Abstract: A soldering process method includes the following steps. A temperature profile of generating a solder structure is measured. A final product of the solder structure is tested and recorded. A machine learning method is used to repeatedly compare and analyze a relationship between a plurality of the temperature profiles of the solder structure and a corresponding final product of the solder structure so as to find an optimal temperature profile model in accordance with quality control requirements.

Abstract: A soldering process method includes the following steps. A temperature profile of generating a solder structure is measured. A final product of the solder structure is tested and recorded. A machine learning method is used to repeatedly compare and analyze a relationship between a plurality of the temperature profiles of the solder structure and a corresponding final product of the solder structure so as to find an optimal temperature profile model in accordance with quality control requirements.

Abstract: In the mass polymerization of an alkenyl aromatic nitrile rubber polymer blend such as ABS by the mass polymerization technique, improved physical properties are obtained in the resultant polymer by the incorporation of water into the mass polymerization process. During polymerization the pressure of the system must be maintained sufficiently high to prevent vaporization of the water.

Abstract: Valuable alkylated aromatic hydrocarbons are produced from a tar comprising that fraction of an alkylation reaction product distilling above about 240.degree. C by a method comprising contacting the tar with benzene and/or toluene in the presence of a catalytic amount of a crystalline aluminosilicate molecular sieve catalyst. For example, tar obtained from the alkylation product resulting from alkylating benzene with ethylene in the presence of aluminum chloride, the tar comprising that fraction of the alkylation reaction product distilling above about 240.degree. C, is converted to a reaction product comprising valuable mono- and diethylbenzene by contacting the tar with benzene in the presence of a catalytic amount of a rare earth exchange zeolite Y molecular sieve at a temperature of at least about 240.degree. C and at a pressure of at least about 200 psi.

Abstract: Indene is recovered in ultrahigh purity from a liquid hydrocarbon mixture comprising indene and organic impurities of which at least one has a melt point above indene and of which at least one has a melt point below indene by a process comprising (1) crystallizing a substantial portion of indene from the mixture and (2) separating the mother liquor from the crystalline indene by passing a non-reactive gas through the crystalline indene.

Abstract: A process for purifying a crude crystalline or crystallizable water-immiscible aromatic compound contaminated with one or more related congeneric impurities which cannot be readily separated by distillation, said process comprising:1. forming a dispersion of liquefied crude material in an aqueous liquid by agitating the mixture;2. effecting crystallization of the desired aromatic compound while maintaining the dispersion;3. reducing agitation sufficiently to permit the formation of three phases, i.e., a solid crystalline phase, an aqueous liquid phase, and a mother liquor phase; and4. separating the crystals;Said aqueous liquid being immiscible with, and having a density between, the aforementioned solid crystalline phase and the mother liquor phase.