180 results about "Maleopimaric acid" patented technology

The present invention relates to a ZSM-5 mesoporous molecular sieve catalyst used for manufacturing propylene by methanol and a preparation method thereof, which mainly solves the problems of low propylene selectivity, low propylene / ethylene mass ratio as well as poor thermal stability of molecular sieve and poor water thermal stability in the prior art. The present invention adopts the technical proposal of adopting ZSM-5 mesoporous molecular sieve raw powder with a silicon-aluminum mol ratio SiO2Al2O3 of 20 to 1000 and a weight percentage of 20 to 100 percent as well as at least one caking agent selected from SiO2, clay and Al2O3 to extrude, tablet or spray into shape; then treating for 1 to 8 hours by 0.1 to 3 mol / l of at least one ammonium liquor from ammonium nitrate, ammonium chloride or ammonium sulphate or 0.1 to 8.5 mol / l of at least one acid liquor from muriatic acid, nitric acid, vitriol or acetic acid under a temperature of 20 to 90 DEG C; then using steam to treat for 2 to 15 hours under the temperature condition of 400 to 700 DEG C; using a liquor of 0.1 to 3mol / l selected from at least one of oxalic acid, citric acid or maleic acid under a temperature condition of 20 to 90 DEG C to dip for 2 to 5 hours to obtain the modified molecular sieve catalyst, thus better solving the problems. The present invention can be used in the industrial production of propylene by being converted from methanol.

A semiconductor wafer cleaning formulation for use in semiconductor fabrication comprising maleic acid and ethylene urea as essential components. The preferred formulation comprises maleic acid, ethylene urea, at least one carboxylic acid except maleic acid, at least one organic amine except ethylene urea and water. The formulation can optionally comprise at least one selected from the group consisting of an organic solvent, a chelating agent and a surfactant. The formulation is suitably used for removal of residue from semiconductor wafers following a resist ashing process, particularly for removal of residue from wafers containing delicate copper interconnect and low-k or ultra low-k interlayer dielectrics structures. There is also provided a method for cleaning the wafer by using the formulation.

A liquid detergent builder which is highly compatible with a surfactant and gives transparent liquid detergents having extremely excellent detergency, a liquid detergent containing the builder, and a liquid detergent containing an acrylic acid-based polymer (salt) having excellent clay dispersibility and good compatibility with a surfactant. The liquid detergent builder comprises an acrylic acid / maleic acid-based copolymer (salt), wherein the acrylic acid / maleic acid-based copolymer (salt) contains maleic acid (salt) in an amount of 5-90 mol % per mole of the sum of acrylic acid (salt) and maleic acid (salt), and a product (MA×Mw) of a weight average molecular weight (Mw) of the copolymer (salt) and a proportion (MA (mol %)) of the maleic acid (salt) in the copolymer (salt) is 450,000 or less.

Improved fertilizer compositions are provided, including a solid nitrogenous fertilizer (e.g., urea) together with a polycarboxylated polymeric adjuvant or additive material selected from the group consisting of a salts of copolymers containing individual quantities of maleic and itaconic moieties. The polymer-containing composition also includes from about 10-60% by weight of an organic compound drying agent such as a lower alcohol which facilitates drying and easy field application of the complete fertilizer composition.

The invention discloses maleopimaric acid modified polysiloxane resin and a preparation method thereof. The maleopimaric acid modified polysiloxane resin is characterized by having a structure represented by a formula shown in descriptions, wherein R1 is C2-8 straight-chain or branched-chain alkyl, R2 is C2-3 straight-chain alkyl, X is a sub organic group, m and n are natural numbers between 1 and 200, and the ratio of n and m meets the condition that n / m is not smaller than 0.01 and not greater than 10. According to the maleopimaric acid modified polysiloxane resin disclosed by the invention, a ternary phenanthrene ring and an imide heteroatomic ring which have certain rigidity and polarity are introduced into organosilicon resin, so that the rigidity and polarity of a molecular chain are improved, and meanwhile, the properties, such as water resistance, high-temperature resistance, electric insulation, adhesive power and the like, of the resin are improved; the prepared maleopimaric acid modified polysiloxane resin has excellent intermiscibility with organosilicon materials, and mechanical properties, such as hardness, tear strength, resilience and the like, of the organosilicon rubber can be remarkably improved.

The invention discloses a modified polyvinyl chloride cable material with high cold resistance. The modified polyvinyl chloride cable material is prepared from the following raw materials: polyvinyl chloride, nitrile rubber, maleic anhydride-grafted polypropylene, ethylene-vinyl acetate-carbon monoxide terpolymer, bamboo fiber, modified kaolin, ultra-fine silica dioxide powder, triethyl citrate, acetyl-tri-n-butyl citrate, epoxy sunflower oil, eicosyl dehydroabietate, modified zinc borate, red phosphorus, nanometer aluminum hydroxide, maleopimaric acid lanthanum, methyl tin mercaptide, barium stearate, an antioxidant, and a lubricant. The modified polyvinyl chloride cable material with the high cold resistance disclosed by the invention is high in cold resistance, good in elasticity, good in impact resistance, and excellent in mechanical property; the cable prepared by the modified polyvinyl chloride cable material is long in service life in the cold environment.

The invention discloses a method for synthesizing succinic acid from maleic acid. The method for synthesizing succinic acid from maleic acid comprises the following steps that 1, a catalyst is added into a fixed bed reactor; 2, hydrogen is fed into the fixed bed reactor so that the pressure is stabilized in a range of 5 to 35atm; the reaction system is heated to a temperature of 50 to 150 DEG C; and a maleic acid or maleate aqueous solution having a mass fraction of 1.0 to 25.0% passes through a catalyst bed layer at an airspeed of 0.01 to 5.00h<-1> and then enters into a liquid gathering tank, wherein in reaction, a feeding rate molar ratio of the hydrogen to the maleic acid or maleate aqueous solution is (3.0 to 15.0): 1; 3, reaction liquid obtained by the step 2 is cooled and filtered to form succinic acid or succinate and filtrate; 4, the obtained succinate is acidized and separated to produce succinic acid; and 5, the filtrate obtained by the step 3 is mixed with maleic acid and the excess hydrogen is recovered and recycled. The method for synthesizing succinic acid from maleic acid has the advantages of mild conditions, low cost and high product purity.