Processs to obtain random terpolymers derived from itaconic acid, aconitic acid and/or its isomers, and alkenyl sulfonates and use of the product thereof

Abstract

Random terpolymers are characterized for being tolerant to high concentrations of divalent ions, such as calcium, magnesium, strontium and barium, and that for their application in the reservoir or production rig, treated water, sea water and/or connate water can be used as means of transportation. Furthermore, the terpolymer also can be used to inhibit and disperse mineral scales presents in cooling system and boiler employed in the chemical and oil industry.Also, random terpolymers of the present invention have the characteristic of complying with environmental standards established internationally and are classified as particularly non-toxic, so it can be used in pipes and equipment of the petrochemical industry and with the use characteristic freshwater and seawater from offshore and onshore facilities.

1 . A terpolymer, comprising: 
       
         
           
           
               
               
           
         
         wherein R 1 =—H, —CH 3 , R2=—H, —CH 2 COOH, —COOH, R3=—COOH, R4=—CH2COOH, H, R5=—H, R6=—H, R7=—H, —CH3, R8=—SO 3 Na, —CH 2 SO 3 Na, —CONHC(CH3) 2 CH2S03Na, C 6 H 4 SO 3 Na, Rg=H, R 1 0=—COOH, R1 1 =—COOH y R12=—CH 2 COOH and n is between 2 and 70, and wherein the terpolymer is derived from at least one of itaconic acid or isomers, aconitic acid, or alkenylsuiphonates. 
       
     
     
         2 . The terpolymer, according to  claim 1 , wherein the terpolymer is an active agent for inhibiting and dispersing mineral scales of at least one of calcium carbonate, calcium sulphates, barium and strontium and disperse clays, calcium carbonate, calcium sulphates, barium and strontium and iron oxides. 
     
     
         3 . The terpolymer, according to  claim 2 , wherein the terpolymer inhibits and disperses mineral scales present in equipment used in oilfields. 
     
     
         4 . The terpolymer, according to  claim 1 , wherein the terpolymer is administered at high pressure and ultra-high salinity. 
     
     
         5 . The terpolymer, according to  claim 1 , wherein itaconic acid isomers include at least one of cis-glutaconic acid, trans-glutaconic acid, citraconic acid and mesaconic acid. 
     
     
         6 . The terpolymer according to  claim 1 , wherein aconitic acid isomers include at least one of cis-aconitic acid and trans-aconitic acid. 
     
     
         7 . The terpolymer according to  claim 1 , wherein sodium alkyl sulphonates include at least one of vinyl sulfonic acid, allyl sulfonic add, styrene sulfonic add, 2-acrylamido-2-methyl-1-propane sulfonic and salts thereof. 
     
     
         8 . The terpolymer according to  claim 5 , wherein the salts include at least one of sodium or potassium. 
     
     
         9 . The terpolymer, according to  claim 1 , wherein terpolymer chemical structure is a random-type structure. 
     
     
         10 . The terpolymer, according to  claim 1 , wherein the average molecular weight by number is between about 500 AMU and about 31,000 AMU. 
     
     
         11 . A method of inhibiting and dispersing carbonate and calcium sulfate mineral scale, comprising:
 adding a terpolymer to a cooling system or a boiler system,   wherein the terpolymer, comprises:   
       
         
           
           
               
               
           
         
       
       wherein R 1 =—H, —CH 3 , R2=—H, —CH 2 COOH, —COOH, R3=—COOH, R4=—CH2COOH, H, R5=—H, R6=—H, R7=—H, —CH 3 , R8=—SO 3 Na, —CH 2 SO 3 Na, —CONHC(CH 3 ) 2 CH 2 S0 3 Na, C 6 H 4 SO 3 Na, R9=H, R 10 =—COOH, R 11 =—COOH y R12=—CH 2 COOH and n is between 2 and 70. 
     
     
         12 . The method of  claim 11 , wherein the cooling system or the boiler system is used in the chemical or oil industry. 
     
     
         13 . The method of  claim 11 , wherein the method includes adjusting the temperature to an operating temperature of up to about 220° C. 
     
     
         14 . The method of  claim 11 , wherein method includes adjusting the pressure to a pressure of up to about 8000 psi. 
     
     
         15 . The method of  claim 11 , wherein the method includes a brine of salt. 
     
     
         16 . The method of  claim 11 , wherein in the brine salt has a concentration up to about 450,000 ppm. 
     
     
         17 . The method of  claim 11 , wherein in the brine of salt is calcium carbonate having a concentration of about 250,000 ppm as a total hardness. 
     
     
         18 . The method of  claim 11 , wherein the concentration of the terpolymer is between about 1 to about 10.000 ppm. 
     
     
         19 . The method of  claim 11 , wherein the terpolymer is diluted in an aqueous medium. 
     
     
         20 . The method of  claim 11 , wherein the terpolymer meets the Mexican NRF-005-PEMEX-2009 standard for use in at least one of equipment and pipelines that use fresh water and are built on land. 
     
     
         21 . The method of  claim 11 , wherein the equipment or the pipelines are used in at least one of a chemical or an oil industry. 
     
     
         22 . The method of  claim 11 , wherein the terpolymer meets the Mexican NRF-005-PEMEX-2009 standard for use in off shore applications that use sea water or formation water from oil reservoirs.