TH45547B - Process for producing naphthalene sulfonate Formaldehyde Condensate - Google Patents

Abstract

DC60 (19/12/55) The invention provides a process capable of producing naphthalene sulfonate soluble salts. Formaldehyde Condensate (naphthalenesulfonate formaldehyde condensate) with reduced content Of non-reactive formaldehyde When naphthalene sulfonic acid is brought into the distillation reaction with Formaldehyde to produce naphthalene sulfonate Formaldehyde Condensate, adding sulfite to the system Reaction after the end of the condensing reaction When the mixture allows the cement to be dispersed, the process Including the condensate process to neutralize The invention provides a process capable of producing naphthalene sulfonate soluble salts. Formaldehyde Condensate with reduced amounts of non-reactive formaldehyde when naphthalene sulfonic The acid was introduced into the distillation reaction with formaldehyde to produce naphthalene, sulfonate, formaldehyde condensate, adding sulfite to the system. Reaction after the end of the condensing reaction When making a mixture to help the cement disperse, the process including the condensate is neutralized.

Claims (1)

1.Process for producing naphthalene sulfonate Formaldehyde condensate, which is composed of a distillation process (I) of the distillation that reacts naphthalene sulfonic acid with phosphate Formaldehyde, (II) step of the addition of sulphate into a reaction system consisting of condensate This was achieved during the distillation reaction (I), and (III) of the removal of insoluble materials from Reaction System (II) 2. Process for producing naphthalene sulfonate soluble salts. Formaldehyde condensate, which consists of a condensing (I) procedure of the reacted condensation. Naphthalene Sulfonyl Acid vs formaldehyde, (II) step of the addition of sulfites in the reaction system where It consists of condensate obtained in the distillation process (I), and (III) of the removal of insoluble materials from the reaction system in step (II), by condensation. Neutralize This process is carried out after the distillation reaction (I). 3. The process according to claim 1 or 2, where sulfite is the divalent metal salt. Was added in an amount of 0.5 to 5 mol per mol of non-reactive formaldehyde. 5. Naphthalene Sulfonate. Formaldehyde condensates or salts of those substances that are soluble, which can be made by the process of Clause 1 6. Naphthalene Sulfonate Formaldehyde, condensate or salts of those substances that are soluble, which can be made by the process of Clause 2 7. Cement dispersant containing salts Water soluble naphthalene, sulfonate, formaldehyde Condensate according to claim 5. 8. Cement dispersant containing soluble salts of naphthalene, sulfonate, formaldehyde. Condensate according to claim 6 9. Dispersant cementite containing naphthalene, sulfonate, formaldehyde condensate containing a Formaldehyde content of 110 mg / kg or less and an average molecular weight of 10000 or more, or salts of those substances that are soluble 1 0. Combined with cement, water and cement dispersant. Of Clause 7 to 9, any of the above 1 1. Process for producing cementitious dispersant, which consists of a process Distillation reaction (I) of the distillation reaction with naphthalene sulfonic. Acid and formaldehyde, the (II) step of the addition of sulfite into a condensate-containing reaction system that results in The distillation process (I), and step (III) of the removal of insoluble materials from the reaction system in step (II), by neutralizing the condensate, was performed after the straining reaction step. Body (I)