Patents by Inventor Loreno Lorenzoni

Loreno Lorenzoni has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8575413
    Abstract: The invention relates to a process for the alkylation of benzene with isopropanol (IPA) as alkylating agent, or blends of isopropanol and propylene, which comprises effecting said reaction completely in gaseous phase and in the presence of a catalytic system containing a zeolite belonging to the MTW family.
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: November 5, 2013
    Assignee: Polimeri Europa S.p.A.
    Inventors: Loreno Lorenzoni, Paolo Calaresu, Pier Gianni Cabras
  • Publication number: 20110218366
    Abstract: The invention relates to a process for the alkylation of benzene with isopropanol (IPA) as alkylating agent, or blends of isopropanol and propylene, which comprises effecting said reaction completely in gaseous phase and in the presence of a catalytic system containing a zeolite belonging to the MTW family.
    Type: Application
    Filed: September 7, 2009
    Publication date: September 8, 2011
    Applicant: POLIMERI EUROPA S.P.A.
    Inventors: Loreno Lorenzoni, Paolo Calaresu, Pier Gianni Cabras
  • Patent number: 5456806
    Abstract: A procedure for the recovery of phenol from its mixtures containing cumene and alpha-methylstyrene, is based on the extractive distillation of the mixtures with acetophenone.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: October 10, 1995
    Assignee: Enichem S.p.A.
    Inventors: Loreno Lorenzoni, Giuseppe Messina, Slavatore Simula
  • Patent number: 5262016
    Abstract: A stream of raw phenol, coming from the acidic cracking of cumene hydroperoxide, is purified by a process of extractive distillation carried out in the presence of acetophenone.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: November 16, 1993
    Assignee: Enimont Anic S.r.l.
    Inventors: Loreno Lorenzoni, Salvatore Simula, Giuseppe Messina, Vittorio Bruzzi
  • Patent number: 5149872
    Abstract: A new process for preparing oxalyl- and oxamyl-hydrazides which comprises contacting oxamide or diacetyloxamide with the corresponding hydrazine derivative of formulaR.sub.1 R.sub.2 N--NHR.sub.3wherein R.sub.1 represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl, aryl, or aryl-alkyl group, R.sub.2 is a hydrogen atom or an optionally substituted alkyl group, or R.sub.1 and R.sub.2 taken together with the adjacent nitrogen atom represent a saturated heterocyclic ring, and R.sub.3 is a hydrogen atom or an optionally substituted alkyl group.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: September 22, 1992
    Assignee: Enichem Anic S.p.A.
    Inventors: Giuseppe Messina, Loreno Lorenzoni, Paolo Calaresu, Giovanni M. Sechi
  • Patent number: 5098525
    Abstract: The disposal of chlorinated pitches is carried out by a process which employs two treatments with an alcohol, which are carried out in cascade.Such treatments cause the precipitation of the suspended matter to take place. This is then caused to settle, and is separated and pyrolized, while the supernatant is distilled in order to separate the alcohol, which is recycled back to the process, from other organic components, which are sent to further uses.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: March 24, 1992
    Assignee: Enichem Anic, S.p.A.
    Inventors: Loreno Lorenzoni, Giuseppe Messina, Vittorio Bruzzi, Salvatore Simula
  • Patent number: 5068429
    Abstract: A method of removing copper from oxamide obtained through a process which involves the use of copper catalysts, by contacting it with an aqueous solution of a suitable complexing agent, which is capable of forming copper-containing water-soluble complexes and imparts to the aqueous solution a pH comprised between 2 and 8, optionally repeating the contacting step and, finally, recovering the purified oxamide by solid-liquid separation techniques.The claimed process affords oxamide containing less than 25 ppm of copper.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: November 26, 1991
    Assignee: Enichem Anic S.p.A.
    Inventors: Loreno Lorenzoni, Nino Dessantis, Angelo Virdis
  • Patent number: 5047587
    Abstract: A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40.degree. to 150.degree. C.
    Type: Grant
    Filed: December 8, 1987
    Date of Patent: September 10, 1991
    Assignee: Enichem Anic S.p.A.
    Inventors: Loreno Lorenzoni, Giuseppe Messina, Vittorio Bruzzi
  • Patent number: 5026866
    Abstract: The present invention relates to a new method of synthesis of 2,2'-bis.DELTA..sup.2 -oxazoline, which consists of three steps:in the first step,N,N'-bis-(2-hydroxyethyl)-oxamide (I) is reacted with hydrogen chloride and a nitrile of formula RCN in which R.dbd.H, alkyl, aryl, arylalkyl, alkylaryl, in order to yield the correspondingN,N'-bis-(2-iminoacyloxyethyl)oxamide.2HCl (II).In the second step, the compound (II) is pyrolyzed in order to yieldN,N'-bis-(2-chloroethyl)oxamide (III) which in the third step generates, by means of the treatment with a base, the desired product 2,2'-bis-.DELTA..sup.2 -oxazoline.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: June 25, 1991
    Assignee: Enichem Anic S.p.A.
    Inventors: Giuseppe Messina, Loreno Lorenzoni, Giovanna Chessa
  • Patent number: 5017721
    Abstract: A new process for preparing oxalyl- and oxamyl-hydrazides which comprises contacting oxamide or diacetyloxamide with the corresponding hydrazine derivative of formulaR.sub.1 R.sub.2 N--NHR.sub.3wherein R.sub.1 represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl, aryl, or aryl-alkyl group, R.sub.2 is a hydrogen atom or an optionally substituted alkyl group, or R.sub.1 and R.sub.2 taken together with the adjacent nitrogen atom represent a saturated heterocyclic ring, and R.sub.3 is a hydrogen atom or an optionally substituted alkyl group.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: May 21, 1991
    Assignee: Enichim ANIC S.p.A.
    Inventors: Giuseppe Messina, Loreno Lorenzoni, Paolo Calaresu, Giovanni M. Sechi
  • Patent number: 4981963
    Abstract: A new process is described for the preparation of oxalic acid esters and amides of general formula (I) ##STR1## wherein Z designates an --OR or --NR.sup.1 R.sup.2 group, wherein R represents substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, R.sup.1 is hydrogen or substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, R.sup.2 represents substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, or R.sup.1 and R.sup.2 taken together with the adjacent nitrogen atom represent a saturated 5-, 6-, 7-, or 8-membered heterocyclic ring, which may contain an additional heteroatom selected from --O--, --S--, and --N(H, Alkyl)--, and optionally bear one or more alkyl or alkenyl substituents, andZ.sup.1 designates an --OR or --NR.sup.1 R.sup.2 group, wherein R, R.sup.1, and R.sup.2 are as defined before, or a group --NHCOCH.sub.3, which comprises the base-catalysed reaction of diacetyloxamide with an alcohol ROH or/and an amine HNR.sup.1 R.sup.2.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: January 1, 1991
    Assignee: Enichem Anic S.p.A.
    Inventors: Giuseppe Messina, Giovanni M. Sechi, Loreno Lorenzoni, Giovanni Chessa
  • Patent number: 4978786
    Abstract: A process is described for the preparation of oxamide derivatives wherein one or both --NH.sub.2 groups are replaced by primary or secondary amino groups, through reaction of oxamide with a suitably selected amine of formula RR.sup.1 NH wherein R represents a substituted straight or branched (C.sub.2 -C.sub.12)alkyl radical wherein the substituent(s) or at least one of the substituents is selected from the group consisting of hydroxy, amino, mono-substituted amino, and di-substituted amino, and R.sup.1 represents hydrogen or an optionally substituted (C.sub.1 -C.sub.6)alkyl radical; representative oxamide derivatives which can thus be obtained useful as corrosion inhibitors, intermediates for polymers, polymer stabilizers, and slow-release fertilizers, are also described.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: December 18, 1990
    Assignee: Enichem Anic S.p.A.
    Inventors: Giuseppe Messina, Giovanni Sechi, Loreno Lorenzoni, Vittorio Bruzzi
  • Patent number: 4954660
    Abstract: Linear olefins are converted into the corresponding secondary alcohols by treatment with methyl alcohol and a tertiary alcohol, in the presence of an acidic catalyst, at a temperature ranging from 120.degree. to 200.degree. C. The product mixture substantially consists of the desired secondary alcohol and of the methyl ether of the charged tertiary alcohol.The reaction products can be easily isolated by fractionation, or, in some instances, the liquid product mixture can be used as such.Of particular interest is the direct hydration of n-butenes using tert-butyl alcohol as the tertiary alcohol. The obtained product mixture can be used as such, as an additive to methanol-containing gasolines for internal combustion engines.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: September 4, 1990
    Assignee: Enichem Anic S.p.A.
    Inventors: Giuseppe Messina, Carmelo Nurra, Oscar Cappellazzo, Angelo Virdis, Loreno Lorenzoni
  • Patent number: 4945161
    Abstract: A new process for preparing N,N'-bis-(2-hydroxyethyl)-piperazine (I) ##STR1## is described which involves reaction of oxamide with excess diethanolamine at a temperature of from 50.degree. to 268.degree. C.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: July 31, 1990
    Assignee: Enichem Anic S.p.A.
    Inventors: Giuseppe Messina, Paolo Calaresu, Loreno Lorenzoni
  • Patent number: 4439570
    Abstract: Substantially colorless, liquid compositions are described which are constituted by a phenolic antioxidant, or mixture of phenolic antioxidants, and at least one phosphine, the compositions being highly resistant to coloration phenomena.These compositions are effective stabilizers for organic polymers and, when incorporated in the said polymers, have a stabilizing power which is greater than that shown by the phenolic antioxidant or mixture of phenolic antioxidants alone.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: March 27, 1984
    Assignee: Euteco Impianti S.p.A.
    Inventors: Giuseppe Messina, Loreno Lorenzoni, Antonio L. Fadda
  • Patent number: 4374280
    Abstract: A process for the preparation of dicumyl peroxide by reaction of dimethylbenzyl hydroperoxide (cumene hydroperoxide) with dimethyl phenyl carbinol in the presence of a catalytic quantity of a phosphorous halide or oxyhalide is described. This catalyst gives good yields of the useful reaction product and a high selectivity.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: February 15, 1983
    Assignee: Euteco Impianti S.p.A.
    Inventors: Giuseppe Messina, Mario D. Moretti, Loreno Lorenzoni
  • Patent number: 4374279
    Abstract: A process for the preparation of dicumyl peroxide by reaction of dimethylbenzyl hydroperoxide (cumene hydroperoxide) with methyl cumyl ether is described. The reaction is carried out in the presence of a catalytic quantity of Lewis or Bronsted acids, the methanol which forms as a by-product being removed as the reaction proceeds. Furthermore, the reaction is carried out in a reaction medium consisting of the methyl cumyl ether itself, which is employed in quantities greater than the stoichiometric quantity required for the reaction with the cumene hydroperoxide.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: February 15, 1983
    Assignee: Euteco Impianti S.p.A.
    Inventors: Giuseppe Messina, Mario D. Moretti, Loreno Lorenzoni
  • Patent number: 4216345
    Abstract: Process for the preparation of alkylbenzenes by partial chlorination of linear C.sub.9 -C.sub.15 paraffins, catalytic alkylation of benzene with the resulting mixture and fractionation by distillation of the alkylation products.At least a part of the unreacted paraffins recovered by fractionation and to be recycled to the chlorination stage is submitted, continuously or intermittently, to a purification treatment with molecular sieves.The content in undesired by-products of the alkylbenzenes can thus be maintained at negligibly low values.
    Type: Grant
    Filed: September 28, 1978
    Date of Patent: August 5, 1980
    Assignee: Euteco S.p.A.
    Inventors: Giuseppe Messina, Loreno Lorenzoni, Lucio Di Fiore