammonium salt composition, comprising the steps of:
(a) providing a process stream comprising sulfuric acid and at least one tertiary amine or a precursor thereof;
(b) contacting the process stream with ammonia under conditions effective to form a waste stream comprising water, the tertiary amine, and ammonia and a product stream comprising a first amount of ammonium salt;
(c) deriving from the waste stream an off gas stream comprising a preliminary amount of ammonia; and
(d) contacting at least a portion of the off gas stream with an acid under conditions effective to form an ammonium salt stream comprising a second amount of ammonium salt and a purge stream comprising a reduced amount of ammonia.
2. The process of claim 1, wherein the acid in step (d) is sulfuric acid and the ammonium salt is ammonium sulfate.
3. The process of claim 1, wherein the purge stream further comprises nitrogen, acetone, dichloromethane, organics, and water.
4. The process of claim 1, wherein the deriving comprises separating the waste stream into a vapor stream, a liquid organic phase comprising the at least one tertiary amine, and an aqueous phase, and wherein the vapor stream comprises the off gas stream.
5. The process of claim 1, wherein step (b) is performed in a first reactor and wherein the process further comprises recycling the ammonium salt residue stream to the first reactor.
6. The process of claim 1, wherein at least 90 mol % of a total amount of ammonia fed to the process is converted.
7. The process of claim 6, wherein the total amount of ammonia fed to the process comprises the ammonia used in step (b).
8. The process of claim 1, wherein the reduced amount of ammonia in the purge stream is less than 10% of a total amount of ammonia fed to the process.
9. The process of claim 1, wherein the reduced amount is at least 90% less than the preliminary amount.
10. The process of claim 1, wherein an overall production of ammonium salt is greater than an expected production of ammonium salt wherein the expected production of ammonium salt is based on the conversion of sulfuric acid in the waste stream and the ammonium salt selectivity.
11. The process of claim 1, wherein the purge stream further comprises a first amount of methylene dichloride, and wherein the process further comprises contacting the purge stream with an adsorbent composition to form a purified stream comprising a reduced amount of methylene dichloride.
12. The process of claim 1, wherein the adsorbent comprises polyethylene glycol ether.
13. A process for treating an off gas stream from a potassium acesulfame production process, comprising the steps of
(a) forming the off gas stream comprising a first amount of ammonia;
(b) treating the off gas stream with an acid in a column to form an ammonium salt residue stream comprising an ammonium salt and a treated off gas stream comprising a reduced amount of ammonia.
14. The process of claim 13, wherein the forming comprises the steps of:
providing a potassium acesulfame process stream comprising sulfuric acid and tertiary amines;
contacting the process stream with ammonia under conditions effective to form a waste stream comprising water, the tertiary amine, and ammonia and a product stream comprising ammonium sulfate; and
deriving from the distillate the off gas stream.
15. The process of claim 14, wherein the deriving comprises the step of:
separating the waste stream into a vapor stream, a liquid organic phase comprising the tertiary amines, and an aqueous phase, and wherein the vapor stream comprises the off gas stream.
16. The process of claim 13, wherein in the treated off gas comprises less than 10 mol % ammonia.
17. A method of producing an ammonium salt composition, comprising the steps of:
(a) providing a process stream comprising sulfuric acid, methylene dichloride, water, and a tertiary amine;
(b) contacting the process stream with ammonia under conditions effective to form a waste stream comprising ammonia, water, the tertiary amine, and the methylene dichoride, and a product stream comprising a first amount of ammonium salt;
(c) deriving from the waste stream an off gas stream comprising a preliminary amount of ammonia and methylene dichloride;
(d) contacting the off gas stream with an acid under conditions effective to form an ammonium salt stream comprising a second amount of ammonium salt and an overhead stream comprising methylene dichloride and a reduced amount of ammonia based on the preliminary amount of ammonia; and
(e) contacting the overhead stream with an adsorbent under conditions effective to reduce the amount of methylene dichloride contained therein.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A mobile communication device comprising:
a user interface supporting a user in adjusting an equalizer setting of a received sound;
an equalizer adjusting the tone color of the received sound; and
a controller for controlling the equalizer according to the equalizer setting that is inputted through the user interface.
2. The mobile communication device according to claim 1, further comprising an internal memory, which stores the equalizer setting data.
3. The mobile communication device according to claim 2, wherein the user interface includes:
a user mode setting part allowing adjustment of the equalizer setting of the received sound; and
a country-specific mode setting part allowing different types of equalizer setting according to countries to be used when an automatic roaming service is used.
4. The mobile communication device according to claim 3, wherein the equalizer setting data comprises a data structure, which includes a currently-used equalizer setting, a user-selected equalizer setting and a country-specific equalizer setting.
5. The mobile communication device according to claim 4, wherein each of the currently-used equalizer setting and the user-selected equalizer setting comprises a data structure, which includes a frequency number, a plurality of frequencies corresponding to the frequency number and gains of the frequencies.
6. The mobile communication device according to claim 5, wherein the country-specific equalizer setting comprises a data structure, which includes a country number, a plurality of country names corresponding to the country number and an equalizer setting for each country name.
7. The mobile communication device according to claim 4, wherein the country-specific mode setting part displays country-specific equalizer setting information stored in the internal memory and applies the equalizer setting for a selected country to the equalizer.
8. The mobile communication device according to claim 4, wherein the country-specific module updates the country-specific equalizer setting in the internal memory when a new country is added, country information is deleted from the memory, country name is edited, or the equalizer setting is edited in a corresponding country.
9. The mobile communication device according to claim 4, further comprising:
a data link connected to an external device, wherein the data link stores an equalizer setting data inputted from the external device in the internal memory, and applies the currently-used equalizer setting included in the inputted equalizer setting data to the equalizer.
10. The mobile communication device according to claim 1, wherein the user interface provides an option of roaming service synchronization, and when the option of roaming service synchronization is selected, the user interface applies an equalizer setting optimized for a roaming service area to the equalizer.
11. The mobile communication device according to claim 10, wherein, when the roaming service synchronization option is selected, in response to a change in roaming service areas, the user interface automatically applies the equalizer setting, optimized for a new roaming service area, to the equalizer.
12. A method of setting the tone color of a received sound in a mobile communication device, comprising:
providing an interface, which supports a user in adjusting an equalizer setting of the received sound; and
adjusting, at an equalizer, the tone color of the received sound in response to an input through the user interface.
13. The method according to claim 12, wherein the providing of an interface comprises:
displaying an equalizer setting menu, which supports selecting one of a country-specific mode, in which different equalizer settings are used according to countries, and a user mode, which enables a user to adjust the equalizer setting of the received sound; and
inputting the equalizer setting by selecting one mode from the equalizer setting menu.
14. The method according to claim 12, wherein the providing of an interface comprises:
providing an option of roaming service synchronization, and when the option is selected, enabling the equalizer setting to be optimized for a selected roaming service area.
15. A method of setting the tone color of a received sound in a mobile communication device, comprising:
connecting to an external device and an receiving equalizer setting therefrom; and
adjusting, at an equalizer, the tone color of the received sound based on the equalizer setting.