To provide a method that enables production of bromine in good yield.

A method for producing bromine includes: a step of supplying a gas containing a bromine compound and a gas containing oxygen to a reactor that includes a catalyst packed bed, and oxidizing the bromine compound to obtain a gas containing bromine, in which the step satisfies the following Inequality (1) and Inequality (2):

0.30a0.55Inequality (1)

0.40L16.0Inequality (2) where a represents porosity [-] of the catalyst packed bed, and L1 is defined by the following Formula (3):

L1=L2V/(P(aV+b))(T+273.14)/273.14Formula (3) L2: Superficial velocity of reaction gas [m/s] P: Reaction pressure [atm] T: Reaction temperature [ C.] V: Reactor volume corresponding to catalyst packed bed [L] a: Porosity of catalyst packed bed [-] b: Pore volume of catalyst packed bed [L].

The disclosure relates in its first aspect to a process of conversion of a gaseous stream comprising methane into hydrogen (51) and carbon (25), the process is remarkable in that it comprises a step (a) of providing a first gaseous stream (3, 7); a step (b) of bromination and synthesis in which the first gaseous stream (3, 7) is put in contact with a second stream (53) comprising bromine resulting in the formation of a third stream (15) comprising methyl bromides and hydrogen bromide, and of a fourth stream (25) comprising carbon including graphite and/or carbon black; a step (c) of separation performed on the third stream (15) to recover a hydrogen bromide-rich stream (41) which is then oxidized in a step (d) to produce a stream (51) comprising hydrogen. The second aspect relates to the installation for performing the process of the first aspect and the third aspect concerns the use of bromine in such process.

The disclosure relates in its first aspect to a process of conversion of a gaseous stream comprising methane into hydrogen (51) and carbon (25), the process is remarkable in that it comprises a step (a) of providing a first gaseous stream (3, 7); a step (b) of bromination and synthesis in which the first gaseous stream (3, 7) is put in contact with a second stream (53) comprising bromine resulting in the formation of a third stream (15) comprising methyl bromides and hydrogen bromide, and of a fourth stream (25) comprising carbon including graphite and/or carbon black; a step (c) of separation performed on the third stream (15) to recover a hydrogen bromide-rich stream (41) which is then oxidized in a step (d) to produce a stream (51) comprising hydrogen. The second aspect relates to the installation for performing the process of the first aspect and the third aspect concerns the use of bromine in such process.

Methods comprise generating chlorine gas in a conversion process that converts metal chloride from an aqueous medium derived from a metal containing aqueous source into a hydroxide material; recovering the chlorine gas; and recovering bromine by reacting the chlorine gas with a bromide containing aqueous source. The methods and apparatus described herein also provide for removing sulfide species and/or organic species and/or transition metals, among others. The methods may be applicable for instance to lithium conversion and may be coupled to a direct extraction process for lithium extraction.

The invention relates to hydrometallurgical method for recovering metals from spent energy storage devices. The method comprises combining aqueous hydrobromic acid leach solution and an electrode material of spent energy storage devices in a reaction vessel, dissolving the metals contained in the electrode material to form soluble metal bromide salts, removing elemental bromine, if formed, from the reaction vessel, separating insoluble material, if present, from the leach solution to obtain a metal-bearing solution and isolating one or more metals from said metal-bearing solution.

A process has been disclosed for preparation of hydrobromic acid from bromine, sulfur dioxide and water, which involves in situ generation of bromine from bittern for the production of hydrobromic acid and separation thereof from co-products, viz., sulfuric and hydrochloric acids. The invented process obviates the need for double distillation or precipitation step for removal of sulfate impurities. The concentration of the product obtained by the disclosed process is about 48% and it contains <15 ppm sulfate and chloride impurities.

A process includes supplying a bromide brine and removing organic compounds from the bromide brine. The method also includes acidifying the bromide brine to form a stream containing hydrobromic acid and separating the hydrobromic acid from the stream containing hydrobromic acid.

The present invention relates to an iodine (I.sub.2) or bromine (Br.sub.2) adsorbent including a zeolite having a Si/Al ratio of 15 or greater; an I.sub.2 or Br.sub.2 carrier including the I.sub.2 or Br.sub.2 adsorbent; a column filled with the I.sub.2 or Br.sub.2 adsorbent; a article composed of the I.sub.2 or Br.sub.2 adsorbent or having the I.sub.2 or Br.sub.2 adsorbent attached thereto; a method for adsorbing or removing I.sub.2 or Br.sub.2 using the I.sub.2 or Br.sub.2 adsorbent; an iodine- or bromine-containing zeolite composite including a porous zeolite and iodine (I.sub.2) or bromine (Br.sub.2) confined in the pores of the zeolite; a semiconductor material including the iodine- or bromine-containing zeolite composite; and a method for preparing an iodine- or bromine-containing product using the iodine- or bromine-containing zeolite composite.

A process produces salt by way of strong brine concentration after sea water desalination by using a two-way circulation method and bromine extraction. The process includes the following steps: A, preparing fresh water and strong brine from sea water in a high-pressure reverse osmosis unit by using a reverse osmosis method, wherein the concentration of the prepared strong brine is 70000 to 80000 PPM; and B, performing fresh and concentrated separation on the strong brine with the concentration of 70000 to 80000 PPM in a two-way circulation manner by using a concentration difference method till the strong brine is crystallized.

A process includes supplying a bromide brine and removing organic compounds from the bromide brine. The method also includes acidifying the bromide brine to form a stream containing hydrobromic acid and separating the hydrobromic acid from the stream containing hydrobromic acid.