Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
  • B08B3/04—Cleaning involving contact with liquid
  • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/34—Organic compounds containing sulfur
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
  • B08B3/02—Cleaning by the force of jets or sprays
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/34—Organic compounds containing sulfur
  • C11D3/3409—Alkyl -, alkenyl -, cycloalkyl - or terpene sulfates or sulfonates
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
  • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions

Definitions

• the present invention relates to the field of sugar industries, and more particularly the cleaning of installations, including reactors, evaporators, containers, valves, pipes, pipes and others, used in the manufacture of sugar from natural plant materials, such as for example sugar cane or sugar beet.
• Aconitic acid is equivalent to dehydrated citric acid and is predominantly in trans form in cane and beet sugar.
• Aconitic acid is found mainly in the form of tri-calcium salts and di-calcium and magnesium mixed salts, which are not available commercially.
• EDTA is now considered to pose risks to the environment, especially the aquatic environment, when it is used as a raw material for detergents.
• biodegradability of EDTA is less than 10% (cf. European Union Risk Assessment Report, edetic acid (EDTA), PL-1, 49, (2004) )).
• hydrochloric acid (HCl) nevertheless has many drawbacks, among which mention may be made of the release of toxic, nauseating, irritating and tear vapors, as well as the problems of effluents due to the large quantities of chlorides discharged into the environment.
• the concentration of HCl is limited to about 37%, whereas it could be interesting, even desirable to have much higher acid concentrations to eliminate in particular all the deposits which accumulate during the preparation of the sugar.
• Sulfuric acid is little used industrially, especially because of its corrosive nature. Similarly, sulphamic acid, whose releases are considered harmful to the environment, especially for aquatic organisms, is not an acid that can be widely used on an industrial scale.
• WO 2008/144501 A2 describes a method of cleaning the residues of etching compositions comprising the use of a solution containing at least one C1-C6 alkylsulfonic acid.
• a suitable formulation appears to be a formulation containing 13% sodium hydroxide, 10% EDTA and 2% sodium gluconate.
• EDTA is not a product that can continue to be used, especially for the reasons mentioned above.
• a first object of the present invention is to provide products and formulations that are effective for the dissolution of the salts of aconitic acid in particular, and more generally, processes for cleaning deposits encountered in sugar-making installations, in particular particularly in the sugar industries.
• Another object of the present invention is to provide an effective alternative to the acids commonly used in this application while avoiding discharges and effluents harmful to the environment, as well as toxic and nauseating gas emissions.
• cleaning is understood to mean the elimination and / or dissolution of deposits comprising at least one salt of aconitic acid, preferably a calcium salt and / or magnesium, this elimination may be partial or total, preferably total, without the aforementioned drawbacks, in particular the disadvantages on the environment, the disadvantages of gaseous releases and others, as will be described now.
• the formulations based on at least one alkane-sulphonic acid have, in particular, an efficacy at least equal to, or even improved, with respect to the hydrochloric acid which is the acid usually used in this field, or even with respect to the salts of the ethylenediaminetetraacetic acid (EDTA).
• EDTA ethylenediaminetetraacetic acid
• the alkane-sulphonic acids have the advantage of being less corrosive than hydrochloric acid, of not generating chlorides, of being biodegradable and of not giving off toxic or foul-smelling products, as well as of to be less polluting than phosphoric acid, because of the phosphates released into the environment.
• the alkanesulfonic acids can be used in more than concentrated form than hydrochloric acid.
• the use of the present invention finds applications quite interesting in industries employing at least one step of evaporation of water from a mixture comprising at least one aconitic acid salt capable of deposit, and in particular during the manufacture of sugar from natural plant materials, such as for example sugar cane or sugar beet.
• formulations based on (s) alkane-sulfonic acid (s) have in particular a greater ease of use and handling compared to products and formulations usually used for cleaning solid deposits comprising salts of aconitic acid.
• the use of formulations based on alkane-sulfonic acid (s) produces no or few toxic, irritating or tear gas emissions.
• the present invention relates to the use of at least one alkanesulphonic acid of formula R-SO 3 H, where R represents a saturated hydrocarbon chain, linear or branched, comprising from 1 to 4 atoms of carbon, for cleaning solid deposits comprising at least one salt of aconitic acid.
• this type of solid deposition is usually encountered in industries employing at least one step of evaporation of water from a mixture comprising at least one salt of aconitic acid capable of depositing, and in particular during the manufacture of sugar from natural plant materials, such as for example sugar cane or sugar beet.
• the invention relates to the use of at least one alkane-sulphonic acid as an active compound for cleaning solid deposits comprising at least one aconitic acid salt, said solid deposits being usually encountered in industries employing at least one step of evaporation of water from a mixture comprising at least one salt of aconitic acid capable of depositing, and in particular during the manufacture of sugar from natural plant materials, such as for example the cane sugar or sugar beet.
• the invention relates to the use of at least one alkanesulphonic acid for cleaning surfaces soiled by solid deposits comprising at least one aconitic acid salt, on all types of surfaces.
• the present invention provides a formulation, able in particular to replace the use of hydrochloric acid, for cleaning deposits comprising at least one salt of aconitic acid, or more simply "aconitates" in the rest of this exposed, said formulation comprising at least one alkanesulfonic acid which is a biodegradable acid, low toxicity, not releasing or little irritating or tear gas, not generating effluents harmful to the environment and can be used in form more concentrated as hydrochloric acid.
• the aconitates, and in particular the aconitates encountered in the sugar industry are well known to those skilled in the art and lead, especially after many cycles of evaporation of aqueous sugar solutions, to solid deposits, more or less compact.
• the aconitates encountered are mainly aconitates of calcium and / or magnesium, and may be present in solid deposits in combination with other salts.
• other salts such as carbonates, such as calcium carbonate, phosphates, such as tricalcium phosphate, hydroxyapatite, oxalates, such as calcium oxalate, sulphates, such as calcium sulphate, iron oxides, and others.
• the use of the present invention allows the cleaning of aconitates, and more generally deposits comprising at least one aconitate, and which may be present on all types of surfaces, in particular hard surfaces, especially metallic surfaces (iron, aluminum, steel and the like). ), wood, polymers (plastics, paints, lacquers, varnishes), glasses, stones, ceramics, porcelains, terracotta, and others.
• cleaning is understood to mean the cleaning, stripping, of all types of surfaces, as indicated above, soiled, coated, covered, in whole or in part by residues, scales, deposits , dry or still wet, generated during the preparation of products obtained from plants and in particular from sugar cane or sugar beet, by elimination, dissolution, said residues, scales and deposits in general.
• cleaning also includes the partial or total elimination of solid deposits, comprising at least one aconitate, and which may have taken up unexpectedly, undesirably or undesirably in the installations.
• reactors, evaporators, containers, valves, pipes, pipes and the like used in the manufacture of sugar from natural plant materials, such as, for example, sugar cane or sugar beet, which are usually removed / removed by other chemical and / or mechanical means, such as brushes, trowels, shovels, pickaxes, hammers, jackhammers and others.
• alkane-sulphonic acid is understood to mean alkanesulphonic acids of formula R-SO 3 H, where R represents a linear or branched saturated hydrocarbon-based chain containing from 1 to 4 carbon atoms.
• alkane-sulphonic acids that can be used in the context of the present invention are preferably chosen from methanesulfonic acid, ethanesulfonic acid, n-propanesulfonic acid, iso- propanesulfonic acid, n-butanesulfonic acid, iso- butanesulfonic acid, sec- butanesulfonic acid, tert- butanesulfonic acid, and mixtures of two or more of them in all proportions.
• the alkane-sulphonic acid used in the context of the present invention is methanesulfonic acid or ethanesulphonic acid, and the acid used is preferably the acid. methanesulfonic.
• the use according to the present invention uses at least one alkane-sulphonic acid chosen from linear or branched chain alkane sulphonic acids containing from 1 to 4 carbon atoms, and preferably at least methane acid.
• alkane-sulphonic acid chosen from linear or branched chain alkane sulphonic acids containing from 1 to 4 carbon atoms, and preferably at least methane acid.
• AMS sulfonic
• Said at least one alkane-sulphonic acid that can be used in the context of the present invention can be used as it is, or in combination with one or more other components, that is to say in formulation.
• Any type of formulation comprising at least one alkanesulphonic acid may be suitable.
• the formulation comprises from 0.01% to 100% by weight of alkanesulfonic acid, more generally from 0.05% to 90% by weight, in particular from 0.5% to 75% by weight, inclusive limits, of alkane-sulfonic acid (s), relative to the total weight of said formulation.
• the formulation is, for example, an aqueous, organic or even hydro-organic formulation.
• the formulation may be prepared as a concentrated mixture, wherein the concentrated mixture may be diluted by the end user.
• the formulation may also be a ready-to-use formulation, i.e., it does not need to be diluted.
• the formulation may be a pure alkanesulfonic acid, or a mixture of pure alkanesulphonic acids, that is to say that the formulation may contain only one or more acids. -sulfonic, with no other formulation additive or other solvent or diluent.
• the concentration of alkane-sulfonic acid (s) in the formulation depends on many factors, among which may be mentioned the amount of deposits to be cleaned, the nature and shape of the surface to be cleaned, the temperature to which is applied formulation, and others. Those skilled in the art will be able to adapt, without undue effort, the appropriate concentration of acid in the formulation.
• Concentrated solutions for example from 60% to 100%, preferably from approximately 70% to 100% by weight of alkane-sulphonic acid (s), are thus preferred, relative to the total weight of said formulation, when it is desired to remove large amounts of deposits, or on the surface of materials that are not very sensitive to acid attacks. Less concentrated solutions of 0.01% to 60%, preferably 0.05% are preferred. at 50% for smaller quantities of deposits to be removed, or for the cleaning of deposits still wet, and / or on surfaces sensitive to acid attacks.
• methanesulfonic acid in aqueous solution sold by Arkema under the name Scaleva®, or else under the name Lutropur® marketed by BASF, ready-to-use or diluted with water. in the proportions indicated above.
• the formulation in aqueous form is particularly advantageous in the so-called “cleaning in place” (or “cleaning in place” or “CIP” in English language) processes.
• alkanesulfonic acid in particular methanesulfonic acid
• s alkanesulfonic acid
• This control of the acid content can be achieved by any method known per se, and for example by conductivity.
• the formulation is a formulation in the form of a gel. It has indeed been observed that the formulations in the form of alkane-sulfonic acid (s) gel (s) are very effective for the removal of deposits comprising aconitates, as described above, not only because of the gel itself. even which allows a longer action of the acidic active principle (the gel "adheres" longer to the surfaces, compared to an aqueous formulation), but also has an improved cleaning power, compared to other gel formulations.
• s alkane-sulfonic acid
• the gelling agents and the surfactants that can be used in the formulations in the form of a gel can be of any type.
• the person skilled in the art will know, without particular difficulty and drawing inspiration from the examples which follow, to choose and adapt the nature of the gelling agents and the appropriate surfactants.
• the present invention relates to the use of a foaming gel formulation.
• Foaming gels are indeed everything particularly interesting because they produce a sticky foam, that is to say a foam adhering to soiled surfaces, while generally requiring a lower consumption of cleaning acid active ingredient, and have the advantage of being rinsed quite well effective, that is to say to be eliminated in a simpler and more efficient way, while requiring less water.
• the formulation may be prepared as a concentrate, and then diluted before use until the expected efficiency, viscosity and foaming power.
• At least one ethoxylated amine oxide such as, without limitation, Cecajel® OX100 from CECA, or Aromox® T12 from Akzo alone or combination with at least one dimethylalkylamine oxide allows to bring stability to the foaming gel.
• Foaming agents and in particular those described above, generally form gels when they are mixed with water, that is to say they increase the viscosity of the formulation, without it being necessary. to add a gelling agent.
• a gelling agent generally form gels when they are mixed with water, that is to say they increase the viscosity of the formulation, without it being necessary.
• the addition of such a gelling agent is not excluded from the present invention.
• solubilizing or hydrotropic agents that may be used in the formulations according to the invention, mention may be made, for example and without limitation, of sodium xylene or cumene sulfonates. Such agents are however not essential in the acidic formulations according to the invention.
• An aqueous, organic or hydro-organic formulation in the form of a solution, a gel or in the form of a foaming gel, which is particularly preferred, is a formulation comprising from 0.01% to 95%, preferably from 0.05% to 75% more preferably from 0.5% to 50% by weight of methanesulfonic acid.
• formulations used according to the present invention may be applied according to any method known to those skilled in the art, and in particular under pressure, or using a spray gun.
• the concentration of alkane-sulfonic acid (s) can thus vary in very large proportions, depending on the nature and the quantity of residues to be removed, but also according to the nature of the surfaces to be cleaned.
• the invention also relates to a solid deposition cleaning method comprising at least one salt of aconitic acid, which deposit of aconitate can be encountered in all types of industries employing at least one step of evaporation of the water of a mixture comprising at least one salt of aconitic acid capable of depositing, and in particular in the sugar-making industries from natural plant materials, such as, for example, sugar cane or sugar beet.
• the present invention relates to a method for cleaning (ie solubilizing and / or eliminating), at least partial and preferably total, solid deposition comprising at least one aconitic acid salt, whether it is in wet or dried form, for example taken in bulk, and present on all types of surfaces, in particular hard surfaces, in particular metallic surfaces (iron, aluminum, steels and the like). ), wood, polymers (plastics, paints, lacquers, varnishes), glasses, stones, ceramics, porcelains, terracotta, and others.
• the present invention relates to a process for removing deposits comprising at least one aconitic acid salt, as defined above, present for example on all types of surfaces, as indicated above, stained, coated, covered, in totality. or in part by residues, scales, deposits, dry or wet, generated during the preparation of products obtained from plants and in particular from sugar cane or sugar beet.
• the process of the present invention comprises at least one step of contacting an effective amount of at least one alkanesulfonic acid, as defined above, preferably methanesulfonic acid, in the form of a formulation.
• aqueous, organic or hydro-organic in the form of a solution, gel or foaming gel, as just described, with a solid deposit comprising at least aconitic acid to be removed, by contact, immersion, spraying spraying, applying a more or less thick layer, possibly using appropriate tools known to those skilled in the art (brushes, brushes, spatulas, and others), said contacting step possibly being followed by one or more rinsing and / or drying steps.
• the temperature at which the process is carried out, and in particular the step of contacting can vary in large proportions and is generally between -20 ° C. and + 150 ° C., preferably between 0 ° C. and 80 ° C. C, more preferably between 10 ° C and 80 ° C. According to a preferred embodiment, the use temperature is the ambient temperature or a temperature between room temperature and about 80 ° C.
• this temperature may be identical or different, or to bring to temperature either the alkanesulfonic acid or the surface to be treated.
• the cleaned surface can be, if necessary and if necessary, dried, according to any known method of the those skilled in the art, for example in the air, under a current of air more or less hot, in an oven, by heating (electric, heat lamps), wiping (paper or absorbent textiles), and others.
• the alkanesulfonic acid is advantageously used in the form of a formulation, for example an aqueous, organic or hydro-organic formulation, in liquid form, of a gel or of a foaming gel, as defined above.
• effective amount means an amount for cleaning residues, scales, and generally solid deposits comprising at least one aconitic acid salt.
• This amount can vary in large proportions, depending on the surfaces to be treated and the amount of solid deposits, the temperature and pressure of the formulation used, the desired duration of the cleaning process, and others.
• the amount of acid will be advantageously established to allow complete, or as complete as possible, cleaning of the solid deposits of aconitates, while using a minimal amount of acid (s), essentially for economic reasons.
• This cleaning operation of solid deposits of aconitates can be repeated once or more depending on the amount and nature of the solid deposits, and their degree of incrustation on the surfaces to be treated.
• reaction time necessary for the dissolution of the solid deposits which it is desired to eliminate, this reaction time varying from a few seconds to a few hours, or even a few days, depending on the temperature at which the cleaning is carried out, the application pressure of the alkane-sulphonic acid (s), the nature of the formulation comprising the said at least one alkane-sulphonic acid; , the quantity of deposits to be removed, their degree of incrustation, as well as the nature of the surfaces to be treated.
• the treatment with at least one alkane-sulphonic acid as just defined can optionally be accompanied and / or preceded, and / or followed by one or more washes, and preferably preceded by one or more prewashes, if necessary, using a basic formulation comprising at least one mineral or organic base, preferably a mineral base, for example an alkali or alkaline earth metal hydroxide, for example sodium hydroxide, in all concentrations.
• These basic washes are quite preferably carried out before, or after, or before and after, but preferably not simultaneously with the cleaning with said at least one alkanesulfonic acid, in order to avoid the acid / neutralization reactions. which could adversely affect the quality of the cleaning sought.
• the treatment with at least one alkane-sulphonic acid as just defined may optionally be accompanied and / or followed by one or more mechanical operations (stirring, scraping, brushing, and the like), in order to improve acidic chemical action, if necessary.
• the treatment may be followed by one or more rinsing operations, for example with clear water, solvent (s) or mixture (s) water / solvent (s).
• the term "effective amount” means an amount allowing the dissolution and elimination of all or part of dirt, residue, scales, dry or not, deposits solids comprising at least one aconitic acid salt.
• This quantity can vary in large proportions, depending on the surfaces to be treated and the amount of solid deposits, the temperature, the pressure of the formulation used, the nature of the formulation used, the desired duration of the removal process and the like.
• the amount of acid will advantageously be adjusted to allow a total or at least partial, preferably total, elimination of residues, scales, dried or not, of said solid deposits of aconitates, while observing a minimal amount of acid ( s), mainly for economic reasons.
• Alkanesulphonic acids especially methanesulfonic acid
• methanesulfonic acid have been shown to be effective in cleaning solid deposits of aconitates, especially solid deposits encountered in the sugar-making industry, particularly from sugar cane. or sugar beet without generating irritating and tear gas emissions.
• the use of at least one alkane-sulfonic acid according to the present invention has the advantage of generating little or no corrosion, especially during the cleaning of metal surfaces (many in particular in the sugar industries) , corrosion which is frequently observed on said metal surfaces when using solutions more or less concentrated in acids.
• alkane-sulphonic acids can also be used at high concentrations, in order to increase their effectiveness, which concentrations can be 50%, 70% or even 100% by weight, whereas the maximum concentration of hydrochloric acid can not be less than only 37%, due to the intrinsic chemical nature of this acid.
• alkane-sulfonic acids used in the present invention have, compared to arylsulfonic acids, the advantage of generating a lower chemical oxygen demand (COD) at the effluent treatment stations, and consequently allow a greater higher concentration of organic discharges in said stations.
• COD chemical oxygen demand
• the formulations that may be used in the context of the present invention may contain phosphorus compounds, such as, for example, phosphates, originating, for example, from phosphoric acid, but in small proportions, for example less than 10% by weight, preferably less than 10% by weight. 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation, always with the aim of minimizing as much as possible the discharges harmful to the environment.
• phosphorus compounds such as, for example, phosphates, originating, for example, from phosphoric acid, but in small proportions, for example less than 10% by weight, preferably less than 10% by weight. 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation, always with the aim of minimizing as much as possible the discharges harmful to the environment.
• formulations that may be used in the context of the present invention may contain sulfur-containing compounds, such as, for example, sulphates, originating, for example, from sulfuric acid, but in small proportions, for example less than 10% by weight, of preferably less than 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation.
• sulfur-containing compounds such as, for example, sulphates, originating, for example, from sulfuric acid, but in small proportions, for example less than 10% by weight, of preferably less than 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation.
• the formulations that may be used in the context of the present invention may contain chlorinated compounds, such as, for example, chlorides, originating, for example, from hydrochloric acid, but in small proportions, for example less than 10% by weight, preferably less than 10% by weight. 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation.
• chlorinated compounds such as, for example, chlorides, originating, for example, from hydrochloric acid, but in small proportions, for example less than 10% by weight, preferably less than 10% by weight. 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation.
• the formulations that may be used in the context of the present invention may contain nitrogen compounds, such as, for example, nitrates, originating, for example, from nitric acid, but in small proportions, for example less than 10% by weight, preferably less than 10% by weight. 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation.
• nitrogen compounds such as, for example, nitrates, originating, for example, from nitric acid, but in small proportions, for example less than 10% by weight, preferably less than 10% by weight. 5% by weight, more preferably less than 1% by weight, relative to the total weight of the formulation.
• the present invention described above shows that it is possible to eliminate solid deposits of aconitates on all types of surfaces, such as, and without limitation, metal surfaces (iron, steel, copper, alloys, and the like). ), concrete, cement, tiles, porcelain, wood, paper, cardboard, textiles, polymers (plastics, varnishes, paints, lacquers), glasses, and others.
• metal surfaces iron, steel, copper, alloys, and the like.
• the present invention also shows that it is possible to clean said surfaces of residues, dried or unwanted, undesirable, but also to remove solid deposits that may have accumulated in various containers, evaporators, ducts, valves, and others, and which are usually removed by acids which are not very respectful of the environment and / or which are corrosive with respect to the surfaces to be treated.
• alkane-sulfonic acids can advantageously be used as a replacement for the acids that are commonly known and used by those skilled in the art for the removal of solid deposits of aconitates, in a large number of fields of application, among which mention, in a non-limiting way, the sugar industries.
• alkane sulfonic acids used in the context of the present invention can be effective for cleaning any type of soiling, such as rust, scale, but also all types of organic fouling inherent in the manufacture of sugar especially from as indicated previously.
• a calcium salt of aconitic acid is first prepared and then dissolution tests are carried out.
• the solution is then heated to 85 ° C., and then 228.5 ml of a 0.3M calcium chloride solution whose pH has been adjusted beforehand to 6 with 1N HCl are added.
• reaction medium is heated for 3 hours at 85 ° C. and a precipitate then appears, the medium is then filtered while hot. 10.6 g of a solid which is washed 3 times with 30 ml of hot water are recovered.
• Table 1 summarizes the dissolution results of tricalcium aconitate trihydrate at 20 ° C. ⁇ u> - ⁇ b> ⁇ i> Table 1 ⁇ / i> ⁇ /b> - ⁇ / u> tested acid % by weight of tricalcium aconitate trihydrate dissolved at room temperature (20 ° C) methanesulfonic acid 12.1% hydrochloric acid 12.1% sulfamic acid 11.9% sulfuric acid ⁇ 2.2%
• Methane sulfonic acid is very inefficient with respect to the solubility of the salts of aconitic acid.
• Methane sulfonic acid surprisingly has an efficiency comparable to that of hydrochloric acid and slightly higher than that of sulfamic acid.
• methanesulfonic acid is much less corrosive than hydrochloric acid, whose vapors are irritating and toxic to the user.
• methanesulfonic acid is biodegradable.
• sulphamic acid whose releases are also considered harmful to the environment, in particular for aquatic organisms, is not an acid that can be widely used on an industrial scale.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• General Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Materials Engineering (AREA)
• Detergent Compositions (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Saccharide Compounds (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=54065981

Family Applications (1)

Country Status (15)

Families Citing this family (5)

Family Cites Families (10)

• 2015
  • 2015-04-21 FR FR1553575A patent/FR3035403B1/fr not_active Expired - Fee Related
• 2016
  • 2016-04-08 CN CN201680023090.3A patent/CN107438659B/zh not_active Expired - Fee Related
  • 2016-04-08 RU RU2017134350A patent/RU2695848C2/ru active
  • 2016-04-08 MX MX2017013143A patent/MX2017013143A/es active IP Right Grant
  • 2016-04-08 BR BR112017022480-1A patent/BR112017022480A2/pt active Search and Examination
  • 2016-04-08 DK DK16733125.5T patent/DK3286354T3/da active
  • 2016-04-08 CA CA2983047A patent/CA2983047C/fr not_active Expired - Fee Related
  • 2016-04-08 WO PCT/FR2016/050812 patent/WO2016170245A1/fr active Application Filing
  • 2016-04-08 PL PL16733125T patent/PL3286354T3/pl unknown
  • 2016-04-08 EP EP16733125.5A patent/EP3286354B1/fr active Active
  • 2016-04-08 ES ES16733125T patent/ES2738698T3/es active Active
  • 2016-04-08 US US15/567,385 patent/US20180093305A1/en not_active Abandoned
  • 2016-04-08 AU AU2016252084A patent/AU2016252084B2/en not_active Ceased
  • 2016-04-20 AR ARP160101078A patent/AR104324A1/es unknown
• 2019
  • 2019-07-29 HR HRP20191362 patent/HRP20191362T1/hr unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events